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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

21,442 Companies

Programming & Scripting: JavaScript

List of the Top JavaScript Development Companies

  • Featured

    What are Featured Providers?

    Digis, a Fiverr company (NYSE: FVRR) Logotype

    Digis, a Fiverr company (NYSE: FVRR)

    4.9 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
    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.

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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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    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

    Average Project Cost Breakdown

    $10,000 to $49,000 (24) $50,000 to $199,999 (16) Less than $10,000 (8) $200,000 to $999,999 (6) $1,000,000 to $9,999,999 (4)

    What Clients Have Said

    Clients consistently praised Digis for their competitive pricing and strong value for money. Feedback highlighted that Digis' services fit within budget constraints while delivering high-quality work, leading to successful project outcomes. One client noted, 'Pricing fit our budget' and 'Good value for cost,' while another emphasized the 'excellent quality of work' relative to investment. Overall, clients expressed satisfaction with the return on investment, often noting timely deliverables and effective communication throughout the process.
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    $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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  • EBRII Logotype

    EBRII

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    15% JavaScript
    20% HTML5
    20% jquery +4
    15% SQL
    10% AJAX
    10% C#
    10% PHP

    Established in 2023, EBRII is an IT strategy consulting company. Their team provides IT strategy consulting and IT managed services.

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  • Techserw Labs Logotype

    Not yet reviewed

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

    Services provided

    25% Web Development
    25% API Development
    25% Custom Software Development +1
    25% Mobile App Development

    Focus Areas

    10% JavaScript
    15% C#
    15% HTML5 +6
    10% Java
    10% Kotlin
    10% PHP
    10% Redux
    10% SQL
    10% Swift

    Techserw Labs, a custom software development firm, is in Colombo, Sri Lanka. They offer Custom Software Development and Web Development and were launched in 2022.

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  • Dazbyte IT Solutions LLP Logotype

    Dazbyte IT Solutions LLP

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    20% Web Development
    20% Application Testing
    20% E-Commerce Development +2
    20% IoT Development
    20% Mobile App Development

    Focus Areas

    15% JavaScript
    15% PHP
    15% Redux +5
    15% SQL
    15% Typescript
    10% ASP.NET
    10% HTML5
    5% AJAX

    Dazbyte IT Solutions LLP is a website development company founded in 2024. The agency provides Web Development and Mobile App Development, and is small.

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  • Thara Systems Logotype

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    15% JavaScript
    20% PHP
    15% Java +8
    10% Go
    10% HTML5
    5% AJAX
    5% Kotlin
    5% Redux
    5% SQL
    5% Typescript
    5% jquery

    Based in Kampala, Uganda, Thara Systems is a software development company. They provide Custom Software Development and Web Development.

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  • Fullstacktics Logotype

    Fullstacktics

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% AI Development
    20% Custom Software Development +2
    20% Generative AI
    20% Other Application Development

    Focus Areas

    15% JavaScript
    40% Typescript
    25% Rust +2
    10% Python
    10% Redux

    Fullstacktics is a custom software development firm. The small New Delhi, India-based team offers Custom Software Development and Web Development. The agency was established in 2025.

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  • Granoble Infosystem Private Limited Logotype

    Granoble Infosystem Private Limited

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    15% JavaScript
    25% Python
    20% Kotlin +2
    20% SQL
    20% Swift

    UX agency Granoble Infosystem Private Limited is in Hyderabad, India. They provide UX/UI Design and Custom Software Development.

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  • Notus Digital Logotype

    Not yet reviewed

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

    Services provided

    25% Web Development
    25% Conversion Optimization
    25% Search Engine Optimization +1
    25% Web Design

    Focus Areas

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

    Notus Digital, a Conversion Optimization company, was founded in 2024. The firm focuses on Conversion Optimization and Search Engine Optimization.

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  • Brand Grids Logotype

    Brand Grids

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    15% JavaScript
    20% Java
    20% Kotlin +3
    20% SQL
    15% Python
    10% PHP

    Brand Grids, a branding agency, was established in 2023. They specializes in Branding and Web Design.

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  • Anggora Logotype

    Anggora

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    15% JavaScript
    15% Typescript
    10% HTML5 +6
    10% Java
    10% Kotlin
    10% Other programming & scripting languages
    10% Rust
    10% SQL
    10% Swift

    Anggora is a small Ankara, Türkiye-based user experience design company. The team focuses on UX/UI Design and Product Design.

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  • Cognito Technologies Logotype

    Cognito Technologies

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% AI Consulting
    20% Graphic Design +2
    20% Print Design
    20% UX/UI Design

    Focus Areas

    15% JavaScript
    65% Ruby
    10% Python +1
    10% Swift

    Cognito Technologies is an user experience design company. They are headquartered in Singapore, Singapore and Bilbao, Spain and have small team. They focus on UX/UI Design and Graphic Design.

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  • zeecomedia Logotype

    zeecomedia

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    2 - 9

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Mobile App Development +4
    10% AI Consulting
    10% AI Development
    10% API Development
    10% Web Design

    Focus Areas

    15% JavaScript
    30% Python
    25% AJAX +2
    25% SQL
    5% Rust

    Established in 2025, zeecomedia is a software development firm. The team specializes in Custom Software Development and Web Development and is in Ikeja, Nigeria.

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  • J-IT Engineering Logotype

    J-IT Engineering

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% AR/VR Development
    20% Application Management & Support +2
    20% Application Testing
    20% IT Strategy Consulting

    Focus Areas

    15% JavaScript
    15% C
    15% C++ +6
    15% Python
    10% HTML5
    10% Java
    10% Typescript
    5% SQL
    5% XML

    J-IT Engineering, an IT strategy consulting company, is located in Sfax, Tunisia. The team focuses on IT strategy consulting and Web Development.

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  • Ichter Logotype

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    2 - 9
    Miami, FL

    Services provided

    20% Web Development
    30% Custom Software Development
    20% AI Development +3
    15% Mobile App Development
    10% UX/UI Design
    5% Enterprise App Modernization

    Focus Areas

    15% JavaScript
    35% Python
    20% SQL +2
    15% HTML5
    15% Typescript

    Ichter, a small custom software development firm, is in Miami, Florida. Their services include Custom Software Development and Web Development.

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  • NoorSphere Logotype

    NoorSphere

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    25% Web Development
    25% AI Development
    25% Custom Software Development +1
    25% Mobile App Development

    Focus Areas

    10% JavaScript
    50% Python
    30% Typescript +1
    10% Other programming & scripting languages

    In London, England and Tiranë, Albania, NoorSphere is a software development company. They provide Custom Software Development and Web Development and were founded in 2025.

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  • Skypo Digital Logotype

    Skypo Digital

    Not yet reviewed

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

    Services provided

    15% Web Development
    30% Web Design
    20% Application Management & Support +3
    15% Search Engine Optimization
    10% Content Marketing
    10% Pay Per Click

    Focus Areas

    20% JavaScript
    45% PHP
    10% HTML5 +3
    10% Python
    10% Typescript
    5% Other programming & scripting languages

    Web design company Skypo Digital was launched in 2011. The team focuses on Web Design and Application Management & Support and is headquartered in Casula, Australia.

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  • Code Pranetra Logotype

    Code Pranetra

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% AI Development
    20% Custom Software Development +2
    20% DevOps Managed Services
    20% Mobile App Development

    Focus Areas

    15% JavaScript
    15% Typescript
    10% HTML5 +9
    10% PHP
    10% Python
    10% jquery
    5% ASP
    5% ASP.NET
    5% C#
    5% Java
    5% Other programming & scripting languages
    5% XML

    Code Pranetra is a software development firm based in Udaipur, India. They specialize in Custom Software Development and Web Development and were launched in 2024.

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  • Neolite Development Logotype

    Neolite Development

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    15% JavaScript
    45% Typescript
    25% Python +1
    15% HTML5

    Neolite Development is a software development company. The team is located in Calgary, Canada, and their services include Custom Software Development and Web Development.

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  • W-MAX Logotype

    W-MAX

    Not yet reviewed

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

    Services provided

    20% Web Development
    10% Content Marketing
    10% Custom Software Development +6
    10% E-Commerce Development
    10% Ecommerce Marketing
    10% Other Digital Marketing
    10% Pay Per Click
    10% Search Engine Optimization
    10% Web Design

    Focus Areas

    15% JavaScript
    30% PHP
    15% AJAX +4
    15% SQL
    10% Python
    10% jquery
    5% HTML5

    Established in 2015, W-MAX is a small web development firm. Their team specializes in Web Development and Content Marketing.

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  • Faber Soft Logotype

    Faber Soft

    Not yet reviewed

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

    Services provided

    25% Web Development
    25% Enterprise App Modernization
    20% Custom Software Development +2
    20% Mobile App Development
    10% DevOps Managed Services

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% C# +4
    15% SQL
    15% Typescript
    10% HTML5
    10% Java

    Faber Soft is a web development company. Based in Sarajevo, Bosnia and Herzegovina, the agency was founded in 2021. Their team offers Web Development and Enterprise App Modernization.

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  • Agile Developers Logotype

    Agile Developers

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% AI Agents
    15% Custom Software Development +4
    10% AI Development
    10% Microservices Architecture Services
    10% Web Design
    5% Mobile App Development

    Focus Areas

    15% JavaScript
    40% Python
    25% Typescript +2
    10% SQL
    10% jquery

    Agile Developers is an AI Agents company. Their small team is located in Lahore, Pakistan and focuses on AI Agents and Web Development. The firm was launched in 2024.

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  • SainTech Inc. Cameroon Logotype

    SainTech Inc. Cameroon

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    20% Custom Software Development
    20% IT Managed Services +2
    20% IT Strategy Consulting
    20% Web Design

    Focus Areas

    15% JavaScript
    25% PHP
    15% SQL +6
    10% Java
    10% Python
    10% Visual Basic
    5% C#
    5% C++
    5% Other programming & scripting languages

    Web design agency SainTech Inc. Cameroon is based in Kumba, Cameroon. Their services include Web Design and IT strategy consulting.

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  • Creators of the Moon Limited Logotype

    Not yet reviewed

    $25,000+
    $25 - $49 / hr
    2 - 9
    Auckland, New Zealand

    Services provided

    20% Web Development
    20% Cloud Consulting & SI
    20% Custom Software Development +2
    20% IT Strategy Consulting
    20% Mobile App Development

    Focus Areas

    15% JavaScript
    15% HTML5
    15% Kotlin +4
    15% Other programming & scripting languages
    15% Redux
    15% Typescript
    10% Java

    Creators of the Moon Limited is an IT strategy consulting company. Located in Auckland, New Zealand, the team specializes in IT strategy consulting and cloud consulting & SI.

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  • Aquilarion Nexus Logotype

    Aquilarion Nexus

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Cloud Consulting & SI
    20% Custom Software Development +2
    20% DevOps Managed Services
    20% Mobile App Development

    Focus Areas

    15% JavaScript
    20% C#
    20% SQL +4
    15% Python
    10% C++
    10% HTML5
    10% Typescript

    Aquilarion Nexus is a cloud consulting & SI company. Their small team of employees is located in Vijayawada, India. Their team offers cloud consulting & SI and Custom Software Development.

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  • CodeZorro Logotype

    CodeZorro

    5.0 2 reviews
    $10,000+
    $150 - $199 / hr
    10 - 49

    Services provided

    20% Web Development
    20% API Development
    20% E-Commerce Development +2
    20% Microservices Architecture Services
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    35% Java
    15% Python +6
    15% SQL
    5% C
    5% C++
    5% HTML5
    5% PHP
    5% jquery

    At CodeZorro, we specialize in crafting innovative software solutions that drive business growth and success. Established in 2022, our skilled developers and designers work closely with clients to

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    More responsive than most other service providers

    CodeZorro is very responsive

    They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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  • Devinn Solutions Logotype

    Devinn Solutions

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

    Services provided

    15% Web Development
    15% Custom Software Development
    15% E-Commerce Development +4
    15% Graphic Design
    15% Mobile App Development
    15% Web Design
    10% Marketing Strategy

    Focus Areas

    15% JavaScript
    25% HTML5
    20% Java +3
    20% PHP
    15% jquery
    5% SQL

    Devinn Solutions is a specialized agency that provides a range of technology-related services to businesses, organizations, or individuals. We are often comprised of skilled professionals with

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  • Nakshatra Namaha Creations Mysore Logotype

    5.0 1 review
    Undisclosed
    Undisclosed
    10 - 49
    Mysuru, India

    Services provided

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

    Focus Areas

    10% JavaScript
    10% C++
    10% Java +9
    10% Other programming & scripting languages
    10% PHP
    10% Python
    10% SQL
    10% XML
    5% Ember.js
    5% HTML5
    5% Typescript
    5% Visual Basic

    "Welcome to Nakshatra Namaha Creations. We are a prominent Website development company based in Mysore that specialises in various digital services. The company is recognised as one of the region's

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  • SYNERGISTIQUES Logotype

    SYNERGISTIQUES

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

    Services provided

    20% Web Development
    20% Mobile App Development
    20% Search Engine Optimization +3
    20% Web Design
    10% Graphic Design
    10% Other Digital Marketing

    Focus Areas

    10% JavaScript
    10% HTML5
    10% PHP +11
    10% Redux
    10% Typescript
    10% backbone.js
    5% AJAX
    5% Java
    5% Kotlin
    5% Other programming & scripting languages
    5% Python
    5% SQL
    5% Swift
    5% jquery

    Synergistiques is a results-driven creative studio offering comprehensive branding, web development, SEO, and digital marketing solutions for businesses across the UK, UAE, India, and beyond. We

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  • HSK Digitronix Technologies Logotype

    HSK Digitronix Technologies

    5.0 10 reviews
    $10,000+
    $25 - $49 / hr
    50 - 249

    Services provided

    15% Web Development
    20% Custom Software Development
    15% Mobile App Development +5
    10% AI Agents
    10% AI Development
    10% Cybersecurity
    10% IT Staff Augmentation
    10% Other Application Development

    Focus Areas

    10% JavaScript
    10% ASP
    10% ASP.NET +7
    10% HTML5
    10% Other programming & scripting languages
    10% PHP
    10% Python
    10% SQL
    10% XML
    10% jquery

    Driving Digital Growth with Scalable SolutionsHSK Digitronix Technologies is a full-service technology partner specializing in software development, mobile apps, web platforms, and cloud solutions.

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  • Saloopo Logotype

    5.0 1 review
    $5,000+
    $25 - $49 / hr
    10 - 49
    Sarajevo, Bosnia and Herzegovina

    Services provided

    15% Web Development
    15% E-Commerce Development
    15% IoT Development +5
    15% Mobile App Development
    10% Application Testing
    10% Custom Software Development
    10% Enterprise App Modernization
    10% IT Managed Services

    Focus Areas

    15% JavaScript
    15% Java
    15% Typescript +5
    15% XML
    10% Kotlin
    10% Other programming & scripting languages
    10% Python
    10% SQL

    Saloopo specializes in Website Development, offering comprehensive Web Design and Web Programming services. Their team, praised for professionalism and effective communication, successfully delivered a marketing website that met client expectations and positively impacted sales. Clients appreciate their timely project management and technical proficiency, highlighting their openness to discussion and availability throughout the development process.

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  • CozCore Technology Logotype

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

    Services provided

    10% Web Development
    40% Blockchain
    10% Custom Software Development +4
    10% IT Managed Services
    10% Low/No Code Development
    10% Mobile App Development
    10% Web Design

    Focus Areas

    20% JavaScript
    20% PHP
    10% Go +7
    10% SQL
    10% Typescript
    10% XML
    5% AJAX
    5% Kotlin
    5% Other programming & scripting languages
    5% Python

    CozCore Technology offers services in blockchain integration, specifically focusing on EVM-based chain integration and wallet services. Their reviews indicate a high level of technical expertise, making them a top provider in their area. Clients appreciate their project management and communication skills, although there is a desire for a local office to enhance collaboration.

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  • Dataflex Analytics Logotype

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

    Services provided

    20% Web Development
    25% BI & Big Data Consulting & SI
    15% Custom Software Development +5
    10% IT Staff Augmentation
    10% Low/No Code Development
    10% Mobile App Development
    5% AI Consulting
    5% UX/UI Design

    Focus Areas

    10% JavaScript
    40% SQL
    35% Python +2
    10% PHP
    5% C++

    Dataflex Analytics provides data analysis, Power BI automation, and email notification services, as illustrated by their work on cholera prediction cases for a medical company. The reviews praise Dataflex Analytics for their great delivery speed, professionalism, and exceptional customer service, highlighting their charisma, flexibility, and alignment with client values.

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  • SEOK Logotype

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

    Services provided

    10% Web Development
    60% Search Engine Optimization
    10% Pay Per Click +2
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    40% PHP
    15% HTML5 +2
    15% jquery
    10% AJAX

    SEOK specializes in Website Development and Web Design, offering comprehensive online development services including web programming, site customizations, and error elimination. Reviews highlight their professionalism, timely response, and successful project outcomes, with clients noting improved customer engagement and satisfaction following SEOK's interventions.

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  • Appelian Software Logotype

    4.5 1 review
    $5,000+
    $25 - $49 / hr
    10 - 49
    T'bilisi, Georgia

    Services provided

    20% Web Development
    40% Mobile App Development
    20% Custom Software Development +2
    10% Enterprise App Modernization
    10% IoT Development

    Focus Areas

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

    Appelian Software specializes in providing experienced Angular developers with strong technical and soft skills. Client feedback highlights their effective communication, despite occasional challenges, and the proficiency of their middle and senior specialists. Overall, clients appreciate their technical capabilities and suggest continuous improvement in communication and team expansion.

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  • Vasudev Technolabs Logotype

    Vasudev Technolabs

    4.5 1 review
    Undisclosed
    < $25 / hr
    10 - 49

    Services provided

    10% Web Development
    10% Custom Software Development
    10% Digital Strategy +8
    10% E-Commerce Development
    10% Mobile App Development
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design
    5% AI Development
    5% DevOps Managed Services

    Focus Areas

    20% JavaScript
    30% PHP
    15% jquery +5
    10% HTML5
    10% SQL
    5% AJAX
    5% Python
    5% XML

    Vasudev Technolabs specializes in Website Development, Web Design, and Online Development services, offering robust backend systems and mobile applications. Their reviews highlight exceptional project management, clear communication, and strong user engagement outcomes. Clients commend their responsiveness and attention to detail, though suggest improvements in initial estimates and onboarding processes.

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  • GET - Global Era Tech Logotype

    4.0 1 review
    $1,000+
    $25 - $49 / hr
    10 - 49
    Karachi, Pakistan

    Services provided

    20% Web Development
    20% AI Development
    20% Blockchain +2
    20% Mobile App Development
    20% Search Engine Optimization

    Focus Areas

    10% JavaScript
    15% Python
    15% SQL +6
    10% HTML5
    10% Kotlin
    10% PHP
    10% Ruby
    10% Swift
    10% Visual Basic

    GET is a technology solutions provider dedicated to transforming businesses through advanced AI, blockchain, Web3, and digital development services. Our team focuses on delivering customized,

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  • IT Systems Sp. z o.o. Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    10 - 49
    Chorzów, Poland

    Services provided

    20% Web Development
    30% Mobile App Development
    10% Custom Software Development +7
    10% UX/UI Design
    5% Application Management & Support
    5% Application Testing
    5% Enterprise App Modernization
    5% IT Strategy Consulting
    5% Other Application Development
    5% Web Design

    Focus Areas

    10% JavaScript
    50% Java
    10% ASP.NET +5
    10% SQL
    5% Other programming & scripting languages
    5% PHP
    5% Visual Basic
    5% XML

    IT Systems Sp. Z o.o. Is an application development company launched in 2014. The small team provides Mobile App Development and Web Development.

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  • TouchCrafters Logotype

    TouchCrafters

    Not yet reviewed

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

    Services provided

    15% Web Development
    25% Mobile App Development
    20% Custom Software Development +5
    10% Application Management & Support
    10% E-Commerce Development
    10% UX/UI Design
    5% Application Testing
    5% Enterprise App Modernization

    Focus Areas

    15% JavaScript
    15% Java
    15% PHP +9
    10% Objective C
    10% Swift
    5% AJAX
    5% ASP
    5% ASP.NET
    5% C#
    5% C++
    5% Other programming & scripting languages
    5% SQL

    TouchCrafters is a mobile app development company. They were founded in 2015 and focus on Mobile App Development and Custom Software Development.

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  • Endeken Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    10 - 49
    São Paulo, Brazil

    Services provided

    10% Web Development
    10% AI Development
    10% Custom Software Development +7
    10% E-Commerce Development
    10% Enterprise App Modernization
    10% IT Strategy Consulting
    10% Low/No Code Development
    10% Mobile App Development
    10% UX/UI Design
    10% Wearable App Development

    Focus Areas

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

    Software development firm Endeken was founded in 2014. The team focuses on Custom Software Development and UX/UI Design.

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  • Flawless99 deal Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    10 - 49
    Bengaluru, India

    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
    20% ASP.NET +7
    10% Other programming & scripting languages
    10% Visual Basic
    10% XML
    5% PHP
    5% Python
    5% SQL
    5% Swift

    Flawless99 deal is a software development company. Their small team is located in Bengaluru, India. Their services include Custom Software Development and Enterprise App Modernization.

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  • Leading IT Bangladesh Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    75% Web Design
    5% Branding

    Focus Areas

    10% JavaScript
    50% Other programming & scripting languages
    20% PHP +1
    20% XML

    Leading IT Bangladesh is a small web design company. Established in 2016, the team offers Web Design and Web Development.

    Read more
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  • Rise Line Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Custom Software Development
    10% E-Commerce Development +7
    10% Enterprise App Modernization
    10% Mobile & App Marketing
    10% Mobile App Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Wearable App Development

    Focus Areas

    20% JavaScript
    20% ASP.NET
    20% Ruby +4
    10% C#
    10% Kotlin
    10% PHP
    10% Swift

    Rise Line is a custom software development firm. Headquartered in Shlyakh, Ukraine, the agency was launched in 2018. Their team provides Custom Software Development and Enterprise App Modernization.

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  • Magure Inc Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    10 - 49
    Chadds Ford, PA

    Services provided

    10% Web Development
    30% Custom Software Development
    20% AI Development +4
    10% Blockchain
    10% IoT Development
    10% Mobile App Development
    10% Wearable App Development

    Focus Areas

    20% JavaScript
    20% Python
    10% Go +5
    10% Java
    10% Kotlin
    10% Redux
    10% Ruby
    10% Swift

    Magure Inc is a software development firm. The team focuses on Custom Software Development and Artificial Intelligence and is in Chadds Ford, Pennsylvania.

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  • Apphreak Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Mobile App Development
    10% Branding +7
    10% Custom Software Development
    10% E-Commerce Development
    10% Mobile & App Marketing
    5% Content Marketing
    5% Digital Strategy
    5% Social Media Marketing
    5% Wearable App Development

    Focus Areas

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

    Apphreak is an app development company launched in 2019. Their services include Mobile App Development and Web Development.

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  • LUsoft LLC Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Custom Software Development
    20% Mobile App Development +2
    15% Application Management & Support
    15% Application Testing

    Focus Areas

    10% JavaScript
    10% C#
    10% Java +16
    5% ASP
    5% ASP.NET
    5% C
    5% C++
    5% Go
    5% PHP
    5% Python
    5% SQL
    5% Swift
    5% Visual Basic
    5% XML
    4% Objective C
    3% AJAX
    3% Kotlin
    3% Redux
    2% Ember.js

    LUsoft LLC is a custom software development company located in Kyiv, Ukraine. Their services include Custom Software Development and Mobile App Development.

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  • Elephant Crew Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% Web Design
    10% Conversion Optimization +8
    10% Custom Software Development
    10% Digital Strategy
    10% E-Commerce Development
    10% Search Engine Optimization
    8% Product Design
    7% UX/UI Design
    5% CRM Consulting and SI
    5% Pay Per Click

    Focus Areas

    20% JavaScript
    20% HTML5
    20% PHP +4
    20% SQL
    10% Typescript
    5% ASP.NET
    5% XML

    Elephant Crew is a small web design agency. They provide Web Design and Digital Strategy and were founded in 2019.

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  • InovIT Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    22% Custom Software Development
    20% E-Commerce Development +9
    15% Mobile App Development
    10% Web Design
    5% Social Media Marketing
    2% Digital Strategy
    2% Mobile & App Marketing
    1% CRM Consulting and SI
    1% Cloud Consulting & SI
    1% ERP Consulting and SI
    1% Logo

    Focus Areas

    10% JavaScript
    40% Python
    10% AJAX +4
    10% C#
    10% Java
    10% PHP
    10% SQL

    InovIT is a software development firm. Their team is in Marrakesh, Morocco and provides Custom Software Development and E-Commerce Development.

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  • TechnoBren Infotech Private Limited Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    40% Custom Software Development
    20% Mobile App Development +2
    10% CRM Consulting and SI
    10% E-Commerce Development

    Focus Areas

    10% JavaScript
    70% PHP
    20% AJAX

    TechnoBren Infotech Private Limited is a custom software development firm based in Jaunpur, India. The team provides Custom Software Development and Mobile App Development.

    Read more
    View Profile
  • Digital Glyphs LLP Logotype

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    20% JavaScript
    30% PHP
    20% SQL +3
    10% AJAX
    10% Kotlin
    10% Swift

    SEO agency Digital Glyphs LLP is located in New Delhi, India. They focus on Search Engine Optimization and Social Media Marketing and were founded in 2017.

    Read more
    View Profile
  • Zon Tec Solutions Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Search Engine Optimization
    20% Web Design +4
    15% Other Digital Marketing
    15% Wearable App Development
    5% Digital Strategy
    5% Email Marketing

    Focus Areas

    10% JavaScript
    20% ASP.NET
    20% PHP +4
    20% Python
    10% Kotlin
    10% SQL
    10% XML

    Located in New Delhi, India, Zon Tec Solutions is a small SEO services firm. Their services include Search Engine Optimization and Web Design.

    Read more
    View Profile
  • InstaCloud Solutions Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% BI & Big Data Consulting & SI
    15% IT Managed Services +6
    10% Application Management & Support
    10% Cloud Consulting & SI
    10% Custom Software Development
    10% Enterprise App Modernization
    10% IT Strategy Consulting
    10% Unified Communications Consulting & SI

    Focus Areas

    20% JavaScript
    20% C#
    20% Typescript +3
    20% Visual Basic
    10% ASP.NET
    10% Other programming & scripting languages

    InstaCloud Solutions, a big data analytics company, was established in 2015. The team specializes in BI & big data consulting & SI and IT managed services.

    Read more
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At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.

Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.

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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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