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Top JavaScript Developers

JavaScript powers everything from interactive websites to complex enterprise applications. Partnering with an experienced JavaScript development agency ensures your product is fast, secure, and ready to scale. Clutch makes it easy to find trusted providers by publishing in-depth, verified client reviews and transparent performance data. Use our filters to sort agencies by budget, location, framework expertise, and more. Looking for regional specialists? Browse firms in the United States, United Kingdom, or Canada to compare portfolios and pricing in your market. Start exploring today and shortlist partners that align with your goals.
Ratings Updated: May 19, 2026
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15 Leaders 15 Contenders

22,063 Companies

Programming & Scripting: JavaScript

List of the Top JavaScript Development Companies

  • Featured

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    Digis, a Fiverr company (NYSE: FVRR) Logotype

    Digis, a Fiverr company (NYSE: FVRR)

    4.9 89 reviews
    Premier Verified
    $5,000+
    $25 - $49 / hr
    50 - 249
    London, England

    Services provided

    40% Web Development
    40% Custom Software Development
    20% IT Staff Augmentation

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +7
    10% Java
    10% PHP
    10% Python
    10% Rust
    10% SQL
    10% Scala
    10% Swift

    Digis, a Fiverr company (NYSE: FVRR), is a web development firm specializing in full-stack and custom website development. Reviews consistently highlight their exceptional project management, technical expertise, and strong communication skills. Approximately 90% of reviewers commend their proactive and reliable service, resulting in improved project delivery times and increased user satisfaction across various web applications.

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    Reviews mention Unique expertise

    The sentiment regarding Digis's unique expertise is overwhelmingly positive. Clients consistently highlight the depth of technical knowledge and proactive mindset of the team. For instance, one client praised Alex's ability to translate complex business needs into maintainable code, significantly enhancing architectural decisions. Another noted the engineers' exceptional communication and rapid talent sourcing, which consistently met project demands. Overall, clients appreciate the commitment to quality and the collaborative approach, viewing Digis as an integral part of their teams rather than just a vendor.
    • Full Stack Software Development for Software Company
      5.0 Mar 22, 2024

      Digi's project manager, Taniya, and the developers assigned to the project were very experts in their field, friendly, very accommodative, detailed, and willing to go the extra mile to meet our aggressive targets. Digi's project manager, Taniya, handed it very responsibly and on time, constantly bridging the gap between us and the developers. Can't ask for a better manager.

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    • Web & Mobile App Dev for Communication Software Co
      5.0 Mar 6, 2024

      The engineers from Digis are instrumental in maintaining our software and developing innovative features for both our web and mobile applications. What truly stood out was the exceptional communication, the rapidity in sourcing new talent, and the sheer expertise of the engineers they introduced to us. We were never disappointed, as they consistently provided support whenever we needed it.

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    • Custom Data-Driven Product Dev for Email Marketing Platform
      5.0 May 10, 2022

      The project built in high standards, high expertise, with advanced architecture and technologies. Team always suggested improvements and delivered on time. Bringing really great people, usually can find such dedication and good will with vendors as we found here.

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    • E-Commerce Dev for Digital Commerce Agency
      5.0 Mar 23, 2022

      Andriy shows interest in growth, he constantly asks questions, he looks for points of improvement and he is always interested to hear what others have to say about his implementation. In general, Andriy showed pretty strong development skill, he is a great asset to the team.

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    • Tracking Platform Dev for Telecommunications Firm
      4.5 Oct 15, 2020

      We communicate through Skype mainly, and the project management was doing very well. The skills of their developers are very good. Quick comms.

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    Industry Experience

    Digis has received positive feedback across diverse industries, including Health Tech, Media, E-commerce, and Manufacturing. Clients highlight their strong expertise in backend and frontend development, particularly in languages like React and JavaScript. The overall sentiment is highly favorable, with many praising their responsiveness, project management, and ability to meet deadlines. Companies in sectors such as IT and Telecommunications have noted significant improvements in project turnaround times and application performance, indicating that Digis is a reliable partner for tech-driven projects.

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    Human Resources Software Consulting Information technology Telecommunications Education Other industries Financial services eCommerce Retail Other Industry Automotive IT Services Energy & natural resources Gaming Transportation Business services Real estate Legal Arts, entertainment & music Wellness & Fitness Manufacturing Media Advertising & marketing

    View projects from:

    United States (29) Germany (7) Ukraine (7) England (4) France (4) Israel (3) South Africa (2) Canada (2) Italy (2) Sweden (2) Spain (2) Ireland (1) Netherlands (1) New Zealand (1) Poland (1) Romania (1) Russia (1) Lithuania (1) Latvia (1) Japan (1) Australia (1) Georgia (1) Scotland (1) Estonia (1)
    $50,000 Best for Small Companies $75,000 Best for Medium Companies $100,000 Best for Enterprises

    Custom Product Development

    Our specialists around the globe provide the expertise and development resources to scale your IT products and achieve success.
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  • Ezimax Technologies Pvt. Ltd. Logotype

    Not yet reviewed

    $1,000+
    < $25 / hr
    10 - 49
    Noida, India

    Services provided

    40% Web Development
    20% E-Commerce Development
    10% AR/VR Development +3
    10% Enterprise App Modernization
    10% IoT Development
    10% Social Media Marketing

    Focus Areas

    11% JavaScript
    22% SQL
    17% Other programming & scripting languages +6
    11% Ember.js
    11% PHP
    10% Kotlin
    6% ASP.NET
    6% C#
    6% Java

    Web development company Ezimax Technologies Pvt. Ltd. Is based in Noida, India and Los Angeles, California. They provide Web Development and E-Commerce Development.

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  • Emphie Solutions Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    10 - 49
    Gliwice, Poland

    Services provided

    20% Web Development
    25% Product Design
    5% AI Development +10
    5% AR/VR Development
    5% Application Management & Support
    5% BI & Big Data Consulting & SI
    5% Cloud Consulting & SI
    5% Custom Software Development
    5% Enterprise App Modernization
    5% IoT Development
    5% Mobile App Development
    5% Other IT Consulting and SI
    5% Wearable App Development

    Focus Areas

    31% JavaScript
    16% Typescript
    11% Python +6
    11% SQL
    11% Swift
    5% C#
    5% Kotlin
    5% PHP
    5% Redux

    Located in Gliwice, Poland, Emphie Solutions is a Product Design company. Their services include Product Design and Web Development.

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  • Amarok Creative Logotype

    Not yet reviewed

    Undisclosed
    $100 - $149 / hr
    Freelancer
    Carmel, IN

    Services provided

    85% Web Development
    10% Search Engine Optimization
    5% Pay Per Click

    Focus Areas

    35% JavaScript
    50% PHP
    15% Python

    Amarok Creative, a web development firm, is located in Carmel, Indiana. Their services include Web Development and Search Engine Optimization.

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  • Stupendous Web Logotype

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    Freelancer
    Las Vegas, NV

    Services provided

    35% Web Development
    35% Custom Software Development
    30% Mobile App Development

    Focus Areas

    100% JavaScript

    In Las Vegas, Nevada, Stupendous Web is a custom software development company. The team focuses on Custom Software Development and Web Development.

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  • Any Screen Size B.V. Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    Freelancer
    's-Hertogenbosch, Netherlands

    Services provided

    30% Web Development
    30% Web Design
    20% Search Engine Optimization +1
    20% UX/UI Design

    Focus Areas

    25% JavaScript
    55% HTML5
    10% PHP +1
    10% jquery

    Web design agency Any Screen Size B.V. Was established in 2011. The small team focuses on Web Design and Web Development.

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  • Lucas Mattos Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer
    Florianópolis, Brazil

    Services provided

    35% Web Development
    35% Custom Software Development
    30% Cloud Consulting & SI

    Focus Areas

    50% JavaScript
    50% Java

    Established in 2013, Lucas Mattos is a software development firm. The small team specializes in Custom Software Development and Web Development.

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  • Knockout Software Logotype

    Knockout Software

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    2 - 9

    Services provided

    30% Web Development
    40% Custom Software Development
    30% Mobile App Development

    Focus Areas

    33% JavaScript
    34% C#
    33% ASP.NET

    Custom software development firm Knockout Software specializes in Custom Software Development and Mobile App Development. They are in Cambridge, England.

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  • StoryWorks Studio Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    10 - 49
    Helsinki, Finland

    Services provided

    15% Web Development
    25% UX/UI Design
    20% Web Design +5
    10% AR/VR Development
    10% Content Marketing
    10% Low/No Code Development
    5% Ecommerce Marketing
    5% Other Digital Marketing

    Focus Areas

    39% JavaScript
    17% Python
    17% Ruby +2
    16% PHP
    11% ASP.NET

    StoryWorks Studio is a web design company launched in 2019. The team focuses on Web Design and UX/UI Design and is in Helsinki, Finland.

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  • SeaMonster Studios Logotype

    Not yet reviewed

    $1,000+
    $150 - $199 / hr
    2 - 9
    Seattle, WA

    Services provided

    25% Web Development
    15% E-Commerce Development
    15% UX/UI Design +7
    15% Web Design
    5% Branding
    5% Digital Strategy
    5% Graphic Design
    5% Logo
    5% Mobile App Development
    5% Packaging Design

    Focus Areas

    30% JavaScript
    30% PHP
    10% AJAX +3
    10% Other programming & scripting languages
    10% Redux
    10% Swift

    SeaMonster Studios, a web development firm, was launched in 2007. In Seattle, Washington, the team focuses on Web Development and UX/UI Design.

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  • 11 Online Logotype

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    2 - 9
    Albuquerque, NM

    Services provided

    35% Web Development
    20% Web Design
    15% Custom Software Development +3
    10% E-Commerce Development
    10% Mobile App Development
    10% Search Engine Optimization

    Focus Areas

    20% JavaScript
    50% PHP
    30% Other programming & scripting languages

    11 Online is a website development company. The team focuses on Web Development and Web Design, and the agency is headquartered in Albuquerque, New Mexico.

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  • Typi Design Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    2 - 9
    Ixelles, Belgium

    Services provided

    30% Web Development
    25% Web Design
    15% Logo +3
    15% UX/UI Design
    10% Graphic Design
    5% Mobile App Development

    Focus Areas

    25% JavaScript
    25% HTML5
    25% PHP +1
    25% Typescript

    Typi Design is a web development firm. Headquartered in Ixelles, Belgium, the team specializes in Web Development and Web Design.

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  • Pink Panda Logotype

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    2 - 9
    Flinders Park, Australia

    Services provided

    25% Web Development
    25% Mobile App Development
    25% UX/UI Design +1
    25% Web Design

    Focus Areas

    30% JavaScript
    40% PHP
    20% Typescript +1
    10% Other programming & scripting languages

    Pink Panda is a Flinders Park, Australia-based web design company. They offer Web Design and UX/UI Design.

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  • PROXYONE LLC Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Poznań, Poland

    Services provided

    35% Web Development
    12% UX/UI Design
    10% Web Design +15
    5% CRM Consulting and SI
    5% Cloud Consulting & SI
    5% Custom Software Development
    5% Mobile App Development
    5% Other Application Development
    3% Wearable App Development
    2% Architectural Design
    2% E-Commerce Development
    2% Graphic Design
    2% Logo
    2% Print Design
    2% Product Design
    1% Application Management & Support
    1% Blockchain
    1% IT Strategy Consulting

    Focus Areas

    20% JavaScript
    50% Ruby
    10% Go +2
    10% Other programming & scripting languages
    10% SQL

    PROXYONE LLC is a web development firm. They specialize in Web Development and UX/UI Design and were established in 2021. The firm is in Poznań, Poland.

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  • Pixeio Logotype

    5.0 1 review
    Undisclosed
    $25 - $49 / hr
    50 - 249
    Chicago, IL

    Services provided

    25% Web Development
    25% E-Commerce Development
    25% Mobile App Development +2
    15% Custom Software Development
    10% Low/No Code Development

    Focus Areas

    20% JavaScript
    15% PHP
    12% Swift +11
    10% Ruby
    8% Objective C
    6% Java
    5% Kotlin
    5% Python
    5% SQL
    4% Go
    3% AJAX
    3% C++
    2% ASP
    2% ASP.NET

    Pixeio offers a comprehensive range of technological solutions, including Website Development, Web Design, and mobile and software development. The overall feedback highlights Pixeio's ability to deliver tailored, high-quality solutions that increase engagement and conversion rates while ensuring affordability and seamless collaboration. Clients value their responsiveness and flexibility, although suggestions for more detailed progress reports were noted.

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  • Optimal Arc Web Development Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    Freelancer
    Nelson, Canada

    Services provided

    40% Web Development
    40% Web Design
    10% Search Engine Optimization +2
    5% Digital Strategy
    5% Email Marketing

    Focus Areas

    50% JavaScript
    50% PHP

    Optimal Arc Web Development is a web design company based in Nelson, Canada. They provide Web Design and Web Development.

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  • Out of business Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer
    None, PA

    Services provided

    50% Web Development
    50% E-Commerce Development

    Focus Areas

    40% JavaScript
    50% PHP
    10% Other programming & scripting languages

    Out of business, a website development firm and e-commerce development firm, was founded in 2019. The team focuses on Web Development and E-Commerce Development.

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  • Revolt Media Logotype

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    Freelancer
    Reno, NV

    Services provided

    75% Web Development
    10% Custom Software Development
    10% Mobile App Development +1
    5% E-Commerce Development

    Focus Areas

    40% JavaScript
    60% PHP

    Revolt Media, a web development firm, provide Web Development and Custom Software Development. They were founded in 2001.

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  • Loomi Logotype

    Not yet reviewed

    $10,000+
    $25 - $49 / hr
    50 - 249
    Recife, Brazil

    Services provided

    25% Web Development
    45% Mobile App Development
    10% Blockchain +2
    10% E-Commerce Development
    10% Robotics Process Automation

    Focus Areas

    20% JavaScript
    40% Typescript
    20% Python +1
    20% SQL

    Midsize app development firm Loomi, is headquartered in Recife, Brazil and São Paulo, Brazil. The team focuses on Mobile App Development and Web Development.

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  • Lab9 Digital Agency Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    50 - 249
    San Miguel de Tucumán, Argentina

    Services provided

    20% Web Development
    30% Custom Software Development
    10% AI Consulting +4
    10% AI Development
    10% E-Commerce Development
    10% Generative AI
    10% UX/UI Design

    Focus Areas

    25% JavaScript
    25% C#
    10% Python +5
    10% Redux
    10% SQL
    10% Typescript
    5% PHP
    5% XML

    Lab9 Digital Agency is a midsize software development firm established in 2017. Their team specializes in Custom Software Development and Web Development.

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  • EXPANDYA Logotype

    EXPANDYA

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249

    Services provided

    15% Web Development
    25% E-Commerce Development
    20% Other Application Development +4
    10% Cloud Consulting & SI
    10% Custom Software Development
    10% Low/No Code Development
    10% UX/UI Design

    Focus Areas

    30% JavaScript
    40% Other programming & scripting languages
    30% PHP

    Launched in 2010, EXPANDYA is a midsize Fairfield, Connecticut-based web development company. Their team focuses on Web Development and E-Commerce Development.

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  • Ceegees Software Solutions Pvt Ltd Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    50 - 249
    Bengaluru, India

    Services provided

    10% Web Development
    20% Mobile App Development
    10% AI Development +6
    10% AR/VR Development
    10% Blockchain
    10% Custom Software Development
    10% E-Commerce Development
    10% Low/No Code Development
    10% Wearable App Development

    Focus Areas

    20% JavaScript
    10% AJAX
    10% C++ +7
    10% Go
    10% Objective C
    10% PHP
    10% Python
    10% Visual Basic
    5% HTML5
    5% Redux

    Ceegees Software Solutions Pvt Ltd is a custom software development company. Headquartered in Bengaluru, India, their team specializes in Custom Software Development and Mobile App Development.

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  • ZeroBug Logotype

    Not yet reviewed

    $1,000+
    < $25 / hr
    50 - 249
    New Delhi, India

    Services provided

    25% Web Development
    25% E-Commerce Development
    25% Mobile App Development +2
    15% Web Design
    10% Low/No Code Development

    Focus Areas

    20% JavaScript
    20% Java
    20% Ruby +2
    20% SQL
    20% Typescript

    Based in New Delhi, India, ZeroBug is a midsize web design agency. Their services include Web Design and Web Development.

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  • Cybercom Creation Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    50 - 249
    Ahmedabad, India

    Services provided

    15% Web Development
    25% E-Commerce Development
    20% Mobile App Development +4
    15% Low/No Code Development
    10% AI Development
    10% Custom Software Development
    5% Blockchain

    Focus Areas

    30% JavaScript
    30% PHP
    10% Python +6
    5% ASP.NET
    5% HTML5
    5% Java
    5% Kotlin
    5% SQL
    5% Typescript

    Cybercom Creation is a web development firm. The team offers Web Development and E-Commerce Development, and the firm is based in Ahmedabad, India.

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  • Techkshetra Info Solutions Pvt.Ltd. Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    10 - 49
    Bengaluru, India

    Services provided

    25% Web Development
    25% ERP Consulting and SI
    25% IT Strategy Consulting +1
    25% Mobile App Development

    Focus Areas

    25% JavaScript
    25% HTML5
    25% PHP +1
    25% SQL

    Headquartered in Bengaluru, India, Techkshetra Info Solutions Pvt.Ltd. Is a small IT strategy consulting company. Their services include IT strategy consulting and ERP consulting and SI.

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  • Swift N Tech Logotype

    Swift N Tech

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    50 - 249

    Services provided

    35% Web Development
    35% E-Commerce Development
    15% Web Design +2
    10% Graphic Design
    5% Logo

    Focus Areas

    10% JavaScript
    50% HTML5
    25% PHP +1
    15% jquery

    Established in 2016, Swift N Tech is an e-commerce development company. The agency specializes in E-Commerce Development and Web Development.

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  • Renee Systems Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    50 - 249
    Hyderabad, India

    Services provided

    20% Web Development
    20% AI Development
    20% Mobile App Development +2
    20% UX/UI Design
    20% Web Design

    Focus Areas

    25% JavaScript
    30% ASP.NET
    25% SQL +1
    20% HTML5

    Founded in 2013, Renee Systems is a web design company. Their team focuses on Web Design and UX/UI Design.

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  • Ayan Sujon Logotype

    Ayan Sujon

    Not yet reviewed

    $1,000+
    < $25 / hr
    Freelancer

    Services provided

    40% Web Development
    40% E-Commerce Development
    20% Web Design

    Focus Areas

    60% JavaScript
    40% Typescript

    Ayan Sujon is a web development firm. Located in Noakhali, Bangladesh, the firm offers Web Development and E-Commerce Development.

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  • Just Move Limited Logotype

    Just Move Limited

    Not yet reviewed

    $1,000+
    Undisclosed
    2 - 9

    Services provided

    24% Web Development
    15% E-Commerce Development
    15% IT Strategy Consulting +7
    15% Mobile App Development
    10% UX/UI Design
    9% Web Design
    3% Blockchain
    3% Graphic Design
    3% IoT Development
    3% Logo

    Focus Areas

    20% JavaScript
    70% Java
    5% AJAX +3
    2% PHP
    2% Swift
    1% Objective C

    Launched in 2015, Just Move Limited is a small web development firm. Their team offers Web Development and E-Commerce Development.

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  • XM Digitals Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9
    Jakarta, Indonesia

    Services provided

    20% Web Development
    20% Email Marketing
    20% Mobile App Development +3
    20% UX/UI Design
    10% E-Commerce Development
    10% Web Design

    Focus Areas

    30% JavaScript
    50% PHP
    20% Redux

    Established in 2025, XM Digitals is an UX design company. The team provides UX/UI Design and Email Marketing and is in Jakarta, Indonesia.

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  • BlankPage Agency Logotype

    5.0 7 reviews
    $1,000+
    $50 - $99 / hr
    10 - 49
    Alexandria, Egypt

    Services provided

    45% Web Development
    15% UX/UI Design
    10% Branding +3
    10% Mobile App Development
    10% Product Design
    10% Web Design

    Focus Areas

    50% JavaScript
    50% PHP

    BlankPage Agency is a web development company that excels in custom website development and full-stack web development, offering services such as web programming and front-end and back-end development. Their reviews reflect a strong reputation for professionalism, responsiveness, and timely delivery, with 100% of reviewers praising their ability to meet project requirements and deliver on-time. Clients consistently commend their adaptability and effective communication skills.

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    Reviews mention Accessible

    Clients have consistently praised BlankPage Agency for their accessibility and responsiveness throughout projects. One client noted their 'incredible responsiveness' and willingness to address questions post-project, while another highlighted their effective communication and timely delivery of milestones. The agency's team is recognized for being available to address issues and providing clear instructions, ensuring a smooth collaboration. Overall, the sentiment regarding accessibility is highly positive, reflecting a commitment to client satisfaction.
    • Web Design & Dev for Data & Analytics Co
      5.0 Jun 27, 2024

      The team at BlankPage delivered items and milestones on time and were available to answer questions or address any issues that arose. They did an great job of communicating project progress and providing clear instructions for what was needed when our input was required to move things forward. The team was also very considerate of our budget and when possible made recommendations about ways to deliver the same quality at a lower cost.

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    Industry Experience

    BlankPage Agency has demonstrated expertise across diverse industries including Healthcare, Software, Consulting, Arts & Entertainment, and Other sectors. Clients praise their responsiveness, project management skills, and ability to deliver high-quality web design and application development tailored to specific needs. Overall sentiment is positive, highlighting BlankPage's strengths in fostering effective communication and understanding client goals, making them a suitable choice for organizations seeking innovative digital solutions.

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    Select Industry to see insights

    Healthcare Software Consulting Other Industry Arts, entertainment & music

    More responsive than most other service providers

    BlankPage Agency is very responsive

    They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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    United States (5) United Arab Emirates (1) Egypt (1)
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  • CremUX Logotype

    CremUX

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    10 - 49

    Services provided

    15% Web Development
    25% Mobile App Development
    25% UX/UI Design +2
    25% Web Design
    10% AR/VR Development

    Focus Areas

    44% JavaScript
    25% Swift
    19% Python +1
    12% Typescript

    Established in 2015, CremUX is a web design agency. The team focuses on Web Design and UX/UI Design.

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  • Quixas Technology Logotype

    Quixas Technology

    4.8 3 reviews
    $10,000+
    $50 - $99 / hr
    10 - 49

    Services provided

    20% Web Development
    30% Generative AI
    20% Custom Software Development +2
    20% Mobile App Development
    10% AI Development

    Focus Areas

    20% JavaScript
    30% Python
    20% Typescript +4
    10% Redux
    10% SQL
    5% C#
    5% PHP

    Quixas Technology offers a range of services, including custom software development, AI-enabled financial management platforms, and e-commerce website design and development. Reviews consistently highlight their technical expertise, effective project management, and exceptional customer service. Clients appreciate their professionalism, seamless communication, and the ability to deliver high-quality results, making Quixas Technology a trusted partner for complex projects.

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  • Protovo Solutions LLP Logotype

    5.0 2 reviews
    $1,000+
    $25 - $49 / hr
    10 - 49
    Bhilwara, India

    Services provided

    10% Web Development
    10% CRM Consulting and SI
    10% Custom Software Development +13
    10% Web Design
    5% Accounting
    5% Application Management & Support
    5% Back Office Outsourcing
    5% Business Consulting
    5% Content Writing Services
    5% Customer Service Outsourcing
    5% E-Commerce Development
    5% ERP Consulting and SI
    5% IT Strategy Consulting
    5% Mobile App Development
    5% Sales Outsourcing
    5% Search Engine Optimization

    Focus Areas

    20% JavaScript
    30% PHP
    20% Other programming & scripting languages +4
    10% HTML5
    10% XML
    5% AJAX
    5% Typescript

    Protovo Solutions LLP Protovo Solutions LLP specializes in Website Development, offering exceptional programming and reliable ongoing support for projects, as evidenced by their work on a dating website. The reviews highlight their impressive speed, availability, and high-quality service, making them a trustworthy partner for web development needs.

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  • Digidoers India Pvt. Ltd. Logotype

    Digidoers India Pvt. Ltd.

    Not yet reviewed

    $1,000+
    < $25 / hr
    10 - 49

    Services provided

    25% Web Development
    25% E-Commerce Development
    20% Web Design +3
    10% Digital Strategy
    10% Mobile App Development
    10% Search Engine Optimization

    Focus Areas

    15% JavaScript
    30% PHP
    25% SQL +2
    20% Java
    10% ASP.NET

    E-commerce development firm Digidoers India Pvt. Ltd. Was launched in 2018. The agency specializes in E-Commerce Development and Web Development, and is small.

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  • Cogent Web Services Logotype

    Not yet reviewed

    $1,000+
    < $25 / hr
    10 - 49
    New Delhi, India

    Services provided

    20% Web Development
    80% Mobile App Development

    Focus Areas

    20% JavaScript
    20% Java
    20% PHP +3
    20% Python
    10% SQL
    10% Swift

    App development firm Cogent Web Services is in New Delhi, India. They provide Mobile App Development and Web Development and were established in 2017.

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  • Simple Tech Innovations Logotype

    Simple Tech Innovations

    Not yet reviewed

    $5,000+
    Undisclosed
    10 - 49

    Services provided

    10% Web Development
    35% Cybersecurity
    25% IT Managed Services +3
    10% AI Agents
    10% AI Consulting
    10% IT Strategy Consulting

    Focus Areas

    30% JavaScript
    50% PHP
    20% SQL

    Cybersecurity company Simple Tech Innovations was launched in 2007. The team offers Cybersecurity and IT managed services and is based in Rochester, New York.

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  • View.ge Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    10 - 49
    Rustavi, Georgia

    Services provided

    15% Web Development
    25% Video Marketing
    20% E-Commerce Development +4
    20% Search Engine Optimization
    10% Ecommerce Marketing
    5% Content Marketing
    5% Social Media Marketing

    Focus Areas

    26% JavaScript
    21% Kotlin
    21% SQL +2
    16% AJAX
    16% PHP

    Founded in 2014, View.ge is a small Rustavi, Georgia-based Video Marketing company. Their team provides Video Marketing and Search Engine Optimization.

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  • The Ant Firm, Ltd. Logotype

    The Ant Firm, Ltd.

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9

    Services provided

    20% Web Development
    60% Web Design
    20% Search Engine Optimization

    Focus Areas

    20% JavaScript
    40% Other programming & scripting languages
    40% PHP

    In Toronto, Canada, The Ant Firm, Ltd. Is a web design agency. Their services include Web Design and Web Development.

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  • Cognisun Infotech Pvt. Ltd. Logotype

    Not yet reviewed

    $1,000+
    < $25 / hr
    10 - 49
    Ahmedabad, India

    Services provided

    10% Web Development
    10% Custom Software Development
    10% E-Commerce Development +7
    10% Mobile App Development
    10% Other Application Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP +7
    10% ASP.NET
    10% Apex
    10% Java
    10% Kotlin
    10% PHP
    10% Python
    10% XML

    Custom software development firm Cognisun Infotech Pvt. Ltd. Was established in 2007. The small team specializes in Custom Software Development and UX/UI Design.

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  • MGS (Mega Giga Solusindo) Logotype

    Not yet reviewed

    $10,000+
    $25 - $49 / hr
    10 - 49
    Special Region of Yogyakarta, Indonesia

    Services provided

    15% Web Development
    40% IT Staff Augmentation
    20% Enterprise App Modernization +3
    10% Application Management & Support
    10% Custom Software Development
    5% IoT Development

    Focus Areas

    30% JavaScript
    30% Java
    20% PHP +3
    10% XML
    5% SQL
    5% Swift

    IT staff augmentation company MGS (Mega Giga Solusindo) provides IT staff augmentation and Enterprise App Modernization. They are in Special Region of Yogyakarta, Indonesia.

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  • Umano Logic Logotype

    Umano Logic

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49

    Services provided

    20% Web Development
    20% E-Commerce Development
    20% Mobile App Development +2
    20% Search Engine Optimization
    20% Social Media Marketing

    Focus Areas

    25% JavaScript
    25% HTML5
    25% PHP +1
    25% Python

    In Edmonton, Canada, Umano Logic is a social media marketing firm. They provide Social Media Marketing and Search Engine Optimization.

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  • Heksadev Logotype

    Heksadev

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    10 - 49

    Services provided

    35% Web Development
    35% Custom Software Development
    10% AI Development +2
    10% Mobile App Development
    10% UX/UI Design

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +8
    10% Go
    10% Python
    10% Redux
    10% SQL
    10% Swift
    10% Typescript
    5% HTML5
    5% jquery

    Heksadev is a software development company founded in 2020. Located in Zagreb, Croatia and Zagreb, Croatia, the team offers Custom Software Development and Web Development.

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  • Gaira Consulting Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Bogotá, Colombia

    Services provided

    15% Web Development
    30% Custom Software Development
    15% AR/VR Development +4
    15% E-Commerce Development
    15% Mobile App Development
    5% UX/UI Design
    5% Web Design

    Focus Areas

    27% JavaScript
    33% HTML5
    13% SQL +3
    13% XML
    7% Python
    7% Typescript

    Launched in 2014, Gaira Consulting, a small software development firm, is in Bogotá, Colombia. Their team focuses on Custom Software Development and Web Development.

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  • Odichi Solutions Logotype

    Odichi Solutions

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249

    Services provided

    10% Web Development
    10% Conversion Optimization
    10% Digital Strategy +7
    10% E-Commerce Development
    10% Market Research
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    15% JavaScript
    15% PHP
    10% AJAX +10
    10% HTML5
    10% Python
    5% C#
    5% C++
    5% Java
    5% SQL
    5% Swift
    5% Typescript
    5% Visual Basic
    5% jquery

    Based in Abuja, Nigeria and Lagos, Nigeria, Odichi Solutions is a Market Research company. Their services include Market Research and Digital Strategy.

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  • Innolab AI Logotype

    5.0 1 review
    $10,000+
    $50 - $99 / hr
    10 - 49
    Columbus, OH

    Services provided

    20% Web Development
    30% AI Development
    20% Mobile App Development +2
    20% UX/UI Design
    10% Cloud Consulting & SI

    Focus Areas

    10% JavaScript
    10% Ember.js
    10% Go +7
    10% Java
    10% Kotlin
    10% Objective C
    10% Perl
    10% Python
    10% Ruby
    10% Swift

    Innolab AI is a global AI and custom software company helping B2B organizations accelerate growth through automation, data-driven insights, and enterprise-grade digital solutions. Founded in 2020,

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  • Horizon Information Technology Logotype

    5.0 2 reviews
    $100,000+
    $300+ / hr
    50 - 249
    Riyadh, Saudi Arabia

    Services provided

    25% Web Development
    40% Custom Software Development
    25% Mobile App Development +1
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    20% ASP.NET
    15% SQL +6
    10% AJAX
    10% C#
    10% Swift
    10% Visual Basic
    10% XML
    5% Other programming & scripting languages

    Horizon Information Technology offers services in developing ERP systems and custom software solutions, as well as IT infrastructure support. Overall feedback highlights successful project outcomes, particularly in system functionality and efficiency improvements. However, there are concerns regarding project timelines, with some clients noting delays. Despite this, some clients express satisfaction with the results and responsiveness of Horizon Information Technology.

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  • GML SOFTWARE Logotype

    4.5 1 review
    $50,000+
    $25 - $49 / hr
    50 - 249
    Bogotá, Colombia

    Services provided

    15% Web Development
    40% IT Staff Augmentation
    15% Custom Software Development +2
    15% IT Strategy Consulting
    15% Mobile App Development

    Focus Areas

    20% JavaScript
    20% C#
    20% Java +3
    20% Python
    10% ASP.NET
    10% PHP

    GML SOFTWARE specializes in developing specific features for SaaS platforms, demonstrating a strong alignment with client values and a commendable focus on customer service. Their proprietary development methodology ensures timely delivery, with clients lauding their culture fit and effective communication. Overall, GML SOFTWARE is noted for its methodical approach and successful project execution.

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  • Class-S Logotype

    Class-S

    Not yet reviewed

    $1,000+
    < $25 / hr
    2 - 9

    Services provided

    35% Web Development
    35% Web Design
    10% Custom Software Development +2
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

    20% JavaScript
    20% C#
    20% PHP +2
    20% SQL
    20% Visual Basic

    Website development company Class-S is based in General Mariano Alvarez, Philippines. Launched in 2024, the team focuses on Web Development and Web Design.

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    $1,000 Best for businesses that need landing pages. $1,800 more customization and an enhanced online presence $3,000 for businesses with advanced website requirements.

    Website Design and Development

    Class-S Web Solutions designs and develops responsive, high-performing websites built around your business goals. Whether you need a brand-new website or a complete revamp, our team ensures we combine clean design, smart structure, and reliable technology to create websites that reflect your brand, engage users, and support long-term growth.
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  • Web Designs by Chris Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9
    Chapmansboro, TN

    Services provided

    25% Web Development
    25% Mobile App Development
    25% Search Engine Optimization +1
    25% Web Design

    Focus Areas

    30% JavaScript
    60% HTML5
    10% jquery

    SEO services firm Web Designs by Chris focuses on Search Engine Optimization and Web Design. They were founded in 2010.

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  • Techno Tweak Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9
    Karachi, Pakistan

    Services provided

    25% Web Development
    25% Custom Software Development
    25% Mobile App Development +1
    25% Web Design

    Focus Areas

    30% JavaScript
    20% Typescript
    20% jquery +2
    15% HTML5
    15% PHP

    Techno Tweak is a web development firm. They were launched in 2024, and their services include Web Development and Web Design.

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We evaluate service providers using a structured methodology that combines:

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Ability to deliver
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Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 ImageX
2 xfive
3 Brainhub
4 The Software House
5 Xmartlabs
6 Airdev
7 WPWeb Infotech
8 Lizard Global
9 PopArt Studio
10 Softonix
11 GeekyAnts
12 INOXOFT
13 Scopic
14 HTMLPanda
15 Vention

List of the Top 15 JavaScript Development Companies

  1. ImageX Logotype

    ImageX

    $75,000+
    $100 - $149 / hr
    50 - 249
    Vancouver, Canada

    Ability to deliver

    39.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    90% Web Development
    50% JavaScript
    10% Other
    View Profile Visit Website
  2. xfive Logotype

    xfive

    $25,000+
    $50 - $99 / hr
    50 - 249
    Kraków, Poland

    Ability to deliver

    39.3/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  3. Brainhub Logotype

    Brainhub

    $50,000+
    $50 - $99 / hr
    50 - 249
    Gliwice, Poland

    Ability to deliver

    39.3/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    45% Web Development
    75% JavaScript
    55% Other
    View Profile Visit Website
  4. The Software House Logotype

    The Software House

    $25,000+
    $50 - $99 / hr
    50 - 249
    Gliwice, Poland

    Ability to deliver

    39.8/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    40% Web Development
    60% JavaScript
    60% Other
    View Profile Visit Website
  5. Xmartlabs Logotype

    Xmartlabs

    $10,000+
    $50 - $99 / hr
    50 - 249
    Montevideo, Uruguay

    Ability to deliver

    39.5/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    50% Web Development
    35% JavaScript
    50% Other
    View Profile Visit Website
  6. Airdev Logotype

    Airdev

    $10,000+
    Undisclosed
    50 - 249
    San Francisco, CA

    Ability to deliver

    38.5/40.0
    19.2/20 Reviews
    9.6/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  7. WPWeb Infotech Logotype

    WPWeb Infotech

    $25,000+
    < $25 / hr
    250 - 999
    Ahmedabad, India

    Ability to deliver

    39.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    65% Web Development
    20% JavaScript
    35% Other
    View Profile Visit Website
  8. Lizard Global Logotype

    Lizard Global

    $10,000+
    $50 - $99 / hr
    50 - 249
    Kuala Lumpur, Malaysia

    Ability to deliver

    39.3/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

    30% Web Development
    70% JavaScript
    70% Other
    View Profile Visit Website
  9. PopArt Studio Logotype

    PopArt Studio

    $5,000+
    $50 - $99 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

    39.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    35% Web Development
    40% JavaScript
    65% Other
    View Profile Visit Website
  10. Softonix Logotype

    Softonix

    $5,000+
    $25 - $49 / hr
    50 - 249
    L'viv, Ukraine

    Ability to deliver

    36.3/40.0
    17.4/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  11. GeekyAnts Logotype

    GeekyAnts

    $10,000+
    $25 - $49 / hr
    250 - 999
    San Francisco, CA

    Ability to deliver

    39.9/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    15% Web Development
    40% JavaScript
    85% Other
    View Profile Visit Website
  12. INOXOFT Logotype

    INOXOFT

    $25,000+
    $25 - $49 / hr
    50 - 249
    Newark, DE

    Ability to deliver

    39.6/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  13. Scopic Logotype

    Scopic

    $10,000+
    $50 - $99 / hr
    250 - 999
    Marlborough, MA

    Ability to deliver

    39.3/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    25% Web Development
    25% JavaScript
    75% Other
    View Profile Visit Website
  14. HTMLPanda Logotype

    HTMLPanda

    $1,000+
    < $25 / hr
    250 - 999
    Walpole, MA

    Ability to deliver

    35.9/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  16. SpdLoad Logotype

    SpdLoad

    $50,000+
    $25 - $49 / hr
    50 - 249
    Kharkiv, Ukraine

    Ability to deliver

    36.4/40.0
    16.6/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    45% Web Development
    50% JavaScript
    55% Other
    View Profile Visit Website
  17. Techuz InfoWeb Pvt. Ltd. Logotype

    Techuz InfoWeb Pvt. Ltd.

    $5,000+
    < $25 / hr
    50 - 249
    Ahmedabad, India

    Ability to deliver

    36.3/40.0
    16.6/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  18. PowerGate Software Logotype

    PowerGate Software

    $10,000+
    < $25 / hr
    250 - 999
    Hanoi, Vietnam

    Ability to deliver

    38.7/40.0
    19.2/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    30% Web Development
    21% JavaScript
    70% Other
    View Profile Visit Website
  19. Incora Logotype

    Incora

    $25,000+
    $25 - $49 / hr
    50 - 249
    L'viv, Ukraine

    Ability to deliver

    37/40.0
    18/20 Reviews
    10/10 Clients & Experience
    9/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  20. Toptal Logotype

    Toptal

    $50,000+
    $100 - $149 / hr
    1,000 - 9,999
    San Francisco, CA

    Ability to deliver

    38.3/40.0
    18.4/20 Reviews
    9.9/10 Clients & Experience
    10/10 Market Presence

    Service focus

    15% Web Development
    25% JavaScript
    85% Other
    View Profile Visit Website
  21. Arcanys Logotype

    Arcanys

    $100,000+
    $25 - $49 / hr
    250 - 999
    Cebu City, Philippines

    Ability to deliver

    38.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    8.7/10 Market Presence

    Service focus

    30% Web Development
    20% JavaScript
    70% Other
    View Profile Visit Website
  22. Cleveroad Logotype

    Cleveroad

    $10,000+
    $25 - $49 / hr
    250 - 999
    New York, NY

    Ability to deliver

    40/40.0
    20/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    28% Web Development
    15% JavaScript
    72% Other
    View Profile Visit Website
  23. Blazity Logotype

    Blazity

    $10,000+
    $50 - $99 / hr
    10 - 49
    Warszawa, Poland

    Ability to deliver

    37.5/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

    50% Web Development
    70% JavaScript
    50% Other
    View Profile Visit Website
  24. Experion Technologies Logotype

    Experion Technologies

    $10,000+
    $25 - $49 / hr
    1,000 - 9,999
    Plano, TX

    Ability to deliver

    36.5/40.0
    16.8/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% Other
    View Profile Visit Website
  25. Human Made Logotype

    Human Made

    $50,000+
    $150 - $199 / hr
    50 - 249
    Matlock, England

    Ability to deliver

    37.8/40.0
    18/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    100% Web Development
    30% JavaScript
    View Profile Visit Website
  26. Vincit Logotype

    Vincit

    $50,000+
    $150 - $199 / hr
    250 - 999
    Irvine, CA

    Ability to deliver

    36.2/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    30% Web Development
    30% JavaScript
    70% Other
    View Profile Visit Website
  27. XWP Logotype

    XWP

    $50,000+
    $150 - $199 / hr
    50 - 249
    New York, NY

    Ability to deliver

    35.5/40.0
    15.8/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  28. Flowout Logotype

    Flowout

    $5,000+
    $50 - $99 / hr
    50 - 249
    Maribor, Slovenia

    Ability to deliver

    36.1/40.0
    20/20 Reviews
    10/10 Clients & Experience
    6.1/10 Market Presence

    Service focus

    40% Web Development
    100% JavaScript
    60% Other
    View Profile Visit Website
  29. Sigma Software Group Logotype

    Sigma Software Group

    $50,000+
    $50 - $99 / hr
    1,000 - 9,999
    L'viv, Ukraine

    Ability to deliver

    37.6/40.0
    17.8/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    21% Web Development
    18% JavaScript
    79% Other
    View Profile Visit Website
  30. Merixstudio Logotype

    Merixstudio

    $25,000+
    $50 - $99 / hr
    50 - 249
    Poznań, Poland

    Ability to deliver

    40/40.0
    20/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    50% Web Development
    10% JavaScript
    50% Other
    View Profile Visit Website

Top JavaScript Development Agencies

A JavaScript development company designs, builds, and maintains software products that rely on JavaScript across the stack. Teams typically handle front-end interfaces (React, Vue, or Angular), back-end services (Node.js, Express, NestJS), and database integrations. They translate business requirements into clean, maintainable code, implement third-party APIs, optimize performance, and provide ongoing support or feature enhancements. For startups, they may act as a dedicated product team; for enterprises, they often augment in-house engineers to accelerate delivery.

Most agencies bundle multiple offerings so clients can access full product life-cycle support:

  • Discovery workshops & technical consulting
  • UI/UX design and prototyping
  • Front-end SPA or PWA development
  • Server-side development with Node.js or Deno
  • API design, GraphQL, and microservices architecture
  • QA automation & performance testing
  • DevOps, CI/CD, and cloud deployment (AWS, Azure, GCP)
  • Post-launch maintenance and feature sprints

Some firms specialize in niches such as ecommerce storefronts, real-time dashboards, or IoT applications built with JavaScript frameworks like Next.js or Svelte.

Clutch data shows project budgets range widely:

  • MVP or small web app - $15,000–$50,000
  • Mid-size product build - $50,000–$200,000
  • Enterprise-grade platform - $200,000–$1M+ | Hourly rates usually fall between $50–$149 depending on agency location, seniority, and specialization. Expect higher rates for U.S.-based teams and advanced services like real-time streaming or complex integrations.

  • Align expertise: Verify experience with your required stack (e.g., React Native, TypeScript, serverless).
  • Review case studies: Look for measurable outcomes—load-time reductions, user growth, or revenue lifts.
  • Check communication style: Agile ceremonies, dedicated Slack channels, and transparent ticket tracking are green flags.
  • Validate cultural fit: Long-term projects thrive when collaboration styles and time zones mesh.
  • Compare total cost of ownership: Factor in maintenance, future scalability, and licensing—not just upfront build fees.

Shortlist 3-5 agencies on Clutch, schedule discovery calls, and request project roadmaps before signing an agreement.

  • Guaranteed timelines without discovery
  • No access to source code repositories during the engagement
  • Outdated tech stacks (e.g., jQuery-only solutions for modern SPAs)
  • Low developer retention or high turnover
  • Vague pricing models or hidden fees

If an agency dismisses code reviews, ignores testing, or refuses to provide client references, proceed with caution

  • Which JavaScript frameworks do you specialize in, and why?
  • Can you walk me through a recent project with similar complexity?
  • How do you ensure code quality—linting, peer reviews, automated tests?
  • What is your approach to scalability and performance optimization?
  • How will we communicate and track progress (tools, meeting cadence)?
  • Who owns the intellectual property and source code upon project completion?

Clear answers reveal an agency’s maturity, processes, and commitment to delivering long-term value.

A freelancer is ideal for small fixes or short-term enhancements, offering lower overhead and flexible hours. Agencies provide multidisciplinary teams including project managers, UI designers, and QA engineers capable of delivering end-to-end solutions and scaling resources quickly. While agencies cost more, they reduce single-point-of-failure risk and accelerate time-to-market for complex products. How do JavaScript firms measure ROI? Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.

Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.

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