Looking 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. If you need more support, tell us about your project, and we'll match you with recommended companies.

List of the Best San Francisco JavaScript Developers

  • 1
    $50,000+
    1,000 - 9,999 Employees
    San Francisco CA

    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.

    Clients
    HP Enterprise
    AirBnB
    J.P Morgan
    Pfizer
    Industries
    Notable Project

    One of Toptal's most impressive clients is a machine learning and artificial intelligence platform for marketing. The sophisticated nature of the project required expert developers familiar with cutting-edge technology and complicated programming principles, and Toptal's freelance screening service enabled the client to find freelancers with the right skills quickly. The varying needs of the project made Toptal the right choice because they could easily expand and shift the focus of their development team.

    "Toptal made it easy to work with the team. If there was ever anything wrong, it was fixed quickly." – Co-founder, Advertising Technology Firm

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  • 2
    $50,000+
    50 - 249 Employees
    San Francisco CA

    Tivix is a digital product development and design company headquartered in San Francisco, with offices across the US, UK, and Europe. Founded in 2008, they have over 90 employees who serve startup, midmarket, and enterprise clients across diverse industries such as FinTech, health care, manufacturing, government, and nonprofit. Tivix reduces engineering risk for clients by offering rapid time-to-market while delivering standards-based code that can be transitioned to an internal team at any time. Their focus is building both internal and consumer-facing digital products that drive business growth. Services include product management, UX/UI design, full-stack software engineering, and DevOps

    Clients
    Zoetis
    Apple
    Tesla
    UNICEF
    Industries
    Notable Project

    Tivix worked with an intergovernmental military alliance to rebuild a mission-critical software system. If and when submarines in international waters come into distress, the organization plans and coordinates the rescue effort of such submarines. Tivix was given complex system requirements and asked to come up with an effective design and solution that would replace a decades-old system. The client was incredibly impressed at every stage of the engagement, with Tivix delivering detailed systems and user-experience design, followed by robust development and operationalization of the system internationally. 

    Every single milestone has been met exactly on time. The company has met every requirement, both in terms of time as well as quality.” Maritime Service Owner, Intergovernmental Military Alliance

  • 3
    $50,000+
    1,000 - 9,999 Employees
    Walnut Creek CA

    Exadel is a custom app, web, and software development firm focusing on enterprise-level solutions, IoT, and product development. Founded in 1998, their 200+ team is based in the Bay Area with offices in Boulder, CO, and 13 Eastern European locations.

    Clients
    AT&T
    GE
    Deutsche Bank
    Hewlett Packard
    Industries
    Notable Project

    Following an early partnership, Exadel created an open-source and highly sophisticated IAM (Identity and Access Management) solution for enterprise use. From research to discrete data integrations, strategic roadmapping to cloud-delivery services – they wowed the client with their personal dedication, seamless communication, and resource management.

    “When it comes to open-source, their expertise is unparalleled. They knew what they were doing … They're true experts.” – Former Chief Security Architect, Fortune 500 Healthcare Company

  • 4
    $10,000+
    50 - 249 Employees
    San Francisco CA

    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. 

    Clients
    West Elm
    Vanguard
    AARP
    Covia
    Industries
    Notable Project

    A senior living facility provider hired SF AppWorks to developed their own invoice solution. The team used AI languages to produce a platform that integrates well with their general ledger system. The project was completed in a timely manner. 

    "We had a great experience working with SF AppWorks from start to finish."– VP of IT, Senior Living Service Facility Company

  • 5
    $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

  • 7
    $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.

    Clients
    : Berkeley EECS
    Progenity.com
    Arizona State University
    Space Foundation
    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

  • 8
    $100,000+
    50 - 249 Employees
    San Francisco CA

    ArcTouch was founded in 2008 and has offices in San Francisco, Calif., New York, and Florianópolis, Brazil. They excel at app development, blockchain, and UX/UI design. They guide their enterprise clients through the app building process by defining a strategy for the best user experience, planning the visual design, developing and testing the prototype, and ensuring optimization and growth.

    Clients
    Yahoo!
    Adidas
    Audi
    3M
    Industries
    Notable Project

    A California-based content discovery startup hired ArcTouch to design a content discovery platform and iOS app. They provided feedback on the startup's user stories, created wireframes, and developed the platform and app. The project was completed ahead of schedule.

    “We’re astonished at the quality of the work. We’re a small company, and we weren’t expecting the same level of service a Fortune 500 company might enjoy. We were amazed by their design and the effort that went into every screen.” – Senior Project Manger, Content Discovery Startup

  • 9
    $5,000+
    10 - 49 Employees
    San Francisco CA

    Founded in 2015, Geekbears is a UX/UI design and development firm. Based in San Fransisco and with a team of under 15 employees, they focus on UX/UI design, along with mobile and web app development, and IT strategy and consulting. They serve solely small businesses across various industries.  

    Clients
    UC Berkeley
    Indeed
    Hangurs
    Dumpling
    Industries
    Notable Project

    Geekbears did UX design and front- and backend development to create a fashion rental app. They used existing wireframes to create the app for iOS. Their work helped change an idea into a tangible product, achieving the client's main goal. 

    "In taking an idea from paper into existence, GeekBears has gone above and beyond. " – Creative Director, Fashion Rental App

  • 10
    $25,000+
    50 - 249 Employees
    San Francisco CA

    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.

    Clients
    Rivals.com
    Fitbit
    Texture
    Capital One
    Industries
    Notable Project

    Grio built a web app that allows remote access to an electroencephalogram device for a medical-device manufacturer. Their team developed the frontend using React and the backend using Node.js and Ruby on Rails. The app received significant positive feedback.

    "The team’s willingness to take on new challenges distinguishes them from other development vendors that only specialize in specific technologies or types of applications." – CTO, Medical Device Manufacturer

  • 11
    $50,000+
    250 - 999 Employees
    San Francisco CA

    Headquartered in San Francisco, Wizeline is a global product development company with offices in Guadalajara and Mexico City, Mexico, and Ho Chi Minh, Vietnam. Since its founding in 2014, the team has grown to over 390 employees. Wizeline specializes in custom software, web, and mobile app development and UX/UI design. 

    Clients
    Mastercard
    Dell
    WSJ
    Australian Open
    Notable Project

    An entertainment company hired Wizeline to improve their website's CMS. Based on the team's initial success, they fostered a partnership that's still ongoing. The agency's skills made them stand out from comparably firms throughout the process. The client appreciates Wizeline's collaborative spirit and excellent communication skills. 

    "They have quickly learned our system, made helpful suggestions, and been very collaborative."–Senior Product Manager, Entertainment Company 

  • 12
    $25,000+
    250 - 999 Employees
    Los Altos CA

    Menlo Technologies is a global services based in Santa Clara, Calif., with an additional office in Hyderabad, India. Since 2010, Menlo Technologies' team of over 150 employees has specialized in custom software development, mobile app development, and web development. The client appreciated Menlo Technologies' ability to collaborate despite a time difference between the two teams.

    Clients
    GoPro
    Apple
    LinkedIn
    Target
    Industries
    Notable Project

    Menlo Technologies was hired by a technology solutions firm for a series of development projects, including iOS and Android apps. The client's goal was to obtain additional support for their in-house team.

    "There have been some projects with tough timelines, but Menlo Technologies went above and beyond for them."- President, Technology Solutions Firm

  • 13
    $5,000+
    10 - 49 Employees
    Fremont CA

    Headquartered in Minsk, Belarus, Webspace is software development agency that specializes in web development and mobile app development. Their team of 10 work with small businesses in the health care, business services, education, and retail industries. 

    Clients
    SNYPUR
    iGen Learning Center
    Zinc Platform
    Industries
    Notable Project

    Webspace partnered with an academic platform to build a portal that could streamline payment processes, automate delegation of products, and record keeping to mange the writers on each task. The project was successful in streamlining processes for the company to be more effective. 

    “They were communicative and forthcoming to our questions and needs. They explained every question we had to each member of our team to ensure our understanding.” –– Founder & CEO, Academic Platform

  • 14
    $10,000+
    50 - 249 Employees
    San Francisco CA

    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. 

    Clients
    Y-Combinator
    Bridgespan Group
    Teach for America
    Notable Project

    AirDev worked on web development for a travel platform. They guided the client through a planning phase for the site, then used those designs and decisions to develop the site fully. The client was impressed with the finished site.

    “AirDev put our prototype in front of users quickly, which exceeded my expectations. They delivered a quality product at a reasonable price.” – CEO, Travel Platform
     

  • 15
    $50,000+
    10 - 49 Employees
    San Francisco CA

    Dayspring Technologies is a custom software and web development firm founded in 1997. They have just under 30 employees based in their San Francisco office. Much of their work focuses on custom software development for in-house platforms, but they also build client-side web apps, user interfaces, and e-commerce platforms.

    Clients
    Golden State Warriors
    BSNSports
    The North Face
    MercyCorps
    Industries
    Notable Project

    Dayspring Technologies built an MVP for an online marketplace that matches healthcare workers to health organizations. They identified the tech stack, developed a web app and mobile app from scratch, and provided UX to support the product. The client was impressed with their project management. 

    "Dayspring Technologies is different. They’re highly organized and make sure the project is on track." – CEO, Online Marketplace

  • 16
    $10,000+
    2 - 9 Employees
    Oakland CA

    State Creative is a web design and development company located in Oakland, CA. Founded in 2000, State Creative's team of nearly 10 employees also offer e-commerce development. They serve small and mid-market businesses in the business services, finance, and consumer products industries.

    Clients
    UC Berkley
    California Association of Food Banks
    Litman Gregory
    Industries
    Notable Project

    From August 2016 to January 2017, State Creative worked with a freight service provider to develop a new website. State Creative built and designed the site on WordPress. They also offered content consulting to help the client develop useful content. The client was impressed with State Creative's range of skills and services.

    "State Creative assisted with everything from the design, suggestions for content, revisions, completion, and the build out of the website. They also gave us training on how we can maintain certain aspects of the site ourselves. They completely rebuilt the website on WordPress." – VP, Freight Service Provider 

  • 17
    $50,000+
    50 - 249 Employees
    San Francisco CA

    Koombea is a digital product development company headquartered in New York with locations in Miami, San Francisco, and Barranquilla, Columbia. Founded in 2007, the company has a current team of around 100, specializing in custom software development, web development, and mobile app development. They primarily serve midmarket businesses in the IT, healthcare, and education industries.

    Clients
    Disney
    WellMatch
    Sendgrid
    OpenEd
    Industries
    Notable Project

    Koombea transitioned a home improvement company's e-commerce website to Shopify Plus. Using Ruby on Rails, the team created an intermediate platform to facilitate the migration between Shopify and the client's back office. Since launching the new site, the client's sales have skyrocketed.

    "We have the most stable e-commerce platform. We had a huge increase of 700% in sales." — CIO, Home Improvement Company

  • 18
    $100,000+
    10 - 49 Employees
    San Francisco CA

    This California-based software company has strong expertise in web and mobile app development. The team of less than 50 has worked in various industries, from fitness to healthcare – they’ve done it all.

    Clients
    Google
    HP
    Aruba Networks
    LegalZoom
    Industries
    Notable Project

    Impekable designed the interface and illustrations for a dating service app. The company was looking for an agency to expand on the features that the popular app already had. Unlike their experience with other vendors, the dating app said Impekable was able to produce the product quickly.

    “I'm most impressed by their ability to create high-quality designs at a very fast pace. Their team not only puts a tremendous amount of focus on client projects, but they're also creative, thought leaders when it comes to design concepts.” – Co-Founder, Dating App

  • 19
    Undisclosed
    2 - 9 Employees
    Oakland CA

    HyperArts is a website design and development company based in San Francisco, CA. HyperArts' intimate team of nearly 10 people specializes in website design, development, and maintenance, as well as UX/UI design for WordPress and Drupal sites. They mainly serve small business clients.

    Clients
    Berkely Labs
    UC San Francisco
    UC Berkely Crossroads
    Eventbrite
    Industries
    Notable Project

    From September 2012 to February 2014, HyperArts worked with a large international library to build an accessible research network and revamp its website. The client was impressed with HyperArts' project manager and pleased with the new website and research database. 

    "Having [this] project manager was critical to getting the website launched because he was able to break things down. He’s an exceptional project manager. He brought in two programmers to work with us, as well as an artist who worked on the look of the new website." – Administrator, National Library

  • 20
    $25,000+
    50 - 249 Employees
    Orinda CA

    Based out of Orinda, CA with satellite offices in India and Croatia, Daxima is a software development company. The team of more than 50 employees has been in business since 2003. They provide web, software, and mobile app development for clients around the world.

    Clients
    T-Mobile
    Cisco Systems
    Savi Technology
    Berry Appleman & Leiden
    Industries
    Notable Project

    Daxima worked with a financial institution to update its client management system. The system had not been updated in 2 years and all changes required consensus from a co-op. Daxima completely redeveloped the client management system, incorporating the ability to aggregate data, integrate external programs, and grow along with the business.

    "They found out what our wishlists and issues were and worked closely with the people on our team." – VP of Operations, Financial Institution

  • 21
    $1,000+
    50 - 249 Employees
    San Jose CA

    IDS Logic is a software development company founded in 2007. Based in Noida, India, the team of 100+ specializes in web development, e-commerce development, and mobile app development. 

    Clients
    Statesman Travel Group
    The Lens Pal
    Pickfords
    Notable Project

    IDS Logic worked e-commerce web development for a mirror supplier. The team developed an e-commerce website and a CRM on the Magento 2 platform. The services they provided included testing, bug fixes, and service support. Overall, the client was pleased with the team's work. 

    "IDS Logic launched the website as expected. They fixed bugs immediately after completing comprehensive testing. The team accommodated and processed several changes in the week leading up to the launch." – Former Digital Marketing Manager, ​​​​​​Mirror Supplier

  • 22
    $25,000+
    2 - 9 Employees
    Oakland CA

    Mangrove Web Development is a custom web development agency that offers web design, web develppment, and SEO services to their clients. Founded in 2009, their team is made up of 10 employees with their offices located in Oakland, Calif. and Truckee, Calif.

    Clients
    The Mighty Networks
    Wikimedia
    Off The Grid
    Notable Project

    Mangrove Web Development recently worked on web development for a startup accelerator. They  rebuilt the website and created a new online face to drive action from the target audience for that client. 

    “They turned things around within 48 hours, and they met all their deadlines.They're well-organized, and their account management is really good. They value a quick response, and their fast turnarounds were really helpful and important for us.”  Managing Director, Startup Accelerator

  • 23
    $10,000+
    10 - 49 Employees
    San Francisco CA

    Camp Creative is a digital marketing and branding agency headquartered in Berkeley, Calif., with another office in Bend, Ore. With a team of around 20, Camp Creative specializes in web design, graphic design, and UX/UI design.With Camp Creative's help, sales increased.

    Clients
    Cisco
    Google
    YouTube
    Bayer
    Industries
    Notable Project

    A fire alarm company hired Camp Creative to redesign their WordPress site. To help the client increase sales, Camp Creative provided assistance with the client's content strategy and SEO. The client appreciated that their key goal was met.

    "The way they balance creativity and data management is pretty impressive. It's rare to find a company with that balance." – Marketing Director, Fire Alarm Company

  • 24
    $5,000+
    2 - 9 Employees
    San Mateo CA

    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. 

    Clients
    HP
    Procter & Gamble
    Nike
    Industries
    Notable Project

    Cider developed a website platform that was easy for the business owner to use, but also ensured that it was responsive to users while providing all of the needs of the business. The client was happy with the level of service provided. 

    "I wasn't sure what platform I wanted to use but they made the process simple and we went with WordPress.” – Owner, Small Business

  • 25
    Undisclosed
    50 - 249 Employees
    San Francisco CA

    RNO1 is a digital design agency headquartered in California, with offices in Washington and Vancouver. Founded in 2007,  RNO1 has a team of less than 50 and specializes in UX/UI design, web design, web development, marketing strategy, branding, and SEO. 

    Clients
    Microsoft
    Airbnb
    Pet Paradise
    Clever Homes
    Industries
    Notable Project

    RNO1 worked with an architecture firm to establish a stronger, more contemporary online presence. RNO1 designed a custom template through Squarespace and updated the firm's website. The firm's founder appreciated the presentation and design of the new site. 

    "I liked the look and feel of the work, and I liked the presentation of the company, but most importantly, I liked the people with whom I was connected. That really connected the dots for me. I was not on a campaign to do a lot of interviewing. I hire people who I know can perform." – Founder, Toby Long Design 

  • 26
    $5,000+
    50 - 249 Employees
    San Francisco CA

    VironIT is an IT company based in Minsk, Belarus, with offices in London. Founded in 2004, their team of about 80 provides custom software development, web development, mobile app development, and IT strategy consulting services.

    Clients
    IntelliShopper
    Liswin
    FireNut
    WorkshopChat
    Notable Project

    VironIT assisted a consumer electronics firm with Java developement projects after thier in-house talent left the company. Since then, the client kept VironIT on board for all of its development projects, including a project involving a game engine which pushes data back and forth and synchronizes it with authority.

    "The response to VironIT's work has been increased sales and awareness as well as higher interest in the product." — President & CEO, Consumer Electronics Firm

  • 27
    $25,000+
    10 - 49 Employees
    Berkeley CA

    SpaceBus is a Magento development agency with two locations—one in Berkeley, Calif., and one in Dnipro, Ukraine. Since 2019, their team of 10+ employees provides Magento-based e-commerce development and web development to mid-market and enterprise-level clients.

    Clients
    Yamaha MusicSoft
    Whitecap
    Benefit Cosmetics
    Industries
    Notable Project

    SpaceBus assisted an industrial distribution company with the development of its B2B e-commerce website. Their work involved design and development, launch, support, and various integrations. They ultimately produced a 10% increase in conversions for the client, as well as other favorable results.

    "After the launch we got 60% Online Revenue Growth..." – IT Manager, Industrial Distribution Company

  • 28
    $1,000+
    10 - 49 Employees
    San Francisco CA

    Proleadsoft is a full-service digital agency headquartered in San Francisco, Calif. With a team of around 15 employees, Proleadsoft specializes in web development, SEO, and web design.With Proleadsoft's help, the youth nonprofit's website is modern, easy to navigate, and has attracted more traffic.

    Clients
    Incline Insurance
    Travel Merchants
    the DJ List
    Nofomo
    Notable Project

    A youth nonprofit hired Proleadsoft to build a new website that could be integrated with their social media accounts.

    "They held our hand each step of the way, working with us to write content and adding the appropriate photos and videos. Whenever we had questions, we were able to receive an immediate response either by phone call or email.." - CFO of Nonprofit

  • 29
    $50,000+
    10 - 49 Employees
    San Rafael CA

    A development company founded in 2005, Infinite Red, Inc. is based in Vancouver, Wash. Their team of fewer than 50 works in additional offices in San Rafael, Calif., servicing small to midmarket businesses. They offer web and mobile app development as well as web and UX/UI design services.

    Clients
    Microsoft
    Amazon
    SquareSpace
    BlueJeans
    Notable Project

    Infinite Red, Inc. developed a mobile app for an events company. The app is compatible with iOS and included several functionalities, including messaging and payment. The team’s deliverables have been largely successful and impressive to internal stakeholders.

    “I’ve been tracking the activity on the builds that they’ve delivered for me and have been pretty satisfied with the quality of work and the engagement we’re getting as a result of it.” — Founder, Events Platform

  • 30
    $5,000+
    10 - 49 Employees
    Berkeley CA

    Telos Labs is a digital agency based in Berkeley, Calif. with no more than 50 employees. Since their founding in 2017, they have offered web and mobile app development solutions to small and medium-sized businesses alike.

    Clients
    SaverLife
    Industries
    Notable Project

    Telos Labs provided development solutions for a savings app. The development of the app was met with significant hurdles, and Telos Labs helped to finish the process. Since the app’s launch, there have been little to no problems with it.

    “The fact that they are small, nimble, and easy to work with is one of the biggest assets that they provide.” - Founder, Savings App

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