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Cyber Security Firms

Best Cyber Security Firms in Atlanta

Atlanta is a payments, logistics and healthcare hub, home to several of the largest card processors, where PCI DSS and HIPAA work sit alongside a fast-growing mid-market. The firms on this list were checked the same way as every list on the site. Rank one is the best overall, ranks two to four are the best for small business, managed detection and compliance work, and the rest cleared the same checks.

10 firms ranked21 evaluatedChecked
  1. 01Best overall
  2. 02Best for small business
  3. 03Best for managed detection
  4. 04Best for compliance
  5. 05+The rest of the shortlist, ranked on the same checks
Rank 01
VerSprite logo

VerSprite

Best overall

An Atlanta security consultancy that wrote the PASTA threat modeling methodology.

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Why they are on this list
  • Works from Piedmont Road in Buckhead, and the CREST member register records the firm as headquartered in Atlanta with eight years of membership
  • Carries the CREST penetration testing accreditation, which is an assessment of how the firm scopes, runs and reports a test rather than a badge it issued itself
  • Its CREST entry also records ISO 27001, ISO 20000, CMMC Level 1 and the GTIA Cybersecurity Trustmark, so those attestations sit on a third party's register and not only on its own site
  • Wrote the PASTA methodology for risk-centric threat modeling, which is now used well outside the firm, so a buyer can read the method before hiring the people who created it
  • Sells threat modeling, penetration testing, application security and managed detection together, so a risk found at the design stage can be tested and then watched for in production
Attestations
CREST, ISO 27001
Sectors
Healthcare, Financial services, Retail, Government, Critical infrastructure
Threat modelingPenetration testingApplication securityManaged detection and response$$$Atlanta, GA
Visit website, VerSprite(888) 242-0263
Rank 02
Cortavo logo

Cortavo

Best for small business

An Atlanta managed technology provider selling flat-fee plans with security included.

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Why they are on this list
  • Publishes three named plans with starting prices on its own site, from $105 per user per month for the Productivity plan to $205 for the Techtility plan, so a twenty-person company can compare tiers before it speaks to anyone
  • Bills one flat monthly fee per user covering help desk, cloud, hardware and connectivity as well as security, which removes the surprise invoice that ends most small-business technology relationships
  • Names what the security layer contains, listing antivirus and ransomware protection, dark web monitoring, hard drive encryption, website blocking and access review, rather than describing it in adjectives
  • Runs its Atlanta operation from an office on Riveredge Parkway with a published toll-free number, so support is not routed only through a portal
Managed IT servicesManaged cyber securityHelp desk supportCloud services$Atlanta, GA
Visit website, Cortavo1-866-267-8286
Rank 03
Cybriant logo

Cybriant

Best for managed detection

An Alpharetta managed security provider selling detection and response as its main product.

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Why they are on this list
  • Founded in 2015 and run from Cicero Drive in Alpharetta, selling managed detection and response as the main product rather than as an attachment to an IT support contract
  • Displays the MSSP Alert Top 250 MSSPs mark on its own site, a ranking a firm reaches by completing and submitting the annual survey rather than by buying a listing
  • Covers managed detection, extended detection, managed SIEM and vulnerability and patch management, so the provider that spots the problem is also the one that patches it
  • Runs operational technology security as a named service, which matters for the manufacturing and logistics operations that anchor much of the Georgia economy
  • Offers incident response and containment alongside the monitoring, so an escalation does not need a second firm and a second contract signed under pressure
Founded
2015
Sectors
Healthcare, Financial services, Manufacturing, SaaS
Managed detection and responseManaged SIEMVulnerability and patch managementIncident response$$Alpharetta, GA
Visit website, Cybriant844-411-0404
Rank 04
Aprio logo

Aprio

Best for compliance

An advisory and accounting firm whose assurance practice holds five separate assessor credentials.

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Why they are on this list
  • States on its own site that it is a credentialed FedRAMP 3PAO, CMMC C3PAO, PCI QSA, HITRUST External Assessor and an ANAB-accredited ISO certification body, which is five accreditations from five separate bodies
  • Holds the CMMC C3PAO credential, so a defense supplier can get the certifying assessment from the same firm that ran the readiness work rather than being handed to a partner
  • Runs the assurance work inside a CPA firm, so a SOC report is issued under an accounting license and to accounting standards rather than as a consultant's letter
  • Publishes the specific PCI merchant and service provider levels its assessors can sign for, so a buyer can tell before a call whether the firm can complete their attestation
  • Keeps an Atlanta office on Summit Boulevard and states it has served clients in the city since 1952, which is longer than most of the frameworks it now assesses against have existed
Attestations
PCI QSA, HITRUST External Assessor, FedRAMP 3PAO, CMMC C3PAO, ANAB-accredited ISO certification body
Sectors
Technology, Healthcare, Retail and e-commerce, Federal contractors, Financial services
SOC reportingPCI DSS assessmentsHITRUST assessmentsFedRAMP assessments$$$Atlanta, GA
Visit website, Aprio(404) 892-9651
Rank 05

Raxis

An Atlanta penetration testing firm that tests by hand rather than by scanner.

Checked
  • Founded in Atlanta in 2011 and still headquartered there, doing testing as the business rather than as an upsell on a managed services contract
  • States that every test is run by hand by certified testers on its own US-based staff and offers no automated tier, which is a scoping commitment a buyer can hold it to in writing
  • Its testers have published twelve CVEs in enterprise software, which is public evidence that the team finds new issues rather than rediscovering known ones
  • Sells continuous testing under the Raxis Attack name, with tests launched on demand and fixes retested through the year, so a remediation does not wait for the next annual engagement
  • Named a top penetration testing company and a top cybersecurity company in Atlanta in the 2026 Clutch awards
Founded
2011
Sectors
Critical infrastructure, Financial services, Healthcare, Government, Manufacturing
Penetration testingPenetration testing as a serviceRed team adversary simulationAttack surface management$$Atlanta, GA
Visit website, Raxis
Rank 06

Simeio

A global identity and access management provider run from metro Atlanta.

Checked
  • Names Alpharetta as its Atlanta headquarters on its own contact page, with further offices in Texas, Toronto, London, Costa Rica and Bangalore
  • Does identity and access management only, covering single sign-on, multi-factor authentication, privileged access and identity governance, rather than listing identity as one item in a wider catalog
  • Runs the Simeio Identity SOC as multi-site operations centers supporting the managed services around the clock
  • States that it protects more than 160 million identities, a figure a buyer can use to judge whether the firm has run an environment the size of its own
  • Holds SOC 2 and ISO 27001 certification and is covered by Gartner, Forrester and KuppingerCole, so both the controls and the market position are assessed outside the firm
Attestations
SOC 2, ISO 27001
Sectors
Enterprise
Identity and access managementManaged identity servicesIAM advisory and assessmentIdentity migration services$$$Alpharetta, GA
Visit website, Simeio
Also on the shortlist
Rank 07

Frazier & Deeter

An Atlanta headquartered accounting firm whose risk practice performs SOC examinations.

Website, Frazier & Deeter
Rank 08

Idenhaus

An Atlanta identity management consultancy working on IAM and CMMC readiness.

Website, Idenhaus
Rank 09

Asteros

An Atlanta penetration testing firm scoping its work to OWASP and PTES.

Website, Asteros
Rank 10

CyberGuard 6

An Atlanta incident response firm handling ransomware and business email compromise.

Website, CyberGuard 6

Cyber Security Firms may earn a referral fee if you engage a firm through a link on this site. How that works.

How to Choose a Cyber Security Firm in Atlanta

Atlanta buyers usually arrive with a framework already named for them, and the framework decides the firm. If a card brand or an acquirer is asking, you need PCI DSS work and, above a certain merchant level, an assessor who can sign the attestation rather than a consultant who can prepare you for one. If a health system is your customer, the ask is HIPAA and often HITRUST. If the Department of Defense sits somewhere in your supply chain, it is CMMC, and readiness work and the certifying assessment come from two different credentials that a single firm does not always hold. Ask which of the two you are buying before you compare prices.

If no framework is driving you, the question is different and simpler. Buy monitoring before you buy a test, because a test finds a hole and monitoring finds the person already inside one. Then check the things a website will not volunteer: who watches at three in the morning, what they may do without calling you, and whether the attestations on the page appear on the certifying body's own register. The threats worth planning for are the same in Atlanta as anywhere; what changes locally is who is asking you to prove you have planned for them.

What the Ranks Mean

Rank one is the best firm overall on the checks in the editorial policy. Ranks two to four are the best firm for one kind of buyer each: a small business, an organization buying managed detection, and an organization facing compliance work. The rest of the shortlist cleared the same checks and is ordered on them. A low rank on this list is not a warning; a firm that failed a check is not on it.

Questions about hiring a cyber security firm

What do cyber security firms in Atlanta charge?

Firms on this list publish flat-fee managed technology plans starting at $105 per user per month and rising to $205 for the top tier, with security included at every level. Penetration tests are scoped projects priced on the size of the application or network rather than on headcount. A SOC 2 examination or a PCI assessment is quoted on scope and takes months, not weeks.

Do I need a firm with an office in Atlanta?

For monitoring, no. That work is remote and the right provider may be anywhere in the country. For an assessment it matters more, because a PCI or CMMC assessor has to see systems and interview the people running them. For incident response it matters most, since someone may need to be on site with the machines while the rest of the investigation runs remotely.

What does Georgia's breach notification law require?

Georgia's statute at O.C.G.A. 10-1-912 requires notice to affected Georgia residents in the most expedient time possible and without unreasonable delay, rather than inside a fixed number of days the way many states write it. It reaches information brokers and data collectors, and those holding data on their behalf. A breach touching more than 10,000 Georgia residents also triggers notice to the nationwide consumer reporting agencies.

Does the Georgia Consumer Privacy Protection Act apply to my business?

Only above a threshold. The Act was signed in May 2026 and took effect on July 1, 2026. It reaches businesses that control or process the personal data of at least 100,000 Georgia consumers a year, or of at least 25,000 consumers where more than a quarter of gross revenue comes from selling personal data. The Attorney General enforces it. Most small businesses sit below both lines.

Which Atlanta industries drive the demand for security work?

Payments first, because the card processing industry concentrated in the metro makes PCI DSS the framework local firms see most often. Then healthcare systems and health technology companies under HIPAA and HITRUST, then defense and aerospace suppliers working toward CMMC, then the logistics and manufacturing operations running industrial systems. Several firms on this list hold the assessor credential for one of those frameworks.

What should I ask an Atlanta firm before hiring it?

Ask whether the firm can sign your assessment or only prepare you for it, because those are different credentials and different invoices. Ask who answers an alert at three in the morning and what they are allowed to do without calling you. Ask whether the attestations on the site appear on the certifying body's own register. Ask for a starting price for the work you described.

How is this list put together?

Every firm is checked on what it actually does, the attestations that can be verified, its track record, a response test where we contact it as a prospective client, and how clear it is about scope and price. Rank one is the best firm overall. Ranks two to four are the best for small business, managed detection and compliance. The editorial policy sets out each check and what fails it.

Ranked lists in other cities

Each metro is researched on its own. A firm that leads nationally does not automatically appear on a city list, and most city leaders are not national names.

The national ranking