Looking for a top JavaScript development company?

Developers use JavaScript to make web pages responsive and interactive. JavaScript is a text-based programming language used in web development, typically alongside CSS and HTML. Some common use cases for JavaScript are menus, animations, or interactive maps.

That's why we've created this list of the best JavaScript developers for you to review. Read through company descriptions, former clients, and notable projects to find the best fit for your business. (And, if you want personalized recommendations, tell us about your project.)

List of the Best JavaScript Development Companies

  • 61
    $25,000+
    50 - 249 Employees
    Washington DC

    Interactive Strategies is a full service digital agency located in Washington, D.C. Founded in 2001, Interactive Strategies has grown to a 50-person, Webby-nominated firm that provides web design, web development, and email marketing services. Over the years, they have partnered with some of the largest associations, nonprofit and B2B organizations in the country, including the American Red Cross, NAACP, and ACOG to achieve their digital goals.

    Clients
    Ford
    DuPont
    Accenture
    Bacardi
    Industries
    Notable Project

    Working with a large government administration agency, Interactive Strategies was tasked with orchestrating a marketing strategy review, working on multiple websites, and leading all of the agency's marketing campaigns. As a result of Interactive Strategies' diligence and project management skills, the client completely shifted the way it marketed itself.

    "From our perspective, Interactive Strategies has gone way above and beyond the call of duty to support our needs." – Senior VP, Government Administration Agency

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  • 62
    $75,000+
    50 - 249 Employees
    Amesbury MA

    Imarc is a full-service digital agency founded in 1997 and headquartered in Amesbury, Mass. Their team of around 40 employees includes engineers, designers, and marketing experts. They specialize in web design, web development, and custom software development.

    Clients
    JetBlue
    Texas Instruments
    Everbridge
    Notable Project

    Imarc did a custom redesign of a site for a healthcare nonprofit. They worked with the client to develop a model for the site and built it using CraftCMS to meet the client’s security requirements. The clients were pleased with the new site. 

    “The changes were instantaneous and received positive feedback from clients, sponsors, and our hospital colleagues. The site is professional and makes our branding more cohesive.” – Biz. Dev. and Com. Manager, Healthcare Nonprofit

  • 63
    $50,000+
    50 - 249 Employees
    Kyiv Ukraine

    Software provider Django Stars is based in Kiev, Ukraine. Founded in 2008, the agency and their team of 60 specializes in web and custom software development for primarily midmarket clients. 

    Clients
    Unleash12
    Kaspersky Labs
    moneypark
    Sindeo
    Industries
    Notable Project

    An investment services platform hired Django Stars to develop a web platform. The agency used Django Python to develop the backend on a CRM system. The project was completed successfully with near-perfect code and has received positive feedback.

    "They're serious and they do good work."–Managing Partner, Investment Services Platform

  • 64
    $50,000+
    50 - 249 Employees
    Odessa Ukraine

    SteelKiwi is a 50+ web and mobile development company based in Ukraine with offices in California, Slovakia, and Israel. Started in 2011, the team creates robust digital solutions with rapid turnaround, regardless of the project’s complexity or scale.

    Clients
    JobMatch
    Khabar
    Nova Vita
    Possio
    Industries
    Notable Project

    SteelKiwi provided the client with a range of services, including logo design, illustration, App Store optimization, and iOS/Android development. The client esteemed the team’s reliable project management and organized communication throughout a very satisfactory partnership.

    “The way their developers work together with UX designers is very efficient. ... It was perfect. It happened so quickly.” – Founder, Social Media Platform

  • 65
    $100,000+
    50 - 249 Employees
    Edinburgh United Kingdom

    xDesign is a design and development company in Edinburgh, U.K. Founded in 2010, their team of 50+ provides web development and mobile app development services to small business, midmarket, and enterprise clients across various industries. 

    Clients
    PayPal
    Heineken
    World Health Organization
    William Grant & Sons
    Industries
    Notable Project

    xDesign developed to help a modular building manufacturer better monitor its product delivery. The client mapped out its goals, from which they designed wireframes, prototyped, and ultimately delivered the app. The client was impressed with their ability to understand the project goals and provide input to improve the product. 

    "They picked up our business process very very quickly and they were very good at pointing out things they thought might be better." – IT & Digital Manager, Modular Building Manufacturer

  • 66
    $10,000+
    250 - 999 Employees
    Poznań Poland

    Based in Poland, STX Next is a global software development company. The agency was founded in 2005 and carries a team of over 170 full-stack Python developers alone. In total, the company has over 300 professionals that specialize in web development, software development, and application testing. 

    Clients
    Verve
    Wunderman
    Coras
    Realface
    Industries
    Notable Project

    STX Next developed an online platform and web application from scratch for a government-run financial services firm. The firm outsourced the entire back-end development project to STX Next. The client was pleased with the quality of work, despite its difficulty, and how quickly everything was done. Their partnership is ongoing. 

    "They always have brilliant ideas about how to improve the user experience, how to find exceptional cases. That part made my job and my decision to work with them again a lot easier." – Head of Product & Technology, Financial Services Firm

  • 67
    Undisclosed
    50 - 249 Employees
    New York NY

    Alley Interactive is a web development firm based in New York City with an additional office in Burlington, Vt. Founded in 2010, the team of 73 specializes in web development, web design and UX/UI design. They work primarily with midmarket clients in the media industry.

    Clients
    New York Post
    Brookings
    Georgetown University Health Policy Institute
    The Nature Conservancy
    Industries
    Notable Project

    Alley Interactive worked on WordPress implementation for a nonprofit research agency. They consolidated content from several websites and databases onto a single WordPress site and CMS. The project included back-end development, data migration, and ongoing support. The client appreciated their direct communication throughout the project.

    “If we have a question or see a bug, you're talking directly to the person that knows how to fix it. They're not so caught up in the code that they can't communicate effectively with clients.” – Associate Director, Nonprofit Research Agency

  • 68
    $50,000+
    10 - 49 Employees
    New York NY

    500Tech is a leading front-end consultancy headquartered in Ramat Gan, Israel with an additional branch in New York. Founded in 2012, the agency currently consists of over 20 employees who specialize in web development and mobile app development.

    Clients
    Unpakt
    MarketOnce
    ThetaRay
    Phytech
    Notable Project

    A valve manufacturer approached 500Tech to develop a web app using Ruby on Rails. Using a previous app as a guide, the team redesigned the platform from the ground up, translating outdated algorithms into a current solution. The final build has become essential to internal operations, and customers worldwide continue to use it.

    "The UI is great and the outcome and everything works to our satisfaction. We have users signing in and using it from all over the world." – Application Engineer, Valve Manufacturer 

  • 69
    $25,000+
    50 - 249 Employees
    London United Kingdom

    JustCoded is a web development company based in London with a satellite office in Kharkiv, Ukraine. Founded in 2007, it employs around 60 professionals who specialize in web development, e-commerce development, and mobile app development services to clients in primarily in the financial services industry.

    Clients
    Expedia
    FxPro
    ADS Securities
    Robb Report
    Industries
    Notable Project

    JustCoded worked with a community of creative agencies to provide tech and development services including custom-built projects, loan application processes, and API integrations. The main project JustCoded worked on was developing a community platform for a company using WordPress. This project included designing filters for over 1,000 pages of content and developing a strong search functionality for the site. The initiative ended up drawing over 1,000 customers within 6 months, well past the original goal of 100 clients in in 3 months.

    "When I started working with them, everything began running smoothly. We did a little test project, and I thought it was brilliant. The cost-to-value ratio was great as well. I can think of 25 companies I’ve worked with in different countries, but none delivered like JustCoded did. I’m still getting the same feedback from people I’ve introduced them to, which is great." – Managing Director, Community of Creative Agencies

  • 70
    $25,000+
    50 - 249 Employees
    Warszawa Poland

    Artegence is a Warsaw, Poland based development company that has been in operation since 1995. Their team of 51 specializes in web development, custom software development, and UX/UI design. They primarily work with enterprise level and mid-market clientele.

    Clients
    ETX Capital
    Wyborcza.pl
    Wysokie Obcasy
    PKO Bank Polski
    Notable Project

    A universal bank hired Artegence to develop their online banking platform. Artegence was responsible for the development, technical analysis, and UX/UI design. The finished product helped the client expand their business online. 

    "Currently, all of our clients use the platform. They appreciate its simplicity and functionality." - Head of Digital Channels, Universal Bank

  • 71
    $10,000+
    10 - 49 Employees
    Montevideo Uruguay

    Launched in 2018, CreateThrive is a mobile app development company. Their small team is located in Montevideo, Uruguay. Their team specializes in mobile app development, web development, custom software development, and ux/ui design.

    Industries
    Notable Project

    CreateThrive developed a consulting firm's MVP. It is a document system that will be used in its demos to law enforcement agencies. Management interface and user interface as well as backend were key goals.

    "They really are experts in their field, but they treated us as equals throughout the entire process."

  • 72
    $10,000+
    50 - 249 Employees
    Colorado Springs CO

    SmartexLab is a custom software developer. Founded in 2014, they provide web and mobile app development services to midmarket and small businesses. Their team of 30 splits their focus between the financial services and healthcare industries. 

    Clients
    Thing-it
    Leogistics
    Partsbase
    PapayaGlobal
    Industries
    Notable Project

    SmartexLab developed a custom CRM to streamline fund management processes. They integrated dashboards and a call center, among other features. The tool led to a 30% increase in leads and saves the client significant time. 

    "They're not just another coding agency." – CTO, Funding Company

  • 73
    $50,000+
    10 - 49 Employees
    Los Angeles CA

    Urban Insight is a digital design agency with a team of 25 professionals that provides web development, web design, and digital strategy services. Founded in 2000 and located in Los Angeles, the agency has completed over 500 successful projects for its clients.
     

    Clients
    University of Southern California
    Legal Services Corporations
    Japanese American National Museum
    Los Angeles County Museum of Art
    Industries
    Notable Project

    An urban planning company hired Urban Insight to create a new website. Urban Insight redesigned the text-driven content on their site to include more images and video content. The planning firm has received positive feedback since the site's launch and Urban Insight continues to provide support when needed. 

    "Their dependability is rock-solid. We were confident in their ability to execute our vision and that the end result would be successful when we launched." – Principal, Urban Design Studio

  • 74
    $50,000+
    1,000 - 9,999 Employees
    Kyiv Ukraine

    Sigma Software is a software development partner with 1300+ employees. Founded in 2002, the company is headquartered in Ukraine and has offices in the U.S., Canada, the U.K., Israel, Sweden, and Poland. They help clients from startups to Fortune 500 brands with software product and custom solutions development. Their expertise spans across web and app development, digital transformation, Big Data, AI/ML, AR/VR, and IoT.

    Clients
    Volvo
    Scandinavian Airlines
    Verizon Media
    Fortum
    Industries
    Notable Project

    Sigma Software developed and launched an advertising platform for an advertising technology firm. The firm had a general idea for the platform, but needed the technical skills to launch it. Sigma Software provided interface design and coding, using a team of 8-12 developers. The launched ad platform began successfully generating revenue within 6 months and received positive feedback.

    "We consider Sigma Software to be a strategic partner and an integral part of what we're doing at this time." – Founder & CEO, Ad Tech Firm

  • 75
    $10,000+
    50 - 249 Employees
    Vinnytsia Ukraine

    Existek is a full-cycle software development and outsourcing firm based in Vinnitsa, Ukraine. They were established in 2012, and have 13 employees. Existek's services include web development, custom software development, IT staff augmentation, and more.

    Clients
    Lingit AS
    Summit Healthcare Services
    Justmakeitwork
    Industries
    Notable Project

    Existek provided custom mobile integrations for ERP and CRM suites for a pharmaceutical company in the Norwegian market. The client wanted to make their database available to field agents, and needed to maximize the range of functionality. Existek performed extensive business research on the pharmaceutical industry, then delivered native iOS and Android applications based on the same database as their proprietary CRM system. The client was particularly impressed with their attention to detail.

    "Existek is one of the rare providers that can transform a pure idea that started on a napkin into a customized software that meets all needs. Their technical and business expertise allowed them to come up with suggestions that added significant value to the final results." — Chief Digital Strategist, Consultant to Pharmaceutical Firm

  • 76
    $25,000+
    50 - 249 Employees
    Clearwater FL

    KitRUM is a software engineering company that was founded in 2014. The company is headquartered in Clearwater, Fla., with secondary locations in Krakow, Poland and Kharkov, Ukraine. They are made up of 49 employees. They specialize in AR/VR development, IoT development, and mobile app development. 

    Clients
    Vivuso
    Fischer Wolle
    Promethean
    Industries
    Notable Project

    KitRUM helped a video production company design an iOS app and bring it to the App Store. They ensured the app ran smoothly and fixed any bugs before launch. The client praised their project management and communication.

    "We had weekly check-ins, and they showed a demo every week of the work they’d accomplished. They provided progress reports to keep us updated on where they were at." – CTO, Video Production Company

  • 77
    $25,000+
    50 - 249 Employees
    Lakewood CO

    Akveo is an IT consulting and product development firm founded in 2015. Based in Minsk, Belarus, the team of 47 specializes in web, mobile app, and IoT development. They work mostly with midmarket businesses, though they also offer their services to small businesses and enterprises.

    Clients
    Evalanche, Conda AG, Mitel Networks Corp
    Industries
    Notable Project

    A software development company worked with Akveo to develop a mobile application for both Android and iOS for usage in utility companies. The application received positive responses from rounds of user acceptance tests.

    “Akveo is very professional. They allocated senior level resources to our project, which is what we needed. Since we work within short timelines without a huge budget, we have limited time to scale up the team in size.” – CTO, Software Development Company

  • 78
    $5,000+
    10 - 49 Employees
    Zagreb Croatia

    Human is a web design agency headquartered in Zagreb, Croatia with an office in Osijek, Croatia. They are run by a team of fewer than 50 professionals and were founded in 2001. Services include web development, digital strategy, and web design for small and midmarket businesses. They have experience with Symfony, WordPress, and VueJS, among other platforms.

    Clients
    Vipnet
    Gencove
    Lino
    Industries
    Notable Project

    A marketing agency approached Human for their development and consultation services for their Android mobile app, handling both front and back-end development. The app had one of the most successful launches in Croatia in 2019.

    "I found their drive and human approach to be the two things that set them apart from the competition." - Digital Director, Marketing Agency

  • 79
    $1,000+
    50 - 249 Employees
    Varna Bulgaria

    htmlBurger is an agency-to-agency coding service company based in Varna, Bulgaria. The company, founded in 2005, has more than 50 employees and provides web development, e-commerce development, and web design services to small and larger-sized companies in the e-commerce, advertising & marketing, and IT industries.

    Clients
    Blooom
    Soulful Apartments
    Caldo
    Lucina
    Industries
    Notable Project

    A software company hired htmlBurger to convert an application design and mockup created by another firm into a pixel-perfect, web-based UI representation. htmlBurger was also tasked to do some some scaffolding of the React components as well as some light coding on some elements of the app. htmlBurger completed the project and met all expectations with their services. 

    "I was very impressed with the attention to detail of the visual representation, all the interactive pieces we discussed were included, and there were some added visual rendering capabilities included with the charting component while retaining the original design." - Owner & Primary Architect and Full-Stack Developer, Software Company

  • 80
    $10,000+
    50 - 249 Employees
    Minsk Belarus

    Codex Software is a web and mobile development agency with offices in Minsk, Belarus, and Cheltenham, England. Founded in 2011, they comprise 59 employees specializing in designing and developing software, creating web and mobile solutions, e-commerce, enterprise software, Big Data, and cloud solutions. They work primarily with printing and publishing companies, IT startups, and established businesses.

    Clients
    Macmillan Publishers
    Vector Media
    Precision Printing
    Industries
    Notable Project

    Codex Software designed a Java-based RESTful API for a web platform for an IT and services company. They added innovative features to the platform, including support for user-submitted HTTP calls and data review. They successfully delivered a RESTful API that has integrated with the web platform.

    “I was impressed by the sheer amount of homework they did in the beginning. They were prepared to do a lot of research and learning before taking on the project. That’s still very unique. A lot of other organizations don’t step out of their comfort zone. Codex Software wasn’t afraid of that.” – Director, IT & Services Company

  • 81
    $25,000+
    250 - 999 Employees
    Lexington MA

    SimbirSoft is a 250+ web, mobile, and custom software development firm based in Lexington, MA, with an office in Ulyanovsk, Russia. Founded in 2001, their full-service team delivers the full suite of digital tools needed for business growth.

    Clients
    Ferrero
    Kimberly-Clark
    lamoda
    Matsushita Corp
    Industries
    Notable Project

    Over a five-year span, SimbirSoft developed numerous web and mobile apps for brands in the client’s portfolio. The end-product enjoyed positive reviews and helped the client meet revenue goals, while the team’s service-oriented attitude and flexibility were also appreciated.

    “It is always pleasant to deal with the SimbirSoft team. A devoted manager who is always in touch with us also creates this sense of comfort. Their speed of delivery and the quality of their work is excellent.” – Project Manager, Russian Publishing Company

  • 82
    $100,000+
    50 - 249 Employees
    San Francisco CA

    Kanopi Studios is a strategy, design, and development agency based in San Francisco. Founded in 2010, the team of 33 specializes in web development, web design, and UX/UI design. They focus on business services, non-profits, and consumer products and services.

     

    Clients
    Yale Press
    University of California
    Autodesk
    San Francisco International Airport
    Industries
    Notable Project

    Kanopi Studios migrated an obsolete CMS to an updated version of Drupal for a professional grad school. They retained the platform’s content, rebuilt custom modules, and developed a new backend. They also redesigned the site’s UX/UI. The client was impressed with the expertise they brought to the project. 

    “Their expert knowledge of Drupal facilitated a quick and effective migration. They also helped modernize our software development process.” – Sr. Director of IT, Professional Graduate School

  • 83
    $100,000+
    50 - 249 Employees
    Atlanta GA

    Arke is an Atlanta-based web development firm. Arke was founded in 2005 and has grown to a team of more than 150 employees. The firm mainly works with enterprise clients in the financial services, consumer products and services, healthcare and medical, manufacturing, and utilities industries.

    Clients
    International Monetary Fund
    Mizuno
    Herschend Family Entertainment
    Georgia-Pacific
    Industries
    Notable Project

    A global distribution company was unsatisfied with its previous developer and hired Arke to handle its web development projects. Arke uses the Sitecore CMS and handles all of the company's maintenance and development. 

    "They’re very responsive to any of our needs. They handle our online support all day, every day ... We’ve received a tremendous amount of positive feedback." - Senior Marketing Manager, Global Distribution Company

  • 84
    $1,000+
    50 - 249 Employees
    Minsk Belarus

    Founded in 2007, AIS Novations is a Minsk, Belarus-based development company that specializes in web development and Blockchain for clients in financial services, e-commerce and information technology fields. A team of about 50, AIS Novations provides a full cycle of software development and IT consulting.

    Clients
    Cambridge University
    Kwick Doctor
    Loomia
    AlSales
    Industries
    Notable Project

    AIS Novations helped a software development firm convert prospects into customers, improve client satisfaction, and increase online visibility by overseeing the development of an updated online ordering system and web application that was written in .NET and C#. As a result of its partnership with AIS Novations, the software development firm's client retention rate is 97%. 

    "At this point, it's like we're one company even though we're not because I use [AIS Novations] exclusively." - Owner, Development Group 

  • 85
    $5,000+
    50 - 249 Employees
    Wrocław Poland

    Based in Wroclaw, Poland, Synergy Codes provides web development, custom software development, and UX/UI design services. Its team of 34 focuses on the IT industry, but also provides services in the healthcare/medical and automotive industries. 


     

    Clients
    Opal-RT Technologies
    SL Corporation
    omicX
    Enagic
    Industries
    Notable Project

    Synergy Codes began working with a testing simulation firm to provide web application development services. It specifically worked with Vue.js technology to create a new interface for one of the firm's projects. The customer appreciated Synergy Codes’ ability to adapt to all types of projects.

    "Synergy Codes easily caught on to everything we were doing and they were able to give us suggestions for improvement. They added value to our work. They’re smart enough to go further than just doing their job." – Product Manager, Testing Simulation Firm

     

  • 86
    $10,000+
    50 - 249 Employees
    Montevideo Uruguay

    Xmartlabs is a software product development firm based in Montevideo, Uruguay with a US office in San Francisco. Established in 2012, the company employs about 30 employees that focus on developing operations management and business applications. Their services include mobile development for Android and iOS, web app development, and UI/UX design.

    Clients
    Nobly
    Cipherhealth
    Chefsfeed
    Industries
    Notable Project

    Xmartlabs developed a native iOS application for a US real estate management startup. The client sought to provide a consistent, high-quality solution for digital property communication and came to Xmartlabs with a rudimentary prototype. The Xmartlabs team built out the application's features, including financial security elements, and was able to successfully launch a viable product within the client's timeline.

    "If something was outside the scope of the product, like a build tool that would help us speed up our development or a test we needed to integrate, they seemed to be very on top of the best practices, and they worked well with our existing engineering team on integrating those things." – CEO, Housing Application

  • 87
    $5,000+
    50 - 249 Employees
    Warszawa Poland

    FireArt Studio is a design, development, and production studio founded in 2006. The company is located in Warsaw, Poland where its team of 44 provides a wide array of services including web development, web design, mobile app development, video production, UI/UX design, graphic design services to primarily small businesses.

    Clients
    Google
    PracticeLink
    MyTaxi
    Industries
    Notable Project

    A healthcare professional development startup hired FireArt Studio to create an online tool for healthcare professionals. FireArt Studio designed and coded the front end using Javascript and created custom illustrations for the UI.

    "They came up with an attractive design with minimal direction and inspiration from our team. They were also quite helpful, pointing out some usability issues that we were able to fix before our users encountered them." — CTO, Healthcare Startup

  • 88
    $50,000+
    10 - 49 Employees
    Chicago IL

    Headquartered in Chicago and made up of strategists, designers, and developers, Chromatic is a fully distributed team that supports clients with web challenges. 

    Clients
    Maui Jim
    Imprivata
    American Hospital Association
    Harvard University
    Industries
    Notable Project

    Chromatic rebuilt websites using Drupal for a magazine publishing company. At the clients request, they focused on improving the UX and adding useful custom features. Adhering to  SEO best practice expanded the site's online visibility. Chromatic offered a perfect balance of technical ability and thoughtful accommodation.

    "One of our properties saw a 50% increase in organic traffic from Google and other search engines after being moved to the new platform."–Director of Product Management, Magazine Publishing Company

  • 89
    $5,000+
    50 - 249 Employees
    Reno NV

    Noble Studios is a full-service digital agency based in Reno, Nev. Founded in 2003, their team of about 50 employees provides services to small, mid-market, and enterprise businesses. They specialize in web design, web development, SEO, PPC, and digital strategy services.

    Clients
    AirAsia
    Santa Monica Tourism & Travel
    Century 21
    University of California
    Industries
    Notable Project

    Noble Studios built and redesigned a nonprofit's website and mobile development. More recently, they handle SEO, SEM, digital media buys, and other strategic marketing resources. Thanks to their efforts, one of the client's studies garnered 10,000 participant signups within 48 hours.

    "Noble [...] treats you like your needs are unique, and I feel like their solutions are tailored to our market and our region." – Director of Communications & New Media, Nonprofit

  • 90
    $10,000+
    50 - 249 Employees
    Providence RI

    Strategy, design, and development shop Lullabot is headquartered in Providence, RI. With more than 50 employees, Lullabot provides Drupal web development, web design, software development, and digital strategy to mid-market and enterprise clients.

    Clients
    MSNBC
    Turner Broadcasting
    BBC
    The Washington Post
    Industries
    Notable Project

    Lullabot redesigned a Fortune 500 media company's Drupal website. The goal was to better align the site with the client's brand image. The client was impressed with the Lullabot team's communication: They kept the entire company informed about the project's progress.

    "As we began to board new members, Lullabot worked hand-in-hand with them to get them up to speed with the build. During post-launch, they stayed on for several months as we continued adding support staff." – VP of Technology Strategy, Media Company 

Tell us about your project
NEED HELP SELECTING A COMPANY?

Based on your budget, timeline, and specifications we can help you build a shortlist of companies that perfectly matches your project needs. Schedule a free consultation with a Manifest Analyst.

TELL US ABOUT YOUR PROJECT