Top 100 Software Development Companies in California
The Best of December 2025Looking 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
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$10,000+10 - 49 employeesIrvine, CAKingsmen Digital Ventures is a software development firm. Their small team is located in Irvine, California. The firm specializes in Custom Software Development, Mobile App Development, UX/UI Design, E-Commerce Development, and more.Read More
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$25,000+10 - 49 employeesMedina, WAFlower Press Interactive is a small user experience agency launched in 2001. Their team offers UX/UI Design, Mobile App Development, Custom Software Development, Web Development, and more. The company is located in Medina, Washington.Read More
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$10,000+10 - 49 employeesJohannesburg, South AfricaRead More
Mobile application development firm CubeZoo was established in 2011. In Johannesburg, South Africa and London, England, their small team specializes in Mobile App Development, Web Development, Artificial Intelligence, UX/UI Design, and more.
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691Undisclosed10,000+ 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
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692$5,000+50 - 249 employeesBirmingham, EnglandSoftware development firm eSquall LLC was established in 2017. The firm specializes in Custom Software Development and Web Development.Read More
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693$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.
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Momentum Design LabIndustries
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694$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
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Yuremane LLC Friends of the House LAIndustries
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695$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.
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Glomex SrlIndustries
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696$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
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697$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
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698$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
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699Undisclosed250 - 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
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700Undisclosed250 - 999 employeesSanta Clara, CAV2Solutions, a software development firm, was established in 2003. They provides Custom Software Development and IoT development.Read More
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701Undisclosed250 - 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
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702Undisclosed250 - 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
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703Undisclosed250 - 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
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704$1,000+Freelancer employeesSan Diego, CAOui Digital is a web design company based in San Diego, California. The small team focuses on Web Design, Web Development, Custom Software Development, and Content Marketing and was established in 2022.Read More
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705Undisclosed50 - 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
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706$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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707$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
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708$25,000+50 - 249 employeesWarszawa, PolandRead More
Aligned Code, a enterprise app modernization company, is located in Warszawa, Poland and Palo Alto, California. The midsize company was founded in 2013. Their services include enterprise app modernization, mobile app development, custom software development, web development, and more.
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PepsiCoIndustries
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709$5,000+Freelancer employeesDavis, CAFresh Web Agency is a web development company based in Davis, California. Established in 2021, the team focuses on Web Development and Custom Software Development.Read More
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Shopify Rebellion Boardroom Shopify Hommewrk -
710Undisclosed2 - 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
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711Undisclosed2 - 9 employeesWhittier, CAExpedite IO, a small custom software development firm, is in Whittier, California. The team specializes in Custom Software Development and IT managed services.Read More
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712Undisclosed250 - 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.
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713$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
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Google Microsoft PWC CompIQIndustries
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714$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
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715$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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716$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
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717$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
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718$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
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719$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
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Toshiba Disney City National Bank HondaIndustries
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720Undisclosed50 - 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
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UnileverIndustries
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