Top 100 Software Development Companies in California

Saritasa is a full-source software development firm based in Newport Beach, Calif. With additional offices in New York City, Russia, and Vietnam. They were founded in 2005 and employ a team of about 90 who provide custom software, web, mobile, IoT, and AR/VR development for mostly mid-sized businesses.

Azumo is a San Francisco based software development services company. They have additional offices in McKinney, Texas and Rosario, Argentina. They were founded in 2016, and specialize in custom software development, mobile app development, and the use of AI.

Diffco is a company of world-class senior developers in Mobile, Web, and AI to launch, accelerate, and support your business applications. 13+ years of experience and 1000+ successfully launched projects. We succor our customers to become market leaders.

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. 

Founded in 2001, Thinklogic is a development firm. Their small team is based in El Segundo, Calif. They focus on custom software, web, and mobile app development.

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.

Kingsmen Digital Ventures is a custom software development firm established in 2017. Their small team is based in Irvine, California and provides custom software development, ux/ui design, mobile app development, and web development.

Vincit California is a software development company that has provided mobile app development, custom software development, and UX/UI design services to their clients since 2007. Their team of 1,000 employees is based out of Irvine, Calif. With another office in Helsinki.

Custom software development firm Serious Development was founded in 2014. Their small team is based in Pasadena, California and Houston, Texas and focuses on custom software development, mobile app development, web development, web design, and more.

Founded in 2007, Theorem is a software development firm. The midsize team specializes in custom software development, ux/ui design, IoT development, IT strategy consulting, and more. The company is based in Los Angeles, California; Santa Monica, California; New York, New York and San Francisco, California.

The Smyth Group is a digital agency founded in San Diego in 2005. Their team of more than 10 specializes in UX/UI design, custom software development, and web development solutions for mid-market and enterprise-level clients.

Sidebench is a strategy, design, and development consultancy with a team of 70+ experts headquartered in Los Angeles. Founded in 2012, Sidebench caters to enterprise companies and new ventures seeking the management consultants & experienced founders, the technical chops of systems architects, and a UX-first approach. Sidebench provides app and web development, UX/UI design, web design, and app testing via a fully integrated product delivery team.

Admios Nearshore Software Development is an IT staff augmentation company. They are based in Panama City, Panama; San Francisco, California and San Luis, Chile and have a midsize team that specializes in IT staff augmentation, custom software development, e-commerce development, and IT managed services. The company was launched in 2005.

CodeNoise is a development team based in San Diego. They have a team of around 5 employees and were founded in 2011. They provide custom software, web, and mobile app development services.  

WebcentrIQ is a software development company in San Diego. Founded in 2017, they have about 10 employees that serve mostly midmarket and small-business clients in the healthcare, financial, and IT industries. Services include custom software development, mobile app development, and UI/UX design.

Dibutech is a software development firm. The midsize Concord, California-based team provides custom software development and web development. The firm was launched in 2018.

Digital Solutions is a Newport Beach, California-based user experience design agency. The small company was launched in 2016. Their team provides ux/ui design, custom software development, web development, mobile app development, and more.

Baytech Consulting is a software development company headquartered in Irvine, Calif., that was founded in 2007. The company has 8 people, and they mainly provide custom software development and web development services. 
 

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. 

CitrusBits is a mobile app development company based in Los Angeles, CA and founded in 2005. The team of nearly 60 employees is passionate about creating mobile technology and responsive mobile content for all businesses.

Located in Pasadena, Calif., Art + Logic is a development and design firm that was founded in 1991. The team of 85 work with a diverse set of clients on their custom software development, web development, web design, and mobile app development needs.

Mayven is a San Francisco based software design and development company. They were founded in 2015 and have a team of 25 employees. They specialize in web, custom software, and eCommerce development for enterprise and midmarket clients.

Galliot is a San Francisco-based software development firm founded in 2018. With an additional office in Montevideo, Uruguay, their 10-man-team develops products for midmarket and enterprise-level clients. While custom software and DevOps are their specialties, they also offer web development and cloud consulting.

ExpertsFromIndia is a development company based in San Jose, Calif. They were founded in 2003 and have a team of around 800 employees. They primarily provide custom software development and SEO. 

Established in 2001, JLOOP is a mobile application development firm. Their small team is based in Long Beach, California and , . Their team focuses on mobile app development, web development, and video production.

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. 

Expedition Co, is a software development company that was founded in 2017. The company is headquartered in Palos Verdes Estates, Calif. and is currently made up of 8 employees. They specialize in mobile app development, UX/UI design, and custom software development. 
 

Nearsure is a web development agency that has been offering web development, IT staff augmentation, and AI services to their clients since 2018. Their 50 employees are based out of Hollywood, Calif., as well as Costa Rica, Colombia, Venezuela, Bolivia, and Uruguay.

AE Studio is a team of designers, engineers, and data scientists based in Venice, CA – working on blockchain solutions internally and for partners since their founding in 2016. Their team of more than 150 members provides full, end-to-end blockchain services for startups and enterprise partners, ranging from strategic advisory to community/gtm to smart contract deployment. They are chain agnostic and partner with leading blockchain groups like Dapper Labs, Polygon, and Skale.

Rivka is a small IT staff augmentation company. They provide IT staff augmentation, custom software development, and mobile app development and were launched in 2011.