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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 21, 2025
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15 Leaders 15 Contenders

21,441 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
    6 of 6 reviews are 5 stars
    1 new review for Web Development services
    $10,000 – $49,000 avg. project cost

    Reviewed 6 times in the past 6 months

    Recent reviews for Digis highlight a strong overall sentiment, emphasizing excellent communication, timely delivery, and effective project management. Clients praised their quality of work, with one noting a 25% reduction in bug backlog and another highlighting increased conversions and improved user satisfaction. Specific feedback included the ability to adapt quickly to project needs and a solid understanding of Agile methodologies. No significant areas for improvement were identified, indicating high client satisfaction.
    Read 6 Recent Reviews
    5 of 5 JavaScript reviews are 5 stars
    2 new reviews for JavaScript in past 6 months
    $10,000 – $49,000 avg. project cost

    JavaScript Experience

    Digis has received overwhelmingly positive feedback from clients regarding their JavaScript services, with 92% of reviews highlighting strong project management and timely delivery. Clients frequently commend their top-tier developers and effective communication, resulting in faster feature delivery and enhanced productivity. Notably, 100% of reviewers did not identify any areas for improvement. The consistent ability to meet deadlines and provide quality solutions has made Digis a preferred partner for various projects, demonstrating their expertise in JavaScript-based applications.

    Read Most Recent Review
    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

    Development Staff Augmentation for Online Cooking Platform

    5.0 — Digis, a Fiverr company (NYSE: FVRR) provides staff augmentation services for an online cooking platform. The team is fully integrated into the client's existing agile squads and contributes to the Read more
    Read 22 Reviews
    $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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  • D2R Tech Private Limited Logotype

    D2R Tech Private Limited

    Not yet reviewed

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

    Services provided

    10% Web Development
    30% E-Commerce Development
    30% Mobile App Development +5
    10% Custom Software Development
    5% Application Testing
    5% Enterprise App Modernization
    5% IT Strategy Consulting
    5% Other Application Development

    Focus Areas

    20% JavaScript
    50% PHP
    15% Go +3
    5% AJAX
    5% ASP.NET
    5% Swift

    Mobile application development company D2R Tech Private Limited is headquartered in Gurgaon, India. They specialize in Mobile App Development and E-Commerce Development and were founded in 2021.

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  • UpBased Logotype

    UpBased

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Custom Software Development
    30% Mobile App Development +2
    10% Application Testing
    10% Cybersecurity

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +11
    10% C++
    10% PHP
    10% SQL
    5% AJAX
    5% C
    5% Java
    5% Kotlin
    5% Python
    5% Redux
    5% Swift
    5% Typescript

    UpBased is a custom software development company. The Belgrade, Serbia-based firm was established in 2021. Their services include Custom Software Development and Mobile App Development.

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  • DarkBuild Technologies Private Limited Logotype

    DarkBuild Technologies Private Limited

    Not yet reviewed

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

    Services provided

    15% Web Development
    25% Mobile App Development
    15% AI Development +4
    15% Application Management & Support
    10% BI & Big Data Consulting & SI
    10% Cloud Consulting & SI
    10% Low/No Code Development

    Focus Areas

    15% JavaScript
    20% Redux
    15% PHP +6
    15% Python
    15% SQL
    5% AJAX
    5% C++
    5% Java
    5% Other programming & scripting languages

    Founded in 2022, DarkBuild Technologies Private Limited is a web development firm. Their team provides Web Development and Mobile App Development.

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  • THEPRIZM Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    25% UX/UI Design
    20% Mobile App Development +4
    15% Low/No Code Development
    10% Custom Software Development
    10% Other Application Development
    10% Web Design

    Focus Areas

    20% JavaScript
    20% PHP
    20% Python +4
    15% Swift
    10% C++
    10% Typescript
    5% C#

    THEPRIZM is an UX design company. Based in Kyiv, Ukraine and Braga, Portugal, the team specializes in UX/UI Design and Web Development.

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  • blockfi studio Logotype

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    20% JavaScript
    50% Go
    20% PHP +1
    10% C

    Blockfi studio, a Blockchain company, was launched in 2022. Headquartered in Almaty, Kazakhstan, the team offers Blockchain and Custom Software Development.

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  • Digiflax Technologies Private Limited Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    30% Custom Software Development
    10% E-Commerce Development +7
    10% IT Managed Services
    10% IT Staff Augmentation
    10% Low/No Code Development
    5% Application Management & Support
    5% Application Testing
    5% Cybersecurity
    5% IT Strategy Consulting

    Focus Areas

    20% JavaScript
    20% Java
    20% Python +5
    10% C#
    10% C++
    10% PHP
    5% ASP
    5% ASP.NET

    Digiflax Technologies Private Limited, a software development firm, is headquartered in Hyderabad, India. Their services include Custom Software Development and IT managed services.

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  • Digencial Logotype

    Digencial

    Not yet reviewed

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

    Services provided

    10% Web Development
    30% UX/UI Design
    15% Product Design +6
    10% Graphic Design
    10% Low/No Code Development
    10% Mobile & App Marketing
    5% Branding
    5% Content Marketing
    5% Social Media Marketing

    Focus Areas

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

    Digencial is an UX design agency. They are located in Jalandhar, India and have small team of experts. Their services include UX/UI Design and Web Development.

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  • IOTECK SOLUTIONS Logotype

    IOTECK SOLUTIONS

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9

    Services provided

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

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +7
    10% Java
    10% Kotlin
    10% Other programming & scripting languages
    10% Python
    10% Redux
    10% Swift
    10% Typescript

    IOTECK SOLUTIONS is a software development firm in Islamabad, Pakistan. The team offers Custom Software Development and Web Development.

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  • Donga Technologies Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% E-Commerce Development
    15% Social Media Marketing +5
    10% Ecommerce Marketing
    10% Mobile App Development
    10% Search Engine Optimization
    10% Web Design
    5% Custom Software Development

    Focus Areas

    10% JavaScript
    80% PHP
    10% AJAX

    Donga Technologies, a website development firm, is headquartered in Junagadh, India. They specialize in Web Development and E-Commerce Development and were established in 2016.

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  • Intelly Logotype

    Intelly

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% Digital Strategy
    20% Search Engine Optimization +4
    20% Social Media Marketing
    10% Low/No Code Development
    10% Pay Per Click
    10% UX/UI Design

    Focus Areas

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

    Founded in 2020, Intelly is a Digital Strategy company. Based in Toronto, Canada, the team provides Digital Strategy and Social Media Marketing.

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  • Kodefirst Logotype

    Not yet reviewed

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

    Services provided

    15% Web Development
    15% E-Commerce Development
    10% Application Management & Support +6
    10% Custom Software Development
    10% Low/No Code Development
    10% Mobile App Development
    10% Search Engine Optimization
    10% UX/UI Design
    10% Web Design

    Focus Areas

    15% JavaScript
    25% PHP
    20% SQL +4
    15% AJAX
    15% HTML5
    5% Python
    5% Typescript

    Kodefirst is a small web design agency established in 2013. Their team specializes in Web Design and Custom Software Development.

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  • Coastart Studio - Digital Agency Logotype

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    2 - 9
    Martil, Morocco

    Services provided

    10% Web Development
    40% UX/UI Design
    20% Branding +3
    10% Digital Strategy
    10% Low/No Code Development
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    55% PHP
    25% Other programming & scripting languages

    Founded in 2020, Coastart Agency is a small Martil, Morocco-based UX agency. Their team offers UX/UI Design and Branding.

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  • Morphosis Studios Logotype

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    2 - 9
    Denver, CO

    Services provided

    10% Web Development
    15% Ecommerce Marketing
    10% E-Commerce Development +12
    10% Social Media Marketing
    5% Application Management & Support
    5% Branding
    5% Business Consulting
    5% Digital Strategy
    5% Email Marketing
    5% Graphic Design
    5% Marketing Strategy
    5% Packaging Design
    5% Print Design
    5% Search Engine Optimization
    5% Web Design

    Focus Areas

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

    Morphosis Studios is an Ecommerce Marketing company launched in 2021. Their services include Ecommerce Marketing and Social Media Marketing.

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  • Thrive Web Media Logotype

    Thrive Web Media

    Not yet reviewed

    $1,000+
    Undisclosed
    2 - 9

    Services provided

    10% Web Development
    25% Digital Strategy
    10% E-Commerce Development +11
    5% Conversion Optimization
    5% Ecommerce Marketing
    5% Email Marketing
    5% Graphic Design
    5% Logo
    5% Product Design
    5% Search Engine Optimization
    5% Social Media Marketing
    5% UX/UI Design
    5% Video Marketing
    5% Web Design

    Focus Areas

    20% JavaScript
    55% HTML5
    20% PHP +1
    5% AJAX

    Digital Strategy company Thrive Web Media was launched in 2019. The company focuses on Digital Strategy and Web Development.

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  • Voxtus Technologies Private Limited Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    35% Other Application Development
    20% Mobile App Development +2
    15% Custom Software Development
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    30% C#
    20% ASP.NET +5
    10% HTML5
    10% Python
    10% SQL
    5% Java
    5% Visual Basic

    Voxtus Technologies Private Limited is an Other Application Development company. They were launched in 2022 and offer Other Application Development and Custom Software Development.

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  • Digidawn Technologies India Pvt Ltd Logotype

    Digidawn Technologies India Pvt Ltd

    Not yet reviewed

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

    Services provided

    10% Web Development
    25% E-Commerce Development
    10% Custom Software Development +6
    10% Graphic Design
    10% Low/No Code Development
    10% Mobile App Development
    10% UX/UI Design
    10% Web Design
    5% Logo

    Focus Areas

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

    Digidawn Technologies India Pvt Ltd, an e-commerce development company, is headquartered in New Delhi, India. Their services include E-Commerce Development and Custom Software Development.

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  • Inwebtreat Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Durban, South Africa

    Services provided

    20% Web Development
    20% Content Writing Services
    20% E-Commerce Development +3
    20% Graphic Design
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    10% JavaScript
    10% Apex
    10% Ember.js +7
    10% Java
    10% Objective C
    10% Other programming & scripting languages
    10% PHP
    10% Python
    10% UnrealScript
    10% Visual Basic

    Inwebtreat is a web design agency. They are based in Durban, South Africa and have small team. They offer Web Design and Graphic Design.

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  • TechForgers Logotype

    TechForgers

    Not yet reviewed

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

    Services provided

    10% Web Development
    50% Custom Software Development
    30% Mobile App Development +1
    10% Web Design

    Focus Areas

    20% JavaScript
    70% Typescript
    10% ASP.NET

    Established in 2022, TechForgers is a software development firm. The small team specializes in Custom Software Development and Mobile App Development.

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  • 3volve Labs Sdn Bhd Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Kuala Lumpur, Malaysia

    Services provided

    10% Web Development
    50% Custom Software Development
    20% IT Strategy Consulting +3
    10% Other Application Development
    5% Cloud Consulting & SI
    5% IT Managed Services

    Focus Areas

    20% JavaScript
    50% PHP
    10% HTML5 +3
    10% Python
    5% Kotlin
    5% Swift

    Software development company 3volve Labs Sdn Bhd was established in 2022. The agency specializes in Custom Software Development and IT strategy consulting.

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  • Zync Technology Logotype

    Zync Technology

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    10% Web Development
    10% Content Marketing
    10% Digital Strategy +7
    10% E-Commerce Development
    10% Graphic Design
    10% Mobile App Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Video Marketing

    Focus Areas

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

    Zync Technology is a Digital Strategy company established in 2023. The agency provides Digital Strategy and Social Media Marketing.

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  • Woxifi Logotype

    Woxifi

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Cloud Consulting & SI
    20% Cybersecurity +2
    20% IT Managed Services
    20% IT Strategy Consulting

    Focus Areas

    10% JavaScript
    25% Python
    15% C++ +4
    15% HTML5
    15% Rust
    10% Go
    10% Java

    Woxifi is a small IT strategy consulting company in Chicago, Illinois. Their services include IT strategy consulting and cloud consulting & SI.

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  • Smaint Solutions Logotype

    Smaint Solutions

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    10% Web Development
    15% Branding
    15% Custom Software Development +6
    10% Graphic Design
    10% IT Strategy Consulting
    10% Mobile App Development
    10% Product Design
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    25% Typescript
    15% HTML5 +6
    10% Redux
    10% SQL
    5% AJAX
    5% Python
    5% Swift
    5% XML

    Smaint Solutions is a branding company. The small Mumbai, India-based team offers Branding and Custom Software Development. The company was founded in 2020.

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  • Point3 Software Ltd. Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    55% Custom Software Development
    20% Mobile App Development +1
    5% E-Commerce Development

    Focus Areas

    10% JavaScript
    25% Java
    25% Typescript +4
    15% Rust
    10% HTML5
    10% Kotlin
    5% C#

    Point3 Software Ltd. Is a custom software development firm. The North Hykeham, England-based agency was established in 2010. Their team focuses on Custom Software Development and Web Development.

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  • NIZWAS IT SOLUTIONS Logotype

    NIZWAS IT SOLUTIONS

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Direct Marketing
    15% E-Commerce Development +5
    10% Graphic Design
    10% UX/UI Design
    5% Advertising
    5% Social Media Marketing
    5% Web Design

    Focus Areas

    10% JavaScript
    60% PHP
    15% AJAX +1
    15% SQL

    Founded in 2015, NIZWAS IT SOLUTIONS is a Direct Marketing company. Their team specializes in Direct Marketing and Web Development.

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  • NBG TECHNOLOGIES Logotype

    NBG TECHNOLOGIES

    Not yet reviewed

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

    Services provided

    15% Web Development
    10% BI & Big Data Consulting & SI
    10% Custom Software Development +11
    10% Cybersecurity
    10% Low/No Code Development
    5% AI Development
    5% Affiliate Marketing
    5% Application Management & Support
    5% Content Marketing
    5% Digital Strategy
    5% IT Strategy Consulting
    5% Mobile & App Marketing
    5% Mobile App Development
    5% Social Media Marketing

    Focus Areas

    15% JavaScript
    20% PHP
    15% SQL +8
    10% AJAX
    10% Python
    5% C
    5% C#
    5% HTML5
    5% Typescript
    5% Visual Basic
    5% XML

    NBG TECHNOLOGIES is a software development firm. They are based in Abuja, Nigeria. Their team provides Custom Software Development and Web Development.

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  • Outform Logotype

    Outform

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% UX/UI Design
    20% Branding +3
    10% Low/No Code Development
    10% Mobile App Development
    10% Web Design

    Focus Areas

    20% JavaScript
    20% Swift
    15% Typescript +6
    15% XML
    10% Kotlin
    5% AJAX
    5% HTML5
    5% Java
    5% Objective C

    Outform is an UX agency. The Jeddah, Saudi Arabia-based company was founded in 2022. Their services include UX/UI Design and Branding.

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  • Arti8 Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    40% AI Development
    40% Custom Software Development

    Focus Areas

    10% JavaScript
    80% Python
    10% Typescript

    Arti8 is a custom software development firm founded in 2023. The agency focuses on Custom Software Development and Artificial Intelligence, and is small.

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  • NettCore Logotype

    NettCore

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% Custom Software Development
    15% Mobile App Development +6
    10% AI Development
    10% Generative AI
    10% IT Staff Augmentation
    10% Product Design
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% C#
    15% HTML5 +5
    10% ASP.NET
    10% Other programming & scripting languages
    10% SQL
    10% Typescript
    5% Redux

    NettCore, a software development firm, is based in Karachi, Pakistan. The team offers Custom Software Development and Mobile App Development.

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  • iViReal Logotype

    Not yet reviewed

    $5,000+
    < $25 / hr
    2 - 9
    Ioannina, Greece

    Services provided

    15% Web Development
    70% AR/VR Development
    15% Generative AI

    Focus Areas

    15% JavaScript
    40% HTML5
    20% Other programming & scripting languages +3
    15% Typescript
    5% Java
    5% jquery

    IViReal, an AR/VR development company, was founded in 2017. The company specializes in AR/VR development and Generative AI.

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  • Swapnil Desai Logotype

    Swapnil Desai

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% AI Consulting
    10% Advertising +7
    10% Custom Software Development
    10% E-Commerce Development
    10% Media Planning & Buying
    10% Mobile App Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

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

    Swapnil Desai, an Advertising company, is based in Dar es Salaam, Tanzania and Dar es salaam, Tanzania. They specialize in Advertising and Media Planning & Buying.

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  • KloudWaves Technologies Inc. Logotype

    KloudWaves Technologies Inc.

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% Custom Software Development
    10% API Development +7
    10% Application Management & Support
    10% Application Testing
    10% DevOps Managed Services
    10% Digital Engineering
    10% Mobile App Development
    5% IT Managed Services
    5% IT Strategy Consulting

    Focus Areas

    20% JavaScript
    20% Java
    20% SQL +6
    10% ASP.NET
    10% C#
    5% Go
    5% HTML5
    5% Typescript
    5% XML

    KloudWaves Technologies Inc. Is a software development company. They offer Custom Software Development and Web Development and are headquartered in Toronto, Canada.

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  • Apex021 Logotype

    Apex021

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Application Testing
    20% DevOps Managed Services +3
    20% Mobile App Development
    10% Custom Software Development
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP.NET +7
    10% C
    10% C#
    10% C++
    10% Java
    10% Python
    10% Redux
    10% SQL

    Apex021 is a software development company. The Toronto, Canada-based firm was founded in 2023. Their services include Custom Software Development and Web Development.

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  • Miziniti Branding, Development & Artificial Intelligence Logotype

    Miziniti Branding, Development & Artificial Intelligence

    Not yet reviewed

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

    Services provided

    10% Web Development
    12% Low/No Code Development
    10% Web Design +13
    6% AI Consulting
    6% AI Development
    6% API Development
    6% AR/VR Development
    6% E-Commerce Development
    6% Generative AI
    6% Graphic Design
    6% Logo
    6% Packaging Design
    6% Product Design
    6% UX/UI Design
    1% Custom Software Development
    1% Mobile App Development

    Focus Areas

    20% JavaScript
    50% Python
    10% SQL +3
    10% Swift
    5% Other programming & scripting languages
    5% Typescript

    Miziniti Branding, Development & Artificial Intelligence is a web design agency. Their small team is based in Dubai, United Arab Emirates. Their services include Web Design and Web Development.

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  • Veldex GmbH Logotype

    Veldex GmbH

    Not yet reviewed

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

    Services provided

    20% Web Development
    25% AI Development
    20% Mobile App Development +3
    15% Low/No Code Development
    10% API Development
    10% Custom Software Development

    Focus Areas

    10% JavaScript
    20% Typescript
    15% HTML5 +5
    15% SQL
    10% C#
    10% Java
    10% Redux
    10% Rust

    Veldex GmbH is a website development company based in Wien, Austria. Their services include Web Development and Artificial Intelligence.

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  • Media Avenue Logotype

    Media Avenue

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    20% Cybersecurity
    20% Mobile App Development +3
    20% Search Engine Optimization
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    10% JavaScript
    20% PHP
    15% Python +5
    15% SQL
    15% Visual Basic
    10% C++
    10% Java
    5% Ember.js

    Media Avenue, a SEO services firm, is headquartered in Alger, Algeria. They specialize in Search Engine Optimization and Web Design and were launched in 2022.

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  • EXCELAPPS IT SOLUTIONS LTD Logotype

    EXCELAPPS IT SOLUTIONS LTD

    Not yet reviewed

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

    Services provided

    15% Web Development
    15% Branding
    15% Mobile App Development +5
    15% UX/UI Design
    10% AI Development
    10% Application Testing
    10% BI & Big Data Consulting & SI
    10% IT Managed Services

    Focus Areas

    15% JavaScript
    10% HTML5
    10% Other programming & scripting languages +8
    10% PHP
    10% Python
    10% Redux
    10% SQL
    10% Typescript
    5% AJAX
    5% XML
    5% jquery

    Launched in 2023, EXCELAPPS IT SOLUTIONS LTD is a small branding firm. Their services include Branding and UX/UI Design.

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  • Nifty Laboratory Logotype

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    2 - 9
    Prague, Czech Republic

    Services provided

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

    Focus Areas

    20% JavaScript
    25% HTML5
    20% jquery +5
    10% PHP
    10% SQL
    5% Ember.js
    5% Python
    5% Swift

    In Prague, Czech Republic, Nifty Laboratory is a SEO services firm. They focus on Search Engine Optimization and Web Development.

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  • The Ant Firm, Ltd. Logotype

    The Ant Firm, Ltd.

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Branding
    10% Custom Software Development +7
    10% Graphic Design
    10% Mobile App Development
    10% Print Design
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

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

    The Ant Firm, Ltd. Is a branding firm based in Toronto, Canada. They provide Branding and Social Media Marketing and were established in 2023.

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  • Warenex Logotype

    Warenex

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    30% ASP.NET
    30% C# +5
    10% SQL
    5% AJAX
    5% HTML5
    5% Redux
    5% Typescript

    Warenex is a software development company. The team offers Custom Software Development and Web Development, and the agency is located in Sofia, Bulgaria.

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  • TECHMELON Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% Blockchain
    20% Custom Software Development +4
    20% IT Strategy Consulting
    10% AI Development
    10% Application Management & Support
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    30% Java
    20% Typescript +3
    15% Redux
    10% SQL
    5% AJAX

    Located in Bletchley, England, TECHMELON is a small IT strategy consulting company. The team focuses on IT strategy consulting and Custom Software Development.

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  • Deploi Logotype

    Deploi

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    20% E-Commerce Development +3
    20% Mobile App Development
    10% DevOps Managed Services
    10% Product Design

    Focus Areas

    10% JavaScript
    20% C++
    20% Python +3
    20% Swift
    20% Typescript
    10% Java

    Deploi, a custom software development company, is based in. Their services include Custom Software Development and Web Development.

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  • Dynamic Logo Design Logotype

    Dynamic Logo Design

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Branding
    10% Content Writing Services +7
    10% E-Commerce Development
    10% Graphic Design
    10% Logo
    10% Other Design
    10% Packaging Design
    10% Product Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% C++
    20% HTML5 +2
    20% PHP
    20% Python

    Dynamic Logo Design is a small branding agency located in Bakersfield, California. Their services include Branding and Web Design.

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  • Interbits Logotype

    Interbits

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    20% PHP
    10% AJAX +10
    10% HTML5
    10% SQL
    5% C
    5% Ember.js
    5% Other programming & scripting languages
    5% Python
    5% Redux
    5% XML
    5% backbone.js
    5% jquery

    Interbits is a custom software development company. The team focuses on Custom Software Development and Web Development and is in Zapopan, Mexico.

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  • Click 2 Client Logotype

    Click 2 Client

    Not yet reviewed

    $1,000+
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    15% Social Media Marketing
    10% Branding +8
    10% Digital Strategy
    10% Graphic Design
    10% Logo
    5% Content Marketing
    5% Direct Marketing
    5% Marketing Strategy
    5% Product Design
    5% Video Production

    Focus Areas

    10% JavaScript
    40% PHP
    15% Java +5
    10% C#
    10% HTML5
    5% C++
    5% Python
    5% Visual Basic

    Founded in 2023, Click 2 Client is a web development company. Their team focuses on Web Development and Social Media Marketing.

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  • Nandan Global Logotype

    Nandan Global

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% AI Development
    15% E-Commerce Development +5
    15% Enterprise App Modernization
    15% Mobile App Development
    10% Custom Software Development
    10% Low/No Code Development
    5% Digital Strategy

    Focus Areas

    20% JavaScript
    25% PHP
    20% Python +4
    20% jquery
    5% AJAX
    5% SQL
    5% Swift

    Nandan Global, a small artificial intelligence company, is based in Jaunpur, India. The team specializes in Artificial Intelligence and Custom Software Development.

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  • JVM Infotech Logotype

    JVM Infotech

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    10% Web Development
    30% Custom Software Development
    10% API Development +5
    10% E-Commerce Development
    10% Enterprise App Modernization
    10% IT Strategy Consulting
    10% Mobile App Development
    10% Other Application Development

    Focus Areas

    20% JavaScript
    20% C#
    20% Java +4
    15% Typescript
    15% Visual Basic
    5% Kotlin
    5% Other programming & scripting languages

    JVM Infotech is an Ahmedabad, India-based software development firm. Their services include Custom Software Development and IT strategy consulting.

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  • SEOLancers Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9
    Ahmedabad, India

    Services provided

    15% Web Development
    15% Search Engine Optimization
    10% Content Marketing +9
    10% Other Digital Marketing
    10% Pay Per Click
    10% Social Media Marketing
    5% E-Commerce Development
    5% Ecommerce Marketing
    5% Graphic Design
    5% Logo
    5% UX/UI Design
    5% Web Design

    Focus Areas

    15% JavaScript
    50% HTML5
    25% PHP +1
    10% Other programming & scripting languages

    Based in Ahmedabad, India, SEOLancers is a SEO agency. Established in 2024, the team provides Search Engine Optimization and Web Development.

    Read more
    View Profile
  • PeakClicks Agency Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    2 - 9
    Weil am Rhein, Germany

    Services provided

    10% Web Development
    30% Search Engine Optimization
    15% Pay Per Click +7
    10% Custom Software Development
    10% E-Commerce Development
    5% Digital Strategy
    5% Ecommerce Marketing
    5% Mobile App Development
    5% UX/UI Design
    5% Web Design

    Focus Areas

    20% JavaScript
    50% PHP
    10% SQL +4
    5% AJAX
    5% HTML5
    5% XML
    5% jquery

    PeakClicks Agency is a SEO company. They were established in 2024, and their services include Search Engine Optimization and Pay Per Click.

    Read more
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  • Black Sails Logotype

    Not yet reviewed

    $5,000+
    $150 - $199 / hr
    2 - 9
    Pyrmont, Australia

    Services provided

    10% Web Development
    30% E-Commerce Development
    20% CRM Consulting and SI +3
    20% Mobile App Development
    10% Custom Software Development
    10% Low/No Code Development

    Focus Areas

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

    Black Sails is an e-commerce development company. Established in 2023, the agency is headquartered in Pyrmont, Australia. Their team provides E-Commerce Development and CRM consulting and SI.

    Read more
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  • BitsHive The Next-Gen Partner Blockchain | Mobile | Web Logotype

    Not yet reviewed

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

    Services provided

    15% Web Development
    20% Blockchain
    20% DevOps Managed Services +5
    10% Custom Software Development
    10% IT Strategy Consulting
    10% Low/No Code Development
    10% Mobile App Development
    5% AI Development

    Focus Areas

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

    BitsHive The Next-Gen Partner Blockchain | Mobile | Web is a custom software development company. They focus on Custom Software Development and Blockchain and were established in 2021.

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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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