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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: December 22, 2025
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15 Leaders 15 Contenders

21,442 Companies

Programming & Scripting: JavaScript

List of the Top JavaScript Development Companies

  • Featured

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    Digis, a Fiverr company (NYSE: FVRR) Logotype

    Digis, a Fiverr company (NYSE: FVRR)

    4.9 87 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), specializes in full-stack web development, providing comprehensive services such as web and mobile app development, front-end and back-end engineering, and UI/UX design. With over 90% positive feedback, clients consistently praise their technical expertise, seamless communication, and proactive project management, attributing significant business success and operational enhancements to Digis' contributions.

    See all 87 projects

    Reviews mention Puts the customer first

    The reviews highlight a strong customer-first sentiment from Digis, with clients praising their commitment to project success and adaptability. One CEO noted that Digis took responsibility for delays without charging extra, demonstrating a genuine investment in their client's goals. Another client appreciated the team's structured communication and hands-on support, which facilitated project management. Overall, clients expressed satisfaction with Digis' work ethic and dedication, emphasizing their willingness to go above and beyond for customer success.
    • CRM System for Mentorship Program Platform
      5.0 Jul 31, 2020

      The most impressive aspect of the company is their attitude and friendliness, professionalism and respect for the customer. This is particularly noteworthy given the youthful nature of the team. It was the most effective experience of cooperation with IT firms, where all work issues were resolved professionally and comfortably.

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    Industry Experience

    Digis has demonstrated strong expertise across several industries, notably manufacturing, information technology, media, and education. Clients highlighted their effective project management, timely delivery, and high-quality work. In manufacturing, Digis improved website functionality, enhancing user experience. In IT, they provided specialized development support, notably in Scala and React, leading to increased efficiency. Overall, client feedback reflects a positive sentiment, suggesting strong alignment for projects across these sectors.

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    Select Industry to see insights

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

    View projects from:

    United States (27) Germany (7) Ukraine (7) England (4) France (4) Israel (3) South Africa (2) Canada (2) Italy (2) Sweden (2) Spain (2) Ireland (1) Netherlands (1) New Zealand (1) Poland (1) Romania (1) Russia (1) Lithuania (1) Latvia (1) Japan (1) Australia (1) Georgia (1) Scotland (1) Estonia (1)
    $50,000 Best for Small Companies $75,000 Best for Medium Companies $100,000 Best for Enterprises

    Custom Product Development

    Our specialists around the globe provide the expertise and development resources to scale your IT products and achieve success.
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  • Standard Data Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Branding
    10% E-Commerce Development +9
    10% Pay Per Click
    10% UX/UI Design
    10% Web Design
    7% Content Marketing
    7% Ecommerce Marketing
    7% Email Marketing
    7% Social Media Marketing
    6% Logo
    6% Search Engine Optimization

    Focus Areas

    20% JavaScript
    20% HTML5
    20% PHP +2
    20% SQL
    20% Visual Basic

    Standard Data is a branding agency. They offer Branding and Pay Per Click and were established in 2021.

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  • Delyserv Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% E-Commerce Development
    15% Mobile App Development +8
    10% Logo
    10% Low/No Code Development
    10% UX/UI Design
    10% Web Design
    5% Branding
    5% Content Writing Services
    5% Corporate Photography
    5% Graphic Design

    Focus Areas

    20% JavaScript
    20% PHP
    15% Java +5
    15% Python
    10% Kotlin
    10% Ruby
    5% ASP.NET
    5% Ember.js

    Delyserv, an application development company, was established in 2020. The team specializes in Mobile App Development and E-Commerce Development.

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  • InGauge LLC Logotype

    Not yet reviewed

    $5,000+
    $150 - $199 / hr
    2 - 9
    New York, NY

    Services provided

    20% Web Development
    30% Web Design
    10% AR/VR Development +8
    10% Search Engine Optimization
    10% UX/UI Design
    9% Digital Strategy
    4% AI Development
    2% Audio Production
    2% Mobile App Development
    2% Video Production
    1% Business Consulting

    Focus Areas

    10% JavaScript
    20% HTML5
    20% SQL +6
    19% Other programming & scripting languages
    12% AJAX
    10% Python
    5% XML
    3% PHP
    1% Objective C

    Small web design agency InGauge LLC, is headquartered in New York, New York. The team offers Web Design and Web Development.

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  • Okuhle Digital Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9
    Johannesburg, South Africa

    Services provided

    20% Web Development
    20% Cloud Consulting & SI
    20% Graphic Design +4
    10% Low/No Code Development
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Web Design

    Focus Areas

    10% JavaScript
    50% PHP
    20% SQL +2
    10% C#
    10% Python

    Okuhle Digital, a web design agency, is in Johannesburg, South Africa. The team provides Web Design and Graphic Design.

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  • STAR WEB LLC Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Branding
    10% Content Marketing +7
    10% E-Commerce Development
    10% Logo
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Video Marketing
    10% Web Design

    Focus Areas

    20% JavaScript
    20% AJAX
    20% HTML5 +2
    20% Other programming & scripting languages
    20% PHP

    Branding company STAR WEB LLC is headquartered in Denton, Texas. The team provides Branding and Social Media Marketing.

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  • Devinti Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    13% Low/No Code Development
    10% E-Commerce Development +17
    10% Mobile App Development
    10% Pay Per Click
    10% Social Media Marketing
    5% Graphic Design
    5% IT Staff Augmentation
    5% Logo
    5% UX/UI Design
    2% Cloud Consulting & SI
    2% Digital Strategy
    2% Ecommerce Marketing
    2% Email Marketing
    2% IT Managed Services
    2% Other Digital Marketing
    2% Packaging Design
    1% Custom Software Development
    1% Other Application Development
    1% Web Design

    Focus Areas

    20% JavaScript
    20% PHP
    10% HTML5 +7
    10% Python
    10% SQL
    10% Typescript
    5% AJAX
    5% Go
    5% Kotlin
    5% Ruby

    Located in Brampton, Canada and London, England, Devinti is a small social media marketing company. The team specializes in Social Media Marketing and Pay Per Click.

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  • Get Up Solutions Sdn Bhd Logotype

    Not yet reviewed

    $5,000+
    Undisclosed
    2 - 9
    Cyberjaya, Malaysia

    Services provided

    15% Web Development
    30% Web Design
    15% Custom Software Development +4
    15% UX/UI Design
    10% E-Commerce Development
    10% Low/No Code Development
    5% IT Strategy Consulting

    Focus Areas

    15% JavaScript
    35% HTML5
    25% PHP +2
    15% Redux
    10% Python

    Get Up Solutions Sdn Bhd is a small Cyberjaya, Malaysia-based web design company. The team focuses on Web Design and UX/UI Design.

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  • TymesTech Logotype

    TymesTech

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    30% Web Design
    10% Graphic Design +5
    10% Low/No Code Development
    10% Social Media Marketing
    10% UX/UI Design
    5% Content Writing Services
    5% Conversion Optimization

    Focus Areas

    10% JavaScript
    30% HTML5
    30% PHP +2
    20% SQL
    10% AJAX

    TymesTech is a web design agency. They were established in 2023, and their services include Web Design and Web Development.

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  • i6 technology Logotype

    Not yet reviewed

    $25,000+
    $100 - $149 / hr
    2 - 9
    Calabasas, CA

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Enterprise App Modernization +5
    10% Application Management & Support
    10% IT Strategy Consulting
    10% UX/UI Design
    5% AI Consulting
    5% Mobile App Development

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% C# +5
    15% SQL
    10% AJAX
    10% HTML5
    10% jquery
    5% Ruby

    Launched in 2015, i6 technology is a software development firm. The company focuses on Custom Software Development and Web Development.

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  • Parallel Digital Logotype

    Parallel Digital

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Branding
    10% Content Marketing +7
    10% E-Commerce Development
    10% Graphic Design
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    25% AJAX
    25% SQL +2
    20% PHP
    10% jquery

    Parallel Digital is a branding agency. Established in 2023, the agency is headquartered in Manchester, England. Their services include Branding and Social Media Marketing.

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  • ITSG Logotype

    ITSG

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    2 - 9

    Services provided

    10% Web Development
    10% Branding
    10% Custom Software Development +17
    10% Graphic Design
    10% Video Production
    10% Web Design
    5% Corporate Photography
    5% E-Commerce Development
    5% Mobile App Development
    4% Logo
    3% Digital Strategy
    3% Social Media Marketing
    2% Advertising
    2% Direct Marketing
    2% Pay Per Click
    2% Print Design
    2% Product Design
    2% Search Engine Optimization
    2% UX/UI Design
    1% Other Digital Marketing

    Focus Areas

    26% JavaScript
    42% PHP
    11% SQL +4
    6% AJAX
    5% HTML5
    5% Other programming & scripting languages
    5% jquery

    Small branding agency ITSG, is in Busnago, Italy. The team provides Branding and Web Design.

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  • Sigma Xperts Logotype

    Sigma Xperts

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Content Marketing
    10% Content Writing Services +7
    10% Digital Strategy
    10% E-Commerce Development
    10% Ecommerce Marketing
    10% Graphic Design
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    50% PHP
    30% SQL

    Sigma Xperts, a Digital Strategy company, was launched in 2018. The team provides Digital Strategy and Social Media Marketing and is located in Madharian Wala Kalar, Pakistan.

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  • Codeify Logotype

    Codeify

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% E-Commerce Development
    10% Advertising +5
    10% Content Marketing
    10% Custom Software Development
    10% Digital Strategy
    10% Low/No Code Development
    10% Social Media Marketing

    Focus Areas

    10% JavaScript
    80% PHP
    10% HTML5

    Custom software development company Codeify is based in Zembrzyce, Poland. Established in 2021, the team specializes in Custom Software Development and Web Development.

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  • DavionInfotech Logotype

    DavionInfotech

    Not yet reviewed

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

    Services provided

    20% Web Development
    40% IT Staff Augmentation
    20% IT Managed Services +1
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    15% Redux
    10% AJAX +8
    10% Java
    10% Kotlin
    10% PHP
    10% Python
    10% Visual Basic
    5% ASP.NET
    5% Ember.js
    5% Other programming & scripting languages

    DavionInfotech is an IT staff augmentation company located in Sheridan, Wyoming. They specialize in IT staff augmentation and IT managed services and were founded in 2018.

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  • Vasant Software Solution Logotype

    Vasant Software Solution

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% C# +6
    15% Typescript
    10% AJAX
    10% SQL
    5% HTML5
    5% Kotlin
    5% jquery

    Vasant Software Solution is a web design company. Founded in 2018, the company offers Web Design and UX/UI Design.

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  • Ayup Creative Logotype

    Not yet reviewed

    $1,000+
    Undisclosed
    2 - 9
    Sheffield, England

    Services provided

    20% Web Development
    20% Digital Strategy
    20% Graphic Design +2
    20% Search Engine Optimization
    20% Web Design

    Focus Areas

    10% JavaScript
    65% PHP
    15% HTML5 +1
    10% SQL

    Ayup Creative is a Digital Strategy company. Founded in 2023, the team focuses on Digital Strategy and Search Engine Optimization.

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  • Black Nova Logotype

    Black Nova

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Branding
    10% Business Consulting +7
    10% E-Commerce Development
    10% Logo
    10% Low/No Code Development
    10% Packaging Design
    10% Sales Outsourcing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    25% PHP
    25% Python +4
    15% HTML5
    5% Ruby
    5% SQL
    5% XML

    Black Nova is a website development company. They are in Navi Mumbai, India and have small team of experts. Their services include Web Development and Branding.

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  • Taatgen Development LLC Logotype

    Taatgen Development LLC

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% AI Consulting
    10% AI Development +7
    10% Conversion Optimization
    10% Custom Software Development
    10% E-Commerce Development
    10% Mobile App Development
    10% Search Engine Optimization
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% Redux
    15% HTML5 +5
    15% Typescript
    10% PHP
    10% Python
    5% Ember.js
    5% Kotlin

    Taatgen Development LLC is a Conversion Optimization company. Their team is located in Irving, Texas and specializes in Conversion Optimization and Search Engine Optimization.

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  • Pulla Digital Logotype

    Pulla Digital

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Mobile App Development +3
    20% Web Design
    10% AR/VR Development
    10% Search Engine Optimization

    Focus Areas

    10% JavaScript
    30% PHP
    25% Typescript +3
    20% SQL
    10% jquery
    5% AJAX

    Web design agency Pulla Digital was founded in 2015. The team provides Web Design and Custom Software Development.

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  • move2edge Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% API Development
    20% Custom Software Development +2
    20% IoT Development
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    15% Python
    10% C# +9
    10% Go
    10% Java
    10% SQL
    10% Typescript
    5% C
    5% C++
    5% Kotlin
    5% Objective C
    5% Swift

    Move2edge is a software development company. In Gdańsk, Poland, the team offers Custom Software Development and Web Development.

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  • Kaweah Tech Logotype

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    2 - 9
    Tulare, CA

    Services provided

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

    Focus Areas

    10% JavaScript
    55% Typescript
    20% Rust +3
    5% Java
    5% Kotlin
    5% Scala

    Headquartered in Tulare, California, Kaweah Tech is a web design company. They specialize in Web Design and UX/UI Design.

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  • Aegisbit Technologies Logotype

    Aegisbit Technologies

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    20% Web Development
    20% API Development
    20% Custom Software Development +2
    20% DevOps Managed Services
    20% E-Commerce Development

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% C# +6
    10% AJAX
    10% SQL
    10% Visual Basic
    10% jquery
    5% HTML5
    5% PHP

    Aegisbit Technologies is a custom software development company based in Mohali, India. The team focuses on Custom Software Development and Web Development.

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  • Blizztech Solutions Logotype

    Blizztech Solutions

    Not yet reviewed

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

    Services provided

    15% Web Development
    15% Custom Software Development
    15% Logo +4
    15% Social Media Marketing
    15% UX/UI Design
    15% Web Design
    10% Search Engine Optimization

    Focus Areas

    15% JavaScript
    15% ASP.NET
    15% C# +5
    15% Kotlin
    15% PHP
    10% Python
    10% jquery
    5% SQL

    Established in 2019, Blizztech Solutions is a social media marketing company. The team specializes in Social Media Marketing and Web Design.

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  • INFASO Logotype

    INFASO

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% Digital Strategy
    20% Social Media Marketing +4
    15% Graphic Design
    15% Pay Per Click
    15% Search Engine Optimization
    5% Branding

    Focus Areas

    20% JavaScript
    40% PHP
    30% SQL +1
    10% AJAX

    INFASO is a small Digital Strategy company. Founded in 2019, the team provides Digital Strategy and Social Media Marketing.

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  • Canny Vision Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    60% AI Development
    20% Custom Software Development

    Focus Areas

    10% JavaScript
    20% C++
    10% HTML5 +6
    10% Java
    10% Other programming & scripting languages
    10% Python
    10% SQL
    10% Typescript
    10% XML

    Founded in 2024, Canny Vision is an AI development company. The team offers Artificial Intelligence and Custom Software Development and is located in Toronto, Canada and Tunis, Tunisia.

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  • Punggawa Studio Logotype

    Punggawa Studio

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9

    Services provided

    10% Web Development
    10% AI Development
    10% Content Marketing +7
    10% Custom Software Development
    10% E-Commerce Development
    10% Microservices Architecture Services
    10% Mobile App Development
    10% Search Engine Optimization
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% HTML5
    20% Other programming & scripting languages +2
    20% PHP
    20% SQL

    Punggawa Studio, a Content Marketing company, focuses on Content Marketing and Search Engine Optimization. The agency is in Surabaya, Indonesia.

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  • SoftSyncDev Logotype

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    10% HTML5
    10% PHP +7
    10% Python
    10% Redux
    10% SQL
    10% Typescript
    10% Visual Basic
    10% XML
    10% jquery

    SoftSyncDev is an UX design agency. The Karachi, Pakistan-based team focuses on UX/UI Design and Custom Software Development.

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  • MODDER CODER IT SOLUTIONS PRIVATE LIMITED Logotype

    MODDER CODER IT SOLUTIONS PRIVATE LIMITED

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Mobile App Development +3
    20% UX/UI Design
    10% AI Development
    10% Application Testing

    Focus Areas

    10% JavaScript
    15% Other programming & scripting languages
    15% SQL +9
    15% Visual Basic
    10% Typescript
    5% AJAX
    5% Ember.js
    5% HTML5
    5% Kotlin
    5% Redux
    5% Swift
    5% jquery

    MODDER CODER IT SOLUTIONS PRIVATE LIMITED is a small user experience design agency. They provide UX/UI Design and Custom Software Development and were founded in 2022.

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  • Dezyn 360, Inc. Logotype

    Not yet reviewed

    $50,000+
    $100 - $149 / hr
    2 - 9
    West Palm Beach, FL

    Services provided

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

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP.NET +7
    10% HTML5
    10% PHP
    10% Python
    10% Redux
    10% SQL
    10% XML
    10% jquery

    Dezyn 360, Inc. Is a branding agency. Established in 2018, the company is headquartered in West Palm Beach, Florida. Their team provides Branding and Social Media Marketing.

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  • Can2 Multimedia Logotype

    Can2 Multimedia

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    2 - 9

    Services provided

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

    Focus Areas

    10% JavaScript
    50% HTML5
    25% PHP +2
    10% XML
    5% SQL

    Can2 Multimedia is a social media marketing company located in Pharr, Texas. They provide Social Media Marketing and Search Engine Optimization.

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  • Navees Infotech Logotype

    Navees Infotech

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Content Marketing
    20% E-Commerce Development +2
    20% Pay Per Click
    20% Social Media Marketing

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +7
    10% Java
    10% Kotlin
    10% Objective C
    10% Redux
    10% Swift
    10% Typescript
    10% jquery

    Navees Infotech is a social media marketing firm. Founded in 2015, the company is headquartered in New York, New York. Their team focuses on Social Media Marketing and Content Marketing.

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  • ReadNRevise Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% AI Development
    20% Cloud Consulting & SI +2
    20% Cybersecurity
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    25% Java
    15% Typescript +5
    10% Other programming & scripting languages
    10% Python
    10% Ruby
    10% SQL
    10% Swift

    Established in 2023, ReadNRevise, a small cloud consulting & SI company, is located in Ghaziabad, India. Their team provides cloud consulting & SI and Cybersecurity.

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  • Tackle-D Private Limited Logotype

    Tackle-D Private Limited

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Cloud Consulting & SI
    20% Mobile App Development +2
    20% Search Engine Optimization
    20% UX/UI Design

    Focus Areas

    10% JavaScript
    20% Objective C
    20% Python +4
    20% Swift
    10% C#
    10% Java
    10% PHP

    Tackle-D Private Limited is a Kushalnagar, India-based SEO company. They specialize in Search Engine Optimization and UX/UI Design and were launched in 2020.

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  • MainStreet Design Logotype

    MainStreet Design

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    20% API Development
    20% Branding +2
    20% Search Engine Optimization
    20% Social Media Marketing

    Focus Areas

    10% JavaScript
    50% Other programming & scripting languages
    10% PHP +3
    10% SQL
    10% XML
    10% jquery

    Branding firm MainStreet Design was established in 2011. The small team focuses on Branding and Social Media Marketing.

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  • DIGITAL WEBXPERT Logotype

    DIGITAL WEBXPERT

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    40% PHP
    10% Java +6
    10% Python
    10% SQL
    5% AJAX
    5% C#
    5% C++
    5% Typescript

    DIGITAL WEBXPERT is a social media marketing company founded in 2016. Located in Madhupur, India, the team offers Social Media Marketing and Web Design.

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  • techinhawk Logotype

    techinhawk

    Not yet reviewed

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

    Services provided

    10% Web Development
    80% Mobile App Development
    10% AI Development

    Focus Areas

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

    Techinhawk is an app development company. Their small team is based in Dehradun, India and offers Mobile App Development and Web Development. The agency was established in 2024.

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  • Gor Technologies Logotype

    Gor Technologies

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9

    Services provided

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

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% Typescript +4
    15% C#
    15% Swift
    10% Kotlin
    10% SQL

    Custom software development company Gor Technologies is in Ahmedabad, India. The team provides Custom Software Development and Web Development.

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  • Diloxy Logotype

    Diloxy

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Custom Software Development
    20% AI Development +3
    10% DevOps Managed Services
    10% IT Strategy Consulting
    10% Mobile App Development

    Focus Areas

    10% JavaScript
    15% Java
    15% Python +7
    10% Go
    10% Redux
    10% SQL
    10% Scala
    10% Typescript
    5% Kotlin
    5% Other programming & scripting languages

    Custom software development company Diloxy is located in București, Romania. They specialize in Custom Software Development and Web Development.

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  • Product on Point Logotype

    Product on Point

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% AI Consulting
    10% Business Consulting +7
    10% Custom Software Development
    10% Digital Strategy
    10% Product Design
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% PHP
    20% Python +2
    20% SQL
    20% Visual Basic

    Founded in 2024, Product on Point is a Digital Strategy company. The team specializes in Digital Strategy and Social Media Marketing and is headquartered in Chamblee, Georgia.

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  • Akwid Labs Logotype

    Akwid Labs

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9

    Services provided

    15% Web Development
    20% AI Consulting
    20% AI Development +6
    20% Custom Software Development
    5% Branding
    5% Generative AI
    5% IT Strategy Consulting
    5% Mobile App Development
    5% UX/UI Design

    Focus Areas

    10% JavaScript
    25% Java
    25% Python +2
    25% Typescript
    15% Other programming & scripting languages

    Established in 2018, Akwid Labs is a custom software development firm. The team focuses on Custom Software Development and Artificial Intelligence.

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  • Cetreno Infotech Pvt Ltd Logotype

    Cetreno Infotech Pvt Ltd

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    10% Web Development
    25% Social Media Marketing
    15% Web Design +6
    10% Content Marketing
    10% E-Commerce Development
    10% Search Engine Optimization
    10% UX/UI Design
    5% Digital Strategy
    5% Email Marketing

    Focus Areas

    10% JavaScript
    50% PHP
    25% SQL +1
    15% Other programming & scripting languages

    Cetreno Infotech Pvt Ltd, a small social media marketing firm, is located in Mumbai, Maharashtra, India. The team offers Social Media Marketing and Web Design.

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  • Nexaplay Studio Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% E-Commerce Development
    20% Graphic Design +4
    20% Mobile App Development
    10% AR/VR Development
    10% Custom Software Development
    10% UX/UI Design

    Focus Areas

    11% JavaScript
    22% jquery
    12% HTML5 +5
    11% C#
    11% C++
    11% Java
    11% Other programming & scripting languages
    11% PHP

    Nexaplay Studio is a graphic design company founded in 2022. Their services include Graphic Design and Mobile App Development.

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  • PSK Technology Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Cloud Consulting & SI
    10% Custom Software Development +9
    10% E-Commerce Development
    10% IT Strategy Consulting
    10% Mobile & App Marketing
    10% Mobile App Development
    10% UX/UI Design
    10% Web Design
    4% IoT Development
    3% Application Testing
    3% Business Consulting

    Focus Areas

    10% JavaScript
    20% Swift
    15% Kotlin +5
    15% Objective C
    10% ASP.NET
    10% Apex
    10% Java
    10% PHP

    PSK Technology is a software development firm founded in 2015. The agency focuses on Custom Software Development and UX/UI Design.

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  • Kartal inc. Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    10 - 49
    Port Harcourt, Nigeria

    Services provided

    10% Web Development
    12% Custom Software Development
    12% Web Design +9
    10% Graphic Design
    10% Mobile App Development
    9% Social Media Marketing
    8% E-Commerce Development
    7% IT Strategy Consulting
    6% Digital Strategy
    6% Print Design
    5% Logo
    5% Search Engine Optimization

    Focus Areas

    10% JavaScript
    40% PHP
    12% AJAX +4
    12% SQL
    10% Java
    10% Kotlin
    6% Redux

    Launched in 2017, Kartal inc., a small web design agency, is based in Port Harcourt, Nigeria. Their services include Web Design and Custom Software Development.

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  • Jasvertising Solutions - Digital Marketing Agency in South Africa Logotype

    Jasvertising Solutions - Digital Marketing Agency in South Africa

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    15% Web Development
    20% Social Media Marketing
    10% Advertising +6
    10% Branding
    10% E-Commerce Development
    10% Graphic Design
    10% Other Marketing
    10% Search Engine Optimization
    5% Business Consulting

    Focus Areas

    10% JavaScript
    50% SQL
    30% PHP +1
    10% Java

    Jasvertising Solutions - Digital Marketing Agency in South Africa is a social media marketing firm launched in 2018. The agency focuses on Social Media Marketing and Web Development.

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  • WEBWIZCRAFT Logotype

    WEBWIZCRAFT

    Not yet reviewed

    $1,000+
    < $25 / hr
    Freelancer

    Services provided

    20% Web Development
    15% Low/No Code Development
    15% UX/UI Design +5
    10% Advertising
    10% E-Commerce Development
    10% Ecommerce Marketing
    10% Search Engine Optimization
    10% Web Design

    Focus Areas

    20% JavaScript
    30% HTML5
    25% Java +2
    15% PHP
    10% jquery

    WEBWIZCRAFT is a website development company founded in 2020. The agency specializes in Web Development and Web Design.

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  • Dark Hand Coders Logotype

    Dark Hand Coders

    Not yet reviewed

    Undisclosed
    < $25 / hr
    Freelancer

    Services provided

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

    Focus Areas

    20% JavaScript
    20% Kotlin
    20% PHP +2
    20% Python
    20% SQL

    Dark Hand Coders is a social media marketing firm. The agency is based in Chennai, India. Their services include Social Media Marketing and Search Engine Optimization.

    Read more
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  • The Imagination Factory Logotype

    Not yet reviewed

    $5,000+
    $150 - $199 / hr
    2 - 9
    Grand Rapids, MI

    Services provided

    10% Web Development
    20% E-Commerce Development
    20% Marketing Strategy +5
    10% Branding
    10% Content Marketing
    10% Graphic Design
    10% Search Engine Optimization
    10% Web Design

    Focus Areas

    10% JavaScript
    25% PHP
    20% AJAX +4
    20% SQL
    10% HTML5
    10% jquery
    5% Perl

    Marketing Strategy company The Imagination Factory was founded in 1985. The firm focuses on Marketing Strategy and E-Commerce Development.

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  • ilovesolution Logotype

    ilovesolution

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% UX/UI Design
    13% Low/No Code Development +13
    10% Web Design
    5% Advertising
    5% Branding
    5% Conversion Optimization
    5% E-Commerce Development
    5% Ecommerce Marketing
    5% Graphic Design
    5% Pay Per Click
    5% Print Design
    5% Search Engine Optimization
    5% Social Media Marketing
    1% Custom Software Development
    1% Mobile App Development

    Focus Areas

    10% JavaScript
    20% PHP
    20% Typescript +6
    10% C#
    10% Go
    10% Other programming & scripting languages
    10% Python
    5% Java
    5% SQL

    Ilovesolution is an UX agency. Based in Düsseldorf, Germany, their team specializes in UX/UI Design and Web Development.

    Read more
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  • Pizero Logotype

    Pizero

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% Custom Software Development
    10% AI Agents +6
    10% API Development
    10% Cybersecurity
    10% E-Commerce Development
    10% IT Strategy Consulting
    10% Microservices Architecture Services
    10% Mobile App Development

    Focus Areas

    10% JavaScript
    25% PHP
    15% Kotlin +4
    15% SQL
    15% Swift
    10% AJAX
    10% Python

    Pizero is a Lucca, Italy-based software development company. They specialize in Custom Software Development and IT strategy consulting and were founded in 2013.

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We evaluate service providers using a structured methodology that combines:

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

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Ability to deliver
Focus
Clutch Leaders Matrix

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

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

List of the Top 15 JavaScript Development Companies

  1. 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

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

    37.7/40.0
    18.4/20 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

    38.9/40.0
    19.6/20 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

    39.3/40.0
    19.8/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    50% Web Development
    35% JavaScript
    50% Other
    View Profile Visit Website
  8. Toptal Logotype

    Toptal

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

    Ability to deliver

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

    Service focus

    15% Web Development
    25% JavaScript
    85% Other
    View Profile Visit Website
  9. 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
  10. INOXOFT Logotype

    INOXOFT

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

    Ability to deliver

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

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  11. 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
  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. Techuz InfoWeb Pvt. Ltd. Logotype

    Techuz InfoWeb Pvt. Ltd.

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

    Ability to deliver

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

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  16. 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
  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. 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

    30% Web Development
    15% JavaScript
    70% Other
    View Profile Visit Website
  21. Brainium Information Technologies Logotype

    Brainium Information Technologies

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

    Ability to deliver

    36.3/40.0
    19/20 Reviews
    9/10 Clients & Experience
    8.4/10 Market Presence

    Service focus

    35% Web Development
    30% JavaScript
    65% Other
    View Profile Visit Website
  22. 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
  23. 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
  24. Human Made Logotype

    Human Made

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

    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
  25. Probey Services Logotype

    Probey Services

    $1,000+
    < $25 / hr
    1,000 - 9,999
    Los Angeles, CA

    Ability to deliver

    36.9/40.0
    19.6/20 Reviews
    9.3/10 Clients & Experience
    8/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% Other
    View Profile Visit Website
  26. Blazity Logotype

    Blazity

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

    Ability to deliver

    37.8/40.0
    18.6/20 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
    New York, NY

    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. Vincit Logotype

    Vincit

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

    Ability to deliver

    36.4/40.0
    16.4/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    30% Web Development
    30% JavaScript
    70% Other
    View Profile Visit Website
  29. PowerGate Software Logotype

    PowerGate Software

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

    Ability to deliver

    37.9/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

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

    Arcanys

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

    Ability to deliver

    38.1/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    8.7/10 Market Presence

    Service focus

    30% Web Development
    20% 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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