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

  • 91
    $10,000+
    50 - 249 Employees
    Dnipropetrovs'k Ukraine

    Cleveroad is a software development company founded in 2014. They have offices in Ukraine, the U.S., Norway and a team of over 100 specialists. They are focused on native mobile development, web development, IT strategy, web design, emerging technologies, and cross-platform solutions. 

     

    Clients
    Virgin Atlantic
    Blockbuster
    Octopus
    DPD
    Industries
    Notable Project

    Cleveroad designed and developed an iOS application that connects dancers all over the world. The app provides a place for users to chat and share content with each other. Users enjoy using the app and the client was impressed with Cleveroad's communication and quality of work. 

    “Users loved the application’s MVP for speed and functionality it brought. Cleveroad is a valuable partner due to their responsiveness and organized workflows helping to deliver high-quality work.”

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  • 92
    $10,000+
    50 - 249 Employees
    New York NY

    Unified Infotech is technology company headquartered in New York with another office in Kolkata, India. Founded in 2010, their team of 150+ works with enterprises, small to medium businesses, and startups as end-to-end solution partners for custom-tailored software, web, and mobile apps.

    Clients
    NBC Universal
    Citi Bank
    United Nations
    Sony
    Industries
    Notable Project

    Unified Infotech developed a home management platform that needed support creating a more user-friendly UI. They provided development, design, SA, and QA services for the client. They leveraged multiple technologies and went well beyond the original scope of work to create an improvement from the previous product. 

    the team went above and beyond once we set parameters for the process." – Co-Founder, Home Management Platform

  • 93
    $25,000+
    10 - 49 Employees
    Sarratt United Kingdom

    Clock Limited is a digital design and build company. Founded in 1997, the company is headquartered in Kings Langley, United Kingdom. They have a team of around 35 employees who focus on custom software, web, and mobile app development.

    Clients
    International Tennis Federation
    Leicester Tigers
    Northampton Saints
    Wall Street Journal
    Industries
    Notable Project

    Clock Limited redesigned a website for a news and media outlet. The team also built a custom CMS for the client. The site forms the foundation of the internal team's business.

    "The CMS is fantastic and they have been very receptive to our ideas, no matter how big or small." – Site Editor, News Outlet

  • 94
    $10,000+
    10 - 49 Employees
    Oakland CA

    Kalamuna is a web development and design agency founded in 2012. They have 15 employees based in their Oakland, Calif. office. The bulk of their services focus on full-service web development, from visual design to server-side operations. Kalamuna also offers custom software development and digital strategy consulting.

    Industries
    Notable Project

    A Bay Area media company hired Kalamuna to redesign its website after ending its relationship with a former web designer. Kalamuna focused on migrating the site from Drupal 6 to 7 and updating its visual aesthetics and usability. The site was fairly sophisticated and involved migrating content dating back to 2006. This client praised Kalamuna's project management skills and timeliness and appreciated the visual and functional upgrades to the website.

    "They care about what they're doing, and they'll speak up if they feel like there's a better approach. They have really high standards for user experience and user testing." – Technology Director, Media Company

  • 95
    $5,000+
    10 - 49 Employees
    Holly Springs NC

    RoleModel Software is a custom software development agency with headquarters in Holly Springs, N.C., and an office in Rochester, N.Y. Since 1997, their team of 18 has assisted in providing web development, web design, and mobile app development expertise to a wide range of clients in industries such as manufacturing, business services, and health care.

    Clients
    Lifeway
    Sayfa Systems Group
    Rapidair Products
    Industries
    Notable Project

    RoleModel Software was tasked by a higher education company to develop two web applications for their platform. The company also had RoleModel Software modify their mobile app using Ruby on Rails stack. RoleModel Software's services allowed the company to work more efficiently with updated functions. 

    "Everything met or exceeded our expectations. From the person leading the project down to the individual developers, communication overall was very good." – IT Manager, Higher Education Company

  • 96
    $5,000+
    10 - 49 Employees
    Philadelphia PA

    WebDevStudios is a website design and development agency based in Philadelphia. Founded in 2008, the team of 37 specializes in web development, web design, and application management and support.

    Clients
    Microsoft
    Campbells
    and Viacom
    Notable Project

    WebDevStudios provided web development and SEO for a boutique legal service provider. They redesigned and developed a WordPress site, incorporating SEO and mobile-friendly content. The client was impressed with the results of the product.

    “Within just a few weeks of the new website going live, we started getting client inquiries. Our colleagues are thrilled with the changes WebDevStudios made—it's exactly what we needed.” –CEO, Boutique Legal Service provider

  • 97
    $10,000+
    10 - 49 Employees
    Edinburgh United Kingdom

    GearedApp is a software development firm based in Edinburgh, Scotland. They were founded in 2013 and have a team of 11 employees who specialize in mobile development, web development, and UX/UI design. They work mostly with small business clients in the healthcare, business services, and education industries.

    Clients
    NHS
    Edinburgh University
    AWDis
    HR Solver
    Industries
    Notable Project

    GearedApp developed apps for a poultry breeding company. The client needed three different apps for its separate global brands. GearedApp took over from another developer and added several new functionalities, improving the design of the apps and decreasing their download times. The client was impressed by the improvements that were made to the product and the speed with which they were implemented.

    “They’ve improved both the apps’ design and functionality and dramatically reduced their download time.” – Assistant Marketing Manager  

  • 98
    $25,000+
    10 - 49 Employees
    Austin TX

    CURTIS Digital, Inc. is an Austin, Texas based web development firm that was founded in 2000. They have 10 employees and specialize in web development, custom software development, and UX/UI design.

    Clients
    American Campus(ACC)
    GGP - Brookfield Properties
    Motorola Solutions
    Zerba Technologies
    Industries
    Notable Project

    A student housing company hired CURTIS Digital, Inc. to create a new CMS and online resident portal. They designed the CMS based on wireframes that the client commented on and the resident portal allowed residents to submit payments online. The client was impressed with both products.

    "CURTIS Digital, Inc.’s CMS and web portal met our requirements perfectly." – VP of Business Intelligence, Student Housing Company

  • 99
    $5,000+
    10 - 49 Employees
    Minsk Belarus

    Flatlogic is a web and mobile development company based in Belarus, Minsk, with an additional office in Vilnius, Lithuania. Founded in 2015, the team of 11 specializes in web development, AI and mobile app development. They work primarily with midmarket clients, mostly in the eCommerce industry.

    Clients
    Optelos
    SC-Networks GmbH
    Rezbot
    Menschdanke GmbH
    Industries
    Notable Project

    Flatlogic worked on CMS development for a reservation platform. They developed an internal CMS and integrated it with internal APIs. The team worked with tight deadlines, collaborating with an in-house team. The client appreciated their consistent communication throughout the project.

    “They did a great job. We communicated through Slack and instant messaging, so we could contact them any time. We were also happy with their level of documentation and responsiveness.” – Cofounder, Reservation platform

  • 100
    $10,000+
    10 - 49 Employees
    Budapest Hungary

    Integral Vision is a web design and development agency based in Budapest, Hungary. Founded in 2009, they have grown into a 15-person team that mostly serves the Hungarian anEasternrn European markets with Drupal-based web and mobile applications. Integral Vision's services revolve entirely around web design, web development, and UX/UI design.

    Clients
    Speakerhub.com
    Eutraining.eu
    Ludwig Museum
    Hungarian National Museum
    Industries
    Notable Project

    Integral Vision recently partnered with several European nonprofits and government agencies to develop a web platform for migration-related services and events. The website can link immigrants and refugees with web access to humanitarian aid, legal services, medical help, and more. Additionally, it provides resources for supporters of migrants to help distribute aid or take political action to support pro-refugee policies. The information is conveniently displayed on an interactive map, with more complete listings accessible in several languages.

     

  • 101
    $75,000+
    10 - 49 Employees
    Somerville MA

    OHO Interactive is an interactive agency that provides web development, web design, and digital strategy services located in Somerville, Mass. Founded in 1998, they have a team of about 70 employees who support midmarket clients in a few industries: education, healthcare and medical, and nonprofit. 

    Clients
    Dartmouth College
    Harvard University
    Columbia Law School
    Norwich University
    Industries
    Notable Project

    OHO Interactive designed and developed a website for a university. They later redesigned the platform, migrating the site to Drupal 8.  They conducted market research, developed brand collateral, and managed initiatives to support a successful site launch. They produced high-quality code, which results in an intuitive website.

    “They work with us through any issues and produce a good final product.” – Former Director, University

     

  • 102
    $10,000+
    50 - 249 Employees
    Kharkiv Ukraine

    QArea is a development agency with offices in Kharkov, Ukraine and Beverly Hills, Calif. Since the company's founding in 2001, their team has grown to 211 employees. QArea specializes in web development, custom software development, and application testing. Most of their clients are small and mid-sized businesses.

    Clients
    Huff Post
    Dashlane
    Allwomenstalk
    SkyHook
    Industries
    Notable Project

    QArea developed an e-commerce platform for a tech firm. The challenging site build necessitated integrating Oracle and PeopleSoft. The client appreciated that QArea's developers were flexible and contributed high-quality work. 

    "The system has been great, profitable, and we are very happy with it. It has had no downtime, and there are no issues with it whatsoever."–President, Tech Firm

  • 103
    $10,000+
    50 - 249 Employees
    Rutland MA

    Scopic is a software development and creative digital marketing company from Boston. Founded in 2006, their team consists of over 280 developers, designers, and marketers from around the world.Their services include web, mobile, and desktop development, as well as digital marketing services such as SEO, content marketing, and social media marketing.

    Clients
    Houston Pump and Gear
    Thankster
    EponaTech
    dSurf
    Industries
    Notable Project

    Scopic’s team enhanced a woodworking software firm's overall online presence through careful evaluation of the company’s target audience. They created search engine optimized social media profiles, design templates, and produced consistent and effective social media posts. The team managed to grow the client's Instagram profile to 7,000 followers, resulting in higher engagement rates.

    “They have the tools necessary to communicate and manage a multi-person project team...Truly professional.” –  Founder and CEO, Woodworking Software Firm

  • 104
    $50,000+
    10 - 49 Employees
    Columbia MD

    Unleashed Technologies is a full service digital agency founded in 2007 and located in Columbia, MD. The agency has around 40 employees who are experts in web development, mobile app development, and web design.

    Clients
    Supernus Pharmaceuticals
    The United States Army
    American Marketing Association
    Sandy Spring Bank
    Industries
    Notable Project

    Unleashed Technologies created a new website for a CPA society. They used Drupal 8 to build a new site, which included the client’s association management system, specific education vendors, and custom design work. The client was happy with the new site and said that it had received praise from others in their industry. 

    “Hands down, they’re the best vendor I’ve ever worked with. I appreciate their planning, rigor, and transparency.” – Director of Technology, CPA Society
     

  • 105
    $50,000+
    10 - 49 Employees
    Austin TX

    Over the last 12 years, The BHW Group has completed 340 projects for 60 customers in 21 industries. The 14 employee team working out of Austin, Texas does mobile app and web development and design. They work on both iOS and Android apps, as well as enterprise apps and business process automation.

    Clients
    Chick-fil-A
    Sprinkles Cupcakes
    Deloitte
    Buxton
    Industries
    Notable Project

    The BHW Group was hired by a social network platform to build its website and mobile apps from the ground up. The founder of the company is very pleased with The BHW Group’s ongoing work.

    “If I was to start the process over again, I'd use the same team and not waste any time calling other people.” – Founder, Social Media Company

  • 106
    Undisclosed
    250 - 999 Employees
    Seattle WA

    Velocity Partners is a software development agency based in Seattle, with offices in Capital Federal, Argentina, Montevideo, Uruguay, and Medellin, Colombia. Since 2000, their team of around 400 employees has been specializing in web, custom software, and e-commerce development for mid-market and enterprise clients. They're known to partner with clients in a variety of industries including financial services, IT, and healthcare.  

    Clients
    Amazon
    Comcast
    Expedia
    Microsoft
    Industries
    Notable Project

    Velocity Partners put together several versions of a website for an entertainment company targeting kids and families. They also set out to improve coding and transition the site to Amazon Web Services. The client saw an increase in web traffic as a result of the partnership. 

    "They’ve helped us increase our traffic by improving the site’s loading time. Also, the automation that they utilized in the coding process helped us save a lot of money and time when building new components." —Project Manager, Entertainment Company

  • 107
    $10,000+
    50 - 249 Employees
    Toronto Canada

    openGeeksLab is an IT development company of around 50 employees, established in 2015. Their headquarters is in Toronto, Canada, with a second location in Zaporizhzhia, Ukraine. They offer services in mobile app development, web development, and blockchain. They serve small, midmarket, and enterprise clients in the business, energy, financial, and healthcare industries.

    Clients
    the Hub
    Knok
    SolarHome
    Magra
    Industries
    Notable Project

    A sports services company hired openGeeksLab to develop an app targeting the golf industry. They developed the backend with Node.js and the frontend with React Native, Flux, and RxJS. This app tracks and records golf scores, statistics, real-time performance, geolocation, and social media sharing. The client saw high user flow and a 45% increase in profit.

    “They constantly strive for excellence, which sets them apart from other companies. They build highly-professional apps, provide unique solutions, and respond to tough time challenges.” – CEO, Sports Services Company
     

  • 108
    $1,000+
    10 - 49 Employees
    Boston MA

    HTMLPanda, founded in 2014, is a website development company headquartered in Boston, with additional locations in Walpole, Mass., and New York City. The company’s team of 9 people focuses on web development, e-commerce development, and web design. They work with mid-market, enterprise, and small businesses for clients in the business services, IT, and financial services industries. 
     

    Clients
    Vodafone
    Intel
    Motorola
    Hewlett Packard
    Industries
    Notable Project

    HTMLPanda redesigned a clothing company's website on WooCommerce to improve its appearance and functionality. The site was originally on WordPress. HTMLPanda helped improve the client’s shopping cart and online store and provided any other technical support the client needed. The client was happy with the new, updated site, and the quality of the company’s work. 

    “The new site is much more user-friendly, functional and reliable. We are happy with the result, their quality of services is also very good. Sometimes I come up with ideas and they've already worked on what I was thinking of.” — Marketing Manager, Clothing Company 
     

  • 109
    $250,000+
    250 - 999 Employees
    Broomfield CO

    Gorilla Logic provides nearshore Agile teams to Fortune 500 and SMB companies, bringing unparalleled expertise in the delivery of full-stack web, mobile, and enterprise applications. Founded in 2002 and headquartered in Broomfield, Colo., they have over 500 employees and development centers in San José, Costa Rica and Medellín, Colombia. 
     

    Clients
    A Place for Mom
    Arrow Electronics
    DaVita
    Maxar
    Industries
    Notable Project

    Gorilla Logic provided a team of developers to help build a new software platform for an HR software company. Using Camunda and GraphQL they have worked to develop a back-end system on Apache Kafka.

    “Gorilla Logic has delivered exceptional resources that have increased the speed of development and improved the production timeline.” – Director, Human Resource Company

  • 110
    $10,000+
    50 - 249 Employees
    Rīga Latvia

    Diatom Enterprises is a software development and IT consulting company founded in 2004. The team of about 44 employees is headquartered in Riga, Latvia.  Diatom Enterprises offers a focused expertise in custom software development, SEO, IT strategy consulting, web development, and mobile app development. The firm's substantial client base includes notable companies who work in the technology and nonprofit sectors.

    Clients
    Microsoft
    Toshiba
    Sandisk
    Eurostar
    Industries
    Notable Project

    A rapidly growing real estate company needed to redevelop their website to account for their recent expansion. Diatom Enterprises' team of .NET developers conducted a comprehensive redesign of their ASP based website. They successfully implemented critical improvements to the platform's property listing, search, and featured properties elements.

     

  • 111
    $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
    American Library Association
    Causeway Capital Management
    City of Los Angeles
    CA
    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

  • 112
    $10,000+
    10 - 49 Employees
    Kharkiv Ukraine

    Founded in 2013, Valor Software is a software development agency that offers custom software development, web development, and web design services to the mid-market, small business, and enterprise clients. Their 50 employees are based out of Kharkiv, Ukraine.

    Clients
    Gapminder
    Stormpath
    Souqalmal
    Table's Ready
    Notable Project

    Valor Software recently worked on platform development for an IT non-profit. They worked on CMS, design, and backend development for that client.

    “Valor Software is very, very knowledgeable and very helpful.” — Project Manager, IT Non-Profit

     

  • 113
    $50,000+
    50 - 249 Employees
    Marlborough MA

    Based just outside Boston, MA, Boston Technology Corporation is a leader in mobile, web, and cloud-based app development. Since starting in 2004, BTC has expanded to almost 100 employees.

    Clients
    My Gene Counsel
    The US Food and Drug Administration
    Harvard School of Public Health
    Brown University
    Industries
    Notable Project

    Boston Technology Corporation was approached by a live-streaming company to create an iOS app that brings experiences events that are happening elsewhere to their customers. They created an intuitive user interface (UI) that users love.

    “I never had to say anything more than, ‘This is what I need for my business,’ and they understood that. I think that’s very rare among even the best development teams.” – Founder & CEO, Live-Streaming Entertainment Platform

  • 114
    $25,000+
    250 - 999 Employees
    Lake Oswego OR

    Founded in 2009, Unosquare, LLC is headquartered in Lake Oswego, Ore. with other locations in Guadalajara, Mexico, and Belfast, U.K. With more than 600 employees, they provide software testing and development services, combined with their staff augmentation services to meet software engineering needs, using nearshore development professionals.

    Clients
    Vesta
    Harvard Business Publishing
    Foundation Medicine
    Edwards Lifesciences
    Industries
    Notable Project

    A caller ID company hired Unosquare, LLC to provide software engineering and QA resources. Assisting on various projects, Unosquare provided daily support in all aspects of application development.

    "I have been most impressed with the caliber of the technical resources provided by Unosquare." – Senior Director Software Engineering, Caller ID Company

  • 115
    $10,000+
    50 - 249 Employees
    Los Angeles CA

    DevTeam.Space is a development agency that was founded in 2015 and is based in Los Angeles. Their team of 8 specialize in web development and mobile app development for small businesses; these clients primarily reside in the advertising, business services, and consumer product industries. 

    Clients
    Airbus
    Samsung
    Disney
    Yandex
    Industries
    Notable Project

    DevTeam.Space partnered with an e-learning company to build and customize and app for iOS that benefits students in the STEM program. This app built for the client enables students to have another resource for learning their coursework. The client was impressed with the development of the application and the students were impressed with the app's content. 

    "DevTeam was immensely helpful in crafting the project requirements, and working with ambiguity. The app they built was in iOS, and used state-of-the-art libraries and components to ensure future proofing. They have been able to figure out to deliver top shelf code at a fraction of the process." –– DevTeam.Space

     

  • 116
    $25,000+
    10 - 49 Employees
    Sunnyvale CA

    Founded in 2001, Dizzain is a full-service digital agency with locations in San Francisco and New York City. They have nearly 30 employees between the two offices. Most of their clients are small businesses from a diverse range of industries. Dizzain's services focus on web design and development, mobile application development, and custom software, but they also are equipped for just about any project that requires digital marketing or strategy.

    Clients
    Ziff Davis
    The Financial Times
    Kenshoo
    Todd Shelton
    Industries
    Notable Project

    A digital art publication hired Dizzain to redesign its WordPress site and develop a mobile app. Since helping the publication upgrade to WordPress' premium service, Dizzain has handled their entire digital presence. The publication was invited to Google's Field Trip program, which required the development of a GPS-enabled mobile app that provides cultural background on local art attractions, and they hired Dizzain to develop this app as well.

    "We’ve easily doubled our viewership in the past 5 years. A big part of that has been the changes we’ve made in collaboration with Dizzain, as well as their design work." – Managing Editor, Digital Art Publication

  • 117
    $25,000+
    10 - 49 Employees
    Warszawa Poland

    Sunscrapers is a Warsaw, Poland based firm that specializes in web and custom software development. They have been in operation since 2010 and have 29 employees. They primarily work with small businesses and midmarket clientele in the IT sector.

    Clients
    15Five
    Asus
    Canon
    Caris Life Sciences
    Industries
    Notable Project

    A financial services company hired Sunscrapers to build a data science platform. They created a toolset for Windows along with a cloud-based data warehouse solution. The project allowed the client to launch a new data initiative and they were impressed by Sunscrapers' team's expertise. 

    "They don't get distracted or flustered, and they focus on delivery. Plus, their knowledge of Python is extensive and deep." - Data Engineering Director, Financial Services Firm

  • 118
    $25,000+
    50 - 249 Employees
    Poznań Poland

    Full-stack development company with 150 experts on board who build complex digital products for clients worldwide looking to outsource software development to professionals. The company is based in Poznań, Poland and was founded in 1999. Merixstudio’s key expertise is delivering web applications and cross-platform mobile apps. They also provide full project management support, quality assurance, and product design services.

    Clients
    The Juilliard School
    Toshiba
    GS1
    SendinBlue
    Industries
    Notable Project

    Merixstudio used React and Node.js to develop a web platform for a procurement software solution. They provided excellent feedback on the site’s architecture to ensure that they delivered a quality product.

    “Working on a tight timeline, Merixstudio delivered a top-notch product that satisfied the project’s needs. Their team was on top of the project at all times, proactively coming up with creative solutions. Unique to this partnership, the two teams fostered honesty and productive communication.” - Co-Founder & CTO, Procurement Software Solution

  • 119
    Undisclosed
    250 - 999 Employees
    Mountain View CA

    Emerline is a software engineering company headquartered in Mountain View, Calif., with an office in Minsk, Belarus. Since 2011, their team of 93 has offered services in custom software, web, and mobile app development to clients ranging from startups to large firms. They have worked in various industries in the past, such as IT, financial services, and business services. They are also familiar with Django and .NET, among other frameworks.

    Industries
    Notable Project

    Emerline provided CRM-based solutions for an e-commerce development firm. Emerline primarily helped out on customer segmentation, as the firm's customers used Magento and Shopify platforms. Emerline used Python, MySQL, and JavaScript to develop said solutions. The project streamlined the firm's processes.

    "Everything they do is done nicely, and without any delays or mess-ups." - CMO, E-commerce Development Firm

  • 120
    $10,000+
    10 - 49 Employees
    Kyiv Ukraine

    AVA.codes is a front-end development company with offices in Berlin and Kyiv, Ukraine. Founded in 2017, their 20+ are experts in web development and keeping a narrow focus on programming user interfaces.

    Clients
    TraceSafe(CNSX: TSF)
    Shopify(NYSE: SHOP)
    Deloitte
    SkillDirector
    Industries
    Notable Project

    AVA.codes is the go-to developer for a marketing agency. For a recent project, they redeveloped templates to handle the capacity of new, complex functionalities. The client is extremely impressed with the agency's project management. 

    "Their project management is very impressive. AVA is always on time and provides high quality. You can tell that their developers care about what they produce and use their intuition to solve or translate complex requirements into real results." – Managing Director, Marketing Agency

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