Ranked · 50 of 70 assessed
Ordered by Agency List ScoreIntegrity-driven SEO and web design services
SEO-focused real estate websites and lead generation services
SEO and digital marketing for AI and organic growth
SEO strategies for sustainable growth and search visibility
AI-driven SEO and digital transformation services
Custom web design and SEO for diverse industries
Local SEO and review management for online visibility
Digital marketing and SEO services in the San Francisco Bay Area
SEO and web design for law firms nationwide
SEO services with 18 years of experience and proven results
SEO, local search, and conversion-focused websites built for law firm case intake
Social media marketing across Facebook, Instagram, and LinkedIn
High-level SEO and local business marketing experts
Paid search and local SEO for home services, legal, dental, and ecommerce clients
SEO and online marketing for e-commerce and local businesses
SEO and PPC strategies for increased online profits
Local SEO and website design for enhanced online presence
SEO and PPC for Medical and Luxury Auto Industries
Ships fast mobile websites and crafts brand strategy
Boosts website traffic with SEO and internet marketing strategies.
Lead and PPC services for inbound lead capture and search visibility
Boosts Google rankings with local SEO and conversion optimization.
SEO, PPC, and website development for Sonoma County businesses since 1994
MarTech implementation and SEO built for companies planning rapid growth
Custom SEO and PPC Management for Higher Rankings
SEO and web design for manufacturing and industrial companies
SEO and digital thought leadership for global clients
SEO sprints for rapid organic growth and visibility
Global link building and multilingual SEO services
SEO services for plastic surgeons to increase patient leads
Web Design and Redundant Hosting for Construction Companies
International SEO and marketing for global brand growth
SEO and web design for targeted customer acquisition
SEO and content development for service-based companies
SEO and PPC services for inbound lead capture and search visibility
SEO and web design for organic growth and visibility
SEO network with global reach and dynamic strategies
Enhances online presence with SEO and digital marketing strategies.
Architecture and engineering for multi-site rollout programs
SEO, PPC, and web design for businesses of all sizes
In-house SEO, PPC, and reputation management built around tracked client acquisition systems
SEO and online marketing for eldercare businesses
SEO strategy, conversion-focused web design, and PPC management since 2004
Ecommerce SEO and Lead Generation with Advanced Analytics
SEO consulting, training, and strategy since 1998
Custom software, AI workflow automation, and SEO for Sacramento and nationwide clients
Exclusive SEO services and transparent reporting
SEO and web design for HVAC, solar, and window companies
SEO and PPC services for inbound lead capture and search visibility
Design and content services for inbound lead capture and search visibility
Also in California · 31 not ranked here
11 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 50 of the 70 assessed SEO agencies in California, United States — the ones carrying a published score — out of 81 listed.
The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.
Cohorts and awards
Agencies are compared within a cohort — here, SEO in California, United States. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 70, so the strongest award available here is top 5%.
The 11 SEO agencies not yet assessed are listed on this page but not ranked.
A further 20 were assessed and no published evidence of their work was found, so no score is shown for them.
Paid placement
Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.
Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.
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Services in California
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Questions
- How many SEO agencies are in California, United States?
- 81 are listed on Agency List in California, United States. 70 of them have been assessed on the Agency List Score as of October 2026, and 50 of those carry a published score.
- Which SEO agency in California, United States is ranked highest?
- Kova, with an Agency List Score of 97.9, ranks #1 of 70 assessed agencies in SEO in California, United States.
- Why are 31 SEO agencies listed here but not ranked?
- 11 of the 81 listed have not yet been assessed on the Agency List Score. A further 20 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
- How is the ranking determined?
- By Agency List Score, within the SEO in California, United States cohort of 70 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.