How many performance optimization agencies are in California?

74 are listed on Agency List in California. 1 of them has been assessed on the Agency List Score as of September 2026.

Which performance optimization agency in California is ranked highest?

Its On Media, with an Agency List Score of 72.6, ranks #1 of 1 assessed agency in Performance Optimization in California.

Why are 73 performance optimization agencies listed here but not ranked?

73 of the 74 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 Performance Optimization in California cohort of 1 assessed agency. 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 Performance Optimization Agencies in California, United States

Ranked · 1 assessed

Ordered by Agency List Score

#1 of 1 assessed

Its On Media

Verified

Web and mobile app development with digital marketing expertise

Accessibility RemediationAPI and Systems IntegrationBackend Development

View profile

Also in California · 73 not yet assessed

Listed agencies queued for assessment. Alphabetical.

ActiveLAMPView profile →AviamediaView profile →Babysteps WebView profile →Blaster Web ServicesView profile →Brand HouseView profile →BSideStudiosView profile →DAPDView profile →Daya WebView profile →Destined DesignView profile →DhaliView profile →DigiSavvyView profile →Dream Warrior GroupView profile →ESP Computer ConsultingView profile →ESP InspireView profile →ExpeditionView profile →ExtimaView profile →Frogmouth DigitalView profile →Gobro Web ServicesView profile →GoldenCommView profile →Goldlilys MediaView profile →Hook 42View profile →HubBaseView profile →HyperArtsView profile →I2netView profile →

About this ranking

What this page ranks

This page ranks the 1 performance optimization agency in California that has been assessed on the Agency List 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, Performance Optimization 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 1, so no award can be issued here.

The 73 performance optimization 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 performance optimization agencies are in California?: 74 are listed on Agency List in California. 1 of them has been assessed on the Agency List Score as of September 2026.
Which performance optimization agency in California is ranked highest?: Its On Media, with an Agency List Score of 72.6, ranks #1 of 1 assessed agency in Performance Optimization in California.
Why are 73 performance optimization agencies listed here but not ranked?: 73 of the 74 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 Performance Optimization in California cohort of 1 assessed agency. 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.