Top 100 JavaScript Development Companies in San Francisco
The Best of December 2025Looking for a top JavaScript developer in San Francisco?
If you're hiring a JavaScript developer to help you build or update a website that's responsive and interactive, consider the pros and cons of JavaScript as a programming language. Advantages include its speed because it's executed on the client-side; reduction in server load; and diverse functionality. Disadvantages to consider include security such as bugs on the client-side.
To assist you in your search for a partner, we’ve compiled this list of the top JavaScript development agencies in San Francisco. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best San Francisco JavaScript Developers
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1$10,000+50 - 249 employeesSan Francisco, CARead More
AirDev is a San Francisco based software development company. They were founded in 2015 and have a team of 11 employees who specialize in the custom software, web, mobile app development.
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HPIndustries
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2$50,000+1,000 - 9,999 employeesSan Francisco, CARead More
Toptal is a private network of freelance technologists and designers. With more than 2000 freelance workers in its exclusive community, Toptal can be instrumental in finding the right freelance partner for development projects. The community includes developers for any platform, finance experts, and designers of both visual material and graphic interfaces. Because of its screening process, Toptal combines the reliability and expertise of an agency with the flexibility and affordability of freelance work.
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Toptal clients include J.P. MorganIndustries
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3$10,000+250 - 999 employeesSan Francisco, CAGeekyAnts is a Bengaluru, India-based custom software development firm. The midsize team provides Custom Software Development, Mobile App Development, Web Development, Artificial Intelligence, and more. The firm was launched in 2006.Read More
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Siveco Romania Olive Garden Darden KhataBookIndustries
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4$25,000+1,000 - 9,999 employeesLondon, EnglandSoftware development company Vention is headquartered in New York, New York; Marietta, Georgia; Woodbridge Township, New Jersey and London, England. The large team provides Custom Software Development, IT staff augmentation, Web Development, Mobile App Development, and more. The firm was established in 2002.Read More
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IBM PayPal pwc IC MarketsIndustries
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5$1,000+1,000 - 9,999 employeesEdinburgh, ScotlandProbey Services is a web design company founded in 2016. The large team specializes in Web Design, Web Development, Mobile App Development, and Custom Software Development. The agency is based in London, England; New York, New York; Noida, India and Toronto, Canada.Read More
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6$5,000+50 - 249 employeesSan Francisco, CAWeb design agency UPQODE was launched in 2015. They are based in Nashville, Tennessee; New York, New York; Tampa, Florida and Seattle, Washington and have a midsize team. UPQODE focuses on Web Design, Web Development, UX/UI Design, Custom Software Development, and more.Read More
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Gracenote - Entertainment ProvidersIndustries
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7Undisclosed50 - 249 employeesSan Francisco, CAWebsite development company and artificial intelligence company Yellow is in San Francisco, California; Paris, France; T'bilisi, Georgia and Cape Town, South Africa. The midsize team specializes in Web Development and Artificial Intelligence. The firm was launched in 2015.Read More
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Fusion MarketsIndustries
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8$25,000+50 - 249 employeesSan Francisco, CARead More
Founded in 2009, MindK is a software development company that specializes in web, custom software, and mobile app development. Their team of 56 employees, based in San Francisco, partners with small business and midmarket clients in the financial services, advertising, and media industries.
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AdidasIndustries
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9$50,000+250 - 999 employeesSan Francisco, CAEmpat is an app development company established in 2013. They are in San Francisco, California; Kyiv, Ukraine; London, England and Miami, Florida and have a midsize team. Their services include Mobile App Development, Custom Software Development, and Web Development.Read More
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Obimy — A mobile app connecting loved ones across distances with over 10 million downloads on iOS and Android. Enables seamless communication and emotional connection. Mobile app development and social networking focus. Bigsister — Custom AI software designed for sales performance tracking and analysis, providing clean, accurate data to optimize sales teams and improve efficiency with advanced analytics. Trigga — A fintech project featuring payment systems and a comprehensive analytical database to support secure transactions and financial insights for smarter decision-making. DentalCare — Healthcare ecosystem with mobile app, web development, and CRM tools for managing patient records, tracking appointments, and sending automated reminders to improve patient care.Industries
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10$10,000+50 - 249 employeesBerkeley, CARead More
Founded in 2016, Crowdbotics is a development company based in Berkeley, Calif. They work with businesses of all sizes in the business services, consumer products, and healthcare fields.
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StripeIndustries
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11$10,000+50 - 249 employeesKyiv, UkraineOVERCODE is a web development firm established in 2018. The agency specializes in Web Development, Mobile App Development, Web Design, UX/UI Design, and more and has a midsize team.Read More
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SignifAI (New Relic)Industries
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12$50,000+50 - 249 employeesSan Francisco, CARead More
Cybercraft Inc. is a development agency headquartered in Lviv, Ukraine, that was established 2012. Their team of 19 offers custom software development, IT staff augmentation, web development, and more.
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Palo Alto NetworksIndustries
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13$10,000+50 - 249 employeesSan Francisco, CARead More
Founded in 2012, SF AppWorks is a digital agency that produces innovative technologies for mainly midmarket companies. Based in San Francisco, their team of 50+ specializes in web development, mobile app development, UX/UI design, and custom software development.
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West ElmIndustries
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14$25,000+10 - 49 employeesSan Francisco, CATogether is a branding company launched in 2018. The small team specializes in Branding, UX/UI Design, Product Design, Web Development, and more. The agency is located in London, England; New York, New York and San Francisco, California.Read More
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UnitIndustries
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15$10,000+50 - 249 employeesSan Francisco, CADouble Coconut is a mobile application development firm. They are in San Francisco, California and Yerevan, Armenia and have a midsize team. Their services include Mobile App Development, Web Development, Blockchain, and Custom Software Development. The firm was founded in 2011.Read More
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EA Sports | Madden NFL Microsoft Casual Games Ellen Degeneres OTG GamesIndustries
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16$10,000+10 - 49 employeesOakland, CARead More
Founded in 2021, Nimi Tech Limited is a small software development firm based in Oakland, California; Colombo, Sri Lanka and Chennai, India. Their services include custom software development, web development, mobile app development, IT staff augmentation, and more.
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17$25,000+10 - 49 employeesSan Francisco, CASavas Labs is a small web development company founded in 2013. Their services include Web Development, Web Design, UX/UI Design, Custom Software Development, and more. The agency is located in New York, New York; San Francisco, California; Boston, Massachusetts and Washington, District of Columbia.Read More
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Harvard University Environmental Defense Fund Adobe NPRIndustries
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18$25,000+50 - 249 employeesSan Francisco, CASudolabs is an AI firm in Košice, Slovakia; San Francisco, California; San Francisco, California and West Hollywood, California. They offer Artificial Intelligence, AI Consulting, UX/UI Design, IT strategy consulting, and more and were founded in 2017.Read More
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The Expert (https://www.theexpert.com/)Industries
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19$25,000+50 - 249 employeesWarszawa, PolandMobile app development firm Orangesoft is based in Warszawa, Poland; Sheridan, Wisconsin and San Francisco, California. The midsize company was established in 2011. Their team offers Mobile App Development, Custom Software Development, Web Development, and IoT development.Read More
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Hamleys Yukon Advanced Optics Worldwide CoachNow Liquid BarcodesIndustries
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20$25,000+250 - 999 employeesSan Francisco, CARobosoft Technologies Inc. Is a San Francisco, California-based app development company. They offer Mobile App Development, UX/UI Design, Web Development, Custom Software Development, and more and were launched in 1996.Read More
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Warner Bros. Discovery HSBC McDonalds Mercury FinanceIndustries
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21$10,000+10 - 49 employeesSan Francisco, CARead More
PLATFORM, based out of San Francisco, CA, is a UX/UI agency that also engages in web and mobile app development. The majority of their clients are small businesses, though they work with enterprise and midmarket businesses as well. PLATFORM has done projects in advertising, financial services, information technology, and real estate, among others.
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SpotifyIndustries
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22$5,000+10 - 49 employeesSan Francisco, CABurst Digital is a social media marketing agency founded in 2018. Their small team is located in London, England; New York, New York and San Francisco, California. The company offers Social Media Marketing, Web Design, Branding, Search Engine Optimization, and more.Read More
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Vivienne Westwood - The Vivienne Foundation Artisan AI Cogency Global Moonbeam Car WashIndustries
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23$25,000+10 - 49 employeesSan Francisco, CARead More
Cylogy Inc. Is a website development firm. They are located in San Francisco, California and have a small team that provides web development, application management & support, digital strategy, IT strategy consulting, and more. The company was founded in 2001.
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24$100,000+1,000 - 9,999 employeesSan Francisco, CARead More
Headquartered in San Francisco, Wizeline is a global technology services provider with delivery centers in Mexico, Colombia, Spain, and Vietnam. Since its founding in 2014, Wizeline has grown to over 1,300 employees specializing in product/platform development, UX design, data & AI, cloud & DevOps, and product evolution services.
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Fitz Frames -
25$1,000+10 - 49 employeesSan Mateo, CABinstellar Technologies Pvt. Ltd. Is a small mobile application development company. Established in 2021, the agency is based in Ahmedabad, India and San Mateo, California. Their services include Mobile App Development, UX/UI Design, E-Commerce Development, Branding, and more.Read More
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Test RoutesIndustries
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26$25,000+50 - 249 employeesSan Francisco, CARead More
Grio is a software consulting firm based in San Francisco, Calif, that was established in 2008. Their team of 50 employees offers web development, mobile app development, and UX/UI design services.
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27$50,000+50 - 249 employeesSan Francisco, CAFounded in 2017, Sprint Studios is an IT staff augmentation company. Their midsize team is headquartered in San Francisco, California; San Juan, Puerto Rico; Miami, Florida and New York, New York. Their services include IT staff augmentation, Custom Software Development, Web Development, Mobile App Development, and more.Read More
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SnapptIndustries
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28$25,000+50 - 249 employeesSan Francisco, CALocated in San Francisco, California; San Ramon, California and Lahore, Pakistan, Kwanso LLC is a custom software development firm. They focus on Custom Software Development, Web Development, Mobile App Development, IoT development, and more and were founded in 2012.Read More
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US NewsIndustries
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29$10,000+50 - 249 employeesSan Francisco, CARead More
The Rocked Code is a custom software development firm. Their midsize team is located in Ciudad de México, Mexico. Their services include custom software development, other IT consulting and SI, application management & support, product design, and more. The agency was established in 2016.
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Coru Creze Hexalud SEOS EnergyIndustries
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30$10,000+50 - 249 employeesSan Mateo, CARead More
Cider is a software development company located in San Francisco. Founded in 2015, their 5 employees provide software development, marketing, and web design services to ecommerce clients.
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HPIndustries
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