Top Web Development Companies in California
We ranked 28 web development companies in California on client reviews, how many are verified, service focus and profile completeness. Updated October 2026. How rankings work
Teams that build websites, web applications, portals and e-commerce platforms.
- Rank 1
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 2
San Jose agency that designs and builds enterprise websites and CMS platforms for B2B technology and other complex companies.
No reviews yet
San Jose, CA
- Web Development
- UX/UI Design
- API & Integration Development
- Rank 3
Oakland agency that researches, designs, builds and supports Drupal and WordPress websites for nonprofits, universities and public agencies.
No reviews yet
Oakland, CA
- Web Development
- UX/UI Design
- Rank 4
Downtown San Jose agency that designs and develops websites for B2B technology companies and startups in Silicon Valley.
No reviews yet
San Jose, CA
- Web Development
- UX/UI Design
- Rank 5
Long-running San Diego web agency that designs, builds and maintains websites, web apps and mobile apps for businesses and institutions.
No reviews yet
San Diego, CA
- Web Development
- UX/UI Design
- Mobile App Development
- Team
- 10-49 people
- Rank 6
San Francisco agency that builds and maintains custom web apps, mobile apps and APIs for companies from startups to large enterprises.
No reviews yet
San Francisco, CA
- Web Development
- API & Integration Development
- Mobile App Development
- Team
- 10-49 people
- Rank 7
San Francisco studio that designs and builds interactive data visualizations, digital maps and data platforms for public and private clients.
No reviews yet
San Francisco, CA
- Web Development
- Custom Software Development
- UX/UI Design
- Rank 8
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 9
San Diego digital agency building websites, patient and citizen portals, custom apps and CMS platforms for healthcare and public-sector organizations.
No reviews yet
San Diego, CA
- Web Development
- Custom Software Development
- UX/UI Design
- Rank 10
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 11
San Diego software studio delivering fixed-price web apps, mobile apps, MVPs and business automation in 4 to 16 weeks.
No reviews yet
San Diego, CA
- Custom Software Development
- Web Development
- Mobile App Development
- Projects from
- $15,000+
- Team
- 50-99 people
- Rank 12
San Francisco studio that plans, designs, builds and tests web and mobile apps, with AI features, for Bay Area startups and larger brands.
No reviews yet
San Francisco, CA
- Mobile App Development
- Web Development
- AI & Automation
- Team
- 50-99 people
- Rank 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 14
San Francisco UI/UX design and development firm that builds data-heavy B2B SaaS products, design systems and AI features.
No reviews yet
San Francisco, CA
- UX/UI Design
- Web Development
- AI & Automation
- Rank 15
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 16
Small San Francisco product team that builds, modernizes and secures software for startups and large enterprises, with design and DevOps included.
No reviews yet
San Francisco, CA
- Custom Software Development
- Product Design & Development
- Web Development
- Team
- 1-9 people
- Rank 17
San Diego team of software engineers and architects building custom web, mobile, e-commerce and integration projects.
No reviews yet
San Diego, CA
- Custom Software Development
- Web Development
- API & Integration Development
- Team
- 10-49 people
- Rank 18
San Francisco product agency that designs and engineers native and React Native mobile apps and web products for brands and startups.
No reviews yet
San Francisco, CA
- Mobile App Development
- Web Development
- UX/UI Design
- Rank 19
San Diego custom software developer building mobile, web, desktop and enterprise applications since 1990.
No reviews yet
San Diego, CA
- Custom Software Development
- Mobile App Development
- Web Development
- Rank 20
Beverly Hills studio founded by MIT alumni that plans, designs and builds mobile and web apps for startups and enterprises.
No reviews yet
Beverly Hills, CA
- Mobile App Development
- Web Development
- UX/UI Design
- Rank 21
Solana Beach software design and development firm building web, mobile and LLM-based products with California and Mexico teams.
No reviews yet
Solana Beach, CA
- Custom Software Development
- Product Design & Development
- Mobile App Development
- Rank 22
San Jose software company that builds AI systems, agents and custom web, mobile and SaaS products for startups and enterprises.
No reviews yet
San Jose, CA
- Custom Software Development
- AI & Automation
- Mobile App Development
- Rank 23
San Diego mobile app studio building iOS and Android apps and patient management software for clinics and health startups.
No reviews yet
San Diego, CA
- Mobile App Development
- Custom Software Development
- Web Development
- Rank 24
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
- Rank 25
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
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