Company lists · Data refreshed September 2026
Top 25 Information security companies based in San Francisco, United States
RevenueBase identified 82 information security companies headquartered in San Francisco, United States as of September 2026 and tracks 4,124 professional contacts across them, including 479 with verified work emails. New York is the largest hub.
This list covers information security companies 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. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest information security companies based in San Francisco, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,566 | ||||
“We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 210 | ||||
“Vehere is an AI cybersecurity company operating at the intersection of national security and enterprise security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 27 | ||||
“Symmetry is the Data+AI Security Company.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 26 | ||||
“We specialize in Web Application and API penetration Testing, Cyber Threat Intelligence, and Detecting Account Takeovers (ATOs) from attackers.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 24 | ||||
“Actifile helps organizations automate their Data Discovery, Monitoring and Protection needs, addressing external data threats (like ransomware), insider threats (like shadow IT)…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 24 | ||||
“Sentant is a next-generation cybersecurity & IT services firm with a team of experienced technology professionals.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | TachtechIndirect evidence | 21 | |||
“TachTech is an engineering-first AI and Cybersecurity services firm headquartered in San Francisco and Washington, DC.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 19 | ||||
“Delivering durable outcomes for the most demanding enterprises.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 10 | ||||
“At Securisea, we are trusted and proven experts in compliance and security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | Metabase QIndirect evidence | 9 | |||
“Metabase Q offers an end-to-end platform that enables businesses to manage, measure and mature their cybersecurity.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 6 | ||||
“Humanize is an innovative and data-conscious company that transforms cybersecurity weaknesses to human readable quantified risks for C-Suite.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 5 | ||||
“We provide AI-powered, human-backed whitebox pentests for web apps & APIs that uncover critical vulns others miss.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | Startup DefenseIndirect evidence | 5 | |||
“Enterprise Cybersecurity Made Simple” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | Planet 9 INCIndirect evidence | 5 | |||
Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 4 | ||||
“Dogpatch Solutions is a leading IT consulting firm that specializes in cybersecurity assessments, migrations, networking and cloud computing solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 | ||||
“Blacksmith InfoSec helps small and medium businesses forge information security programs” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 | ||||
“909Cyber is a cybersecurity firm offering expert software sales, consulting and resourcing services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 | ||||
“With over two decades of experience in sensitive data management across hundreds of clients and installations, we at TekLeap understand the inherent weaknesses and threats in…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | ServadusIndirect evidence | 3 | |||
“Cybersecurity by Design, we help organizations with their cybersecurity and compliance programs through management and sustainability, consulting, and assessing.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 | ||||
“Our core values are to strive for excellence, act with integrity, and bring the best results to your business.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 | ||||
“Defend against cyber criminals with engaging security awareness and social engineering prevention videos, training, talks and penetration testing.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 | ||||
“Cobaltix Compliance provides risk assessments, creates policies and procedures, conducts vulnerability assessments and penetration testing, and performs vendor due diligence…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | PeacemakrPartial evidence | 2 | |||
“An early-stage startup that reimagines data-security for tech companies that service regulated verticals.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | Rubica, INCPartial evidence | 1 | |||
“Rubica exists to protect the "digital rights” of individuals and to empower people to take control of their security and privacy – and ultimately reduce the incidence of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 | ||||
“Since 2017, we've provided consulting and implementation of Devops and Computer Security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 82 information security companies based in San Francisco, United States
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Information security companies based in San Francisco, United States at a glance
As of Sep 3, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 82 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among information security companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in San Francisco, United States whose own description of what they do matches “information security companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among information security companies, and records with no verified work email. Companies headquartered outside San Francisco are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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
- Every listed company carries at least one verified work email, 479 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Information security companies by metro in the United States
- Information security companies in New York172
- Information security companies in Houston102
- Information security companies in Atlanta98
- Information security companies in Miami98
- Information security companies in Washington95
- Information security companies in Austin93
- Information security companies in Chicago90
- Information security companies in Dallas88
- Information security companies in San Francisco82
- Information security companies in Tampa74
- Information security companies in San Diego59
- Information security companies in Los Angeles57
- Information security companies in Arlington53
- Information security companies in Charlotte51
- Information security companies in Boston49
- Information security companies in Denver49
- Information security companies in Orlando48
- Information security companies in Columbia47
- Information security companies in San Antonio41
- Information security companies in Las Vegas40
- Information security companies in Phoenix37
- Information security companies in Seattle36
- Information security companies in Reston34
- Information security companies in Alexandria33
- Information security companies in Scottsdale32
- Information security companies in Baltimore29
- Information security companies in Fairfax29
- Information security companies in Raleigh29
- Information security companies in Sheridan29
- Information security companies in Huntsville28
- Information security companies in Mclean28
- Information security companies in Pittsburgh28
- Information security companies in San Jose28
- Information security companies in Wilmington28
- Information security companies in Ashburn25
- Information security companies in Columbus25
- Information security companies in Minneapolis25
Frequently asked
How many information security companies are there based in San Francisco, United States?
RevenueBase identified 82 information security companies headquartered in San Francisco, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Bugcrowd, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most information security companies?
New York leads with 172 headquartered companies, followed by Houston (102) and Atlanta (98).
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 479 verified decision-maker contacts tracked across these 82 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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