Company lists · Data refreshed September 2026
Top 11 Security consultancies based in Philadelphia, United States
RevenueBase identified 35 security consultancies headquartered in Philadelphia, United States as of September 2026 and tracks 633 professional contacts across them, including 279 with verified work emails. New York is the largest hub.
This list covers security consultancies headquartered in Philadelphia, 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.
The 11 largest security consultancies based in Philadelphia, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 31 contacts → | ||||
Partial evidence “Ingage Security provides outstanding Unarmed and Armed Security Guard Services across the following sectors: I.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 23 contacts → | ||||
Indirect evidence “Transforming IT and Cybersecurity Services for Digital Innovation CSM International LLC is a Service Disabled Veteran-owned and operated LLC focused on providing consulting and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 22 contacts → | ||||
Partial evidence “COSECURE, an ancillary business of Cozen O'Connor, is a national security consulting firm dedicated to building safer workplaces, communities, and schools through risk…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 8 contacts → | ||||
Partial evidence “Kolins Security Group is a team of nationally recognized, court-certified physical security experts.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 7 contacts → | ||||
Partial evidence “4A Security & Compliance (4A) employs a risk management approach to information security and compliance services from security risk assessment, vulnerability assessment…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 7 contacts → | ||||
Partial evidence “The vision of Signal 88 Security, since its founding in 2003, is to provide a full suite of world-class and industry-leading security services for residential, commercial, retail…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 7 contacts → | ||||
Partial evidence “Beowulf Defense and Security is an international defense and security firm offering innovative concepts in national defense and private security solutions and policies, with…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1 contacts → | ||||
Partial evidence “Markus Alliance: Securing Your Digital World We are dedicated to providing the most comprehensive cybersecurity services available, with a particular emphasis on penetration…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1 contacts → | ||||
Partial evidence “Helping high-performing companies apply pragmatic cybersecurity solutions by assessing the effectiveness of security controls, processes, teams, and technology and recommending…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1 contacts → | ||||
Indirect evidence “We make organizations more trusted, resilient and valuable, with strategies and tactics that improve cybersecurity, privacy and regulatory compliance, and risk management.” Source: RevenueBase Database · checked Sep 21, 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 consultancies. 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 consultancies.
- Partial evidence
- Its own public description names part of security consultancies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security consultancies. 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 11 of 35 security consultancies based in Philadelphia, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 279 reachable decision-makers.
Free signup · no credit card
Security consultancies based in Philadelphia, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Philadelphia, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 35 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 consultancies, 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 Philadelphia, United States whose own description of what they do matches “security consultancies”. 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 consultancies), 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 consultancies, and records with no verified work email. Companies headquartered outside Philadelphia 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, 279 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.
Security consultancies by metro in the United States
- Security consultancies in New York255
- Security consultancies in Washington175
- Security consultancies in Houston155
- Security consultancies in Los Angeles130
- Security consultancies in Atlanta127
- Security consultancies in Miami123
- Security consultancies in Dallas122
- Security consultancies in Austin113
- Security consultancies in Chicago110
- Security consultancies in San Francisco86
- Security consultancies in Tampa77
- Security consultancies in Arlington71
- Security consultancies in Denver68
- Security consultancies in San Diego66
- Security consultancies in Boston62
- Security consultancies in Charlotte62
- Security consultancies in Seattle61
- Security consultancies in Orlando60
- Security consultancies in Las Vegas59
- Security consultancies in Phoenix54
- Security consultancies in San Antonio53
- Security consultancies in Alexandria48
- Security consultancies in Raleigh44
- Security consultancies in Baltimore40
- Security consultancies in Columbia40
- Security consultancies in Minneapolis38
- Security consultancies in Portland36
- Security consultancies in Mclean35
- Security consultancies in Philadelphia35
- Security consultancies in Colorado Springs33
- Security consultancies in Columbus32
- Security consultancies in Jacksonville32
- Security consultancies in Pittsburgh32
- Security consultancies in Scottsdale32
- Security consultancies in Ashburn31
- Security consultancies in Fort Lauderdale31
- Security consultancies in Nashville31
- Security consultancies in Reston31
- Security consultancies in Richmond30
- Security consultancies in San Jose30
- Security consultancies in Plano29
- Security consultancies in Wilmington29
- Security consultancies in Sheridan28
- Security consultancies in Huntsville27
- Security consultancies in Herndon25
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 consultancies, 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 consultancies are there based in Philadelphia, United States?
RevenueBase identified 35 security consultancies headquartered in Philadelphia, 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?
Security Risk Advisors, headquartered in Philadelphia, tops this list with the largest team on record.
Which city has the most security consultancies?
New York leads with 255 headquartered companies, followed by Washington (175) and Houston (155).
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 279 verified decision-maker contacts tracked across these 35 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.
Ready to reach these companies? Verified emails and direct dials for all 35 security consultancies based in Philadelphia, United States. Start with a free account, no credit card.
Download this list →Related lists
Security consultancies by geography
- Security consultancies based in Adelaide, Australia
- Security consultancies based in Brisbane, Australia
- Security consultancies based in Canberra, Australia
- Security consultancies based in Melbourne, Australia
- Security consultancies based in Perth, Australia
- Security consultancies based in Sydney, Australia
- Security consultancies based in Barueri, Brazil
- Security consultancies based in Belo Horizonte, Brazil
- Security consultancies based in Brasilia, Brazil
- Security consultancies based in Curitiba, Brazil
- Security consultancies based in Porto Alegre, Brazil
- Security consultancies based in Rio De Janeiro, Brazil
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Security consultancies based in Adelaide, Australia
- Security consultancies based in Brisbane, Australia
- Security consultancies based in Canberra, Australia
- Security consultancies based in Melbourne, Australia
- Security consultancies based in Perth, Australia
- Security consultancies based in Sydney, Australia