Top 100 Software Development Companies in California
The Best of October 2026Looking for a top software developer in California?
As the use of mobile and web apps rise, your business’s digital presence becomes even more important. The biggest challenge facing organizations is how they can keep up in the digital world. The best way is to continuously develop up-to-date software that allows your organization to maintain an impactful digital presence.
To assist you in your search for a partner, we’ve compiled this list of the top software development companies in California. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best California Software Developers
-
781Undisclosed10,000+ employeesSan Francisco, CAFounded in 1993, Thoughtworks Software Technologies Ltd is a large Chicago, Illinois-based AI company. Their team offers Artificial Intelligence and IT managed services.Read More
Industries
-
782$1,000+Freelancer employeesSan Mateo, CARead More
GCX Solutions is a product development firm headquartered in San Mateo, CA. Founded, in 2018, their team of approximately 1–2 employees mostly serves small clients and some mid-sized businesses. Within the scope of product development, their specialties include custom software and UX/UI design.
Clients
Momentum Design LabIndustries
-
783$50,000+10 - 49 employeesSunnyvale, CARead More
Iomico, an IoT development company, is in Warszawa, Poland; Sunnyvale, California; Edmonds, Washington and Buenos Aires, Argentina. The small team provides IoT development, Product Design, Custom Software Development, and Mobile App Development. The agency was established in 2012.
Clients
Glomex SrlIndustries
-
784$10,000+50 - 249 employeesSacramento, CATaction Software LLC is a Chicago, Illinois-based custom software development firm. Established in 2013, the midsize team focuses on Custom Software Development, Mobile App Development, Artificial Intelligence, and Web Development.Read More
Clients
First National BankIndustries
-
785$1,000+2 - 9 employeesSacramento, CAVerdugo Web Services is a web design company. Founded in 2024, the agency is headquartered in Sacramento, California. The small team focuses on Web Design, Web Development, E-Commerce Development, Custom Software Development, and more.Read More
Clients
Yuremane LLC Friends of the House LAIndustries
-
786$5,000+250 - 999 employeesNewport Beach, CADynTek is a midsize Newport Beach, California-based IT strategy consulting company. Their services include IT strategy consulting and Custom Software Development.Read More
Industries
-
787$10,000+250 - 999 employeesLos Angeles, CAAdvertising company Psyop is in New York, New York and Los Angeles, California. Their services include Advertising and Video Production.Read More
-
788Undisclosed250 - 999 employeesWalnut Creek, CAMidsize custom software development firm Trueforce, Inc., is in Walnut Creek, California. The team specializes in Custom Software Development and Artificial Intelligence.Read More
-
789Undisclosed250 - 999 employeesSanta Clara, CAV2Solutions, a software development firm, was established in 2003. They provides Custom Software Development and IoT development.Read More
-
790Undisclosed250 - 999 employeesCulver City, CACustom software development firm Test Pro is located in Culver City, California. The team specializes in Custom Software Development and Application Testing.Read More
-
791Undisclosed250 - 999 employeesSanta Clara, CAEffOne is a custom software development firm based in Santa Clara, California. They focus on Custom Software Development and Application Testing.Read More
-
792Undisclosed250 - 999 employeesSan Francisco, CATRON DAO, a midsize Blockchain company, is based in San Francisco, California. Their services include Blockchain and Custom Software Development.Read More
-
793Undisclosed50 - 249 employeesOrange, CASQA² is an Application Testing company launched in 1997. The team offers Application Testing and IT strategy consulting and is in Orange, California.Read More
-
794$1,000+2 - 9 employeesSan Francisco, CAPiwot is a branding company established in 2025. Located in San Francisco, California, their small team provides Branding, Web Design, Graphic Design, Custom Software Development, and more.Read More
Industries
-
795$1,000+10 - 49 employeesGlendale, CAWeb design agency Shiftr Agency is located in Glendale, California. The small agency was established in 2022. Their services include Web Design, UX/UI Design, Custom Software Development, Web Development, and more.Read More
Industries
-
796$5,000+Freelancer employeesDavis, CAOneup View is a small Davis, California-based website development company. The team provides Web Development and Custom Software Development.Read More
Clients
Shopify Rebellion Boardroom Shopify Hommewrk -
797Undisclosed2 - 9 employeesSunnyvale, CAOxygen AI is a Sunnyvale, California-based Business Consulting company. They focus on Business Consulting and Custom Software Development and were founded in 2017.Read More
-
798$10,000+50 - 249 employeesIrvine, CACodup is a custom software development company. The midsize team is located in Houston, Texas; Dubai, United Arab Emirates and Irvine, California. Their services include Custom Software Development, E-Commerce Development, Enterprise App Modernization, Mobile App Development, and more.Read More
Clients
UnileverIndustries
-
799$25,000+10 - 49 employeesLos Angeles, CARead More
Established in 2013, Jafton is a mobile app development company. The small team offers Mobile App Development, Custom Software Development, and Artificial Intelligence. The agency is in New York, New York; Miami, Florida; Los Angeles, California and Austin, Texas.
Clients
SheinIndustries
-
800Undisclosed250 - 999 employeesSan Francisco, CARead More
Human resources company Gusto was established in 2011. They are in San Francisco, California and have a midsize team. Their services include HR services and custom software development.
-
801$1,000+10 - 49 employeesIrvine, CACharisol Technology is a website development firm founded in 2015. The company focuses on Web Development and Mobile App Development, and is small.Read More
Industries
-
802$25,000+250 - 999 employeesSan Francisco, CAHelpware Tech is a midsize San Francisco, California-based IT strategy consulting company. They provide IT strategy consulting, IT staff augmentation, Custom Software Development, Web Development, and more and were founded in 2015.Read More
Clients
Google Microsoft PWC CompIQIndustries
-
803$10,000+2 - 9 employeesLa Habra, CAUniversal Informatics LLC, a web development company, was founded in 2024. They are based in La Habra, California and have a small team. Their services include web development, mobile app development, api development, microservices architecture services, and more.Read More
-
804$5,000+10 - 49 employeesSacramento, CASmall mobile app development company TechloSet, is located in Faisalabad, Pakistan and Sacramento, California. Their services include Mobile App Development and Custom Software Development.Read More
Clients
13Industries
-
805$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
Clients
US NewsIndustries
-
806$10,000+50 - 249 employeesSan Mateo, CAIn San Mateo, California and Nanakramguda, India, Altir is a custom software development firm. The midsize company was launched in 2020. Their services include Custom Software Development, UX/UI Design, Artificial Intelligence, AI Consulting, and more.Read More
Industries
-
807$10,000+50 - 249 employeesFullerton, CAFounded in 2009, Pegasus One is a business intelligence company. The firm offers BI & big data consulting & SI, cloud consulting & SI, Custom Software Development, Mobile App Development, and more and has a midsize team. The firm is located in Fullerton, California and Mumbai, India.Read More
Clients
Toshiba Disney City National Bank HondaIndustries
-
808$1,000+2 - 9 employeesLaguna Beach, CAThink GenC is a Denpasar, Indonesia-based web development company. They specialize in Web Development, Web Design, UX/UI Design, Graphic Design, and more and were established in 2022.Read More
Industries
-
809$5,000+50 - 249 employeesHuntington Beach, CAAmbsan Digital is a mobile application development company launched in 2025. Their midsize team is based in Huntington Beach, California; Mississauga, Canada and Karachi, Pakistan and offers Mobile App Development, Custom Software Development, IT staff augmentation, UX/UI Design, and more.Read More
Industries
-
810Undisclosed50 - 249 employeesSanta Clara, CAThe X Future Inc is a software development company located in Santa Clara, California and Mumbai, India. The team focuses on Custom Software Development and Mobile App Development.Read More
Clients
UnileverIndustries
Featured provider
Get connected with a company for free
Tell us about your project, and we'll match you with vetted companies that meet your requirements.
Get connected with the right company for you
We'll do the work for you – finding and connecting you with service providers that meet your exact requirements.
Schedule ConsultationMost Reviewed Software Developers in California
Check out a Software Developers in California with the most new reviews in the past 12 months.
Software Developers
California
- 11 8 new reviews
- 12 7 new reviews
- 13 7 new reviews
- 14 6 new reviews
- 15 6 new reviews
