Company lists · Data refreshed September 2026

Top 25 Cybersecurity assessment services based in San Francisco, United States

Name: Cybersecurity assessment services based in San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 80 companies tracked

RevenueBase identified 80 cybersecurity assessment services headquartered in San Francisco, United States as of September 2026 and tracks 8,140 professional contacts across them, including 1,483 with verified work emails. New York is the largest hub.

This list covers cybersecurity assessment services 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 21, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

80Companies

8,140Contacts tracked

1,483Verified emails

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The 25 largest cybersecurity assessment services based in San Francisco, United States

Ranked by team size

Top 25 of 80 cybersecurity assessment services based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity assessment services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Hackerone	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	n/a	6,058 contacts →
	Indirect evidence “HackerOne is a global leader in Continuous Threat Exposure Management (CTEM) and the only solution provider that pairs the simultaneous trust of the Fortune 500 and the world's…” Source: RevenueBase Database · checked Sep 21, 2026
2	Nozomi Networks	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	375 contacts →
	Indirect evidence “We protect the world’s critical infrastructure from cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
3	horizon3.ai	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	364 contacts →
	Partial evidence “Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up?” Source: RevenueBase Database · checked Sep 21, 2026
4	Cobalt	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	350 contacts →
	Indirect evidence “Cobalt is the pioneer in pentesting as a service and a leader in offensive security services.” Source: RevenueBase Database · checked Sep 21, 2026
5	Securitypal AI	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	263 contacts →
	Partial evidence “SecurityPal is a Cybersecurity Assurance Management Platform that blends AI-powered automation with expert oversight to help organizations accelerate trust, reduce friction, and…” Source: RevenueBase Database · checked Sep 21, 2026
6	TAC Security	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	208 contacts →
	Partial evidence “TAC Security (NSE: TAC) TAC Security, a leading publicly listed global cybersecurity company specializing in vulnerability management, today serves clients across 100 countries…” Source: RevenueBase Database · checked Sep 21, 2026
7	Fluid Attacks	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	167 contacts →
	Indirect evidence “Fluid Attacks helps companies prevent, detect, manage and remediate vulnerabilities across their application attack surface.” Source: RevenueBase Database · checked Sep 21, 2026
8	Escape	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “Escape automates the full offensive security lifecycle, multiplying the impact of every security engineer tenfold.” Source: RevenueBase Database · checked Sep 21, 2026
9	Seworks	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	27 contacts →
	Indirect evidence “We specialize in Web Application and API penetration Testing, Cyber Threat Intelligence, and Detecting Account Takeovers (ATOs) from attackers.” Source: RevenueBase Database · checked Sep 21, 2026
10	Sentant	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “Sentant is a next-generation cybersecurity & IT services firm with a team of experienced technology professionals.” Source: RevenueBase Database · checked Sep 21, 2026
11	Epiccyber	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Partial evidence “EpicCyber: Empowering Your Business with Zscaler, Crowd strike, and Okta Cybersecurity Solutions” Source: RevenueBase Database · checked Sep 21, 2026
12	Ysecurity	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Partial evidence “We are a team of cybersecurity operators from Silicon Valley.” Source: RevenueBase Database · checked Sep 21, 2026
13	Truvantis, INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “Truvantis is a security, privacy and compliance consulting firm providing best-in-class services to secure your organization's infrastructure, data, operations and products.” Source: RevenueBase Database · checked Sep 21, 2026
14	Securisea	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “At Securisea, we are trusted and proven experts in compliance and security.” Source: RevenueBase Database · checked Sep 21, 2026
15	Metabase Q	Partial evidence	San Francisco, United StatesHQ checked Sep 21, 2026	51-200	9 contacts →
	Partial evidence “Metabase Q offers an end-to-end platform that enables businesses to manage, measure and mature their cybersecurity.” Source: RevenueBase Database · checked Sep 21, 2026
16	Humanize, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial 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 21, 2026
17	Specular	Partial evidence	San Francisco, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “We believe that recent advancements in Large Language Models (LLMs) present a unique opportunity to automate or heavily augment the identification, assessment, and remediation of…” Source: RevenueBase Database · checked Sep 21, 2026
18	Harmony Intelligence	Indirect evidence	San Francisco, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “We make it easy to catch critical vulnerabilities in your web app or API so you don't wake up to a bad breach.” Source: RevenueBase Database · checked Sep 21, 2026
19	909cyber	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “Fraud doesn’t break in.” Source: RevenueBase Database · checked Sep 21, 2026
20	Dogpatch Solutions INC	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Strong evidence “Dogpatch Solutions is a leading IT consulting firm that specializes in cybersecurity assessments, migrations, networking and cloud computing solutions.” Source: RevenueBase Database · checked Sep 21, 2026
21	Cyberse	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	4 contacts →
	Partial evidence “The Cybersecurity Marketplace and community.” Source: RevenueBase Database · checked Sep 21, 2026
22	Xivx Risk & Threat Intelligence	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial 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 21, 2026
23	Tekleap	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	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 21, 2026
24	Servadus	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial 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 21, 2026
25	Securenexa	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial evidence “SecureNexa is a global cybersecurity partner for small and mid-sized businesses.” Source: RevenueBase Database · checked Sep 21, 2026

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: cybersecurity assessment services. 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 cybersecurity assessment services.
Partial evidence: Its own public description names part of cybersecurity assessment services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity assessment services. 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 25 of 80 cybersecurity assessment services based in San Francisco, United States

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Cybersecurity assessment services based in San Francisco, United States at a glance

As of Sep 21, 2026

18.2%Verified-email coverage

101.8Average contacts per company

1-10Median size (employees)

195.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 80 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 cybersecurity assessment services, 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 “cybersecurity assessment services”. 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 cybersecurity assessment services), 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 cybersecurity assessment services, 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, 1,483 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 21, 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.

Cybersecurity assessment services by metro in the United States

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 cybersecurity assessment services, 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 cybersecurity assessment services are there based in San Francisco, United States?

RevenueBase identified 80 cybersecurity assessment services 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?

Hackerone, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most cybersecurity assessment services?

New York leads with 156 headquartered companies, followed by Atlanta (108) and Austin (101).

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 1,483 verified decision-maker contacts tracked across these 80 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 21, 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.