Company lists · Data refreshed September 2026
Top 10 Security auditing firms based in Columbia, United States
RevenueBase identified 26 security auditing firms headquartered in Columbia, United States as of September 2026 and tracks 285 professional contacts across them, including 34 with verified work emails. New York is the largest hub.
This list covers security auditing firms headquartered in Columbia, 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 10 largest security auditing firms based in Columbia, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 119 | ||||
“SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 15 | ||||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 15 | ||||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Secure Innovations, LLCIndirect evidence | 13 | |||
“Our highly-skilled professionals have an average of 20+ years of experience working with, and in, the public sector.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Ndepth Security, LLCPartial evidence | 10 | |||
“nDepth Security, LLC is a service-oriented, small business that strives to be a profound leader in providing support in all areas of systems engineering, information assurance…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Shield 7 ConsultingIndirect evidence | 8 | |||
“Shield 7 operates as a Veteran Owned consulting firm and VAR based in Maryland.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3 | ||||
“Coefficient Technologies provides the most up-to-date cyber security solutions, strategies, and IT services to help companies defend themselves from known and unknown APTs and…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 2 | ||||
“Today, data has become the world’s most valuable (and vulnerable) resource.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Ramparts SecurityIndirect evidence | 2 | |||
“The Ramparts team has over 3 decades of experience performing threat analysis for critical infrastructure and defense systems, and over a decade of experience leading adversarial…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1 | ||||
“Many small businesses avoid cybersecurity because they are overwhelmed or by it, or because they feel uncertain, assuming they are protected.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 10 of 26 security auditing firms based in Columbia, United States
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Security auditing firms based in Columbia, 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 Columbia, over 26 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 auditing 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 Columbia, United States whose own description of what they do matches “security auditing 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 auditing firms, and records with no verified work email. Companies headquartered outside Columbia 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, 34 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 auditing firms by metro in the United States
- Security auditing firms in New York86
- Security auditing firms in Atlanta77
- Security auditing firms in Austin67
- Security auditing firms in Houston66
- Security auditing firms in Tampa64
- Security auditing firms in Washington64
- Security auditing firms in Chicago58
- Security auditing firms in Dallas54
- Security auditing firms in Miami50
- Security auditing firms in San Francisco50
- Security auditing firms in Los Angeles43
- Security auditing firms in San Diego36
- Security auditing firms in Arlington33
- Security auditing firms in Charlotte32
- Security auditing firms in Seattle31
- Security auditing firms in Las Vegas27
- Security auditing firms in Columbia26
- Security auditing firms in Denver26
Frequently asked
How many security auditing firms are there based in Columbia, United States?
RevenueBase identified 26 security auditing firms headquartered in Columbia, 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?
Sealing Technologies, A Parsons Company, headquartered in Columbia, tops this list with the largest team on record.
Which city has the most security auditing firms?
New York leads with 86 headquartered companies, followed by Atlanta (77) and Austin (67).
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 34 verified decision-maker contacts tracked across these 26 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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