Company lists · Data refreshed September 2026
Top 25 Security consulting firms based in Austin, United States
RevenueBase identified 96 security consulting firms headquartered in Austin, United States as of September 2026 and tracks 868 professional contacts across them, including 254 with verified work emails. New York is the largest hub.
This list covers security consulting firms headquartered in Austin, 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 6, 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 security consulting firms based in Austin, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 167 | ||||
“11:11 Systems is a managed infrastructure solutions provider that empowers customers to modernize, protect, and manage mission-critical applications and data, leveraging 11:11’s…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 138 | ||||
“Priebe Security Services, known and respected for nearly two decades, has been providing personalized, client centric professional security services for most of Austin’s most…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 119 | ||||
“Edgile was founded in 2001 to deliver strategic cybersecurity and risk management services to the Fortune 500.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 28 | ||||
“We live in a world where security is what we all strive for but struggle to find.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 14 | ||||
“ALCON DTS is a leader in the Managed IT Services and Cyber Security industry with headquarters located in Austin, TX.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 13 | ||||
“THE trusted partner for state and local governments in combating cyber threats Our journey began with Splunk and evolved to meet our clients' diverse needs, leading us to…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Esco Security ConsultingStrong evidence | 8 | |||
“ESCO is an Austin, TX, based consulting firm formed in 2002 by public safety and event security professionals completing their assignment on the Salt Lake City Winter Olympic…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 6 | ||||
“Aspiryon is a provider of Information Technology and Physical Security Solutions, that sets a standard of excellence for the clients that we serve.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 5 | ||||
“Gardient provides managed services, systems integration and consulting.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 4 | ||||
“We are a team of experienced and certified crime prevention consultants who provide customized solutions for your security needs.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 3 | ||||
“Data Defense Partners is your strategic ally in securing today’s digital enterprise.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 3 | ||||
“Fidelis Risk Advisory helps navigate the leadership challenges and complexity around building and managing information security programs.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 3 | ||||
“We're a specialty consulting firm that provides information security, data privacy, IT, cyber security assurance and trust expertise.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3 | ||||
“Founded in 2019, Enigma Advisory is a strategic advisory firm that helps organizations plan, fund, govern, and execute complex initiatives.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 2 | ||||
“American Information Security Group-AISG-is an information security Security-as-a-Service [SaaS] professional services firm founded in Austin, Texas.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2 | ||||
“zibernetics is a consultancy that helps companies wanting to improve their security operations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1 | ||||
“The Lindemann Group LLC - Executive Security Solutions Welcome to The Lindemann Group LLC, where we redefine executive security with a commitment to discretion, vigilance, and…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | Kaerus Consulting LLCPartial evidence | 1 | |||
“We provide CFIUS, DCSA, and Team Telecom mitigation experts for Security Director, Outside Director, Proxy Holder, Voting Trustee, Divestment Trustee, Security Officer, Third…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | Fastcasual ITPartial evidence | 1 | |||
“Managed Security Service Provider providing CyberSecurity, Compliance, Access Control & Video Surveillance” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Mathan Cyber Security, LLCPartial evidence | 1 | |||
“Mathan Cyber Security provides fractional CISO leadership and security advisory services for defense contractors navigating CMMC certification and healthcare organizations…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 | ||||
“Coursen Security Group (CSG) is a a premier threat management consultant to world leaders, celebrities, Fortune 500 titans, and organizations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 | ||||
“Corporate Security Teams: We target our services to fill the gap between your Leadership’s expectations and the bandwidth of your team.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 | ||||
“Do you know if your sensitive data is secure?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 | ||||
“Amplify GRC is an information security consultancy specializing in Governance, Risk, & Compliance (GRC) solutions.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Secure Start PartnersPartial evidence | 1 | |||
“Secure Start Partners is led by Nick Leghorn, Sarah Triplett and a team of information security professionals that have a combined 35+ years of experience in the industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 96 security consulting firms based in Austin, United States
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Security consulting firms based in Austin, United States at a glance
As of Sep 6, 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 Austin, over 96 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 consulting firms, 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 Austin, United States whose own description of what they do matches “security consulting firms”. 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 security consulting firms, and records with no verified work email. Companies headquartered outside Austin 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, 254 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 6, 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 consulting firms by metro in the United States
- Security consulting firms in New York189
- Security consulting firms in Washington139
- Security consulting firms in Houston124
- Security consulting firms in Atlanta118
- Security consulting firms in Austin96
- Security consulting firms in Chicago90
- Security consulting firms in Dallas90
- Security consulting firms in Los Angeles88
- Security consulting firms in Miami88
- Security consulting firms in San Francisco73
- Security consulting firms in Arlington65
- Security consulting firms in Tampa63
- Security consulting firms in Denver56
- Security consulting firms in San Diego55
- Security consulting firms in Alexandria53
- Security consulting firms in Charlotte53
- Security consulting firms in Seattle52
- Security consulting firms in Boston47
- Security consulting firms in Orlando43
- Security consulting firms in San Antonio43
- Security consulting firms in Las Vegas41
- Security consulting firms in Columbia39
- Security consulting firms in Phoenix39
- Security consulting firms in Reston37
- Security consulting firms in Raleigh36
- Security consulting firms in Minneapolis35
- Security consulting firms in Baltimore33
- Security consulting firms in Mclean33
- Security consulting firms in Huntsville29
- Security consulting firms in Columbus28
- Security consulting firms in Herndon28
- Security consulting firms in San Jose28
- Security consulting firms in Pittsburgh27
- Security consulting firms in Ashburn26
- Security consulting firms in Colorado Springs26
- Security consulting firms in Scottsdale26
- Security consulting firms in Philadelphia25
- Security consulting firms in Richmond25
Frequently asked
How many security consulting firms are there based in Austin, United States?
RevenueBase identified 96 security consulting firms headquartered in Austin, 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?
Ntirety, headquartered in Austin, tops this list with the largest team on record.
Which city has the most security consulting firms?
New York leads with 189 headquartered companies, followed by Washington (139) and Houston (124).
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 254 verified decision-maker contacts tracked across these 96 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 6, 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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