How many Technical SEO agencies are in California?

74 are listed on Agency List in California. 4 of them have been assessed on the Agency List Score as of September 2026, and 1 of those carry a published score.

Which Technical SEO agency in California is ranked highest?

MagFellow, with an Agency List Score of 77.8, ranks #1 of 4 assessed agencies in Technical SEO in California.

How is the ranking determined?

By Agency List Score, within the Technical SEO in California cohort of 4 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 Technical SEO Agencies in California, United States

Ranked · 1 of 4 assessed

Ordered by Agency List Score

#1 of 4 assessed

MagFellow

Verified

Global link building and multilingual SEO services

Content SEOEcommerce SEOInternational SEO

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Also in California · 73 not ranked here

70 have not yet been assessed on the Agency List Score. Alphabetical.

A Servant's Heart Web Design & MarketingView profile →Beez Marketing AgencyView profile →Best SEO WorldwideView profile →BeyondBrand.ioView profile →Birdie SEOView profile →BoomajoomView profile →Brand HouseView profile →Brooks Internet MarketingView profile →C3 Business SolutionsView profile →CabarettiView profile →California SEO ServicesView profile →Create Advertising GroupView profile →Curt Pringle & AssociatesView profile →DataSecView profile →Diffuse Digital MarketingView profile →Digital Storm SEOView profile →Dog And RoosterView profile →El Monte, CAView profile →Ezedim Digital MarketingView profile →First Day SocialView profile →FlashPoint MarketingView profile →FoamersView profile →Get Visible WebView profile →Hanhan InteractiveView profile →

About this ranking

What this page ranks

This page ranks 1 of the 4 assessed Technical SEO agencies in California — the ones carrying a published score — out of 74 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, Technical SEO in 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 4, so no award can be issued here.

The 70 Technical SEO agencies not yet assessed are listed on this page but not ranked.

A further 3 were assessed and no published evidence of their work was found, so no score is shown for them.

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 Technical SEO agencies are in California?: 74 are listed on Agency List in California. 4 of them have been assessed on the Agency List Score as of September 2026, and 1 of those carry a published score.
Which Technical SEO agency in California is ranked highest?: MagFellow, with an Agency List Score of 77.8, ranks #1 of 4 assessed agencies in Technical SEO in California.
Why are 73 Technical SEO agencies listed here but not ranked?: 70 of the 74 listed have not yet been assessed on the Agency List Score. A further 3 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 Technical SEO in California cohort of 4 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.