Top 100 JavaScript Development Companies in Boston

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. 
 

Zero Negative is a web and mobile app development firm based in Boston. Founded in 2014, their small team of 8 focuses on providing a boutique experience to clients seeking tailored web, creative, and mobile solutions.

Create + Conquer is a digital agency that specializes in web design and development, as well as UX/UI design and digital strategy. Based in Boston, MA, Create + Conquer is composed of fewer than 10 employees and is committed to serving mostly mid-market businesses in the business services and non-profit industries.

UPQODE is a website design and development agency based in Nashville, Tennessee. Founded in 2015, the team of 40+ specializes in web development, web design, and e-commerce development. They work with small businesses, focusing on information technology, e-commerce, and business services.

Since 2011, Ajackus's team of about 20 engineers has provided web development, mobile app development, and UI/UX design to clients in 5 different continents around the world. 

Third & Grove is a web development firm headquartered in Boston with an additional office in San Francisco. Founded in 2013, they have 34 employees and have worked with well-known brands in sectors such as food & beverage and financial services. Third & Grove provides web design and development, e-commerce development, UI/UX design, and digital strategy for primarily midmarket-sized clients. 

Established in 2015, NL Softworks is a small web development firm. Their team focuses on web development, web design, custom software development, application management & support, and more. The company is based in Marblehead, Massachusetts.

A tech frontrunner since 1989, Zco is a full-stack app development firm offering web, mobile, and animation services. Headquartered in Nashua, New Hampshire with a Boston office, the 200+ specialists comprise a powerhouse team with outstanding and varied proficiencies.

The Gnar Company, Inc. is a computer software company based in Boston and founded in 2015. Their team of around 15 provides a variety of services including custom software, mobile app, and web development. They often partner mid-sized and enterprise businesses in a large number of sectors. 

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. 

Founded in 2000, Blink UX has almost 20 years of experience in the IT sector. True to their name, Blink UX specializes in UX/UI design but also offers mobile and web development, research, strategy, and design services.

Boston software and web development company Vermonster offers full-service design and development for applications across platforms. Prioritizing visual design and user experience, Vermonster's 20-person team has produced digital experiences for clients in sectors from medicine to education to government. With a focus on Ruby on Rails and JavaScript, Vermonster's robust development team has created web apps, desktop software, sophisticated chatbots for Facebook and Slack, and mobile apps for a number of high-profile clients.

Dedicated Developers are a web, mobile app, and e-commerce development firm based in Alpharetta, GA, with an office in Castro Valley, CA. This 50+ team has been offering top-tier digital solutions and frictionless project management since 2007.

Involution Studios is a software services firm based in Arlington, Mass. Founded in 2004, the team of 13 specializes in web design and development, mobile app development, and custom software development. They focus on business services, healthcare & medical, and information technology.

Founded in 2001, Going Clear Interactive is a web design and development company based in Boston, MA. With fewer than 10 employees, GoingClear Interactive has nearly two decades of experience working with mostly small and mid-market businesses. Their services include web design, web development, and e-commerce development.

Kevin Leary is a freelance web developer based in Boston who specializes in single page app development. With a background in Angular, data visualization, and analytical UX/UI, Kevin helps build web applications and websites for clients across the U.S. Founded in 2007, kevinleary.net creates custom WordPress themes and plugins for clients and writes code for large brands.

MESH Interactive Agency is a full-service content marketing agency based out of Boston. Founded in 2006, the team of 11 specializes in advertising, branding, and content marketing. 

OrangeLoops is a software development company headquartered in Boston, with an additional office in Montevideo, Uruguay. The company, founded in 2015, has a team of 22 people who exclusively provide mobile app development and web development services. They work with mid-market businesses that are mostly in the advertising & marketing, health care & medical, and retail industries. 
 

SumatoSoft is a web and mobile app development company that's located in Minsk, Belarus. Founded in 2012, they serve a variety of small and midmarket businesses. Services include web development, IoT development, and mobile app development. They have about 55 employees. 

Mobile application development company WillowTree, Inc. was founded in 2007. With headquarters in Charlottesville, Va., and offices in New York and Durham, N.C., WillowTree has a team of 200+. They offer full-service development for both iOS and Android platforms, including mobile strategy, user experience design, testing, launching, and maintenance. 

Founded in 2009, Traktek Partners is a marketing agency headquartered in Needham, Mass. With a focus on mid-market and enterprise companies, a team of 14 specializes in web development, web design, digital strategy, marketing strategy, and PPC. Traktek Partners' clients are typically in the hospitality, leisure, health care, and information technology industries.

Founded in 2015, SERPCOM is a full-service digital marketing agency based in Boston, Mass., with an additional location in Quincy, Mass. With a team of 7, SERPCOM focuses on SEO, web development, and web design. The travel company appreciated that SERPCOM was proactive in proposing website upgrades, including improved security features. With SERPCOM's assistance, the travel company experienced a 100% increase in web traffic.

Echo&Co is a primarily UX/UI agency headquartered in Somerville, Mass., with satellite offices in Louisiana, Virginia, Michigan, and British Columbia. It is a full service digital agency of about 20 employees. In addition to UX/UI, Echo&Co provides web development and product design services. The agency works primarily with midmarket businesses.

Mpire Solutions is a Boston based software development company. They were founded in 2010 and have a team of 11 employees who specialize in UX/UI design, custom software development, and digital strategy.

Revox is a small user experience company. Founded in 2015, the agency is based in Nugegoda, Sri Lanka. Their team specializes in ux/ui design, custom software development, blockchain, IoT development, and more.

FastForward, a small AR/VR development company, is located in Salem, Massachusetts. They focus on AR/VR development, mobile app development, and web development and were founded in 2013.

Next Idea Tech, Inc is a custom software development firm headquartered in Beverly, Mass. Founded in 2018, the team has less than 10 employees who primarily provide custom software development and web development services. They work with mid-market and small businesses and work in the health care & medical, e-commerce, advertising & marketing industries. 
 

Website design and software development agency Smile MEDIA was founded in 2011. With headquarters in Exeter, New Hampshire, and offices in Dover, New Hampshire and Boston, they have a team of five. They specialize in web design, web development, and digital strategy and have worked with clients in advertising, business services, and financial services industries. 

Aclarify is a small custom software development firm based in Boston, Massachusetts. They provide custom software development, mobile app development, web development, enterprise app modernization, and more and were founded in 2022.

Zagaran, Inc. is a Harvard-alumni led software development company headquartered in Boston, MA that offers web development, custom software, and mobile apps. Their team has provided software development for clientele ranging from Global 500 companies to universities to government agencies, working primarily with Python, Django, and React/Angular.