Company lists · Data verified August 2026
Top 22 B2B data providers based in San Francisco, United States
There are 53 B2B data providers headquartered in San Francisco, United States (RevenueBase, August 2026). RevenueBase tracks 1,872 professional contacts across them, including 467 with verified work emails and 276 with mobile numbers. New York is the largest hub.
This list covers B2B data providers headquartered in San Francisco, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.
The 22 largest B2B data providers based in San Francisco, United States
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  apollo.io | 293 |
| 2 |  Databees | 9 |
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| 3 |  Leadiq | 34 |
| 4 |  Contactout | 43 |
| 5 |  Kat-I Research | 1 |
| 6 |  Kionin INC | 1 |
| 7 |  Throxy YC P25 | 9 |
| 8 | Leadspace | 14 |
| 9 |  Convex | 7 |
| 10 |  AI ARK | 4 |
| 11 |  Dealsignal | 6 |
| 12 |  Orbital | 10 |
| 13 |  Growbots | 9 |
| 14 |  Aeroleads | 3 |
| 15 |  Origami | 7 |
| 16 |  Primerole | 3 |
| 17 |  Sizeup | 4 |
| 18 |  Mattermark | 2 |
| 19 |  Arrakis | 3 |
| 20 |  Contora | 2 |
| 21 |  waterfall.io | 2 |
| 22 |  Momentera | 1 |
Showing 22 of 53 B2B data providers based in San Francisco, United States
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B2B data providers based in San Francisco, United States at a glance
As of Aug 28, 2026Companies by employee count
B2B data providers by metro in the United States
| Metro | Companies |
|---|---|
| B2B data providers in New York | 121 |
| B2B data providers in San Francisco | 53 |
| B2B data providers in Los Angeles | 37 |
| B2B data providers in Wilmington | 37 |
| B2B data providers in Sheridan | 31 |
| B2B data providers in Houston | 27 |
| B2B data providers in Dallas | 26 |
How this list was built
- Source
- The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
- Inclusion
- Companies whose own business descriptions match “B2B data providers”, with match quality audited by blind human judging, and headquartered in San Francisco, United States.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Contact records re-verify on a rolling cadence; 5 contacts on this list were re-verified in the last 30 days.
- Refresh
- Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.
Frequently asked
How many B2B data providers are there based in San Francisco, United States?
There are 53 B2B data providers headquartered in San Francisco, United States as of August 2026 (RevenueBase).
What is the largest company on this list?
apollo.io, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most B2B data providers?
New York leads with 121 headquartered companies, followed by San Francisco (53) and Los Angeles (37).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 467 verified decision-maker contacts tracked across these 53 companies.
How current is this list?
The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.
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About this data
RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.