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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: April 2, 2026
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15 Leaders 15 Contenders

21,848 Companies

Programming & Scripting: JavaScript

List of the Top JavaScript Development Companies

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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), specializes in Web Development, providing comprehensive services such as Front-End Development, Back-End Development, and Custom Website Development. Their reviews indicate a 100% satisfaction rate, highlighting their strong project management, technical expertise, and clear communication. Approximately 70% of reviewers emphasize their seamless integration into teams and high-quality deliverables.

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    6 of 6 JavaScript reviews are 5 stars
    1 new review for JavaScript in past 6 months
    $10,000 – $49,000 avg. project cost

    JavaScript Experience

    Digis has received overwhelmingly positive feedback for their JavaScript services, with 90% of clients noting effective communication and timely delivery. Clients have praised the expertise of their developers, particularly in frontend and full-stack development, contributing to improved project turnaround times by 40%-50%. Notable strengths include their ability to adapt to client needs, provide high-quality code, and offer innovative solutions without requiring micromanagement. Overall, there are no significant areas for improvement mentioned, indicating strong client satisfaction.

    Read Most Recent Review

    Average Project Cost Breakdown

    $10,000 to $49,000 (25) $50,000 to $199,999 (16) Less than $10,000 (8) $200,000 to $999,999 (6) $1,000,000 to $9,999,999 (4)

    What Clients Have Said

    Clients have consistently praised the company's cost-effectiveness and value for money. Many reviews note that Digis' pricing aligns well with client budgets while delivering high-quality work. For instance, one client highlighted that Digis offered 'good value for cost' and another mentioned a 'significant reduction in project turnaround time by 40%–50%.' Overall, the sentiment is overwhelmingly positive, with clients emphasizing their satisfaction with the quality of service relative to the investment made.
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    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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  • Six Digital Agency Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49
    Miramar, FL

    Services provided

    10% Web Development
    30% Web Design
    10% E-Commerce Development +10
    10% UX/UI Design
    7% Logo
    5% Architectural Design
    4% Content Marketing
    4% Conversion Optimization
    4% Digital Strategy
    4% Email Marketing
    4% Graphic Design
    4% Search Engine Optimization
    4% Social Media Marketing

    Focus Areas

    10% JavaScript
    70% PHP
    10% AJAX +1
    10% SQL

    Based in Miramar, Florida, Six Digital Agency is a web design company. Their services include Web Design and UX/UI Design.

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  • SII ROMANIA Logotype

    Not yet reviewed

    $100,000+
    $25 - $49 / hr
    250 - 999
    București, Romania

    Services provided

    10% Web Development
    40% IT Staff Augmentation
    15% Custom Software Development +6
    10% IT Managed Services
    5% Application Management & Support
    5% Application Testing
    5% CRM Consulting and SI
    5% Cloud Consulting & SI
    5% E-Commerce Development

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% Java +6
    15% C++
    10% C#
    10% PHP
    5% ASP
    5% C
    5% Objective C

    SII ROMANIA , an IT staff augmentation company, is based in București, Romania. Founded in 2009, the team offers IT staff augmentation and Custom Software Development.

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  • Xtreme Soft Solutions Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    10 - 49
    Keysborough, Australia

    Services provided

    10% Web Development
    30% E-Commerce Development
    20% DevOps Managed Services +3
    20% Mobile App Development
    10% Enterprise App Modernization
    10% Low/No Code Development

    Focus Areas

    15% JavaScript
    25% PHP
    25% Python +2
    25% SQL
    10% AJAX

    Xtreme Soft Solutions is a small e-commerce development firm launched in 2011. Their services include E-Commerce Development and Web Development.

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  • Support Wise Logotype

    Support Wise

    5.0 1 review
    $1,000+
    < $25 / hr
    10 - 49

    Services provided

    10% Web Development
    35% Call Center Services
    25% IT Managed Services +3
    10% AR/VR Development
    10% Back Office Outsourcing
    10% Other IT Consulting and SI

    Focus Areas

    18% JavaScript
    24% C++
    24% PHP +3
    18% Python
    10% SQL
    6% HTML5

    Support Wise provides comprehensive Web Development services, including POS system creation that enhances online business operations. Clients consistently praise their exceptional project management, punctuality, and responsiveness, highlighting their commitment to client satisfaction and alignment with company values. This professional approach has established Support Wise as a reliable partner for businesses seeking Web Design and Web Programming solutions.

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  • Apisys Technologies Logotype

    Apisys Technologies

    Not yet reviewed

    Undisclosed
    < $25 / hr
    10 - 49

    Services provided

    15% Web Development
    20% E-Commerce Development
    10% Graphic Design +8
    10% Low/No Code Development
    10% UX/UI Design
    10% Web Design
    5% Ecommerce Marketing
    5% Logo
    5% Pay Per Click
    5% Search Engine Optimization
    5% Social Media Marketing

    Focus Areas

    20% JavaScript
    50% PHP
    10% AJAX +2
    10% HTML5
    10% SQL

    Apisys Technologies is a website development firm. In Ghaziabad, India, the firm focuses on Web Development and E-Commerce Development.

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  • BRANDWIZ Logotype

    5.0 1 review
    $5,000+
    $200 - $300 / hr
    10 - 49
    Petah Tikva, Israel

    Services provided

    10% Web Development
    40% Branding
    20% Web Design +4
    10% Digital Strategy
    10% Graphic Design
    5% Corporate Photography
    5% UX/UI Design

    Focus Areas

    10% JavaScript
    25% ASP.NET
    20% PHP +4
    15% AJAX
    10% HTML5
    10% SQL
    10% XML

    BRANDWIZ specializes in the establishment and ongoing maintenance of websites, demonstrated by their work for non-profits such as the Israel Intelligence Heritage and Commemoration Center. Clients praise BRANDWIZ for their exceptional project management, timely delivery, and high-quality results, highlighting the team's strong communication skills and dedication to project success.

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  • Valcon systems Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    10 - 49
    Zlín, Czech Republic

    Services provided

    10% Web Development
    50% Custom Software Development
    10% Application Testing +3
    10% BI & Big Data Consulting & SI
    10% E-Commerce Development
    10% Other IT Consulting and SI

    Focus Areas

    10% JavaScript
    45% Java
    20% Typescript +5
    5% AJAX
    5% Kotlin
    5% Python
    5% Redux
    5% SQL

    Valcon systems is a software development company. In Zlín, Czech Republic, the company was launched in 2005. Their team provides Custom Software Development and BI & big data consulting & SI.

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  • Filin Solutions Logotype

    Filin Solutions

    5.0 1 review
    $5,000+
    $25 - $49 / hr
    10 - 49

    Services provided

    30% Web Development
    45% Mobile App Development
    10% Application Testing +3
    5% IoT Development
    5% UX/UI Design
    5% Wearable App Development

    Focus Areas

    10% JavaScript
    40% Kotlin
    40% Swift +1
    10% Go

    Filin Solutions specializes in developing mobile applications, particularly for startups aiming to create MVPs for investor presentations. The reviews highlight their ability to deliver cost-effective, functional apps within budget constraints and their proactive communication and adaptability to client needs. Clients appreciate their understanding of project goals and effective project management, making Filin Solutions a reliable partner for tech solutions.

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  • Bit Software Solutions Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49
    Dhaka, Bangladesh

    Services provided

    20% Web Development
    30% Mobile App Development
    15% Application Management & Support +4
    15% Custom Software Development
    10% Low/No Code Development
    5% Branding
    5% UX/UI Design

    Focus Areas

    20% JavaScript
    35% Redux
    20% SQL +4
    10% Java
    5% HTML5
    5% Other programming & scripting languages
    5% Typescript

    Bit Software Solutions, a mobile application development company, is headquartered in Dhaka, Bangladesh. Launched in 2018, the team provides Mobile App Development and Custom Software Development.

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  • Avarchar Technologies Pvt Ltd Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    10 - 49
    Thudiyalur, India

    Services provided

    20% Web Development
    20% CRM Consulting and SI
    20% Cloud Consulting & SI +2
    20% E-Commerce Development
    20% Mobile App Development

    Focus Areas

    20% JavaScript
    20% C#
    20% Java +2
    20% PHP
    20% Python

    Located in Thudiyalur, India, Avarchar Technologies Pvt Ltd is a cloud consulting & SI company. The team provides cloud consulting & SI and CRM consulting and SI.

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  • EVERSUME Logotype

    EVERSUME

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49

    Services provided

    25% Web Development
    20% Graphic Design
    20% Web Design +3
    15% E-Commerce Development
    10% Data Annotation Services
    10% Logo

    Focus Areas

    15% JavaScript
    20% PHP
    20% Python +3
    15% C
    15% C++
    15% Java

    Headquartered in COCHIN, India and Pathanamthitta, India, EVERSUME is a small website development company. Their services include Web Development and Web Design.

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  • Techforge Innovations Logotype

    Techforge Innovations

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Mobile App Development
    20% Search Engine Optimization +2
    20% Social Media Marketing
    20% UX/UI Design

    Focus Areas

    20% JavaScript
    20% Objective C
    20% PHP +2
    20% Python
    20% SQL

    Founded in 2024, Techforge Innovations is a small Karachi, Pakistan-based social media marketing agency. Their services include Social Media Marketing and Search Engine Optimization.

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  • Magercoding Digital Logotype

    Not yet reviewed

    $5,000+
    < $25 / hr
    10 - 49
    Banyumas, Indonesia

    Services provided

    30% Web Development
    40% Custom Software Development
    30% Search Engine Optimization

    Focus Areas

    10% JavaScript
    20% PHP
    20% Python +5
    10% Go
    10% HTML5
    10% SQL
    10% Typescript
    10% jquery

    Magercoding Digital is a software development company. They are located in Banyumas, Indonesia and have small team. They offer Custom Software Development and Search Engine Optimization.

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  • Design Dominion Logotype

    Design Dominion

    Not yet reviewed

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

    Services provided

    20% Web Development
    15% Web Design
    10% E-Commerce Development +6
    10% Graphic Design
    10% Logo
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    5% Content Writing Services

    Focus Areas

    20% JavaScript
    25% PHP
    25% Python +4
    10% C++
    10% HTML5
    5% C
    5% XML

    Design Dominion is a small website development company based in Aubrey, Texas. The team specializes in Web Development and Web Design.

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  • Walqalum Logotype

    5.0 1 review
    $25,000+
    $25 - $49 / hr
    10 - 49
    Lahore, Pakistan

    Services provided

    20% Web Development
    20% E-Commerce Development
    20% Mobile App Development +4
    10% Custom Software Development
    10% IT Strategy Consulting
    10% Low/No Code Development
    10% UX/UI Design

    Focus Areas

    20% JavaScript
    20% Java
    15% PHP +5
    15% Python
    10% Kotlin
    10% Redux
    5% Other programming & scripting languages
    5% SQL

    𝗪𝗮𝗹𝗤𝗮𝗹𝘂𝗺 is a top custom and dynamic Software Development company that has creatively operated within the international market of Web and mobile development since 2018. It is

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  • Comentum Logotype

    Not yet reviewed

    Undisclosed
    $150 - $199 / hr
    10 - 49
    San Diego, CA

    Services provided

    15% Web Development
    20% Custom Software Development
    15% Mobile App Development +5
    10% Branding
    10% Business Consulting
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Web Design

    Focus Areas

    15% JavaScript
    20% C#
    20% C++ +3
    15% Java
    15% PHP
    15% Python

    Comentum is a small San Diego, California-based software development firm. The team focuses on Custom Software Development and Web Development.

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  • Cypress North Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Buffalo, NY

    Services provided

    10% Web Development
    25% Pay Per Click
    10% Web Design +11
    5% BI & Big Data Consulting & SI
    5% Branding
    5% Conversion Optimization
    5% Custom Software Development
    5% Demand Generation Marketing
    5% Digital Strategy
    5% E-Commerce Development
    5% Ecommerce Marketing
    5% Graphic Design
    5% Search Engine Optimization
    5% UX/UI Design

    Focus Areas

    20% JavaScript
    35% PHP
    25% C# +2
    10% AJAX
    10% SQL

    Cypress North is a Buffalo, New York-based PPC agency. They provide Pay Per Click and Web Design and were launched in 2010.

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  • Infusion Pvt Ltd Logotype

    Infusion Pvt Ltd

    Not yet reviewed

    $1,000+
    Undisclosed
    10 - 49

    Services provided

    20% Web Development
    20% AR/VR Development
    20% Custom Software Development +2
    20% E-Commerce Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    35% Ember.js
    20% Kotlin +4
    10% HTML5
    10% PHP
    10% SQL
    5% jquery

    Infusion Pvt Ltd is a software development firm located in Kolkata, India. Founded in 2019, the team focuses on Custom Software Development and Web Development.

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  • 5280Devs Logotype

    5280Devs

    5.0 1 review
    Undisclosed
    $50 - $99 / hr
    2 - 9

    Services provided

    25% Web Development
    20% Web Design
    15% Branding +5
    10% E-Commerce Development
    10% Graphic Design
    10% Search Engine Optimization
    5% Email Marketing
    5% Social Media Marketing

    Focus Areas

    15% JavaScript
    45% HTML5
    25% PHP +2
    10% jquery
    5% XML

    At 5280Devs, we believe in the transformative power of the metaphysical and holistic realms. We understand that businesses and practitioners within these fields are driven by a deeper purpose –

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  • T-Minus Tech Solutions Private Limited Logotype

    T-Minus Tech Solutions Private Limited

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    20% AI Development
    20% API Development +2
    20% Custom Software Development
    20% E-Commerce Development

    Focus Areas

    20% JavaScript
    20% Go
    20% Python +2
    20% SQL
    20% Typescript

    T-Minus Tech Solutions Private Limited is a custom software development company located in Indore, India. Their services include Custom Software Development and Web Development.

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  • Symbility Intersect Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Toronto, Canada

    Services provided

    10% Web Development
    45% Mobile App Development
    27% UX/UI Design +2
    10% Application Management & Support
    8% Application Testing

    Focus Areas

    15% JavaScript
    33% Java
    33% Objective C +2
    15% Python
    4% Other programming & scripting languages

    Based in Toronto, Canada and Stuttgart, Germany, Symbility Intersect is a midsize mobile application development firm. The team specializes in Mobile App Development and UX/UI Design.

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  • Olympikesoft Logotype

    Olympikesoft

    Not yet reviewed

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

    Services provided

    10% Web Development
    25% Mobile App Development
    15% Low/No Code Development +6
    10% AR/VR Development
    10% Blockchain
    10% Custom Software Development
    10% E-Commerce Development
    5% Application Management & Support
    5% Wearable App Development

    Focus Areas

    24% JavaScript
    18% Redux
    12% PHP +6
    12% Typescript
    10% Kotlin
    6% AJAX
    6% ASP.NET
    6% C#
    6% Java

    Olympikesoft is an app development company. Founded in 2020, the firm specializes in Mobile App Development and Web Development.

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  • Abhi Bavishi Logotype

    5.0 1 review
    $5,000+
    $100 - $149 / hr
    Freelancer
    Gandhinagar, India

    Services provided

    10% Web Development
    25% Conversion Optimization
    25% Email Marketing +3
    20% CRM Consulting and SI
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    55% JavaScript
    25% Python
    20% Typescript

    I’m Abhi Bavishi, an engineer‑turned‑growth‑marketer with 13+ years designing revenue engines and cloud stacks for SaaS and tech startups. I step in as both CMO and CTO, giving

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  • Le Saint Logotype

    5.0 1 review
    $5,000+
    $100 - $149 / hr
    2 - 9
    Lac-Delage, Canada

    Services provided

    20% Web Development
    35% Branding
    20% Marketing Strategy +2
    15% Advertising
    10% AR/VR Development

    Focus Areas

    11% JavaScript
    12% PHP
    11% Ember.js +6
    11% Objective C
    11% Other programming & scripting languages
    11% Python
    11% Redux
    11% Swift
    11% Visual Basic

    Le Saint provides Website Development, Web Design, and related services. The overall feedback highlights their professionalism, creativity, and ability to deliver on time while effectively meeting client needs. Clients particularly appreciate Le Saint’s skill in combining creativity with a strong understanding of the client's vision, resulting in a coherent and attractive brand identity.

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  • Infutive Technology Pvt. Ltd. Logotype

    Infutive Technology Pvt. Ltd.

    Not yet reviewed

    Undisclosed
    < $25 / hr
    10 - 49

    Services provided

    10% Web Development
    10% Content Writing Services
    10% Digital Strategy +8
    10% E-Commerce Development
    10% Mobile App Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Web Design
    5% Ecommerce Marketing
    5% Graphic Design

    Focus Areas

    13% JavaScript
    13% Ember.js
    13% Other programming & scripting languages +5
    13% Python
    13% Ruby
    13% Swift
    12% Kotlin
    10% Objective C

    Digital Strategy company Infutive Technology Pvt. Ltd. Was founded in 2017. In , the team focuses on Digital Strategy and Social Media Marketing.

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  • Websignal Logotype

    Websignal

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    2 - 9

    Services provided

    20% Web Development
    15% Branding
    15% E-Commerce Development +11
    7% Advertising
    6% Social Media Marketing
    5% Custom Software Development
    5% Graphic Design
    5% Logo
    5% Packaging Design
    5% Print Design
    4% Digital Strategy
    4% Search Engine Optimization
    3% Marketing Strategy
    1% Mobile App Development

    Focus Areas

    22% JavaScript
    22% PHP
    22% Python +6
    12% AJAX
    12% Ember.js
    5% Ruby
    2% C++
    2% Java
    1% ASP

    Website development firm Websignal is located in Târgu Mureș, Romania. The team provides Web Development and Branding.

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  • Global Matrix Solution Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    10 - 49
    Meerut, India

    Services provided

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

    Focus Areas

    16% JavaScript
    16% PHP
    15% AJAX +7
    15% SQL
    8% HTML5
    8% jquery
    7% Typescript
    7% XML
    4% Other programming & scripting languages
    4% Rust

    Global Matrix Solution is a Digital Strategy company launched in 2019. The firm offers Digital Strategy and Web Design.

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  • Beatnik Technology Limited Logotype

    5.0 1 review
    Undisclosed
    Undisclosed
    10 - 49
    Dhaka, Bangladesh

    Services provided

    15% Web Development
    20% Digital Engineering
    20% Mobile App Development +3
    20% UX/UI Design
    15% Web Design
    10% Cloud Consulting & SI

    Focus Areas

    10% JavaScript
    15% Kotlin
    15% Objective C +5
    15% SQL
    15% Swift
    10% HTML5
    10% Java
    10% PHP

    Established in 2017, Beatnik Technology is a leading provider of comprehensive digital solutions, headquartered in Dhaka, Bangladesh. We specialize in app development, UX/UI design, web development,

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  • ClonifyNow Logotype

    ClonifyNow

    5.0 1 review
    $5,000+
    $25 - $49 / hr
    50 - 249

    Services provided

    20% Web Development
    20% Application Testing
    20% E-Commerce Development +3
    20% Mobile App Development
    10% Custom Software Development
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    10% C
    10% C++ +7
    10% HTML5
    10% Java
    10% Objective C
    10% PHP
    10% Python
    10% SQL
    10% jquery

    Experience the power of on-demand clone app development with ClonifyNow. We are a leading provider of customizable, feature-rich clone apps that replicate the success of popular platforms like Uber

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  • Moneycore Smart Logotype

    4.5 1 review
    $5,000+
    $25 - $49 / hr
    50 - 249
    Colombes, France

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Cybersecurity +2
    20% IT Staff Augmentation
    20% IT Strategy Consulting

    Focus Areas

    10% JavaScript
    10% AJAX
    10% Java +7
    10% Kotlin
    10% Objective C
    10% Python
    10% Redux
    10% Typescript
    10% Visual Basic
    10% XML

    Moneycore Smart is a global technology and digital transformation company dedicated to helping businesses build modern, scalable and intelligent solutions. Headquartered in France with operating

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  • Softclain Technologies Private Limited Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    50 - 249
    Piravom, India

    Services provided

    10% Web Development
    20% Mobile App Development
    15% Custom Software Development +29
    10% AR/VR Development
    10% E-Commerce Development
    5% Business Consulting
    2% AI Development
    2% Mobile & App Marketing
    2% UX/UI Design
    2% Web Design
    1% Application Management & Support
    1% Application Testing
    1% BI & Big Data Consulting & SI
    1% CRM Consulting and SI
    1% Cloud Consulting & SI
    1% Content Marketing
    1% Cybersecurity
    1% Digital Strategy
    1% ERP Consulting and SI
    1% Email Marketing
    1% Enterprise App Modernization
    1% Graphic Design
    1% IT Managed Services
    1% IT Staff Augmentation
    1% IT Strategy Consulting
    1% Other Application Development
    1% Other Digital Marketing
    1% Other IT Consulting and SI
    1% Pay Per Click
    1% Product Design
    1% Search Engine Optimization
    1% Social Media Marketing

    Focus Areas

    11% JavaScript
    21% Java
    11% PHP +11
    11% Python
    11% SQL
    5% ASP.NET
    5% C#
    5% Kotlin
    5% Objective C
    5% Swift
    5% Visual Basic
    2% Redux
    2% Ruby
    1% C++

    Based in Piravom, India and London, Canada, Softclain Technologies Private Limited is a midsize app development company. The team provides Mobile App Development and Custom Software Development.

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  • On Demand Biz Logotype

    On Demand Biz

    Not yet reviewed

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

    Services provided

    15% Web Development
    15% AI Agents
    15% Mobile App Development +10
    10% AI Development
    5% AI Consulting
    5% Business Consulting
    5% Content Writing Services
    5% Corporate Training & Coaching
    5% Generative AI
    5% Low/No Code Development
    5% Search Engine Optimization
    5% Social Media Marketing
    5% UX/UI Design

    Focus Areas

    10% JavaScript
    15% AJAX
    15% Other programming & scripting languages +6
    10% Ember.js
    10% Objective C
    10% PHP
    10% SQL
    10% Swift
    10% Visual Basic

    On Demand Biz is a web development firm. The Jaipur, India-based firm was launched in 2020. Their services include Web Development and Mobile App Development.

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  • VISIONS Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    50 - 249
    Chandigarh, India

    Services provided

    20% Web Development
    30% Web Design
    20% E-Commerce Development +2
    20% Search Engine Optimization
    10% Mobile App Development

    Focus Areas

    10% JavaScript
    10% ASP
    10% ASP.NET +9
    10% Java
    10% Objective C
    10% PHP
    10% SQL
    10% Swift
    5% Other programming & scripting languages
    5% Ruby
    5% Visual Basic
    5% XML

    Established in 1993, VISIONS is a web design company. Their services include Web Design and E-Commerce Development.

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  • Xomox Technology Pvt. Ltd. Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    50 - 249
    Durgapur, India

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Graphic Design +2
    20% Mobile App Development
    20% Web Design

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP +7
    10% ASP.NET
    10% C++
    10% Java
    10% PHP
    10% Ruby
    10% SQL
    10% XML

    Xomox Technology Pvt. Ltd. Is a Durgapur, India-based software development company. The team specializes in Custom Software Development and Graphic Design.

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  • JS Web Dev Ltd. Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    Freelancer
    Earls Colne, England

    Services provided

    60% Web Development
    15% E-Commerce Development
    10% Search Engine Optimization +3
    5% Pay Per Click
    5% UX/UI Design
    5% Web Design

    Focus Areas

    10% JavaScript
    70% PHP
    10% AJAX +2
    5% SQL
    5% XML

    Headquartered in Earls Colne, England and England, JS Web Dev Ltd. Is a website development company. Their services include Web Development and E-Commerce Development.

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  • iSatisfy.com Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    Freelancer
    Miami Beach, FL

    Services provided

    20% Web Development
    10% Business Consulting
    10% Content Marketing +6
    10% Digital Strategy
    10% E-Commerce Development
    10% Email Marketing
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

    40% JavaScript
    60% PHP

    Web development firm iSatisfy.com was founded in 1999. In Miami Beach, Florida, the team provides Web Development and Content Marketing.

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  • Qtonix Software Pvt Ltd Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    30% Search Engine Optimization
    20% Web Design +4
    10% E-Commerce Development
    10% Mobile App Development
    10% Pay Per Click
    10% Social Media Marketing

    Focus Areas

    20% JavaScript
    30% PHP
    10% AJAX +4
    10% C++
    10% Python
    10% SQL
    10% Visual Basic

    SEO agency Qtonix Software Pvt Ltd was founded in 2012. Based in Bhubaneswar, India, the team specializes in Search Engine Optimization and Web Design.

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  • Adactin Group Pty. Ltd. Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Parramatta, Australia

    Services provided

    15% Web Development
    20% Custom Software Development
    15% AI Development +4
    15% Blockchain
    15% IoT Development
    10% BI & Big Data Consulting & SI
    10% IT Strategy Consulting

    Focus Areas

    15% JavaScript
    20% Python
    15% Java +4
    15% PHP
    15% Perl
    10% C#
    10% C++

    Adactin Group Pty. Ltd., a software development firm, is located in Parramatta, Australia. Established in 2011, the team specializes in Custom Software Development and Artificial Intelligence.

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  • ITCurves Logotype

    Not yet reviewed

    $5,000+
    $200 - $300 / hr
    50 - 249
    Lahore, Pakistan

    Services provided

    20% Web Development
    20% Application Testing
    20% Mobile App Development +4
    10% CRM Consulting and SI
    10% Custom Software Development
    10% Low/No Code Development
    10% UX/UI Design

    Focus Areas

    10% JavaScript
    20% SQL
    15% PHP +5
    15% Redux
    15% Ruby
    10% Other programming & scripting languages
    10% Python
    5% Java

    ITCurves is a custom software development company. Established in 2010, the company focuses on Custom Software Development and Web Development.

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  • Wordpress Buddha Logotype

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    Freelancer
    Jacksonville, FL

    Services provided

    70% Web Development
    30% Web Design

    Focus Areas

    10% JavaScript
    70% PHP
    15% HTML5 +1
    5% Perl

    Wordpress Buddha is a web development company. The Jacksonville, Florida-based company was established in 2006. Their team offers Web Development and Web Design.

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  • SWDEF Logotype

    SWDEF

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% Custom Software Development
    10% AI Development +4
    10% Application Management & Support
    10% IoT Development
    10% Mobile App Development
    10% Other Application Development

    Focus Areas

    20% JavaScript
    20% PHP
    20% Python +3
    20% SQL
    10% HTML5
    10% Kotlin

    SWDEF is a midsize custom software development company headquartered in. The team offers Custom Software Development and Web Development.

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  • https://salasarcybersolutions.com/ Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    50 - 249
    Indore, India

    Services provided

    10% Web Development
    10% Content Marketing
    10% Custom Software Development +7
    10% E-Commerce Development
    10% IT Staff Augmentation
    10% Low/No Code Development
    10% Mobile App Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

    20% JavaScript
    20% Java
    20% Other programming & scripting languages +4
    10% Kotlin
    10% PHP
    10% Python
    10% Ruby

    Headquartered in Indore, India, https://salasarcybersolutions.com/ is a social media marketing firm. Founded in 2016, the team specializes in Social Media Marketing and Content Marketing.

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  • SiliconMint Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Services provided

    20% Web Development
    20% AR/VR Development
    20% Application Management & Support +2
    20% Custom Software Development
    20% Enterprise App Modernization

    Focus Areas

    10% JavaScript
    60% C++
    10% C# +2
    10% Go
    10% Java

    SiliconMint is a San Francisco, California-based software development firm. Launched in 2012, the team focuses on Custom Software Development and Web Development.

    Read more
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  • Think Digitally Logotype

    Not yet reviewed

    $25,000+
    $25 - $49 / hr
    50 - 249
    London, England

    Services provided

    20% Web Development
    15% Custom Software Development
    14% Low/No Code Development +9
    10% IT Staff Augmentation
    10% Mobile App Development
    5% Application Testing
    5% Architectural Design
    5% DevOps Managed Services
    5% IT Strategy Consulting
    5% Product Design
    5% UX/UI Design
    1% Web Design

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP.NET +7
    10% C#
    10% C++
    10% HTML5
    10% SQL
    10% Scala
    10% Typescript
    10% jquery

    Launched in 2011, Think Digitally is a midsize London, England-based custom software development company. Their services include Custom Software Development and Web Development.

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  • Gislen Software Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    50 - 249
    Chennai, India

    Services provided

    20% Web Development
    20% Custom Software Development
    20% E-Commerce Development +2
    20% IoT Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    30% C#
    15% SQL +5
    15% Typescript
    10% HTML5
    10% Python
    5% C++
    5% jquery

    Gislen Software is a custom software development firm established in 1994. Their team specializes in Custom Software Development and Web Development.

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  • Just Pointblank Logotype

    Just Pointblank

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Web Design
    20% Mobile App Development +3
    10% Branding
    10% Graphic Design
    10% UX/UI Design

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C +7
    10% C#
    10% C++
    10% Java
    10% Objective C
    10% PHP
    10% Python
    10% SQL

    Just Pointblank is a web design company. Founded in 2011, the company is located in Cape Town, South Africa. Their team provides Web Design and Web Development.

    Read more
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  • Dinnova AG Logotype

    Dinnova AG

    Not yet reviewed

    $10,000+
    Undisclosed
    50 - 249

    Services provided

    20% Web Development
    20% AI Development
    20% Custom Software Development +2
    20% E-Commerce Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    10% HTML5
    10% Java +7
    10% Kotlin
    10% Other programming & scripting languages
    10% PHP
    10% SQL
    10% Swift
    10% Typescript
    10% jquery

    Dinnova AG is a software development firm. Founded in 2020, their team offers Custom Software Development and Web Development.

    Read more
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  • Southside CHI Solutions Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Chicago, IL

    Services provided

    13% Web Development
    20% Cloud Consulting & SI
    15% Cybersecurity +4
    13% Custom Software Development
    13% IT Managed Services
    13% IT Strategy Consulting
    13% Mobile App Development

    Focus Areas

    35% JavaScript
    40% Python
    25% PHP

    Southside CHI Solutions is a cloud consulting & SI company. The small Chicago, Illinois-based team focuses on cloud consulting & SI and Cybersecurity. The company was founded in 2023.

    Read more
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  • Chill Web Designs Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    Freelancer
    Great Yarmouth, England

    Services provided

    40% Web Development
    25% Web Design
    20% Graphic Design +1
    15% Search Engine Optimization

    Focus Areas

    15% JavaScript
    55% PHP
    15% AJAX +1
    15% SQL

    Chill Web Designs is a web development company. The Great Yarmouth, England-based agency specializes in Web Development and Web Design.

    Read more
    View Profile
  • Steve Perry Creative Logotype

    Not yet reviewed

    $10,000+
    $150 - $199 / hr
    Freelancer
    Brown Edge, England

    Services provided

    30% Web Development
    30% E-Commerce Development
    30% Web Design +1
    10% UX/UI Design

    Focus Areas

    25% JavaScript
    50% Other programming & scripting languages
    25% PHP

    Steve Perry Creative is a small e-commerce development firm founded in 1990. Their team focuses on E-Commerce Development and Web Design.

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We evaluate service providers using a structured methodology that combines:

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This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.

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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 xfive
2 ImageX
3 Brainhub
4 ATEAM SOFT SOLUTIONS
5 The Software House
6 Xmartlabs
7 Airdev
8 WPWeb Infotech
9 Lizard Global
10 Softonix
11 INOXOFT
12 PopArt Studio
13 GeekyAnts
14 Incora
15 SpdLoad

List of the Top 15 JavaScript Development Companies

  1. xfive Logotype

    xfive

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

    Ability to deliver

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

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  2. 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
  3. Brainhub Logotype

    Brainhub

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

    Ability to deliver

    39.5/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    45% Web Development
    75% JavaScript
    55% Other
    View Profile Visit Website
  4. ATEAM SOFT SOLUTIONS Logotype

    ATEAM SOFT SOLUTIONS

    $10,000+
    < $25 / hr
    250 - 999
    Thiruvananthapuram, India

    Ability to deliver

    38.5/40.0
    19.2/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

    50% Web Development
    50% JavaScript
    50% Other
    View Profile Visit Website
  5. 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
  6. 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
  7. Airdev Logotype

    Airdev

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

    Ability to deliver

    38.7/40.0
    19.4/20 Reviews
    9.6/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  8. 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
  9. 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
  10. Softonix Logotype

    Softonix

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

    Ability to deliver

    36.5/40.0
    17.6/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

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

    INOXOFT

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

    Ability to deliver

    39.8/40.0
    19.8/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  12. 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
  13. 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
  14. Incora Logotype

    Incora

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

    Ability to deliver

    37.6/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  15. SpdLoad Logotype

    SpdLoad

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

    Ability to deliver

    36.8/40.0
    17/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    45% Web Development
    50% JavaScript
    55% Other
    View Profile Visit Website
  16. Brainium Information Technologies Logotype

    Brainium Information Technologies

    $10,000+
    < $25 / hr
    250 - 999
    Kolkata, India

    Ability to deliver

    36.7/40.0
    19.4/20 Reviews
    9/10 Clients & Experience
    8.4/10 Market Presence

    Service focus

    35% Web Development
    30% JavaScript
    65% Other
    View Profile Visit Website
  17. Toptal Logotype

    Toptal

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

    Ability to deliver

    38.7/40.0
    18.8/20 Reviews
    9.9/10 Clients & Experience
    10/10 Market Presence

    Service focus

    15% Web Development
    25% JavaScript
    85% Other
    View Profile Visit Website
  18. 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
  20. 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
  21. 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
  22. Experion Technologies Logotype

    Experion Technologies

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

    Ability to deliver

    36.9/40.0
    17.2/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% Other
    View Profile Visit Website
  23. Scopic Logotype

    Scopic

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

    Ability to deliver

    38.7/40.0
    19/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    25% Web Development
    25% JavaScript
    75% Other
    View Profile Visit Website
  24. 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
  25. 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
  26. 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
  27. Blazity Logotype

    Blazity

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

    Ability to deliver

    37.3/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9.2/10 Market Presence

    Service focus

    50% Web Development
    70% JavaScript
    50% Other
    View Profile Visit Website
  28. Sigma Software Group Logotype

    Sigma Software Group

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

    Ability to deliver

    38/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    21% Web Development
    18% JavaScript
    79% Other
    View Profile Visit Website
  29. Vangwe Logotype

    Vangwe

    $10,000+
    $50 - $99 / hr
    10 - 49
    Montevideo, Uruguay

    Ability to deliver

    38.3/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  30. 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

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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