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Top JavaScript Developers

JavaScript powers everything from interactive websites to complex enterprise applications. Partnering with an experienced JavaScript development agency ensures your product is fast, secure, and ready to scale. Clutch makes it easy to find trusted providers by publishing in-depth, verified client reviews and transparent performance data. Use our filters to sort agencies by budget, location, framework expertise, and more. Looking for regional specialists? Browse firms in the United States, United Kingdom, or Canada to compare portfolios and pricing in your market. Start exploring today and shortlist partners that align with your goals.
Ratings Updated: March 31, 2026
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15 Leaders 15 Contenders

21,831 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 89 reviews
    Premier Verified
    $5,000+
    $25 - $49 / hr
    50 - 249
    London, England

    Services provided

    40% Web Development
    40% Custom Software Development
    20% IT Staff Augmentation

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +7
    10% Java
    10% PHP
    10% Python
    10% Rust
    10% SQL
    10% Scala
    10% Swift

    Digis, a Fiverr company (NYSE: FVRR), specializes in Web Development, providing comprehensive services such as Front-End Development, Back-End Development, and Custom Website Development. Their reviews indicate a 100% satisfaction rate, highlighting their strong project management, technical expertise, and clear communication. Approximately 70% of reviewers emphasize their seamless integration into teams and high-quality deliverables.

    See all 89 projects

    Reviews mention Unique expertise

    The sentiment regarding Digis's unique expertise is overwhelmingly positive. Clients consistently highlight the depth of technical knowledge and proactive mindset of the team. For instance, one client praised Alex's ability to translate complex business needs into maintainable code, significantly enhancing architectural decisions. Another noted the engineers' exceptional communication and rapid talent sourcing, which consistently met project demands. Overall, clients appreciate the commitment to quality and the collaborative approach, viewing Digis as an integral part of their teams rather than just a vendor.
    • Full Stack Software Development for Software Company
      5.0 Mar 22, 2024

      Digi's project manager, Taniya, and the developers assigned to the project were very experts in their field, friendly, very accommodative, detailed, and willing to go the extra mile to meet our aggressive targets. Digi's project manager, Taniya, handed it very responsibly and on time, constantly bridging the gap between us and the developers. Can't ask for a better manager.

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    • Web & Mobile App Dev for Communication Software Co
      5.0 Mar 6, 2024

      The engineers from Digis are instrumental in maintaining our software and developing innovative features for both our web and mobile applications. What truly stood out was the exceptional communication, the rapidity in sourcing new talent, and the sheer expertise of the engineers they introduced to us. We were never disappointed, as they consistently provided support whenever we needed it.

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    • Custom Data-Driven Product Dev for Email Marketing Platform
      5.0 May 10, 2022

      The project built in high standards, high expertise, with advanced architecture and technologies. Team always suggested improvements and delivered on time. Bringing really great people, usually can find such dedication and good will with vendors as we found here.

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    • E-Commerce Dev for Digital Commerce Agency
      5.0 Mar 23, 2022

      Andriy shows interest in growth, he constantly asks questions, he looks for points of improvement and he is always interested to hear what others have to say about his implementation. In general, Andriy showed pretty strong development skill, he is a great asset to the team.

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    • Tracking Platform Dev for Telecommunications Firm
      4.5 Oct 15, 2020

      We communicate through Skype mainly, and the project management was doing very well. The skills of their developers are very good. Quick comms.

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

    Web Development PROJECT HIGHLIGHT

    Hosting Platform Development for Advertising & Marketing Co

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

    Average Project Cost Breakdown

    $10,000 to $49,000 (25) $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 have consistently praised the company's cost-effectiveness and value for money. Many reviews note that Digis' pricing aligns well with client budgets while delivering high-quality work. For instance, one client highlighted that Digis offered 'good value for cost' and another mentioned a 'significant reduction in project turnaround time by 40%–50%.' Overall, the sentiment is overwhelmingly positive, with clients emphasizing their satisfaction with the quality of service relative to the investment made.
    Read All 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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  • 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.

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  • 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.

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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.

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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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  • Devyuga Software Solutions Inc Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    40% Custom Software Development
    20% AI Development +1
    20% Cloud Consulting & SI

    Focus Areas

    10% JavaScript
    40% Python
    15% Other programming & scripting languages +3
    15% Typescript
    10% C++
    10% SQL

    Devyuga Software Solutions Inc is a small Calgary, Canada-based software development firm. Their services include Custom Software Development and cloud consulting & SI.

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  • UPWeb Services Logotype

    UPWeb Services

    Not yet reviewed

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

    Services provided

    10% Web Development
    40% Web Design
    10% Low/No Code Development +7
    10% Social Media Marketing
    5% Application Management & Support
    5% Business Consulting
    5% IT Managed Services
    5% Market Research
    5% Search Engine Optimization
    5% UX/UI Design

    Focus Areas

    20% JavaScript
    50% PHP
    10% HTML5 +4
    10% Java
    8% C++
    1% Typescript
    1% XML

    UPWeb Services, a web design company, is in Durrës, Albania. The team provides Web Design and Social Media Marketing.

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  • AppHammer Logotype

    Not yet reviewed

    $25,000+
    $150 - $199 / hr
    2 - 9
    Syracuse, NY

    Services provided

    20% Web Development
    20% Custom Software Development
    10% AI Consulting +5
    10% AI Development
    10% Cloud Consulting & SI
    10% Computer Engineering
    10% DevOps Managed Services
    10% Mobile App Development

    Focus Areas

    10% JavaScript
    15% Python
    15% SQL +8
    10% C#
    10% HTML5
    10% Objective C
    10% PHP
    5% ASP.NET
    5% Kotlin
    5% Swift
    5% Visual Basic

    AppHammer is a custom software development firm. In Syracuse, New York, the firm was established in 2014. Their team focuses on Custom Software Development and Web Development.

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  • Rawaj AL-Itqan IT Logotype

    Rawaj AL-Itqan IT

    Not yet reviewed

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

    Services provided

    15% Web Development
    15% Building Security Services
    15% DevOps Managed Services +5
    15% Mobile App Development
    10% AI Development
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Web Design

    Focus Areas

    15% JavaScript
    35% Python
    20% SQL +3
    10% AJAX
    10% HTML5
    10% Kotlin

    Rawaj AL-Itqan IT, a web development firm, was launched in 2024. Headquartered in Riyadh, Saudi Arabia, the team specializes in Web Development and Mobile App Development.

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  • Sharp IT Group Logotype

    Sharp IT Group

    Not yet reviewed

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

    Services provided

    20% Web Development
    25% Branding
    15% Advertising +4
    10% Custom Software Development
    10% IT Managed Services
    10% IT Strategy Consulting
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    10% C#
    10% Java +11
    10% PHP
    10% Python
    10% SQL
    5% ASP
    5% ASP.NET
    5% C
    5% ColdFusion
    5% HTML5
    5% XML
    5% backbone.js
    5% jquery

    Sharp IT Group is a Faisalabad, Pakistan-based branding firm. Founded in 2016, the team offers Branding and Custom Software Development.

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  • Cerberus Research, Inc Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    2 - 9
    Shibuya City, Japan

    Services provided

    20% Web Development
    20% Architectural Design
    20% Blockchain +2
    20% Generative AI
    20% Web Design

    Focus Areas

    10% JavaScript
    40% Python
    40% Typescript +1
    10% Rust

    Web design company Cerberus Research, Inc was launched in 2021. The small team specializes in Web Design and Architectural Design.

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  • Fixefly Logotype

    Fixefly

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    20% JavaScript
    30% PHP
    20% SQL +3
    10% HTML5
    10% Python
    10% jquery

    Branding firm Fixefly was established in 2022. The team focuses on Branding and UX/UI Design.

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  • Figle Technologies Private Limited Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    50% Mobile App Development
    10% Custom Software Development +3
    10% Low/No Code Development
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% HTML5
    20% PHP +5
    10% Redux
    10% Swift
    10% Typescript
    5% Kotlin
    5% SQL

    Figle Technologies Private Limited is an application development company. Their small team is based in Raipur, India. Their services include Mobile App Development and Web Development.

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  • One Prose digital Solutions Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Branding
    20% Conversion Optimization +3
    20% Mobile App Development
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    10% JavaScript
    35% Python
    15% PHP +4
    10% Kotlin
    10% Ruby
    10% SQL
    10% Swift

    One Prose digital Solutions, a branding agency, is in Tanger, Morocco and Tanger, Morocco. They focus on Branding and Conversion Optimization and were launched in 2022.

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  • NGS Technologies Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% Branding
    20% Mobile App Development +3
    20% Search Engine Optimization
    20% Social Media Marketing
    10% Low/No Code Development

    Focus Areas

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

    Founded in 2017, NGS Technologies is a branding company. Their team specializes in Branding and Social Media Marketing.

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  • Brandiv Labs LLC Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    40% Custom Software Development
    15% Mobile App Development +3
    10% E-Commerce Development
    10% UX/UI Design
    5% Application Testing

    Focus Areas

    10% JavaScript
    30% PHP
    15% HTML5 +5
    10% AJAX
    10% Kotlin
    10% SQL
    10% Swift
    5% jquery

    Brandiv Labs LLC is a Miami Beach, Florida-based software development company. Their services include Custom Software Development and Web Development.

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  • Saas Building Logotype

    Saas Building

    Not yet reviewed

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

    Services provided

    10% Web Development
    15% AI Consulting
    15% Generative AI +6
    10% AI Development
    10% Conversion Optimization
    10% Low/No Code Development
    10% Marketing Strategy
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    60% Python
    10% SQL +1
    10% Typescript

    Saas Building is a website development firm. The small Beaverton, Oregon-based team provides Web Development and Artificial Intelligence. The firm was established in 2024.

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  • QOSQO IT Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Tallinn, Estonia

    Services provided

    10% Web Development
    20% AI Consulting
    20% Cloud Consulting & SI +3
    20% Cybersecurity
    20% IT Managed Services
    10% Low/No Code Development

    Focus Areas

    20% JavaScript
    30% SQL
    20% PHP +2
    20% Python
    10% Java

    QOSQO IT, a cloud consulting & SI company, was established in 2020. The team provides cloud consulting & SI and Cybersecurity.

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  • Galaxy Web Services Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% E-Commerce Development
    20% Mobile App Development +4
    10% API Development
    10% Custom Software Development
    10% Product Design
    10% Search Engine Optimization

    Focus Areas

    10% JavaScript
    20% AJAX
    20% PHP +3
    20% SQL
    15% Objective C
    15% Swift

    Galaxy Web Services is a website development company. The team is located in Ahmedabad, India, and their services include Web Development and Mobile App Development.

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  • Hashnaut Logotype

    Hashnaut

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% API Development
    10% Blockchain +7
    10% Custom Software Development
    10% DevOps Managed Services
    10% Enterprise App Modernization
    10% Generative AI
    10% IT Staff Augmentation
    10% Microservices Architecture Services
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    20% Typescript
    15% Python +4
    15% Redux
    15% SQL
    10% HTML5
    5% Ember.js

    Hashnaut is an IT staff augmentation company in Woodbridge, Virginia. They provide IT staff augmentation and Custom Software Development.

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  • Winget Software Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Mobile App Development +4
    15% UX/UI Design
    15% Web Design
    5% AI Development
    5% Cloud Consulting & SI

    Focus Areas

    10% JavaScript
    10% AJAX
    10% HTML5 +7
    10% Java
    10% Kotlin
    10% Objective C
    10% PHP
    10% Python
    10% SQL
    10% Swift

    Winget Software is a software development company. They are headquartered in Alvorada, Brazil, and their services include Custom Software Development and Web Development.

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  • Ocoxe Logotype

    Ocoxe

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    10% Web Development
    20% E-Commerce Development
    20% Mobile App Development +3
    20% Search Engine Optimization
    20% UX/UI Design
    10% Low/No Code Development

    Focus Areas

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

    Ocoxe is a SEO company. Located in Khulna, Bangladesh, the team provides Search Engine Optimization and UX/UI Design.

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  • SSIT Technology Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    30% API Development
    20% E-Commerce Development +4
    10% Custom Software Development
    10% IoT Development
    10% Low/No Code Development
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    20% HTML5
    20% Python +3
    20% SQL
    15% Go
    5% Redux

    SSIT Technology is an API Development company founded in 2024. The company provides API Development and Web Development, and is small.

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  • PhCodes - Powerful High Class Codes Logotype

    PhCodes - Powerful High Class Codes

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% AI Development
    20% Microservices Architecture Services +3
    20% Mobile App Development
    10% Custom Software Development
    10% Low/No Code Development

    Focus Areas

    10% JavaScript
    45% Java
    20% Typescript +2
    15% Objective C
    10% Go

    Based in Parma, Italy and Parma, Italy, PhCodes - Powerful High Class Codes is a small software development firm. Their services include Custom Software Development and Web Development.

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  • Mindsync Consulting Pvt Ltd Logotype

    Not yet reviewed

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

    Services provided

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

    Focus Areas

    10% JavaScript
    10% AJAX
    10% Ember.js +7
    10% HTML5
    10% Kotlin
    10% PHP
    10% Python
    10% Redux
    10% Swift
    10% Visual Basic

    Mindsync Consulting Pvt Ltd, a small web design company, is located in New Delhi, India. The team provides Web Design and UX/UI Design.

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  • Synatech Solutions Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Application Management & Support
    20% Custom Software Development +2
    20% Mobile App Development
    20% Robotics Process Automation

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +8
    10% Java
    10% Objective C
    10% PHP
    10% Python
    10% SQL
    10% Visual Basic
    5% C
    5% C++

    Established in 2022, Synatech Solutions is a software development company. The team specializes in Custom Software Development and Web Development and is in Madison, Wisconsin.

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  • Tektown Logotype

    Not yet reviewed

    $1,000+
    $100 - $149 / hr
    2 - 9
    Abbotsford, Australia

    Services provided

    15% Web Development
    15% Custom Software Development
    10% AI Development +6
    10% API Development
    10% Application Management & Support
    10% Cybersecurity
    10% E-Commerce Development
    10% IT Strategy Consulting
    10% Mobile App Development

    Focus Areas

    15% JavaScript
    10% AJAX
    10% C# +9
    10% PHP
    10% Python
    10% SQL
    10% Typescript
    5% ASP.NET
    5% C++
    5% HTML5
    5% Swift
    5% Visual Basic

    Tektown, a small software development firm, is headquartered in Abbotsford, Australia. Their services include Custom Software Development and Web Development.

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  • Webrex Solutions Logotype

    Webrex Solutions

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Custom Software Development
    20% Mobile App Development +3
    20% Web Design
    10% AI Development
    10% Search Engine Optimization

    Focus Areas

    10% JavaScript
    20% C#
    10% AJAX +6
    10% ASP.NET
    10% HTML5
    10% Other programming & scripting languages
    10% Redux
    10% SQL
    10% jquery

    Webrex Solutions is a small Lahore, Pakistan-based web design company. Their services include Web Design and Custom Software Development.

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  • Appsly Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% CRM Consulting and SI
    20% E-Commerce Development +2
    20% UX/UI Design
    20% Web Design

    Focus Areas

    10% JavaScript
    10% ASP
    10% ASP.NET +9
    10% Java
    10% Python
    10% SQL
    10% XML
    10% jquery
    5% AJAX
    5% HTML5
    5% Redux
    5% Swift

    Appsly, a web design company, offer Web Design and UX/UI Design. They were launched in 2024.

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  • SHELS Development Studio Logotype

    SHELS Development Studio

    Not yet reviewed

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

    Services provided

    20% Web Development
    30% Custom Software Development
    10% API Development +4
    10% Application Management & Support
    10% IoT Development
    10% Mobile App Development
    10% Other Application Development

    Focus Areas

    10% JavaScript
    30% Delphi
    30% Java +5
    10% SQL
    5% AJAX
    5% HTML5
    5% Python
    5% XML

    SHELS Development Studio is a software development company established in 2002. Their team provides Custom Software Development and Web Development.

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  • IKIM Tech Co. Logotype

    IKIM Tech Co.

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

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

    Focus Areas

    10% JavaScript
    25% PHP
    20% Python +3
    20% SQL
    15% HTML5
    10% Other programming & scripting languages

    User experience company IKIM Tech Co. Is based in Addis Ababa, Ethiopia. The team specializes in UX/UI Design and Graphic Design.

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  • AKIMS TECHNOLOGIES Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% ERP Consulting and SI
    20% Generative AI +2
    20% Mobile App Development
    20% Web Design

    Focus Areas

    10% JavaScript
    10% ASP.NET
    10% C# +7
    10% HTML5
    10% PHP
    10% Python
    10% Redux
    10% SQL
    10% UnrealScript
    10% Visual Basic

    AKIMS TECHNOLOGIES is a web design agency. The Karaikudi, India-based team specializes in Web Design and ERP consulting and SI.

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  • JLApp LLC Logotype

    JLApp LLC

    Not yet reviewed

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

    Services provided

    20% Web Development
    60% Mobile App Development
    20% Custom Software Development

    Focus Areas

    10% JavaScript
    25% Swift
    10% C# +9
    10% HTML5
    10% Kotlin
    10% Objective C
    5% Java
    5% Redux
    5% SQL
    5% Visual Basic
    3% XML
    2% Other programming & scripting languages

    JLApp LLC is an app development company. The team specializes in Mobile App Development and Custom Software Development.

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  • AFLAHZAMAN Logotype

    AFLAHZAMAN

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Branding
    20% IT Managed Services +2
    20% Search Engine Optimization
    20% Web Design

    Focus Areas

    10% JavaScript
    55% HTML5
    15% PHP +2
    10% SQL
    10% XML

    AFLAHZAMAN is a branding agency. The team provides Branding and Search Engine Optimization, and the agency is in Kerala, India.

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  • Calatayud Digital Solutions Logotype

    Calatayud Digital Solutions

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    20% Web Development
    20% Digital Strategy
    20% Search Engine Optimization +2
    20% UX/UI Design
    20% Web Design

    Focus Areas

    10% JavaScript
    10% AJAX
    10% Delphi +8
    10% HTML5
    10% Other programming & scripting languages
    10% PHP
    10% Python
    10% Typescript
    10% jquery
    5% Kotlin
    5% Swift

    Calatayud Digital Solutions is a Digital Strategy company. In Castelló de la Plana, Spain and Castelló de la Plana, Spain, the team provides Digital Strategy and Search Engine Optimization.

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  • Skiie LLP Logotype

    Skiie LLP

    Not yet reviewed

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

    Services provided

    10% Web Development
    10% Content Marketing
    10% Custom Software Development +7
    10% E-Commerce Development
    10% Email Marketing
    10% Mobile App Development
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    20% JavaScript
    20% PHP
    20% Python +3
    20% Typescript
    10% C
    10% Redux

    Founded in 2023, Skiie LLP, a small social media marketing agency, is headquartered in Ibadan, Nigeria. Their services include Social Media Marketing and Content Marketing.

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  • OFGA multimedia Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    2 - 9
    Chennai, India

    Services provided

    20% Web Development
    40% Mobile App Development
    20% AR/VR Development +1
    20% E-Commerce Development

    Focus Areas

    10% JavaScript
    15% C++
    10% C# +9
    10% Java
    10% PHP
    10% Python
    10% SQL
    5% C
    5% HTML5
    5% Typescript
    5% UnrealScript
    5% jquery

    OFGA multimedia, an application development company, was established in 2022. The agency specializes in Mobile App Development and Web Development, and is small.

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  • WordPress Wallah Ltd Logotype

    WordPress Wallah Ltd

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Mobile App Development
    20% Web Design +4
    10% E-Commerce Development
    10% Logo
    10% Product Design
    10% UX/UI Design

    Focus Areas

    10% JavaScript
    40% PHP
    10% AJAX +4
    10% HTML5
    10% Other programming & scripting languages
    10% SQL
    10% jquery

    WordPress Wallah Ltd, a web design agency, is based in London, England. Founded in 2024, the team offers Web Design and Web Development.

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  • Qodera Software Solutions Logotype

    Qodera Software Solutions

    Not yet reviewed

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

    Services provided

    10% Web Development
    20% UX/UI Design
    10% Custom Software Development +6
    10% E-Commerce Development
    10% IoT Development
    10% Mobile App Development
    10% Other Application Development
    10% Wearable App Development
    10% Web Design

    Focus Areas

    20% JavaScript
    20% Python
    15% Kotlin +4
    15% SQL
    15% Typescript
    10% Swift
    5% Java

    Established in 2023, Qodera Software Solutions is an user experience design agency. Headquartered in Cairo, Egypt, the team focuses on UX/UI Design and Web Design.

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  • MilGenX Tech Logotype

    MilGenX Tech

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    20% Web Development
    10% Advertising
    10% Branding +7
    10% Direct Marketing
    10% E-Commerce Development
    10% Mobile App Development
    10% UX/UI Design
    10% Web Design
    5% API Development
    5% Business Consulting

    Focus Areas

    10% JavaScript
    15% SQL
    15% Swift +10
    10% Other programming & scripting languages
    10% PHP
    5% AJAX
    5% Ember.js
    5% HTML5
    5% Kotlin
    5% Objective C
    5% Redux
    5% Typescript
    5% jquery

    Website development firm MilGenX Tech was launched in 2018. The company specializes in Web Development and Advertising.

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  • Maxxeom Digital Solutions Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Branding
    20% Digital Strategy +2
    20% Graphic Design
    20% Web Design

    Focus Areas

    10% JavaScript
    35% HTML5
    20% PHP +4
    15% jquery
    10% SQL
    5% AJAX
    5% XML

    Maxxeom Digital Solutions is a branding agency. Founded in 2021, the team specializes in Branding and Digital Strategy.

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  • Bismi Information Technology Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    2 - 9
    Dubai, United Arab Emirates

    Services provided

    20% Web Development
    35% CRM Consulting and SI
    20% Funding & Investment +2
    15% Blockchain
    10% Digital Asset Management

    Focus Areas

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

    Bismi Information Technology is a CRM consulting and SI company. The Dubai, United Arab Emirates-based firm offers CRM consulting and SI and Web Development.

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  • DIGITVILLA LLP Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Ranchi, India

    Services provided

    20% Web Development
    20% API Development
    20% Branding +2
    20% Custom Software Development
    20% Web Design

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP.NET +7
    10% C#
    10% HTML5
    10% Java
    10% PHP
    10% Python
    10% SQL
    10% jquery

    DIGITVILLA LLP is a Ranchi, India-based branding agency. Their services include Branding and Web Design.

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  • Straton Ally Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% Content Marketing
    20% Custom Software Development +2
    20% Mobile App Development
    20% Search Engine Optimization

    Focus Areas

    10% JavaScript
    15% Kotlin
    15% PHP +4
    15% Python
    15% Ruby
    15% SQL
    15% Swift

    Content Marketing company Straton Ally was founded in 2024. The team focuses on Content Marketing and Search Engine Optimization.

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  • Cinetavisual Studio Logotype

    Cinetavisual Studio

    Not yet reviewed

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

    Services provided

    20% Web Development
    25% Advertising
    20% Digital Strategy +3
    15% Media Planning & Buying
    10% Branding
    10% Marketing Strategy

    Focus Areas

    10% JavaScript
    35% Python
    30% Visual Basic +1
    25% Kotlin

    Cinetavisual Studio is an Advertising company founded in 2015. Their team specializes in Advertising and Digital Strategy.

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  • IOTiva Innovation LLP Logotype

    Not yet reviewed

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

    Services provided

    10% Web Development
    60% Custom Software Development
    10% Application Management & Support +2
    10% E-Commerce Development
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    45% Python
    15% SQL +2
    10% HTML5
    10% Redux

    IOTiva Innovation LLP is a software development company. Their small team of employees is in Surat, India. Their team specializes in Custom Software Development and Web Development.

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  • Black Media Logotype

    Black Media

    Not yet reviewed

    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    20% Web Development
    20% Custom Software Development
    20% E-Commerce Development +2
    20% IT Staff Augmentation
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP.NET +7
    10% C#
    10% Java
    10% Kotlin
    10% SQL
    10% Swift
    10% Typescript
    10% jquery

    Black Media is a Morelia, Mexico-based IT staff augmentation company. Established in 2020, the team provides IT staff augmentation and Custom Software Development.

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  • Avishkruti Solutions Logotype

    Avishkruti Solutions

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% CRM Consulting and SI
    20% Custom Software Development +2
    20% IT Managed Services
    20% UX/UI Design

    Focus Areas

    10% JavaScript
    50% Python
    20% Kotlin +1
    20% Swift

    Avishkruti Solutions is an UX design company headquartered in Ahmedabad, India. Established in 2024, the team specializes in UX/UI Design and CRM consulting and SI.

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  • GoogolUp Studio Logotype

    Not yet reviewed

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

    Services provided

    20% Web Development
    20% E-Commerce Development
    20% Ecommerce Marketing +2
    20% Search Engine Optimization
    20% UX/UI Design

    Focus Areas

    10% JavaScript
    65% PHP
    25% Python

    GoogolUp Studio is a SEO services firm. They are based in SAN FRANCISCO, California and Benin City, Nigeria. Their team focuses on Search Engine Optimization and UX/UI Design.

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

List of the Top 15 JavaScript Development Companies

  1. xfive Logotype

    xfive

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

    Ability to deliver

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

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  2. ImageX Logotype

    ImageX

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

    Ability to deliver

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

    Service focus

    90% Web Development
    50% JavaScript
    10% Other
    View Profile Visit Website
  3. Brainhub Logotype

    Brainhub

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

    Ability to deliver

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

    Service focus

    45% Web Development
    75% JavaScript
    55% Other
    View Profile Visit Website
  4. ATEAM SOFT SOLUTIONS Logotype

    ATEAM SOFT SOLUTIONS

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

    Ability to deliver

    38.5/40.0
    19.2/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

    50% Web Development
    50% JavaScript
    50% Other
    View Profile Visit Website
  5. The Software House Logotype

    The Software House

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

    Ability to deliver

    39.8/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    40% Web Development
    60% JavaScript
    60% Other
    View Profile Visit Website
  6. Xmartlabs Logotype

    Xmartlabs

    $10,000+
    $50 - $99 / hr
    50 - 249
    Montevideo, Uruguay

    Ability to deliver

    39.5/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    50% Web Development
    35% JavaScript
    50% Other
    View Profile Visit Website
  7. Airdev Logotype

    Airdev

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

    Ability to deliver

    38.7/40.0
    19.4/20 Reviews
    9.6/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  8. WPWeb Infotech Logotype

    WPWeb Infotech

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

    Ability to deliver

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

    Service focus

    65% Web Development
    20% JavaScript
    35% Other
    View Profile Visit Website
  9. Lizard Global Logotype

    Lizard Global

    $10,000+
    $50 - $99 / hr
    50 - 249
    Kuala Lumpur, Malaysia

    Ability to deliver

    39.3/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

    30% Web Development
    70% JavaScript
    70% Other
    View Profile Visit Website
  10. Softonix Logotype

    Softonix

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

    Ability to deliver

    36.5/40.0
    17.6/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  11. INOXOFT Logotype

    INOXOFT

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

    Ability to deliver

    39.8/40.0
    19.8/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  12. PopArt Studio Logotype

    PopArt Studio

    $5,000+
    $50 - $99 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

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

    Service focus

    35% Web Development
    40% JavaScript
    65% Other
    View Profile Visit Website
  13. GeekyAnts Logotype

    GeekyAnts

    $10,000+
    $25 - $49 / hr
    250 - 999
    San Francisco, CA

    Ability to deliver

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

    Service focus

    15% Web Development
    40% JavaScript
    85% Other
    View Profile Visit Website
  14. Incora Logotype

    Incora

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

    Ability to deliver

    37.6/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  15. SpdLoad Logotype

    SpdLoad

    $50,000+
    $25 - $49 / hr
    50 - 249
    Kharkiv, Ukraine

    Ability to deliver

    36.8/40.0
    17/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    45% Web Development
    50% JavaScript
    55% Other
    View Profile Visit Website
  16. Brainium Information Technologies Logotype

    Brainium Information Technologies

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

    Ability to deliver

    36.7/40.0
    19.4/20 Reviews
    9/10 Clients & Experience
    8.4/10 Market Presence

    Service focus

    35% Web Development
    30% JavaScript
    65% Other
    View Profile Visit Website
  17. Toptal Logotype

    Toptal

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

    Ability to deliver

    38.7/40.0
    18.8/20 Reviews
    9.9/10 Clients & Experience
    10/10 Market Presence

    Service focus

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

    HTMLPanda

    $1,000+
    < $25 / hr
    250 - 999
    Walpole, MA

    Ability to deliver

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

    Service focus

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

    Techuz InfoWeb Pvt. Ltd.

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

    Ability to deliver

    36.3/40.0
    16.6/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  21. PowerGate Software Logotype

    PowerGate Software

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

    Ability to deliver

    38.7/40.0
    19.2/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    30% Web Development
    21% JavaScript
    70% Other
    View Profile Visit Website
  22. Experion Technologies Logotype

    Experion Technologies

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

    Ability to deliver

    36.9/40.0
    17.2/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% Other
    View Profile Visit Website
  23. Arcanys Logotype

    Arcanys

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

    Ability to deliver

    38.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    8.7/10 Market Presence

    Service focus

    30% Web Development
    20% JavaScript
    70% Other
    View Profile Visit Website
  24. Cleveroad Logotype

    Cleveroad

    $10,000+
    $25 - $49 / hr
    250 - 999
    New York, NY

    Ability to deliver

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

    Service focus

    28% Web Development
    15% JavaScript
    72% Other
    View Profile Visit Website
  25. Human Made Logotype

    Human Made

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

    Ability to deliver

    37.8/40.0
    18/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    100% Web Development
    30% JavaScript
    View Profile Visit Website
  26. Blazity Logotype

    Blazity

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

    Ability to deliver

    37.3/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9.2/10 Market Presence

    Service focus

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

    Oshyn

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

    Ability to deliver

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

    Service focus

    100% Web Development
    40% JavaScript
    View Profile Visit Website
  28. Sigma Software Group Logotype

    Sigma Software Group

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

    Ability to deliver

    38/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

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

    Vangwe

    $10,000+
    $50 - $99 / hr
    10 - 49
    Montevideo, Uruguay

    Ability to deliver

    38.3/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  30. Vincit Logotype

    Vincit

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

    Ability to deliver

    36.2/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    30% Web Development
    30% JavaScript
    70% Other
    View Profile Visit Website

Top JavaScript Development Agencies

A JavaScript development company designs, builds, and maintains software products that rely on JavaScript across the stack. Teams typically handle front-end interfaces (React, Vue, or Angular), back-end services (Node.js, Express, NestJS), and database integrations. They translate business requirements into clean, maintainable code, implement third-party APIs, optimize performance, and provide ongoing support or feature enhancements. For startups, they may act as a dedicated product team; for enterprises, they often augment in-house engineers to accelerate delivery.

Most agencies bundle multiple offerings so clients can access full product life-cycle support:

  • Discovery workshops & technical consulting
  • UI/UX design and prototyping
  • Front-end SPA or PWA development
  • Server-side development with Node.js or Deno
  • API design, GraphQL, and microservices architecture
  • QA automation & performance testing
  • DevOps, CI/CD, and cloud deployment (AWS, Azure, GCP)
  • Post-launch maintenance and feature sprints

Some firms specialize in niches such as ecommerce storefronts, real-time dashboards, or IoT applications built with JavaScript frameworks like Next.js or Svelte.

Clutch data shows project budgets range widely:

  • MVP or small web app - $15,000–$50,000
  • Mid-size product build - $50,000–$200,000
  • Enterprise-grade platform - $200,000–$1M+ | Hourly rates usually fall between $50–$149 depending on agency location, seniority, and specialization. Expect higher rates for U.S.-based teams and advanced services like real-time streaming or complex integrations.

  • Align expertise: Verify experience with your required stack (e.g., React Native, TypeScript, serverless).
  • Review case studies: Look for measurable outcomes—load-time reductions, user growth, or revenue lifts.
  • Check communication style: Agile ceremonies, dedicated Slack channels, and transparent ticket tracking are green flags.
  • Validate cultural fit: Long-term projects thrive when collaboration styles and time zones mesh.
  • Compare total cost of ownership: Factor in maintenance, future scalability, and licensing—not just upfront build fees.

Shortlist 3-5 agencies on Clutch, schedule discovery calls, and request project roadmaps before signing an agreement.

  • Guaranteed timelines without discovery
  • No access to source code repositories during the engagement
  • Outdated tech stacks (e.g., jQuery-only solutions for modern SPAs)
  • Low developer retention or high turnover
  • Vague pricing models or hidden fees

If an agency dismisses code reviews, ignores testing, or refuses to provide client references, proceed with caution

  • Which JavaScript frameworks do you specialize in, and why?
  • Can you walk me through a recent project with similar complexity?
  • How do you ensure code quality—linting, peer reviews, automated tests?
  • What is your approach to scalability and performance optimization?
  • How will we communicate and track progress (tools, meeting cadence)?
  • Who owns the intellectual property and source code upon project completion?

Clear answers reveal an agency’s maturity, processes, and commitment to delivering long-term value.

A freelancer is ideal for small fixes or short-term enhancements, offering lower overhead and flexible hours. Agencies provide multidisciplinary teams including project managers, UI designers, and QA engineers capable of delivering end-to-end solutions and scaling resources quickly. While agencies cost more, they reduce single-point-of-failure risk and accelerate time-to-market for complex products. How do JavaScript firms measure ROI? Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.

Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.

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