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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: February 8, 2026
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15 Leaders 15 Contenders

21,635 Companies

Programming & Scripting: JavaScript

List of the Top JavaScript Development Companies

  • Featured

    What are Featured Providers?

    Digis, a Fiverr company (NYSE: FVRR) Logotype

    Digis, a Fiverr company (NYSE: FVRR)

    4.9 88 reviews
    Premier Verified
    $5,000+
    $25 - $49 / hr
    50 - 249
    London, England

    Services provided

    50% Web Development
    50% Custom Software Development

    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), excels in providing comprehensive web development and staff augmentation services. With a focus on custom website development, front-end and back-end development, they consistently deliver high-quality projects, demonstrating 100% positive feedback for their technical expertise and effective project management. Clients frequently highlight their reliability and seamless integration into existing teams, with 80% mentioning their exceptional communication skills and adaptability.

    See all 88 projects

    Reviews mention Team players

    Clients consistently describe Digis as a team player, integrating seamlessly into their teams. For instance, the CEO of VisitDays noted that their Digis teammate was considered a vital member of their team from day one. Similarly, the CTO of GrapeData emphasized the developers as integral contributors who communicated effectively and were responsive to needs. Overall, the sentiment is overwhelmingly positive, highlighting Digis' commitment to collaboration and adaptability in various project environments.
    • IT Staff Aug & Software Dev for EdTech Company
      5.0 Apr 19, 2024

      Our teammate from Digis is incredibly valuable and from day one we have considered him a member of our team. Digis is incredibly hands-on with their project management, and it really does feel like they are an extension of our team.

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    • Dashboard & App Dev for Online Jewelry Media Business
      4.5 Aug 6, 2020

      Digis work as an extension of our team; there is a strong understanding of our business and culture. We work with a common approach to challenge the norm and achieve the impossible.

      Read Full Review
    • Analytics for Transportation Company
      4.5 Mar 23, 2020

      The workflow was effective as we brought the individuals over to our offices for two weeks to onboard to the team. I feel that the two individuals are team players on one hand, and are able to work remotely from the core team on the other hand. They are communicative when they are stuck, which is very helpful.

      Read Full Review
    • Dev of Cloud-Based SaaS CRM System
      5.0 Jul 28, 2017

      While they do a good job as a software company, I also like Do IT’s ability to act as a part of the team. They’re not simply committing hours, but also try to understand what our request is, and why we would or wouldn’t need a particular part.

      Read Full Review
    Read All Reviews
    16 of 22 Web Development reviews are 5 stars
    1 new review 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 22 Reviews

    Average Project Cost Breakdown

    $10,000 to $49,000 (24) $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

    Client feedback on Digis highlights a strong sentiment regarding cost-effectiveness and value for money. Many clients noted that Digis offered competitive pricing while delivering quality work, with comments like "pricing fit our budget" and "good value for cost". Clients appreciated the alignment of company values, effective communication, and timely delivery, suggesting a reliable partnership. Overall, Digis is perceived as a cost-effective solution that meets client expectations without compromising on quality.
    Read All Reviews

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    United States (28) 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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  • Universal Equations, Inc. Logotype

    Universal Equations, Inc.

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    10% Low/No Code Development +8
    10% Robotics Process Automation
    10% Web Design
    5% Blockchain
    5% Cloud Consulting & SI
    5% Cybersecurity
    5% IT Managed Services
    5% IT Strategy Consulting
    5% Mobile App Development

    Focus Areas

    25% JavaScript
    30% Scala
    25% Java +1
    20% SQL

    Established in 2016, Universal Equations, Inc. Is a web design company. Their team provides Web Design and Custom Software Development.

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  • Creative UI Design LLC Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Ahmedabad, India

    Services provided

    10% Web Development
    80% UX/UI Design
    5% Custom Software Development +1
    5% Mobile App Development

    Focus Areas

    35% JavaScript
    35% PHP
    30% HTML5

    Creative UI Design LLC is an user experience agency. Their small team is based in Ahmedabad, India and focuses on UX/UI Design and Web Development. The agency was established in 2022.

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  • Nextio Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Bratislava, Slovakia

    Services provided

    25% Web Development
    25% UX/UI Design
    15% Custom Software Development +3
    15% Web Design
    10% Low/No Code Development
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    25% HTML5
    20% PHP +4
    10% AJAX
    10% SQL
    10% Typescript
    5% Other programming & scripting languages

    Nextio is an user experience design company. Their small team of employees is headquartered in Bratislava, Slovakia. Their team offers UX/UI Design and Web Development.

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  • ReductStore Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Hamburg, Germany

    Services provided

    20% Web Development
    20% AI Consulting
    20% Cloud Consulting & SI +3
    20% Digital Engineering
    10% AR/VR Development
    10% Custom Software Development

    Focus Areas

    25% JavaScript
    25% C++
    25% Python +1
    25% Rust

    ReductStore is a cloud consulting & SI company. They focus on cloud consulting & SI and Web Development and are headquartered in Hamburg, Germany.

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  • WSI Digital Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Prudenville, MI

    Services provided

    30% Web Development
    15% AI Consulting
    10% Digital Strategy +9
    5% Advertising
    5% Business Consulting
    5% Content Marketing
    5% Email Marketing
    5% Marketing Strategy
    5% Pay Per Click
    5% Search Engine Optimization
    5% Social Media Marketing
    5% Video Marketing

    Focus Areas

    15% JavaScript
    65% HTML5
    20% Other programming & scripting languages

    WSI Digital is a Prudenville, Michigan-based website development firm. They focus on Web Development and AI Consulting and were founded in 2007.

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  • Nolwa Private Limited Logotype

    5.0 1 review
    $1,000+
    $100 - $149 / hr
    10 - 49
    Kozhikode, India

    Services provided

    10% Web Development
    10% Application Management & Support
    10% Custom Software Development +7
    10% Direct Marketing
    10% E-Commerce Development
    10% Mobile App Development
    10% Other Application Development
    10% UX/UI Design
    10% Wearable App Development
    10% Web Design

    Focus Areas

    30% JavaScript
    40% PHP
    10% AJAX +2
    10% SQL
    10% XML

    Nolwa Private Limited offers Website Development and Web Design services, demonstrating expertise in delivering digital transformation solutions. Reviews highlight their effective project management, cost efficiency, and responsive support team, showcasing a strong commitment to client satisfaction and innovative solutions.

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  • Coderz Vision Technology Logotype

    4.5 1 review
    $25,000+
    $25 - $49 / hr
    10 - 49
    Chennai, India

    Services provided

    10% Web Development
    15% E-Commerce Development
    15% IoT Development +5
    15% Mobile App Development
    15% UX/UI Design
    10% Custom Software Development
    10% Digital Strategy
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% HTML5 +7
    10% Java
    10% Other programming & scripting languages
    10% PHP
    10% Python
    10% SQL
    10% Swift
    10% Visual Basic

    Coderz Vision Technology specializes in Website Development and Web Design, delivering projects with a clean look and feel. Reviews highlight the company's customer-centric approach, timely delivery, and effective project management. Clients appreciate their smooth execution and the team's consistent support and guidance throughout the development process.

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  • Lodestone App Logotype

    Not yet reviewed

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

    Services provided

    25% Web Development
    20% Web Design
    15% Blockchain +3
    15% Custom Software Development
    15% Search Engine Optimization
    10% Branding

    Focus Areas

    15% JavaScript
    25% PHP
    15% Other programming & scripting languages +6
    15% Python
    10% Ruby
    5% Go
    5% Java
    5% Redux
    5% XML

    Lodestone App is a small website development firm in Madurai, India. Their services include Web Development and Web Design.

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  • Vkart Info Solutions Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% Custom Software Development
    15% Web Design +4
    10% E-Commerce Development
    10% Mobile App Development
    10% UX/UI Design
    5% Graphic Design

    Focus Areas

    30% JavaScript
    30% PHP
    30% SQL +1
    10% AJAX

    Vkart Info Solutions is a custom software development firm based in Mumbai, India. The team provides Custom Software Development and Web Design.

    Read more
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  • New Way Infotech Private Limited Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% CRM Consulting and SI
    20% E-Commerce Development +3
    10% Custom Software Development
    10% IT Managed Services
    10% IT Strategy Consulting

    Focus Areas

    30% JavaScript
    60% PHP
    10% Other programming & scripting languages

    New Way Infotech Private Limited is a CRM consulting and SI company. Based in Lucknow, India, their team provides CRM consulting and SI and E-Commerce Development.

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  • MediaG Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% Pay Per Click
    10% E-Commerce Development +12
    10% Web Design
    5% Advertising
    5% Branding
    5% Commercial Development
    5% Commercial Property Management
    5% Conversion Optimization
    5% Digital Strategy
    5% Marketing Strategy
    5% Mobile & App Marketing
    5% Mobile App Development
    5% Search Engine Optimization
    5% Social Media Marketing

    Focus Areas

    30% JavaScript
    50% PHP
    10% AJAX +1
    10% ASP.NET

    MediaG is a PPC company established in 2019. The team focuses on Pay Per Click and Web Design.

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  • Software SOEFE S.A. Logotype

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    10 - 49
    Tres Rios, Costa Rica

    Services provided

    20% Web Development
    20% Application Management & Support
    20% Custom Software Development +2
    20% E-Commerce Development
    20% Mobile App Development

    Focus Areas

    20% JavaScript
    20% Objective C
    10% C# +5
    10% Java
    10% PHP
    10% SQL
    10% Visual Basic
    10% XML

    Software SOEFE S.A. Is a software development firm. Based in Tres Rios, Costa Rica, their team specializes in Custom Software Development and Application Management & Support.

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  • WebOrbit Informatics Ltd. Logotype

    Not yet reviewed

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

    Services provided

    30% Web Development
    60% Custom Software Development
    10% Mobile App Development

    Focus Areas

    10% JavaScript
    20% PHP
    20% Ruby +3
    20% SQL
    20% Typescript
    10% Python

    WebOrbit Informatics Ltd. Is a software development company. They are located in Szeged, Hungary and have small team. They offer Custom Software Development and Web Development.

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  • Flevio Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% CRM Consulting and SI
    10% Custom Software Development +7
    10% E-Commerce Development
    10% Graphic Design
    10% Mobile App Development
    10% Social Media Marketing
    10% Video Production
    10% Wearable App Development
    10% Web Design

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP.NET +7
    10% Kotlin
    10% Other programming & scripting languages
    10% PHP
    10% Python
    10% Ruby
    10% Swift
    10% Visual Basic

    Flevio is a social media marketing firm in Boston, Massachusetts and Red Hill, Australia. Established in 2015, the team focuses on Social Media Marketing and Web Design.

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  • Renedes Logotype

    Renedes

    Not yet reviewed

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

    Services provided

    25% Web Development
    25% Mobile App Development
    20% Digital Strategy +3
    20% Recruiting
    5% Custom Software Development
    5% Search Engine Optimization

    Focus Areas

    15% JavaScript
    20% HTML5
    20% PHP +4
    15% SQL
    10% Kotlin
    10% Objective C
    10% Typescript

    Launched in 2018, Renedes is a web development company. The company provides Web Development and Mobile App Development, and is small.

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  • Digital Squad Division Logotype

    Digital Squad Division

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49

    Services provided

    10% Web Development
    10% Branding
    10% Content Marketing +7
    10% Content Moderation Services
    10% Digital Strategy
    10% Email Marketing
    10% Graphic Design
    10% Marketing Strategy
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

    13% JavaScript
    13% C#
    13% C++ +5
    13% Java
    13% Objective C
    13% Redux
    12% Visual Basic
    10% AJAX

    Digital Squad Division is a branding firm. The team specializes in Branding and Marketing Strategy, and the agency is based in Giza, Egypt.

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  • Usual Software Company Logotype

    Not yet reviewed

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

    Services provided

    15% Web Development
    25% AI Development
    25% Cloud Consulting & SI +2
    25% IT Strategy Consulting
    10% AR/VR Development

    Focus Areas

    13% JavaScript
    13% Ember.js
    13% Other programming & scripting languages +5
    13% Python
    13% Typescript
    13% Visual Basic
    12% PHP
    10% Objective C

    Usual Software Company is an IT strategy consulting company. Founded in 2019, their team offers IT strategy consulting and cloud consulting & SI.

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  • Advanced Millennium Technologies Logotype

    Not yet reviewed

    $10,000+
    < $25 / hr
    50 - 249
    Bengaluru, India

    Services provided

    10% Web Development
    15% Custom Software Development
    10% Application Management & Support +7
    10% Application Testing
    10% Business Consulting
    10% Financial Consulting
    10% IoT Development
    10% Mobile App Development
    10% Unified Communications Consulting & SI
    5% ERP Consulting and SI

    Focus Areas

    20% JavaScript
    20% ASP.NET
    20% Java +4
    10% Go
    10% Kotlin
    10% SQL
    10% Swift

    Software development firm Advanced Millennium Technologies offers Custom Software Development and Application Management & Support. They were founded in 2002.

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  • RipeConcepts, INC. Logotype

    RipeConcepts, INC.

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    50 - 249

    Services provided

    20% Web Development
    30% Back Office Outsourcing
    20% E-Commerce Development +2
    20% IT Strategy Consulting
    10% CRM Consulting and SI

    Focus Areas

    10% JavaScript
    20% Apex
    10% ASP +6
    10% ASP.NET
    10% Java
    10% PHP
    10% Perl
    10% Ruby
    10% SQL

    RipeConcepts, INC. Is a Back Office Outsourcing company. They specialize in Back Office Outsourcing and E-Commerce Development and were established in 2009.

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  • Bitcoin Exchange & Blockchain Development Company Logotype

    Bitcoin Exchange & Blockchain Development Company

    Not yet reviewed

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

    Services provided

    10% Web Development
    30% Direct Marketing
    30% Search Engine Optimization +3
    10% IT Strategy Consulting
    10% Mobile App Development
    10% UX/UI Design

    Focus Areas

    20% JavaScript
    40% PHP
    20% AJAX +2
    10% ASP
    10% Java

    Bitcoin Exchange & Blockchain Development Company is a SEO agency located in. Their services include Search Engine Optimization and Direct Marketing.

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  • SuccessAmp LLC Logotype

    Not yet reviewed

    $1,000+
    $200 - $300 / hr
    2 - 9
    Kentwood, MI

    Services provided

    10% Web Development
    25% Search Engine Optimization
    20% Pay Per Click +4
    15% Conversion Optimization
    10% Content Marketing
    10% Digital Strategy
    10% Web Design

    Focus Areas

    20% JavaScript
    50% PHP
    10% AJAX +3
    10% SQL
    5% HTML5
    5% Python

    SuccessAmp LLC is a small SEO agency founded in 2008. Their team specializes in Search Engine Optimization and Pay Per Click.

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  • ZSTRONICS Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    2 - 9
    Lahore, Pakistan

    Services provided

    15% Web Development
    25% Mobile App Development
    20% API Development +4
    10% Application Testing
    10% DevOps Managed Services
    10% Low/No Code Development
    10% UX/UI Design

    Focus Areas

    30% JavaScript
    30% Kotlin
    20% Typescript +2
    10% Redux
    10% Swift

    ZSTRONICS is a website development firm. Established in 2022, the firm is in Lahore, Pakistan. Their team specializes in Web Development and Mobile App Development.

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  • Blooms Web Logotype

    Blooms Web

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

    Services provided

    10% Web Development
    20% E-Commerce Development
    20% Pay Per Click +3
    20% Search Engine Optimization
    20% Social Media Marketing
    10% Low/No Code Development

    Focus Areas

    20% JavaScript
    25% Other programming & scripting languages
    20% PHP +2
    20% Python
    15% HTML5

    Blooms Web specializes in ecommerce store development, including website redesign, product addition, SEO optimization, and integration of payment and shipping methods. The overall feedback highlights their good project management, timely delivery, and dedicated customer support. However, there is a suggestion to improve their process efficiency and adoption of the latest technology tools.

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  • TableFlow Tech Private Limited Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% E-Commerce Development
    20% Mobile App Development +3
    20% UX/UI Design
    10% Custom Software Development
    10% Low/No Code Development

    Focus Areas

    25% JavaScript
    25% ASP.NET
    25% C# +1
    25% Other programming & scripting languages

    TableFlow Tech Private Limited, an user experience agency, is based in Ahmedabad, India. The team focuses on UX/UI Design and Custom Software Development.

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  • Al Misbah Informatique Logotype

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

    Services provided

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

    Focus Areas

    10% JavaScript
    40% PHP
    10% AJAX +4
    10% Java
    10% Kotlin
    10% SQL
    10% Swift

    Al Misbah Informatique specializes in Website Development and Web Programming, offering tailored solutions such as custom CRM systems and mobile applications. Reviews highlight their professionalism, effective communication, and ability to deliver comprehensive web solutions that exceed client expectations. The team is praised for its availability and expertise, ensuring successful project outcomes.

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  • WeKanCode Logotype

    Not yet reviewed

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

    Services provided

    30% Web Development
    35% Mobile App Development
    25% Custom Software Development +1
    10% AR/VR Development

    Focus Areas

    10% JavaScript
    10% C#
    10% Java +11
    10% Objective C
    10% PHP
    10% Swift
    5% ASP
    5% ASP.NET
    5% Apex
    5% C
    5% C++
    5% Python
    5% Ruby
    5% SQL

    WeKanCode is an app development company. Founded in 2015, the team provides Mobile App Development and Web Development.

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  • Affity Solutions Pvt. Ltd Logotype

    Affity Solutions Pvt. Ltd

    Not yet reviewed

    $50,000+
    $25 - $49 / hr
    10 - 49

    Services provided

    20% Web Development
    20% Application Management & Support
    20% E-Commerce Development +3
    20% Mobile App Development
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% Java
    20% Objective C +3
    20% PHP
    10% SQL
    10% XML

    Founded in 2014, Affity Solutions Pvt. Ltd is a small Application Management & Support company. Their team offers Application Management & Support and E-Commerce Development.

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  • Love Agency Logotype

    Not yet reviewed

    $100,000+
    $150 - $199 / hr
    10 - 49
    Sydney, Australia

    Services provided

    20% Web Development
    35% Mobile App Development
    25% UX/UI Design +1
    20% Web Design

    Focus Areas

    20% JavaScript
    20% Java
    20% Objective C +2
    20% Ruby
    20% Swift

    Love Agency is an application development firm. Founded in 2008, the team specializes in Mobile App Development and UX/UI Design. The company is located in Sydney, Australia.

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  • Zingbytes It Solutions Logotype

    Zingbytes It Solutions

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    30% PHP
    30% Swift +2
    20% Objective C
    10% Java

    Zingbytes It Solutions is a mobile application development firm. The agency is located in Indore , India. Their services include Mobile App Development and Web Development.

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  • Media Mechanic Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    10 - 49
    Lake Oswego, OR

    Services provided

    25% Web Development
    30% Web Design
    25% Mobile App Development +1
    20% Search Engine Optimization

    Focus Areas

    15% JavaScript
    15% AJAX
    15% Java +4
    15% Python
    15% SQL
    15% Swift
    10% Other programming & scripting languages

    Media Mechanic is a web design company. The team specializes in Web Design and Mobile App Development, and the company is in Lake Oswego, Oregon.

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  • Spinbox Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    10 - 49
    Milton Keynes, England

    Services provided

    20% Web Development
    20% Application Management & Support
    20% Custom Software Development +4
    10% E-Commerce Development
    10% IT Strategy Consulting
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    25% ASP.NET
    25% C# +3
    10% AJAX
    10% SQL
    10% Typescript

    Launched in 2007, Spinbox is a software development company. The team provides Custom Software Development and Web Development.

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  • Lorentus Ltd. Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% Custom Software Development
    30% Mobile App Development +3
    10% E-Commerce Development
    5% Application Testing
    5% UX/UI Design

    Focus Areas

    30% JavaScript
    30% Java
    30% Swift +1
    10% PHP

    Lorentus Ltd. Is a custom software development firm. The Sutton, England-based company was founded in 2014. Their services include Custom Software Development and Mobile App Development.

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  • SEO Era Logotype

    SEO Era

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49

    Services provided

    20% Web Development
    30% Search Engine Optimization
    30% Web Design +1
    20% Mobile App Development

    Focus Areas

    20% JavaScript
    30% PHP
    30% SQL +2
    15% AJAX
    5% Other programming & scripting languages

    SEO Era is a SEO company. Located in , the team specializes in Search Engine Optimization and Web Design.

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  • Montel Intergalactic Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    50% Cloud Consulting & SI
    30% Custom Software Development +1
    10% Mobile App Development

    Focus Areas

    30% JavaScript
    40% Python
    20% SQL +1
    10% Ruby

    Montel Intergalactic is a cloud consulting & SI company. They offer cloud consulting & SI and Custom Software Development and are located in Helsinki, Finland and Neuquen, Argentina.

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  • Cybermax Solutions Logotype

    Not yet reviewed

    $5,000+
    < $25 / hr
    10 - 49
    Mumbai, India

    Services provided

    30% Web Development
    30% Custom Software Development
    20% Application Management & Support +1
    20% Email Marketing

    Focus Areas

    10% JavaScript
    30% PHP
    25% ASP.NET +3
    20% C#
    10% SQL
    5% ASP

    Cybermax Solutions is a custom software development firm. The team is in Mumbai, India, and their services include Custom Software Development and Web Development.

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  • Unplugged Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Giza, Egypt

    Services provided

    20% Web Development
    25% UX/UI Design
    25% Web Design +2
    20% Mobile App Development
    10% E-Commerce Development

    Focus Areas

    20% JavaScript
    80% PHP

    Unplugged is an UX design agency. They are in Giza, Egypt and have small team of experts. Their services include UX/UI Design and Web Design.

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  • iMAS Logotype

    iMAS

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Blockchain
    20% Custom Software Development +2
    20% Mobile App Development
    20% Product Design

    Focus Areas

    20% JavaScript
    20% Other programming & scripting languages
    20% PHP +2
    20% Swift
    20% XML

    IMAS, a custom software development company, is based in Vilnius, Lithuania. The team specializes in Custom Software Development and Blockchain.

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  • Black Snow Agency Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    40% Social Media Marketing
    20% Digital Strategy +2
    10% Custom Software Development
    10% Search Engine Optimization

    Focus Areas

    20% JavaScript
    70% PHP
    5% AJAX +1
    5% HTML5

    Black Snow Agency, a social media marketing agency, is headquartered in Sandton, South Africa and Cape Town, South Africa. Their services include Social Media Marketing and Digital Strategy.

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  • Acuminous Software Pvt Ltd Logotype

    Acuminous Software Pvt Ltd

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Application Testing
    20% Custom Software Development +4
    10% Application Management & Support
    10% E-Commerce Development
    10% Enterprise App Modernization
    10% Mobile App Development

    Focus Areas

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

    Software development company Acuminous Software Pvt Ltd was founded in 2010. The agency provides Custom Software Development and Application Testing.

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  • Bowst Logotype

    Not yet reviewed

    $50,000+
    $150 - $199 / hr
    10 - 49
    Portsmouth, NH

    Services provided

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

    Focus Areas

    20% JavaScript
    30% Other programming & scripting languages
    30% Python +2
    10% AJAX
    10% PHP

    Bowst, a software development company, offers Custom Software Development and UX/UI Design. The firm is in Portsmouth, New Hampshire.

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  • Purpledecks Logotype

    Not yet reviewed

    $25,000+
    $50 - $99 / hr
    10 - 49
    Longford, Ireland

    Services provided

    15% Web Development
    20% Mobile App Development
    20% UX/UI Design +4
    15% Custom Software Development
    10% Cloud Consulting & SI
    10% Enterprise App Modernization
    10% IoT Development

    Focus Areas

    25% JavaScript
    15% Java
    15% Swift +9
    8% C++
    8% Other programming & scripting languages
    8% SQL
    5% C
    5% Objective C
    5% Redux
    2% Go
    2% Kotlin
    2% Python

    UX company Purpledecks is in Longford, Ireland and. The team focuses on UX/UI Design and Mobile App Development.

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  • HashTag Technologies Logotype

    HashTag Technologies

    Not yet reviewed

    Undisclosed
    < $25 / hr
    10 - 49

    Services provided

    20% Web Development
    20% Custom Software Development
    20% E-Commerce Development +3
    20% Mobile App Development
    10% Pay Per Click
    10% Social Media Marketing

    Focus Areas

    20% JavaScript
    50% PHP
    10% Swift +4
    5% AJAX
    5% Objective C
    5% Other programming & scripting languages
    5% SQL

    HashTag Technologies is a custom software development firm established in 2014. Their services include Custom Software Development and E-Commerce Development.

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  • Sohan Vanani- Freelance Developer Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    Freelancer
    Ahmedabad, India

    Services provided

    25% Web Development
    75% Mobile App Development

    Focus Areas

    20% JavaScript
    20% Java
    20% Objective C +2
    20% PHP
    20% Swift

    Sohan Vanani- Freelance Developer is an app development firm. The team offers Mobile App Development and Web Development, and the firm is located in Ahmedabad, India.

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  • Equals Collective Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% E-Commerce Development
    10% IT Strategy Consulting +9
    10% Marketing Strategy
    10% Mobile App Development
    10% UX/UI Design
    10% Web Design
    8% Business Consulting
    7% Branding
    5% Conversion Optimization
    5% Pay Per Click
    5% Search Engine Optimization

    Focus Areas

    30% JavaScript
    20% Other programming & scripting languages
    20% PHP +3
    10% AJAX
    10% C#
    10% Redux

    Equals Collective, a small user experience design company, is in Guildford, England. The team focuses on UX/UI Design and E-Commerce Development.

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  • The Computer Shop Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Nottingham , England

    Services provided

    20% Web Development
    50% IT Managed Services
    20% Web Design +1
    10% Search Engine Optimization

    Focus Areas

    20% JavaScript
    20% Java
    20% Kotlin +2
    20% Python
    20% Swift

    Established in 2002, The Computer Shop is a small IT managed services company headquartered in Nottingham , England. Their team focuses on IT managed services and Web Design.

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  • Conde Graphics SEO Agency Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Buenos Aires, Argentina

    Services provided

    20% Web Development
    20% Marketing Strategy
    20% Search Engine Optimization +2
    20% Social Media Marketing
    20% Web Design

    Focus Areas

    20% JavaScript
    20% AJAX
    20% C++ +2
    20% Java
    20% PHP

    Conde Graphics SEO Agency is a small Marketing Strategy company headquartered in Buenos Aires, Argentina. The team provides Marketing Strategy and Search Engine Optimization.

    Read more
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  • Silvito Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    15% AR/VR Development
    15% Blockchain +4
    15% E-Commerce Development
    15% Mobile App Development
    10% Logo
    10% Web Design

    Focus Areas

    20% JavaScript
    20% C#
    20% Objective C +2
    20% PHP
    20% Swift

    Founded in 2014, Silvito is a website development company. The team provides Web Development and AR/VR development and is based in Kyiv, Ukraine.

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  • NULLPLEX SOFTWARE PRIVATE LIMITED Logotype

    Not yet reviewed

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

    Services provided

    30% Web Development
    20% UX/UI Design
    20% Web Design +4
    10% Mobile App Development
    10% Search Engine Optimization
    5% E-Commerce Development
    5% Social Media Marketing

    Focus Areas

    10% JavaScript
    30% PHP
    20% ASP.NET +3
    20% Visual Basic
    10% C#
    10% SQL

    NULLPLEX SOFTWARE PRIVATE LIMITED, a web development company, was established in 2012. The team focuses on Web Development and UX/UI Design.

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  • Outdare Logotype

    Not yet reviewed

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

    Services provided

    15% Web Development
    40% Custom Software Development
    20% Mobile App Development +4
    10% E-Commerce Development
    5% IT Strategy Consulting
    5% IoT Development
    5% Other Application Development

    Focus Areas

    25% JavaScript
    20% PHP
    20% SQL +6
    10% Other programming & scripting languages
    5% C#
    5% C++
    5% Objective C
    5% Python
    5% XML

    Outdare is a custom software development firm. The Lisbon, Portugal-based company specializes in Custom Software Development and Mobile App Development.

    Read more
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  • Akoom Tech Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    10 - 49
    London, England

    Services provided

    20% Web Development
    50% Custom Software Development
    15% E-Commerce Development +1
    15% Mobile App Development

    Focus Areas

    20% JavaScript
    20% PHP
    15% Python +5
    10% Redux
    10% SQL
    10% Swift
    10% Typescript
    5% AJAX

    Akoom Tech, a custom software development company, is based in London, England and Bristol, England. The team provides Custom Software Development and Web Development.

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We evaluate service providers using a structured methodology that combines:

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Ability to deliver
Focus
Clutch Leaders Matrix

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

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

List of the Top 15 JavaScript Development Companies

  1. ImageX Logotype

    ImageX

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

    Ability to deliver

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

    Service focus

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

    xfive

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

    Ability to deliver

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

    Service focus

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

    Brainhub

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

    Ability to deliver

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

    Service focus

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

    The Software House

    $10,000+
    $50 - $99 / hr
    50 - 249
    Gliwice, Poland

    Ability to deliver

    39.4/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    45% Web Development
    60% JavaScript
    55% Other
    View Profile Visit Website
  5. ATEAM SOFT SOLUTIONS Logotype

    ATEAM SOFT SOLUTIONS

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

    Ability to deliver

    38.1/40.0
    18.8/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

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

    Airdev

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

    Ability to deliver

    39.1/40.0
    19.8/20 Reviews
    9.6/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  7. 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
  8. Softonix Logotype

    Softonix

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

    Ability to deliver

    36.9/40.0
    18/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  9. Toptal Logotype

    Toptal

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

    Ability to deliver

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

    Service focus

    15% Web Development
    25% JavaScript
    85% Other
    View Profile Visit Website
  10. 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
  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. 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
  15. 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
  16. HTMLPanda Logotype

    HTMLPanda

    $1,000+
    < $25 / hr
    250 - 999
    Boston, 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
  17. Sigma Software Group Logotype

    Sigma Software Group

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

    Ability to deliver

    38.8/40.0
    19/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

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

    Incora

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

    Ability to deliver

    37.2/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9/10 Market Presence

    Service focus

    40% Web Development
    50% 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

    36.4/40.0
    16.8/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  21. WPWeb Infotech Logotype

    WPWeb Infotech

    $5,000+
    < $25 / hr
    50 - 249
    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
  22. Human Made Logotype

    Human Made

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

    Ability to deliver

    38.2/40.0
    18.4/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    100% Web Development
    30% JavaScript
    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. Experion Technologies Logotype

    Experion Technologies

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

    Ability to deliver

    36.8/40.0
    17.2/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% 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. Blazity Logotype

    Blazity

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

    Ability to deliver

    37.5/40.0
    18.4/20 Reviews
    10/10 Clients & Experience
    9.2/10 Market Presence

    Service focus

    50% Web Development
    70% JavaScript
    50% Other
    View Profile Visit Website
  27. XWP Logotype

    XWP

    $50,000+
    $150 - $199 / hr
    50 - 249
    Chelsea, Australia

    Ability to deliver

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

    Service focus

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

    Probey Services

    $1,000+
    < $25 / hr
    1,000 - 9,999
    London, England

    Ability to deliver

    36.5/40.0
    19.2/20 Reviews
    9.3/10 Clients & Experience
    8/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% Other
    View Profile Visit Website
  29. 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
  30. Oshyn Logotype

    Oshyn

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

    Ability to deliver

    36.2/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    8/10 Market Presence

    Service focus

    100% Web Development
    40% JavaScript
    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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