Company lists · Data refreshed September 2026

Top 21 IT security consulting firms based in Atlanta, United States

Name: IT security consulting firms based in Atlanta, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 139 companies tracked

RevenueBase identified 139 IT security consulting firms headquartered in Atlanta, United States as of September 2026 and tracks 1,231 professional contacts across them, including 505 with verified work emails. New York is the largest hub.

This list covers IT security consulting firms headquartered in Atlanta, 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 4, 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.

How to read this list Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

139Companies

1,231Contacts tracked

505Verified emails

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The 21 largest IT security consulting firms based in Atlanta, United States

Ranked by team size

Top 21 of 139 IT security consulting firms based in Atlanta, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT security consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Tekstream SolutionsIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	51-200	179
	“Headquartered in Atlanta, Georgia, TekStream is a digital resilience company that helps organizations modernize, secure, and optimize their technology environments.” Source: company website · checked Sep 4, 2026
2	Leapfrog ServicesPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	51-200	78
	“Leapfrog offers outsourced managed IT + cybersecurity services that are scalable, aligned, and fit easily into your business model.” Source: company website · checked Sep 4, 2026
3	Fortuna CysecPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	51-200	33
	“Fortuna Cysec delivers a comprehensive security ecosystem that seamlessly integrates with your existing infrastructure, offering end-to-end protection with the flexibility to…” Source: company website · checked Sep 4, 2026
4	TrustnetIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	32
	“Since 2003, TrustNet has helped organizations mitigate cyber risks and achieve compliance efficiently and proactively.” Source: company website · checked Sep 4, 2026
5	Proda TechnologyStrong evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	29
	“Proda Technology is a full-service IT consulting firm based in Atlanta, Georgia, focused on providing tailored information technology solutions to small and medium businesses.” Source: company website · checked Sep 4, 2026
6	Purplebox, INCStrong evidence	Atlanta, United StatesHQ checked Sep 4, 2026	11-50	28
	“Secure Cloud Solutions Consulting and Managed Services PurpleBox Security Services include assessment, design, implementation and management of information security, compliance…” Source: company website · checked Sep 4, 2026
7	Genix CyberIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	51-200	26
	“Genix Cyber - Empowering Cybersecurity Excellence Welcome to Genix Cyber, a distinguished US-based advisory firm founded by former CISOs and Auditors.” Source: company website · checked Sep 4, 2026
8	HanabytePartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	16
	“HanaByte is a cybersecurity consultancy offering comprehensive services such as cloud security, security engineering, and compliance advisory services.” Source: company website · checked Sep 4, 2026
9	Trueitpros, LLCStrong evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	1-10	15
	“Business Hours: Mon - Fri: 8:30am- 6:00pm IT Services trueITpros, LLC IT Consulting has helped hundreds of small businesses create technology systems that work with you, not…” Source: company website · checked Sep 4, 2026
10	Group Nine Risk ConsultingPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	1-10	15
	“Our team of subject matter experts bring decades of global security experience in some of the most complex and austere environments around the planet.” Source: company website · checked Sep 4, 2026
11	NDNBIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	14
	“Founded in part by former Arthur Andersen and BDO professionals, the NDNB Alliance of Firms is a nationally recognized group of entities specializing in cybersecurity, data…” Source: company website · checked Sep 4, 2026
12	Cyberdata ProsPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	13
	“Keeping up with the changing data security and compliance requirements is a full-time job.” Source: company website · checked Sep 4, 2026
13	Idenhaus ConsultingPartial evidence	Atlanta, GA, United States	11-50	11
	“Idenhaus specializes in Cybersecurity and Identity Management (IAM) Consulting.” Source: company website · checked Sep 4, 2026
14	Serket-Tech SecurityPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	10
	“Serket-Tech Security helps organizations transform compliance requirements into security advantages.” Source: company website · checked Sep 4, 2026
15	AssurancepointPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	1-10	9
	“AssurancePoint is a quality-focused information security audit and compliance advisory firm.” Source: company website · checked Sep 4, 2026
16	SureshieldStrong evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	11-50	9
	“SureShield serves leading healthcare, finance, defense, manufacturing, and other industries, as well as Managed Service Providers, focused on IT risk, security and compliance.” Source: company website · checked Sep 4, 2026
17	Black Breach Security Division ITSPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	51-200	8
	“Since 2015, Black Breach has established itself as an experienced-based, client-driven cybersecurity consulting and special services firm.” Source: company website · checked Sep 4, 2026
18	Downstream ConsultingPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	1-10	8
	“We are a technology consulting firm with over 21 years experience in a wide range of industries that include: legal, financial, manufacturing, logistics and retail.” Source: company website · checked Sep 4, 2026
19	Pillar Technology Partners, LLCIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	1-10	7
	“Pillar Technology Partners helps mid-sized organizations protect the data that matters most.” Source: company website · checked Sep 4, 2026
20	Design Compliance And Security, LLCPartial evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	1-10	6
	“Design Compliance and Security is a leading provider of compliance and security services to businesses of all sizes throughout the United States.” Source: company website · checked Sep 4, 2026
21	ImaginexIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	51-200	5
	“ImagineX is a leading digital services firm whose mission is to help our clients and technologists to #BeBetter.” Source: company website · checked Sep 4, 2026

Showing 21 of 139 IT security consulting firms based in Atlanta, United States

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IT security consulting firms based in Atlanta, United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 239 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

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 Atlanta, over 139 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 IT 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 Atlanta, United States whose own description of what they do matches “IT 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 IT security consulting firms, and records with no verified work email. Companies headquartered outside Atlanta 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, 505 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 4, 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.

IT security consulting firms by metro in the United States

Frequently asked

How many IT security consulting firms are there based in Atlanta, United States?

RevenueBase identified 139 IT security consulting firms headquartered in Atlanta, 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?

Tekstream Solutions, headquartered in Atlanta, tops this list with the largest team on record.

Which city has the most IT security consulting firms?

New York leads with 239 headquartered companies, followed by Houston (148) and Atlanta (139).

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 505 verified decision-maker contacts tracked across these 139 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 4, 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.