How many SEO agencies are in San Francisco, California?

42 are listed on Agency List in San Francisco, California. 2 of them have been assessed on the Agency List Score as of September 2026.

Which SEO agency in San Francisco, California is ranked highest?

Brimar Online Marketing, with an Agency List Score of 94.2, ranks #1 of 2 assessed agencies in SEO in San Francisco, California.

Why are 40 SEO agencies listed here but not ranked?

40 of the 42 listed have not yet been assessed on the Agency List Score. 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 San Francisco, California cohort of 2 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.

Top SEO Agencies in San Francisco, California

Ranked · 2 assessed

Ordered by Agency List Score

#1 of 2 assessed

Brimar Online Marketing

Verified

Web design, SEO, and PPC for client conversion

Email MarketingLanding PagesLead Generation

View profile

#2 of 2 assessed

Proleadsoft

Verified

iOS, Android, and web development paired with SEO and cloud migration

Analytics & ReportingSearch Engine OptimizationWebsite Optimization

View profile

Also in San Francisco · 40 not yet assessed

Listed agencies queued for assessment. Alphabetical.

46MileView profile →AdliftView profile →Agence publicité / communication / 360View profile →Alchemist MediaView profile →AllewebinfoView profile →Bartlett BrandsView profile →California SEO ProfessionalsView profile →CircleclickView profile →ConquermarkView profile →CoseomView profile →Cutwater AgencyView profile →Espresso B2B MarketingView profile →Evviva BrandsView profile →Four15 DigitalView profile →HighwireView profile →HUb Strategy and CommunicationView profile →Hutner Descollonges, San FranciscoView profile →LeapUp Marketing SolutionsView profile →Linear SCView profile →ManualView profile →Meadow DesignView profile →MotavaView profile →OpolloView profile →Pier2 MarketingView profile →

About this ranking

What this page ranks

This page ranks the 2 SEO agencies in San Francisco, California that have been assessed on the Agency List Score, out of 42 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 San Francisco, California. 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 2, so no award can be issued here.

The 40 SEO agencies not yet assessed are listed on this page but not ranked.

Read the full methodology

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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Questions

How many SEO agencies are in San Francisco, California?: 42 are listed on Agency List in San Francisco, California. 2 of them have been assessed on the Agency List Score as of September 2026.
Which SEO agency in San Francisco, California is ranked highest?: Brimar Online Marketing, with an Agency List Score of 94.2, ranks #1 of 2 assessed agencies in SEO in San Francisco, California.
Why are 40 SEO agencies listed here but not ranked?: 40 of the 42 listed have not yet been assessed on the Agency List Score. 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 San Francisco, California cohort of 2 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.