Clay is a US-based UI/UX design agency focused on high-end digital product design and UX/UI—from research and wireframes to polished UI and design systems.
Top Rated10+ YearsMid-Size
UI/UX DesignBranding & Creative DesignTOP 10 LIST•2026
Top 10 UI/UX Design Agencies in California (2026)
The best ui/ux design agencies in California, curated by AgencyCluster.
10 verified agencies
17+ years avg. experience
Updated
The Top 10
The absolute best in ui/ux design
IDEO is a US-based UI/UX design agency focused on human-centered design, service design, and digital experiences—from research and wireframes to polished UI and
Top Rated15+ YearsEnterprise
UI/UX Design
Work & Co is a US-based UI/UX design agency focused on digital product design and user experience for apps and platforms—from research and wireframes to polishe
Top Rated10+ YearsEnterprise
UI/UX Design
Neuron is a US-based UI/UX design agency focused on research-led UX strategy and product design—from research and wireframes to polished UI and design systems.
Top Rated10+ YearsSmall Team
UI/UX Design
Punchcut is a US-based UI/UX design agency focused on product innovation and UX/UI for emerging tech—from research and wireframes to polished UI and design syst
Top Rated15+ YearsMid-Size
UI/UX Design
fuseproject is a US-based UI/UX design agency focused on product and experience design with strong UI craft—from research and wireframes to polished UI and desi
Top Rated15+ YearsSmall Team
UI/UX Design
UXReactor is a US-based UI/UX design agency focused on UX strategy and UI design for enterprise platforms—from research and wireframes to polished UI and design
Top Rated10+ YearsSmall Team
UI/UX Design
Bureau of Small Projects is a US-based UI/UX design agency focused on UX-centered website and product design for growing businesses—from research and wireframes
Rising Star10+ YearsBoutique
UI/UX Design
La Visual is a US-based UI/UX design agency focused on brand + digital product UI/UX design—from research and wireframes to polished UI and design systems.
Rising Star15+ YearsSmall Team
UI/UX Design
Momentum Design is an award-winning global product design agency specializing in human-centric customer experiences across digital product innovation, transformative business processes, and inventive marketing.
Rising Star5+ YearsSmall Team
UI/UX DesignTop 10 UI/UX Design Agencies — FAQ
Common questions about the best ui/ux design agencies in California.
Who is the #1 ui/ux design agency in California in 2026?
As of 2026, the top-ranked ui/ux design agency in California on AgencyCluster is Clay, with an AgencyCluster Score of 98/100. Rankings are based on verified evidence across credibility, proof of work, reputation, category specialization, delivery maturity, and freshness. Rankings are updated periodically as new evidence becomes available.
How were the top 10 ui/ux design agencies in California selected?
This list features 10 agencies selected from AgencyCluster's curated directory. Each agency was evaluated using the AgencyCluster Score (0–100), with particular weight on demonstrated expertise in ui/ux design. Only agencies with verified credentials are eligible, and rankings cannot be purchased. The agencies on this list average 17+ years of experience. For full methodology details, see our How We Rank page.
What should I look for when choosing a ui/ux design agency from this list?
Review their case studies for evidence of user research — not just final visual designs. Ask about their research methods (interviews, usability testing, analytics review). Check whether they deliver design systems or just individual screens. For enterprise products, ask about their experience with complex workflows, data-dense interfaces, and design-to-dev handoff.
How much do the top ui/ux design agencies typically charge?
A product design engagement (research through visual design) typically costs $25K–$150K. Design system creation ranges from $40K–$120K. Ongoing design retainers for product teams run $8K–$25K/month.
Trusted Rankings
Every agency on this list has been reviewed by our editorial team. Rankings are based on our transparent methodology which evaluates credibility, outcomes, and reputation.
No paid rankingsVerified credentialsUpdated regularly
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