Company lists · Data refreshed September 2026

Top 25 Appsec advisory services based in the United States

Name: Appsec advisory services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 2,192 companies tracked

RevenueBase identified 2,192 appsec advisory services headquartered in the United States as of September 2026 and tracks 27,100 professional contacts across them, including 11,315 with verified work emails. New York is the largest hub.

This list covers appsec advisory services headquartered in the 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

2,192Companies

27,100Contacts tracked

11,315Verified emails

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The 25 largest appsec advisory services based in the United States

Ranked by team size

Top 25 of 2,192 appsec advisory services based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to appsec advisory 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	OPTIV	Partial evidence	Leawood, KS, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,222 contacts →
	Partial evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 21, 2026
2	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 21, 2026
3	Black Duck	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 21, 2026	5,001-10,000	1,187 contacts →
	Indirect evidence “Black Duck® meets the board-level risks of modern software with True Scale Application Security, ensuring uncompromised trust in software for the regulated, AI-powered world.” Source: RevenueBase Database · checked Sep 21, 2026
4	Checkmarx	Indirect evidence	Paramus, NJ, United StatesHQ checked Sep 21, 2026	501-1,000	1,042 contacts →
	Indirect evidence “Checkmarx helps the world’s largest enterprises get ahead of application risk without slowing down development.” Source: RevenueBase Database · checked Sep 21, 2026
5	Cyderes	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 21, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 21, 2026
6	Veracode	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 21, 2026	501-1,000	552 contacts →
	Indirect evidence “Veracode is a global leader in Application Risk Management for the AI era.” Source: RevenueBase Database · checked Sep 21, 2026
7	Aujas Cybersecurity	Indirect evidence	Cupertino, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	473 contacts →
	Indirect evidence “At Aujas Cybersecurity, we specialize in building and transforming cybersecurity postures to help businesses effectively mitigate risks.” Source: RevenueBase Database · checked Sep 21, 2026
8	Owasp Foundation	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 21, 2026	n/a	438 contacts →
	Indirect evidence “The Open Worldwide Application Security Project (OWASP) is a worldwide free and open community focused on improving the security of software.” Source: RevenueBase Database · checked Sep 21, 2026
9	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
10	Dark Wolf	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 21, 2026	501-1,000	348 contacts →
	Indirect evidence “Dark Wolf provides DevSecOps agile software development, information operations, penetration testing and incident response, applied research and rapid prototyping, machine…” Source: RevenueBase Database · checked Sep 21, 2026
11	Bishop FOX	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 21, 2026	201-500	344 contacts →
	Indirect evidence “Bishop Fox is recognized as the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface…” Source: RevenueBase Database · checked Sep 21, 2026
12	Security Risk Advisors	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 2026	201-500	315 contacts →
	Indirect evidence “We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.” Source: RevenueBase Database · checked Sep 21, 2026
13	Prescient Security	Indirect evidence	Nashville, TN, United StatesHQ checked Sep 21, 2026	201-500	272 contacts →
	Indirect evidence “Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: RevenueBase Database · checked Sep 21, 2026
14	Brickred Systems	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 21, 2026	501-1,000	266 contacts →
	Indirect evidence “BrickRed Systems is Microsoft Gold certified partner also one among the leading Information Technology (IT) Consulting firms of the present generation.” Source: RevenueBase Database · checked Sep 21, 2026
15	Baxter Clewis Cybersecurity	Indirect evidence	Cedar Hill, TX, United StatesHQ checked Sep 21, 2026	201-500	255 contacts →
	Indirect evidence “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Source: RevenueBase Database · checked Sep 21, 2026
16	Securin INC	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 21, 2026	201-500	244 contacts →
	Indirect evidence “Securin is obsessed with helping leaders continuously improve their security posture.” Source: RevenueBase Database · checked Sep 21, 2026
17	Software Engineering Services	Indirect evidence	Bellevue, NE, United StatesHQ checked Sep 21, 2026	51-200	234 contacts →
	Indirect evidence “SES is a cutting edge provider of IT consulting services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Noname Security	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	201-500	232 contacts →
	Indirect evidence “Noname Security is the only company taking a complete, proactive approach to API Security.” Source: RevenueBase Database · checked Sep 21, 2026
19	Loginsoft	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	220 contacts →
	Indirect evidence “For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Source: RevenueBase Database · checked Sep 21, 2026
20	Sayers	Indirect evidence	Vernon Hills, IL, United StatesHQ checked Sep 21, 2026	51-200	209 contacts →
	Indirect evidence “At Sayers, we offer expert guidance to help organizations tackle cyber, cloud, and IT infrastructure challenges.” Source: RevenueBase Database · checked Sep 21, 2026
21	Mindpoint Group, A Quantum SKY Company	Indirect evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	204 contacts →
	Indirect evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 21, 2026
22	Tevora	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	201-500	199 contacts →
	Indirect evidence “Founded in 2003, Tevora is a specialized management consultancy focused on cybersecurity, risk, and compliance services.” Source: RevenueBase Database · checked Sep 21, 2026
23	Softsages Technology	Indirect evidence	Malvern, PA, United StatesHQ checked Sep 21, 2026	201-500	198 contacts →
	Indirect evidence “SoftSages Technology is an information technology company that specializes in IT consulting, software development, mobile application development, and IT security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
24	Kualitatem INC	Indirect evidence	NY, United StatesHQ checked Sep 21, 2026	201-500	186 contacts →
	Indirect evidence “Kualitatem empowers businesses to deliver quality software.” Source: RevenueBase Database · checked Sep 21, 2026
25	Deepseas	Indirect evidence	Globally Distributed, United StatesHQ checked Sep 21, 2026	201-500	182 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” 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: appsec advisory 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 appsec advisory services.
Partial evidence: Its own public description names part of appsec advisory services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name appsec advisory 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 2,192 appsec advisory services based in the United States

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Appsec advisory services based in the United States at a glance

As of Sep 21, 2026

41.8%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,416

11-50

568

51-200

149

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,192 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 appsec advisory 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 the United States whose own description of what they do matches “appsec advisory 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 appsec advisory 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 appsec advisory services, and records with no verified work email. Companies headquartered outside United States 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, 11,315 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.

Appsec advisory services by metro

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 appsec advisory 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 appsec advisory services are there based in the United States?

RevenueBase identified 2,192 appsec advisory services headquartered in the 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?

OPTIV, headquartered in Leawood, tops this list with the largest team on record.

Which city has the most appsec advisory services?

New York leads with 70 headquartered companies, followed by Austin (47) and San Francisco (46).

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 11,315 verified decision-maker contacts tracked across these 2,192 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.