Company lists · Data refreshed September 2026

Top 25 Cloud threat detection and response services based in San Francisco, United States

RevenueBase identified 67 cloud threat detection and response services headquartered in San Francisco, United States as of September 2026 and tracks 1,899 professional contacts across them, including 983 with verified work emails. Across the United States, New York is the largest hub for this category (109 companies); San Francisco follows with 67.

This list covers cloud threat detection and response 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 27, 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 27, 2026 86% judged on-target in blind review
67Companies
1,899Contacts tracked
983Verified emails
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The 25 largest cloud threat detection and response services based in San Francisco, United States

Ranked by team size
Top 25 of 67 cloud threat detection and response services based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to cloud threat detection and response 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 2026501-1,000659 contacts →

Indirect evidence

“Good-enough security isn’t good enough.”

Source: RevenueBase Database · checked Sep 27, 2026
2Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 2026201-500336 contacts →

Partial evidence

“Upwind Cloud Security Platform bridges intelligence from runtime to build-time, eliminating friction & boosting the productivity of your developers, security engineers, and DevOps.”

Source: RevenueBase Database · checked Sep 27, 2026
3Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-200208 contacts →

Indirect 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 27, 2026
4Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-50145 contacts →

Indirect evidence

“Relyance AI maps every path AI and identities take to your sensitive data, then enforces safety and cuts the paths that shouldn't exist.”

Source: RevenueBase Database · checked Sep 27, 2026
5Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-20086 contacts →

Strong evidence

“Material Security is an automated detection and response toolkit for Google Workspace and Microsoft 365, combining email security, data security, identity protection, and…”

Source: RevenueBase Database · checked Sep 27, 2026
6Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-20054 contacts →

Indirect evidence

“AI is being run everywhere, by humans and agents.”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-20053 contacts →

Indirect evidence

“Cloudmark was acquired by Proofpoint.”

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5026 contacts →

Indirect evidence

“Symmetry is the Data+AI Security Company.”

Source: RevenueBase Database · checked Sep 27, 2026
9Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5025 contacts →

Partial evidence

“Actifile helps organizations automate their Data Discovery, Monitoring and Protection needs, addressing external data threats (like ransomware), insider threats (like shadow IT)…”

Source: RevenueBase Database · checked Sep 27, 2026
10Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5024 contacts →

Indirect evidence

“Sentant is a next-generation cybersecurity & IT services firm with a team of experienced technology professionals.”

Source: RevenueBase Database · checked Sep 27, 2026
11Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-20023 contacts →

Partial evidence

“Cloudflare Area 1 is a cloud-native email security service that identifies and blocks attacks before they hit user inboxes, enabling more effective protection against spear…”

Source: RevenueBase Database · checked Sep 27, 2026
12Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-20018 contacts →

Strong evidence

“ActZero, now part of WatchGuard, offers a Managed Detection and Response (MDR) service that provides a powerful full-stack cybersecurity solution at a fair price.”

Source: RevenueBase Database · checked Sep 27, 2026
13Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-20018 contacts →

Indirect evidence

“At Parablu, protecting your business data is our prime focus.”

Source: RevenueBase Database · checked Sep 27, 2026
14Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5016 contacts →

Indirect evidence

“Operant AI is an industry-defining cybersecurity leader at the forefront of securing AI & MCP.”

Source: RevenueBase Database · checked Sep 27, 2026
15Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5014 contacts →

Strong evidence

“AlphaSOC performs deep inspection of your telemetry to uncover unknown threats to applications, cloud workloads, networks, and endpoints.”

Source: RevenueBase Database · checked Sep 27, 2026
16Partial evidenceSan Francisco, United StatesHQ checked Sep 27, 202611-5012 contacts →

Partial evidence

“With CloudFence, you stay informed about every network communication and activity of your cloud workloads.”

Source: RevenueBase Database · checked Sep 27, 2026
17Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5011 contacts →

Indirect evidence

“Overe's SaaS Security platform provides businesses with a comprehensive but easy-to-use Cybersecurity service.”

Source: RevenueBase Database · checked Sep 27, 2026
18Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-5010 contacts →

Indirect evidence

“AI is spreading uncontrollably across your organization.”

Source: RevenueBase Database · checked Sep 27, 2026
19Indirect evidenceSan Francisco, United StatesHQ checked Sep 27, 202651-2009 contacts →

Indirect evidence

“Metabase Q offers an end-to-end platform that enables businesses to manage, measure and mature their cybersecurity.”

Source: RevenueBase Database · checked Sep 27, 2026
20Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-2007 contacts →

Partial evidence

“PingSafe is now an important part of SentinelOne and our cloud security future.”

Source: RevenueBase Database · checked Sep 27, 2026
21Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-506 contacts →

Indirect evidence

“Petra is ITDR 2.0, built to catch business email compromise, token theft, and other identity attacks in the AI era.”

Source: RevenueBase Database · checked Sep 27, 2026
22Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202651-2006 contacts →

Partial evidence

“CloudPassage is the recognized leader in automated cloud security and compliance for dynamic application deployment environments like AWS and Azure.”

Source: RevenueBase Database · checked Sep 27, 2026
23Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 20261-105 contacts →

Partial evidence

“SubImage builds maps of your cloud environment to give you visibility on what assets you have and how they relate to each other.”

Source: RevenueBase Database · checked Sep 27, 2026
24Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 20261-105 contacts →

Partial evidence

“Cloud security today continues to be fragmented, noisy, and reactive.”

Source: RevenueBase Database · checked Sep 27, 2026
25Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 27, 202611-505 contacts →

Indirect evidence

“Enterprise Cybersecurity Made Simple”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 67 cloud threat detection and response services based in San Francisco, United States

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Cloud threat detection and response services based in San Francisco, United States at a glance

As of Sep 27, 2026
51.8%Verified-email coverage
28.3Average contacts per company
11-50Median size (employees)
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
25
11-50
27
51-200
12
201-500
1
501-1,000
1

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 67 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 cloud threat detection and response 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 “cloud threat detection and response 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 cloud threat detection and response 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 cloud threat detection and response 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, 983 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 27, 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.

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 cloud threat detection and response 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 cloud threat detection and response services are there based in San Francisco, United States?

RevenueBase identified 67 cloud threat detection and response 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?

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

Which city in the United States has the most cloud threat detection and response services?

New York leads the United States with 109 headquartered companies, followed by San Francisco (67) and Austin (54).

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 983 verified decision-maker contacts tracked across these 67 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 27, 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.