Figure from the Q3 2026 edition · the current Index edition is Q4 2026 · see it here
48.2 vs 47.1
mean citation index, San Francisco companies vs all companies
A San Francisco address buys almost no AI visibility
Published by Parry Headrick · Updated Sep 7, 2026 · CC BY 4.0
The finding, verbatim
In the Crackle PR AI Visibility Index, Q3 2026 edition, the 45 San Francisco–headquartered companies averaged a 48.2 citation index against 47.1 for all 100 scored companies — a 1.1-point difference.
Location is one of the oldest proxies for technology credibility, and it is the one that survives least well under measurement. Crackle PR scored 45 San Francisco–headquartered companies and found their mean citation index effectively indistinguishable from the full panel.
The variable that did move the number was country. The 14 non-US-headquartered companies in the panel averaged 34.4 against 49.2 for US-headquartered companies — a 14.8-point gap, more than thirteen times the San Francisco effect.
For communications leaders outside the Bay Area, this is a budget argument. Relocating narrative gravity to San Francisco is not what closes the AI visibility gap; publishing structured, well-corroborated English-language material that answer engines can retrieve is.
Q3 2026 geography
| San Francisco–headquartered companies | 45 of 100 |
|---|---|
| Mean citation index, San Francisco | 48.2 |
| Mean citation index, all companies | 47.1 |
| California-headquartered companies | 64 of 100 |
| Mean citation index, US-headquartered | 49.2 |
| Mean citation index, non-US-headquartered | 34.4 |
| Boston / New York companies in panel | 3 / 9 |
“Answer engines cannot read a zip code. They read whether your claims are structured, dated, and corroborated somewhere other than your own site.”
How it was measured
Headquarters was taken from each company's own public filings or site at the time of scoring. Means are unweighted averages of the normalized 0–100 citation index inside each geographic subset of the same 100-company panel.
Denominator
The 100 companies in the Crackle PR Q3 2026 AI Visibility Index leaderboard.
What this number does not prove
Headquarters is a single-label simplification of distributed companies. The San Francisco subset is also large enough (n=45) to be pulled toward the panel mean by construction, so the finding is best read as 'no measurable premium', not 'a penalty'.
Cite this statistic
Reuse is permitted under CC BY 4.0 with attribution. The underlying data is public: raw CSV, JSON, and the DOI deposit.
Attribution line
Source: Crackle PR AI Visibility Index (https://www.cracklepr.com/ai-visibility-index), Q3 2026 edition, CC BY 4.0.Quotable sentence
In the Crackle PR AI Visibility Index, Q3 2026 edition, the 45 San Francisco–headquartered companies averaged a 48.2 citation index against 47.1 for all 100 scored companies — a 1.1-point difference.Embed (HTML)
<blockquote>In the Crackle PR AI Visibility Index, Q3 2026 edition, the 45 San Francisco–headquartered companies averaged a 48.2 citation index against 47.1 for all 100 scored companies — a 1.1-point difference. <cite><a href="https://www.cracklepr.com/stats/san-francisco-ai-visibility-premium">Crackle PR AI Visibility Index, Q3 2026</a></cite></blockquote>Academic citation (APA)
Crackle PR. (2026). Crackle PR AI Visibility Index (Q3 2026 edition) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21986226Full scoring rules, weights, and margin of error: Index methodology.
Go deeper
- →AI Visibility IndexThe full leaderboard, dataset, and quarterly editions.
- →Index methodologyQuery basket, scoring weights, and margin of error.
- →Publisher recusal policyWhy Crackle PR holds no rank in its own leaderboard.
- →B2B tech PR agencyHow Crackle PR runs earned media for technical buyers.
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