Top Software Development Companies in California
We ranked 15 software development companies in California on client reviews, how many are verified, service focus and profile completeness. Updated October 2026. How rankings work
Teams that design, build and maintain software, from web and mobile apps to the internal systems a business runs on.
- Rank 1
Irvine software consultancy building custom business applications such as CRMs, ERPs, portals and learning platforms with onshore engineers.
No reviews yet
Irvine, CA
- Custom Software Development
- Web Development
- AI & Automation
- Rank 2
Beverly Hills studio founded by MIT alumni that plans, designs and builds mobile and web apps for startups and enterprises.
No reviews yet
California
- Mobile App Development
- Web Development
- UX/UI Design
- Rank 3
Chicago custom software consultancy that helps organizations decide what to build, then designs and engineers it, including AI agents and platforms.
No reviews yet
Chicago, IL
- Custom Software Development
- AI & Automation
- Product Design & Development
- Team
- 100-249 people
- Rank 4
Los Angeles software agency building web and mobile apps and AI products with embedded senior teams for startups and enterprises.
No reviews yet
Los Angeles, CA
- Custom Software Development
- Mobile App Development
- AI & Automation
- Team
- 50-99 people
- Rank 5
Venice Beach mobile app studio building iOS and Android apps, with much of its work in healthcare, fintech, IoT and AI.
No reviews yet
Los Angeles, CA
- Mobile App Development
- AI & Automation
- UX/UI Design
- Rank 6
App and AI development agency with a Redmond office, building mobile apps and agentic AI products for mid-market and enterprise companies.
No reviews yet
New York, NY
- AI & Automation
- Mobile App Development
- Product Design & Development
- Team
- 100-249 people
- Rank 7
Los Angeles web development agency planning, designing and building Drupal and WordPress websites and web apps for mission-driven organizations.
No reviews yet
Los Angeles, CA
- Web Development
- UX/UI Design
- Rank 8
Los Angeles agency that researches, designs and develops web and mobile applications for startups and large enterprises.
No reviews yet
Los Angeles, CA
- Mobile App Development
- Web Development
- UX/UI Design
- Rank 9
Long Beach design and engineering studio building websites, custom web software, mobile and TV apps, and e-commerce for brands.
No reviews yet
Long Beach, CA
- Web Development
- Custom Software Development
- UX/UI Design
- Rank 10
Dallas AI consulting, design and engineering firm building AI solutions and digital experiences for regulated enterprises.
No reviews yet
Dallas, TX
- AI & Automation
- Product Design & Development
- Custom Software Development
- Rank 11Down 1 from #10
San Diego digital product agency that designs, builds and maintains web and mobile applications.
No reviews yet
San Diego, CA
- Product Design & Development
- Custom Software Development
- Mobile App Development
- Rank 12Down 1 from #11
Strategy, UX design and software development studio focused on healthcare and B2B products.
No reviews yet
Culver City, CA
- Product Design & Development
- Custom Software Development
- Mobile App Development
- Rank 13Down 1 from #12
Los Angeles design and technology studio creating websites, CMS platforms, digital products and apps for tech, cultural and academic clients.
No reviews yet
Los Angeles, CA
- Web Development
- UX/UI Design
- Product Design & Development
- Team
- 10-49 people
- Rank 14Down 1 from #13
Design and development studio for SaaS and B2B tech products: UI/UX, web apps, design systems and branding.
No reviews yet
San Francisco, CA
- UX/UI Design
- Product Design & Development
- Web Development
- Team
- 50-99 people
- Rank 15Down 1 from #14
UX design and branding agency that also builds websites and digital products, with frontend and backend developers.
No reviews yet
San Francisco, CA
- UX/UI Design
- Product Design & Development
- Web Development
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