Company lists · Data refreshed September 2026
Top 10 Security incident response firms based in San Francisco, United States
RevenueBase identified 32 security incident response firms headquartered in San Francisco, United States as of September 2026 and tracks 96 professional contacts across them, including 22 with verified work emails. Across the United States, New York is the largest hub for this category (70 companies); San Francisco has 32.
This list covers security incident response firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 10 largest security incident response firms based in San Francisco, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 24 contacts → | ||||
Indirect evidence “Sentant is a next-generation cybersecurity & IT services firm with a team of experienced technology professionals.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6 contacts → | ||||
Indirect evidence “Humanize is an innovative and data-conscious company that transforms cybersecurity weaknesses to human readable quantified risks for C-Suite.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 4 contacts → | ||||
Partial evidence “Security Operations Center • Litigation Support • Forensic Lab Email: usdnlab@usdn.net Global Toll Free: 866.930.4312 Non-Emergency: PGP Key: usdnlab@usdn.net -BEGIN PGP PUBLIC…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 4 contacts → | ||||
Indirect evidence “At XIVX Risk & Threat Intelligence, we help groups minimize risk, understand threats, and achieve compliance the right way: through functional and effective cybersecurity.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 3 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 3 contacts → | ||||
Indirect evidence “Cybersecurity by Design, we help organizations with their cybersecurity and compliance programs through management and sustainability, consulting, and assessing.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3 contacts → | ||||
Indirect evidence “SecureNexa is a global cybersecurity partner for small and mid-sized businesses.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 2 contacts → | ||||
Partial evidence “Leveraging decades of experience in public and private sector security management, Pacific Resilience Group delivers industry-leading expertise in insider risk, workplace violence…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1 contacts → | ||||
Partial evidence “Asymmetric is a security advisory firm headquartered in San Francisco, serving clients nationwide.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1 contacts → | ||||
Indirect evidence “D3 Networks specializes in meeting the information technology and cybersecurity needs of firms in the financial industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: security incident response firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names security incident response firms.
- Partial evidence
- Its own public description names part of security incident response firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security incident response firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 10 of 32 security incident response firms based in San Francisco, United States
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Security incident response firms based in San Francisco, United States at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 32 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 security incident response firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “security incident response firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names security incident response firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among security incident response firms, 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 its RevenueBase Smart Search 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, 22 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 29, 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.
Security incident response firms by metro in the United States
- Security incident response firms in New York70
- Security incident response firms in Chicago48
- Security incident response firms in Miami48
- Security incident response firms in Houston46
- Security incident response firms in Atlanta45
- Security incident response firms in Washington44
- Security incident response firms in Dallas39
- Security incident response firms in Austin38
- Security incident response firms in Los Angeles30
- Security incident response firms in Tampa30
- Security incident response firms in San Diego26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names security incident response firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many security incident response firms are there based in San Francisco, United States?
RevenueBase identified 32 security incident response firms 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?
Sentant, headquartered in San Francisco, tops this list with the largest team on record.
Which city in the United States has the most security incident response firms?
New York leads the United States with 70 headquartered companies, followed by Chicago (48) and Miami (48). San Francisco has 32.
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 22 verified decision-maker contacts tracked across these 32 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 29, 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 Smart Search, 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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