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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: March 31, 2026
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15 Leaders 15 Contenders

21,832 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.

    See all 89 projects

    Reviews mention Well-executed projects

    Clients consistently praise Digis for executing projects exceptionally well. One CEO highlighted their effective staffing, noting the excellent performance of developers who improved code quality and eliminated bugs, leading to a significant reduction in app store complaints. The thoroughness and conscientiousness of the QA tester were also commended. Overall, the sentiment reflects high satisfaction with Digis' ability to deliver quality work and maintain clear communication throughout the project.
    • Development Resources Recruitment for Social Networking Firm
      5.0 Oct 27, 2022

      Both the developer and tester have exceeded expectations. Their performance is excellent. Together they eliminated bugs, introduced new features, and ensured that the app is working without problems. Previously, we had many complaints in the app store. Since working with this developer and tester, these complaints about the app functioning and bugs have disappeared.

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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
    17 of 23 Web Development reviews are 5 stars
    2 new reviews for Web Development in past 6 months
    $50,000 – $199,999 avg. project cost

    Web Development PROJECT HIGHLIGHT

    Hosting Platform Development for Advertising & Marketing Co

    4.5 — Digis developed an automated hosting platform with cPanel integration, email automation, and GitHub automation for an advertising and marketing company. Read more
    Read 23 Reviews

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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)
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  • nadeem.tech Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    Freelancer
    عمّان, Jordan

    Services provided

    15% Web Development
    70% Search Engine Optimization
    15% Content Marketing

    Focus Areas

    20% JavaScript
    50% Python
    30% PHP

    Located in عمّان, Jordan, nadeem.tech is a SEO agency. They focus on Search Engine Optimization and Content Marketing.

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  • Sk Developers Logotype

    Sk Developers

    Not yet reviewed

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

    Services provided

    25% Web Development
    25% Graphic Design
    25% Search Engine Optimization +2
    15% Web Design
    10% Low/No Code Development

    Focus Areas

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

    Launched in 2020, Sk Developers is a small SEO company located in Lahore, Pakistan. Their team specializes in Search Engine Optimization and Web Design.

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  • DataPro USA LLC Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer
    Scottsdale, AZ

    Services provided

    20% Web Development
    20% Branding
    20% Search Engine Optimization +3
    20% Web Design
    10% E-Commerce Development
    10% UX/UI Design

    Focus Areas

    15% JavaScript
    15% HTML5
    15% PHP +6
    15% jquery
    10% Python
    10% SQL
    10% Swift
    5% ASP.NET
    5% Ruby

    DataPro USA LLC, a branding company, specializes in Branding and Search Engine Optimization. The company is located in Scottsdale, Arizona.

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  • Matrix Media Logotype

    Not yet reviewed

    $1,000+
    < $25 / hr
    Freelancer
    Johannesburg, South Africa

    Services provided

    20% Web Development
    20% E-Commerce Development
    20% Graphic Design +2
    20% Social Media Marketing
    20% Web Design

    Focus Areas

    15% JavaScript
    30% HTML5
    15% PHP +4
    10% SQL
    10% Typescript
    10% XML
    10% jquery

    Matrix Media is a social media marketing agency. Headquartered in Johannesburg, South Africa, their small team offers Social Media Marketing and Web Design. The agency was launched in 2015.

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  • Max Degterev Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    Freelancer
    Greven, Germany

    Services provided

    25% Web Development
    15% Mobile App Development
    10% API Development +5
    10% Business Consulting
    10% Corporate Training & Coaching
    10% Custom Software Development
    10% E-Commerce Development
    10% UX/UI Design

    Focus Areas

    10% JavaScript
    90% Typescript

    Max Degterev is a small website development company established in 2021. Their team offers Web Development and Mobile App Development.

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  • Flow Design Logotype

    Flow Design

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    Freelancer

    Services provided

    25% Web Development
    25% E-Commerce Development
    25% Low/No Code Development +1
    25% Other Application Development

    Focus Areas

    10% JavaScript
    75% jquery
    15% HTML5

    Flow Design, a website development company, is in Multan, Pakistan. The team offers Web Development and E-Commerce Development.

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  • SUTISH TECH SOLUTIONS Logotype

    Not yet reviewed

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

    Services provided

    15% Web Development
    25% Mobile App Development
    10% AR/VR Development +8
    10% IoT Development
    10% Low/No Code Development
    5% AI Development
    5% Blockchain
    5% Branding
    5% E-Commerce Development
    5% Search Engine Optimization
    5% Social Media Marketing

    Focus Areas

    11% JavaScript
    11% ASP.NET
    11% Typescript +13
    7% Kotlin
    5% AJAX
    5% C++
    5% Ember.js
    5% Objective C
    5% PHP
    5% Python
    5% Redux
    5% Ruby
    5% SQL
    5% Swift
    5% Visual Basic
    5% XML

    SUTISH TECH SOLUTIONS is a website development company. They were launched in 2018 and focus on Web Development and Mobile App Development.

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  • LACONICS Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    10 - 49
    Tirana, Albania

    Services provided

    10% Web Development
    20% Business Consulting
    20% IT Strategy Consulting +4
    20% UX/UI Design
    10% AR/VR Development
    10% Low/No Code Development
    10% Mobile App Development

    Focus Areas

    16% JavaScript
    16% PHP
    11% Kotlin +7
    11% Python
    11% Redux
    11% SQL
    11% Swift
    5% Ember.js
    5% Perl
    3% AJAX

    User experience company LACONICS was founded in 2020. The small team specializes in UX/UI Design and IT strategy consulting.

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  • Craxet Logotype

    Craxet

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49

    Services provided

    15% Web Development
    35% Mobile App Development
    30% UX/UI Design +2
    10% AR/VR Development
    10% Low/No Code Development

    Focus Areas

    11% JavaScript
    16% Typescript
    11% HTML5 +8
    11% Java
    11% PHP
    11% SQL
    11% Swift
    5% ASP.NET
    5% C#
    5% Visual Basic
    3% Kotlin

    Founded in 2019, Craxet is an app development company. Their services include Mobile App Development and UX/UI Design.

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  • Zylen Solutions Pvt. Ltd., Logotype

    Zylen Solutions Pvt. Ltd.,

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% API Development
    10% AR/VR Development +15
    10% Custom Software Development
    10% Low/No Code Development
    10% Mobile App Development
    5% Application Management & Support
    5% Cloud Consulting & SI
    5% DevOps Managed Services
    5% E-Commerce Development
    5% Enterprise App Modernization
    5% Microservices Architecture Services
    2% Application Testing
    2% CRM Consulting and SI
    2% ERP Consulting and SI
    2% IT Staff Augmentation
    1% BI & Big Data Consulting & SI
    1% Other Application Development

    Focus Areas

    16% JavaScript
    11% ASP.NET
    11% Other programming & scripting languages +17
    5% AJAX
    5% HTML5
    5% Kotlin
    5% Objective C
    5% Redux
    5% SQL
    5% Swift
    5% Typescript
    5% jquery
    3% backbone.js
    2% Ember.js
    2% Java
    2% PHP
    2% Perl
    2% Python
    2% Ruby
    2% Visual Basic

    Zylen Solutions Pvt. Ltd., is a software development firm launched in 2018. Headquartered in Chennai, India, the team offers Custom Software Development and Web Development.

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  • Infinitio Consulting Inc. Logotype

    Infinitio Consulting Inc.

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    10 - 49

    Services provided

    10% Web Development
    15% Branding
    12% Low/No Code Development +11
    10% AR/VR Development
    10% Digital Strategy
    10% IT Strategy Consulting
    10% Logo
    5% Content Marketing
    5% Print Design
    5% Search Engine Optimization
    5% Social Media Marketing
    1% Mobile App Development
    1% UX/UI Design
    1% Web Design

    Focus Areas

    16% JavaScript
    16% PHP
    16% Python +7
    16% SQL
    11% jquery
    5% ASP.NET
    5% Apex
    5% HTML5
    5% Java
    5% XML

    Infinitio Consulting Inc., a branding company, is headquartered in Morden, Canada. The team specializes in Branding and Digital Strategy.

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  • Mohstechnologies Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    10 - 49
    Milford Mill, MD

    Services provided

    10% Web Development
    20% Logo
    20% Social Media Marketing +4
    20% UX/UI Design
    10% AR/VR Development
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    16% JavaScript
    21% Python
    20% HTML5 +4
    16% PHP
    11% Java
    11% jquery
    5% Ember.js

    Based in Milford Mill, Maryland, Mohstechnologies is a social media marketing agency. Their services include Social Media Marketing and Web Design.

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  • ITProLab Logotype

    ITProLab

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

    Services provided

    15% Web Development
    40% Custom Software Development
    20% API Development +2
    15% Blockchain
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    60% Go
    10% HTML5 +4
    5% C
    5% Objective C
    5% SQL
    5% Swift

    ITProLab offers comprehensive services in Website Development, Web Design, and Web Programming, specializing in cryptocurrency solutions. The reviews commend ITProLab for their innovative problem-solving, exceptional customer service, and ability to deliver high-quality, user-friendly platforms on time. Clients particularly appreciate their strong project management and proactive communication throughout the project lifecycle.

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  • Nessim Works Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Gaithersburg, MD

    Services provided

    10% Web Development
    10% AI Consulting
    10% AI Development +10
    10% Mobile App Development
    10% Search Engine Optimization
    10% UX/UI Design
    10% Web Design
    5% Compliance Consulting
    5% Content Writing Services
    5% Document Digitization & Management
    5% Enterprise App Modernization
    5% Generative AI
    5% Other Application Development

    Focus Areas

    10% JavaScript
    70% ColdFusion
    10% ASP.NET +2
    5% PHP
    5% Python

    Nessim Works, a SEO services firm, provide Search Engine Optimization and Web Design. They were founded in 2020.

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  • Corewex Logotype

    Corewex

    Not yet reviewed

    Undisclosed
    < $25 / hr
    Freelancer

    Services provided

    15% Web Development
    15% E-Commerce Development
    15% Mobile App Development +9
    10% API Development
    10% IT Managed Services
    5% Application Management & Support
    5% Custom Software Development
    5% Cybersecurity
    5% Mobile & App Marketing
    5% Other Application Development
    5% Search Engine Optimization
    5% Social Media Marketing

    Focus Areas

    28% JavaScript
    50% Delphi
    10% PHP +2
    10% SQL
    2% Redux

    Launched in 2022, Corewex is a website development company. The agency offers Web Development and Mobile App Development, and is small.

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  • nicodelabs Logotype

    nicodelabs

    5.0 3 reviews
    $1,000+
    $25 - $49 / hr
    2 - 9

    Services provided

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

    Focus Areas

    15% JavaScript
    20% PHP
    15% AJAX +5
    10% HTML5
    10% SQL
    10% Swift
    10% XML
    10% jquery

    At Nicodelabs, we specialize in crafting custom software solutions, dynamic websites, and intuitive mobile applications that drive success. Our team of expert developers and designers is dedicated

    Read more
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  • Couve Creative Logotype

    5.0 1 review
    $1,000+
    $50 - $99 / hr
    2 - 9
    Vancouver, WA

    Services provided

    20% Web Development
    20% Digital Strategy
    20% Ecommerce Marketing +3
    20% Mobile App Development
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    10% JavaScript
    30% PHP
    15% SQL +4
    15% Swift
    10% HTML5
    10% Redux
    10% Ruby

    We are a solutions-oriented web development agency in Vancouver, WA, specializing in WordPress, Shopify, and React frameworks for custom portals, e-commerce, and small business websites. We maximize

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  • ArfBlue Logotype

    5.0 1 review
    $1,000+
    $25 - $49 / hr
    2 - 9
    Marrakech, Morocco

    Services provided

    20% Web Development
    20% Graphic Design
    20% Pay Per Click +2
    20% Search Engine Optimization
    20% Social Media Marketing

    Focus Areas

    10% JavaScript
    50% HTML5
    10% Java +3
    10% PHP
    10% SQL
    10% XML

    is a creative agency specializing in tailor-made digital solutions for ambitious businesses. Rooted in innovation, strategy, and execution, our mission is to help our clients grow online and

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  • Codynex LLC Logotype

    5.0 1 review
    $1,000+
    $25 - $49 / hr
    2 - 9
    Katy, TX

    Services provided

    20% Web Development
    20% AI Agents
    20% AI Consulting +2
    20% AI Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C +7
    10% C#
    10% Go
    10% HTML5
    10% Java
    10% SQL
    10% Swift
    10% Typescript

    Codynex is a Houston-based technology company specializing in AI-powered software development, cloud solutions, and digital automation for small and mid-sized businesses. We combine strong

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  • ADAPTIVE DEVELOPMENT PRIVATE LIMITED Logotype

    ADAPTIVE DEVELOPMENT PRIVATE LIMITED

    5.0 1 review
    $10,000+
    $50 - $99 / hr
    2 - 9

    Services provided

    10% Web Development
    10% AI Agents
    10% AI Development +7
    10% API Development
    10% Application Testing
    10% Custom Software Development
    10% Enterprise App Modernization
    10% Generative AI
    10% Microservices Architecture Services
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    20% HTML5
    20% SQL +2
    20% Typescript
    20% jquery

    Adaptive Development Private Limited (ADPL) is a technology consulting and enterprise software engineering company based in India. The company was incorporated in 2024 to expand international

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  • Moaice Pvt. Ltd. Logotype

    5.0 2 reviews
    $1,000+
    $25 - $49 / hr
    2 - 9
    Islamabad, Pakistan

    Services provided

    20% Web Development
    30% Custom Software Development
    15% Mobile App Development +4
    10% E-Commerce Development
    10% IoT Development
    10% Other Application Development
    5% AI Development

    Focus Areas

    10% JavaScript
    40% Python
    20% Java +3
    20% SQL
    5% C#
    5% C++

    Moaice Pvt. Ltd. provides services in UI design, smart contract development on Ethereum, and machine learning applications for trading algorithms. Clients have praised the company for their effective project management, timely delivery, secure smart contract development, clear communication, and high-quality work. Moaice Pvt. Ltd. is recommended for their professionalism and impressive results.

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  • Devlinko Logotype

    5.0 1 review
    $1,000+
    $25 - $49 / hr
    2 - 9
    Burton upon Trent, England

    Services provided

    10% Web Development
    30% E-Commerce Development
    20% Conversion Optimization +3
    20% Search Engine Optimization
    10% Low/No Code Development
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    20% HTML5
    20% PHP +2
    20% Ruby
    20% SQL

    Devlinko specializes in Shopify store redesign, focusing on creating sleek, user-friendly designs that align with brand identity while integrating essential features. The overall feedback highlights their effective project management, timely delivery, and professional demeanor, resulting in increased website traffic, conversion rates, and sales performance. Devlinko is praised for offering good value for cost and maintaining a positive attitude throughout the collaboration.

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  • Propellex Logotype

    Propellex

    5.0 1 review
    $1,000+
    < $25 / hr
    2 - 9

    Services provided

    10% Web Development
    10% Content Marketing
    10% Conversion Optimization +7
    10% Digital Strategy
    10% E-Commerce Development
    10% Ecommerce Marketing
    10% Email Marketing
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

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

    Propellex provides Website Development and Web Design services, as demonstrated by their work with Spartan Tax Group. Reviews highlight their strong project management, timely delivery, attention to detail, and creative approach, which collectively contribute to exceeding client expectations.

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  • Pexel Path Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% CRM Consulting and SI
    20% Custom Software Development +2
    20% E-Commerce Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    50% PHP
    20% Apex +3
    10% Java
    5% Python
    5% SQL

    Pexel Path is a custom software development firm founded in 2020. The team focuses on Custom Software Development and CRM consulting and SI.

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  • BasilByte Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% BI & Big Data Consulting & SI
    20% IT Strategy Consulting +2
    20% IoT Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    20% C
    20% C++ +4
    20% Perl
    10% AJAX
    10% Java
    10% Python

    BasilByte is a big data company. Headquartered in New Delhi, India, their team offers BI & big data consulting & SI and IoT development.

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  • Itrix Computer Services Pvt Ltd Logotype

    Itrix Computer Services Pvt Ltd

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    10% Application Management & Support +5
    10% Application Testing
    10% E-Commerce Development
    10% Enterprise App Modernization
    10% IoT Development
    10% Mobile App Development

    Focus Areas

    10% JavaScript
    40% Java
    20% SQL +3
    10% AJAX
    10% PHP
    10% XML

    In , Itrix Computer Services Pvt Ltd is a small software development firm. Their services include Custom Software Development and Web Development.

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  • SkyBox Logotype

    SkyBox

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% UX/UI Design
    20% Web Design +3
    15% E-Commerce Development
    15% Mobile App Development
    10% Blockchain

    Focus Areas

    10% JavaScript
    10% C#
    10% C++ +7
    10% Java
    10% Objective C
    10% PHP
    10% Python
    10% Ruby
    10% SQL
    10% Swift

    Founded in 2017, SkyBox is an UX design company. The firm specializes in UX/UI Design and Web Design, and is small.

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  • MODAFA Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9
    Yaoundé, Cameroon

    Services provided

    20% Web Development
    30% Custom Software Development
    20% Mobile App Development +3
    15% IT Managed Services
    10% Enterprise App Modernization
    5% ERP Consulting and SI

    Focus Areas

    10% JavaScript
    40% Java
    15% PHP +4
    10% ASP.NET
    10% Python
    10% SQL
    5% C#

    MODAFA is a custom software development firm established in 2018. The firm focuses on Custom Software Development and Mobile App Development.

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  • High Wheel Software Logotype

    High Wheel Software

    Not yet reviewed

    $10,000+
    $25 - $49 / hr
    2 - 9

    Services provided

    20% Web Development
    50% Custom Software Development
    20% BI & Big Data Consulting & SI +1
    10% Application Management & Support

    Focus Areas

    10% JavaScript
    30% SQL
    20% ASP.NET +2
    20% C#
    20% Python

    High Wheel Software is a custom software development firm. They focus on Custom Software Development and BI & big data consulting & SI and were launched in 2017.

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  • American Appworks, LLC Logotype

    American Appworks, LLC

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Application Testing
    20% Custom Software Development +2
    20% Enterprise App Modernization
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP +8
    10% ASP.NET
    10% C#
    10% PHP
    10% Redux
    10% SQL
    10% Visual Basic
    5% Python
    5% Swift

    American Appworks, LLC, a software development firm, is headquartered in. The team focuses on Custom Software Development and Enterprise App Modernization.

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  • Towerlogic Logotype

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    2 - 9
    Pointe-Claire, Canada

    Services provided

    20% Web Development
    20% Application Management & Support
    20% Custom Software Development +2
    20% Enterprise App Modernization
    20% IT Strategy Consulting

    Focus Areas

    10% JavaScript
    50% Java
    10% C +3
    10% C++
    10% PHP
    10% SQL

    Towerlogic is a Pointe-Claire, Canada-based custom software development company. The team provides Custom Software Development and Enterprise App Modernization.

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  • Dinotail Logotype

    Dinotail

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Content Marketing
    10% Digital Strategy +7
    10% E-Commerce Development
    10% Mobile App Development
    10% Product Design
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% ASP.NET
    20% PHP +3
    20% SQL
    10% AJAX
    10% Kotlin

    Dinotail is an user experience design company. Their small team is located in Mumbai, India and offers UX/UI Design and Content Marketing. The agency was established in 2019.

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  • Bro. Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Konak, Türkiye

    Services provided

    20% Web Development
    40% UX/UI Design
    30% Mobile App Development +1
    10% Branding

    Focus Areas

    10% JavaScript
    20% PHP
    15% Swift +6
    10% ASP.NET
    10% Python
    10% Redux
    10% Ruby
    10% SQL
    5% Java

    Bro. Is a small UX company. They specialize in UX/UI Design and Mobile App Development and were established in 2016.

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  • Hoffentech Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Buenos Aires, Argentina

    Services provided

    20% Web Development
    20% AI Development
    20% Business Consulting +4
    15% AI Consulting
    10% Mobile App Development
    10% Web Design
    5% UX/UI Design

    Focus Areas

    10% JavaScript
    30% Python
    25% PHP +2
    25% SQL
    10% Java

    Hoffentech is a small website development firm. They offer Web Development and Artificial Intelligence and were launched in 2010.

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  • Clipcil Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    2 - 9
    İzmir, Türkiye

    Services provided

    20% Web Development
    20% AI Development
    15% Mobile App Development +5
    10% Corporate Training & Coaching
    10% Custom Software Development
    10% UX/UI Design
    10% Web Design
    5% Product Design

    Focus Areas

    10% JavaScript
    30% ASP.NET
    30% C# +3
    15% SQL
    10% Python
    5% Java

    Clipcil is an AI firm. The team is headquartered in İzmir, Türkiye, and their services include Artificial Intelligence and Web Development.

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  • Jurmp Logotype

    Not yet reviewed

    $25,000+
    $200 - $300 / hr
    2 - 9
    Lekki, Nigeria

    Services provided

    10% Web Development
    20% Branding
    15% Web Design +11
    10% Custom Software Development
    10% Product Design
    5% Digital Strategy
    5% E-Commerce Development
    5% Graphic Design
    5% Mobile App Development
    5% Search Engine Optimization
    5% UX/UI Design
    2% IT Strategy Consulting
    2% Mobile & App Marketing
    1% Logo

    Focus Areas

    20% JavaScript
    15% HTML5
    15% Other programming & scripting languages +4
    15% PHP
    15% jquery
    10% AJAX
    10% Typescript

    Launched in 2019, Jurmp is a small branding agency. Their services include Branding and Web Design.

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  • Derivative Research Systems Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    2 - 9
    Wauwatosa, WI

    Services provided

    20% Web Development
    80% Custom Software Development

    Focus Areas

    10% JavaScript
    60% Java
    15% C++ +2
    10% Objective C
    5% Typescript

    Derivative Research Systems is a software development firm. They were launched in 1995, and their services include Custom Software Development and Web Development.

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  • Memorelab Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    70% AI Development
    20% Custom Software Development

    Focus Areas

    20% JavaScript
    50% Python
    10% Java +2
    10% Kotlin
    10% SQL

    Memorelab, an AI firm, was founded in 2015. The small team provides Artificial Intelligence and Custom Software Development.

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  • Zwerit Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    2 - 9
    Sofia, Bulgaria

    Services provided

    10% Web Development
    15% Other Application Development
    10% API Development +7
    10% Custom Software Development
    10% DevOps Managed Services
    10% ERP Consulting and SI
    10% IT Managed Services
    10% IT Strategy Consulting
    10% Microservices Architecture Services
    5% Application Testing

    Focus Areas

    20% JavaScript
    20% Typescript
    10% ASP.NET +7
    10% C#
    10% Other programming & scripting languages
    10% Python
    5% PHP
    5% Rust
    5% SQL
    5% jquery

    Established in 2013, Zwerit is an Other Application Development company. The team offers Other Application Development and IT strategy consulting.

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  • Epic Design Labs Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% UX/UI Design
    20% Web Design +3
    10% E-Commerce Development
    10% Mobile App Development
    10% Wearable App Development

    Focus Areas

    20% JavaScript
    20% Redux
    20% SQL +2
    20% Swift
    20% Typescript

    Epic Design Labs is an UX company launched in 2019. The firm offers UX/UI Design and Web Design.

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  • Emusoft Inc Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Custom Software Development
    15% Enterprise App Modernization +6
    10% Application Testing
    5% Application Management & Support
    5% Cloud Consulting & SI
    5% IT Managed Services
    5% IT Staff Augmentation
    5% Web Design

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +9
    10% C++
    10% Go
    10% PHP
    10% Python
    10% Typescript
    5% Java
    5% Objective C
    5% Redux
    5% SQL

    Emusoft Inc is a software development firm. They were established in 2005, and their services include Custom Software Development and Web Development.

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  • Apollo Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% AI Development
    30% Custom Software Development +2
    10% IoT Development
    10% Other Application Development

    Focus Areas

    10% JavaScript
    40% Python
    30% C++ +2
    10% C
    10% SQL

    Apollo is a software development company. The company is based in Kyiv, Ukraine. Their team focuses on Custom Software Development and Artificial Intelligence.

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  • EBS WebProject - Website design agency Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9
    Dubai, United Arab Emirates

    Services provided

    20% Web Development
    20% Custom Software Development
    20% E-Commerce Development +3
    20% Web Design
    10% Application Management & Support
    10% Other Application Development

    Focus Areas

    10% JavaScript
    40% Delphi
    20% SQL +3
    10% AJAX
    10% Go
    10% PHP

    EBS WebProject - Website design agency is a web design company founded in 2001. The company offers Web Design and Custom Software Development.

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  • Datanet Studio Pte Ltd Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% Custom Software Development
    20% Enterprise App Modernization +3
    10% AI Development
    10% Logistics & Supply Chain Consulting
    10% Other Application Development

    Focus Areas

    20% JavaScript
    20% C#
    20% Python +3
    20% SQL
    10% C
    10% C++

    Datanet Studio Pte Ltd is a custom software development firm. The Singapore, Singapore-based agency focuses on Custom Software Development and Enterprise App Modernization.

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  • Hyper Kodes Technologies Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    20% E-Commerce Development +11
    10% Mobile App Development
    5% Logo
    5% Other Application Development
    5% UX/UI Design
    5% Web Design
    3% Affiliate Marketing
    2% AI Development
    2% Application Management & Support
    1% Digital Strategy
    1% Graphic Design
    1% Pay Per Click

    Focus Areas

    10% JavaScript
    20% Kotlin
    20% PHP +6
    20% SQL
    10% AJAX
    5% ASP.NET
    5% Java
    5% Python
    5% XML

    Hyper Kodes Technologies is a software development firm. Founded in 2021, the team focuses on Custom Software Development and Web Development. The company is located in Karachi, Pakistan.

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  • eBera IT Consulting Logotype

    Not yet reviewed

    $10,000+
    $25 - $49 / hr
    2 - 9
    Sundbyberg, Sweden

    Services provided

    20% Web Development
    25% IT Staff Augmentation
    20% Custom Software Development +3
    20% E-Commerce Development
    10% Mobile App Development
    5% Enterprise App Modernization

    Focus Areas

    10% JavaScript
    10% C#
    10% C++ +7
    10% Java
    10% Kotlin
    10% PHP
    10% Python
    10% Ruby
    10% Swift
    10% Typescript

    EBera IT Consulting is an IT staff augmentation company. Their team is headquartered in Sundbyberg, Sweden and Pristina, Kosovo. The firm offers IT staff augmentation and Custom Software

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  • FibiWorks Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Custom Software Development
    20% Cloud Consulting & SI +3
    10% Cybersecurity
    10% IT Managed Services
    10% IT Strategy Consulting

    Focus Areas

    10% JavaScript
    30% Java
    30% Python +2
    20% Go
    10% Kotlin

    FibiWorks is a software development firm. Their small team of employees is in Brno, Czech Republic. Their team focuses on Custom Software Development and cloud consulting & SI.

    Read more
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  • A-TECH Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% AI Development
    10% Application Management & Support +7
    10% Blockchain
    10% Custom Software Development
    10% E-Commerce Development
    10% IT Strategy Consulting
    10% Mobile App Development
    10% Other Application Development
    10% Wearable App Development

    Focus Areas

    20% JavaScript
    25% Typescript
    15% Python +4
    15% Redux
    10% C++
    10% Java
    5% SQL

    Established in 2021, A-TECH is a small Amman, Jordan-based IT strategy consulting company. Their services include IT strategy consulting and Custom Software Development.

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  • Deepfai Inc. Logotype

    Not yet reviewed

    $25,000+
    $50 - $99 / hr
    2 - 9
    Naperville, IL

    Services provided

    10% Web Development
    15% AI Development
    15% E-Commerce Development +7
    10% AR/VR Development
    10% Application Management & Support
    10% Cloud Consulting & SI
    10% Custom Software Development
    10% Enterprise App Modernization
    5% Application Testing
    5% Mobile App Development

    Focus Areas

    20% JavaScript
    20% Java
    10% XML +6
    5% PHP
    5% Python
    5% Redux
    5% SQL
    4% AJAX
    1% Typescript

    Deepfai Inc. Is an e-commerce development firm. Established in 2021, the team focuses on E-Commerce Development and Artificial Intelligence. The company is headquartered in Naperville, Illinois.

    Read more
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  • NetConsultiv Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    2 - 9
    Gronau (Leine), Germany

    Services provided

    10% Web Development
    25% E-Commerce Development
    15% Conversion Optimization +7
    15% UX/UI Design
    10% Web Design
    5% Branding
    5% Digital Strategy
    5% IT Strategy Consulting
    5% Market Research
    5% Marketing Strategy

    Focus Areas

    20% JavaScript
    20% AJAX
    20% Other programming & scripting languages +2
    20% PHP
    20% SQL

    NetConsultiv is an e-commerce development company. The team is located in Gronau (Leine), Germany, and their services include E-Commerce Development and Conversion Optimization.

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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. 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
  24. 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
  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. 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
  27. Oshyn Logotype

    Oshyn

    $25,000+
    $100 - $149 / hr
    50 - 249
    Cypress, CA

    Ability to deliver

    36.4/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    8.2/10 Market Presence

    Service focus

    100% Web Development
    40% JavaScript
    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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