Best Pentest Companies in 2026: 40 Firms Ranked by What You Need Tested

Most lists of the best pentest companies rank by brand size. That produces a top ten of global consultancies that would each be a poor choice for most of the people reading. The useful question is narrower: what has to be tested, who has to accept the report, and how often the test will repeat.

We sorted forty firms into the scopes they are strongest at: web applications and APIs, cloud estates, identity and Active Directory, software and cryptography, hardware and embedded systems, red team operations, compliance-driven programmes and continuous testing. Within each scope the ranking weighs the seniority of the people who do the work, whether prices are published, what the report has to satisfy, and how the firm behaves when the scope is small.

Industry matters as much as scope. A bank, a fintech, a hospital and a SaaS company face different attackers, different regulators and different procurement rules, which is why the section on our own specialist practices near the end is organised by industry. Read the fit matrix first, then the detailed entries for the firms it points you to.

Each row names the firms that are strongest for that scope, drawn from the detailed entries below. Pricing models are those the firms publish or describe themselves.

Eight firms in depth, then twelve strong specialists, then the rest of the forty in a comparison table.

When the reader of the report is a regulator and a board at the same time, NCC Group is the name that closes the argument. Founded in 1999 and headquartered in Manchester, it runs one of the largest technical assurance practices in the world, delivering research-driven assessments and managed services across the UK, Europe, North America and Asia Pacific.

The reality check: everything about NCC Group is sized for enterprise procurement: a formal scoping process, a statement of work that can take weeks to agree, and day rates built for banks and governments. A 60-person SaaS company gets a professional test and pays enterprise overhead for it, and the consultant on the job may be several layers away from the person who sold it.

Popular Services: Penetration testing, red teaming, application security, hardware and embedded testing, managed vulnerability scanning

Best For: Regulated enterprises and governments that need a globally recognised name on the report, multi-country scopes and formal testing schemes.

Engineers trust Trail of Bits because it shows its work. Founded in New York in 2012, the firm has published more than 600 audit reports and maintains over 200 open-source repositories, and its research on software, blockchains and AI systems is read by the people who build those systems. The reports read like engineering documents because engineers who maintain the tools wrote them.

The reality check: this is a software assurance firm before anything else. A classic network pentest, a phishing campaign or a PCI DSS scope belongs elsewhere. Code review, cryptography, smart contracts, compilers and AI systems are where it is best, and it prices for that depth, with waiting lists in busy quarters.

Popular Services: Security reviews of software and smart contracts, cryptography audits, AI and machine learning security assessments, research partnerships

Best For: Companies whose product is code: protocols, wallets, exchanges, developer tools and AI systems, where a finding has to survive peer review.

Bishop Fox calls itself the leading authority in offensive security, and its practice is broad enough to support the claim: web, mobile and API testing, cloud testing across AWS, Azure and GCP, internal, external and wireless networks, IoT and product testing, and adversary emulation across technical, physical and social domains. Its Cosmos platform keeps attack surface testing running between point-in-time engagements.

The reality check: a premium, US-centric consultancy with mid-market and enterprise minimums. Pricing is quote-only and the continuous platform is priced apart from the tests. One web application for a SOC 2 auditor will carry the cost of a brand the scope may never need.

Popular Services: Application and cloud penetration testing, red teaming, attack surface testing, product and IoT security, third-party testing

Best For: Mid-market and enterprise companies that want a recognised offensive security brand, red team exercises and continuous coverage under one contract.

Atlant Security is our firm, so weigh this entry accordingly. The model is simple: the senior consultant on the scoping call is the one who tests, runs the remediation workshop and signs the attestation letter. Scopes cover web applications, APIs, SaaS platforms, mobile apps, networks and cloud environments, with prices on the website: external network and API tests from $4,000, web application, internal network and single-platform mobile tests from $5,000, cloud and SaaS tests from $6,000. Each scope includes the report in 14 days, a remediation workshop, one free retest and an attestation letter. Industry-specific practices for banks, fintechs, healthcare providers, hospitals and DORA threat-led testing are described in their own section below.

The reality check: we are a small team by choice. Multi-week red team campaigns against a global bank, a continuous testing platform of our own and delivery teams in thirty countries are outside what we do. Senior attention, a fixed price in writing and a report your auditor accepts are what we sell, and several firms on this page are the better call when those are secondary to scale.

Popular Services: Web application, API, SaaS, mobile, network and cloud penetration testing, bank and fintech pentests, healthcare and hospital pentests, DORA threat-led penetration testing

Best For: Companies that want a fixed price before the call, a named senior tester and a report written for the auditor who will read it.

The team that created BloodHound, SpecterOps built a practice around one question: how an attacker gets from a phished laptop to domain or tenant admin. Its services cover penetration testing, attack path assessments, purple team assessments, AI red teaming and application security, supported by more than 100 open-source tools and the training courses that shaped modern adversary tradecraft.

The reality check: the value is concentrated where identity is the battlefield. A company whose risk sits in one public web application will find the identity depth impressive and largely beside the point, and pricing is quote-based with no published rates.

Popular Services: Penetration testing, attack path assessments, purple team assessments, AI red teaming, application security

Best For: Active Directory and Entra ID heavy environments, purple teaming and detection engineering validation.

Berlin's Cure53, founded in 2007 and led by Dr.-Ing. Mario Heiderich, is the firm to hire when a browser, a messenger, a password manager or a privacy tool needs a review that will be published. Many of its reports are public, which gives a buyer the strongest possible sample deliverable before signing anything.

The reality check: publication is the point, and the client list skews to software vendors and open-source projects whose users expect transparency. Infrastructure, phishing and compliance scopes belong with other firms, and engagements are quote-based.

Popular Services: Security reviews and penetration tests of browsers, web applications, messengers, password managers and privacy tools, with published reports

Best For: Software vendors and open-source projects whose users expect a transparent, published review.

Cobalt defined the pentest-as-a-service model: a platform scopes the test, assigns vetted testers from its community, streams findings into your ticketing and chat tools as they land, and tracks retesting, with human-led, autonomous, continuous and on-demand options. Its annual State of Pentesting report remains one of the few public data sets on how pentests are bought and run.

The reality check: the model trades a long relationship for speed. A tester pool, a platform and a credit system suit development teams shipping monthly. A single senior consultant who has watched your architecture evolve for three years is a different product, and credits that go unused are still paid for.

Popular Services: PTaaS for web, API, mobile, cloud and network scopes, continuous and on-demand testing, autonomous testing

Best For: Product companies releasing often that want testing on their release cadence with findings in the tools their engineers already use.

Seattle-based Rhino Security Labs concentrates on cloud penetration testing across AWS, GCP and Azure, alongside network and web application testing, and maintains open-source cloud attack tooling such as Pacu. Its research blog documents real cloud attack paths, from credential theft in container tasks to privilege escalation chains, which tells you how its testers think before you hire them.

The reality check: cloud is the reason to call. A company whose estate is mostly on-premises, or whose risk is a thick client application, is better served by a firm whose research matches that scope. Pricing is quote-based.

Popular Services: Cloud penetration testing across AWS, GCP and Azure, network and web application penetration testing

Best For: Cloud-native companies and AWS-heavy estates that want testers who publish cloud attack research.

9. Synack

Founded in 2013 by former NSA cybersecurity operators, Synack pairs its vetted Synack Red Team with AI-driven testing on a managed platform. Packages are sold by duration (Synack14, Synack90 and Synack365) with starting prices published on its pricing page, from $4,181 for a single AI pentest and $27,120 for a Synack14 package, and its Sara agent runs continuous AI testing between human cycles. Synack and NetSPI announced plans to merge in 2026.

Best for: Enterprises with wide external attack surfaces that want measurable, continuous coverage from a managed crowd. Pricing: Published entry prices; enterprise tier quoted.

10. IOActive

Independent since 1998 and headquartered in Seattle, IOActive produced some of the most cited hardware and embedded findings of the last two decades, from vehicles to satellite terminals to traffic-control sensors. It tests what most firms decline: silicon, firmware, industrial systems and the protocols between them.

Best for: Hardware, automotive, medical device, industrial and satellite scopes. Pricing: Quote-based.

11. Pen Test Partners

Testing since 2010 from the UK with a US office, Pen Test Partners runs an unusually public research programme: cars, ships, aircraft systems, children's toys and medical devices have all appeared in its published findings, and its consultants speak at conferences regularly. The testing follows how attackers behave.

Best for: UK and US firms with IoT, maritime, aviation or automotive scopes, and buyers who want a tester that publishes. Pricing: Quote-based.

12. TrustedSec

Founded by David Kennedy and based in Ohio, TrustedSec organises its practice into design, evaluation, hardening and response, with penetration testing and red teaming at the centre of evaluation. Practitioners read its research blog and use its open-source tooling.

Best for: US mid-market and enterprise buyers who want a research-active consultancy with incident response on the same bench. Pricing: Quote-based.

13. Black Hills Information Security

Based in Sturgis, South Dakota since 2008, Black Hills Information Security serves community banks through to the Fortune 100 and gives away more knowledge than any firm in the industry: pay-what-you-can training through Antisyphon, the Wild West Hackin' Fest conference and a long series of free webcasts. Services span penetration testing, continuous pentesting, web application testing, its ActiveSOC service, incident response and GRC.

Best for: Teams that want a tester whose staff teach the methodology they use. Pricing: Quote-based.

14. NetSPI

Minneapolis-based NetSPI runs its own testing bench next to a PTaaS platform, attack surface management and breach and attack simulation. Its 2026 merger with Synack is described by both firms as the largest bench of elite security researchers paired with an agentic AI pentesting platform.

Best for: Large enterprises buying a programme of tests a year with platform reporting. Pricing: Quote-based.

15. Praetorian

Austin-based Praetorian sells continuous offensive security through its Chariot platform: red team operations, assumed breach exercises, purple team operations, attack path mapping, CI/CD attack paths and penetration testing, benchmarked against MITRE ATT&CK and staffed with operators from intelligence community backgrounds.

Best for: Enterprises that want red team depth plus a continuous attack surface platform. Pricing: Quote-based; platform priced separately.

16. Coalfire

Coalfire works with enterprises and technology businesses on FedRAMP, cloud migration, AI risk and penetration testing, and is one of the best-known FedRAMP third-party assessment organisations. That shapes the testing: scopes map to control frameworks, evidence is organised for an assessor and the report is written for auditors. Thorough and procedural, priced like a large US firm.

Best for: US companies selling to government or regulated enterprises that need testing and compliance evidence from one accredited firm. Pricing: Quote-based.

17. Rapid7

The company behind Metasploit and InsightVM, Rapid7 runs penetration tests for its platform customers: external and internal networks, web applications, IoT and internet-aware devices, social engineering, wireless and red team simulation. The work is competent and well documented; the proposal will sit next to the rest of the product line.

Best for: Companies already running Rapid7 products that want one vendor for scanning, detection and an annual pentest. Pricing: Quote-based.

18. HackerOne Pentest

HackerOne Pentest assigns vetted researchers from the HackerOne community to scoped engagements with real-time reporting, built-in integrations and retesting of fixes, and now offers an agentic pentest option next to human-led testing. Coverage spans web, cloud, AI and LLM, mobile, API, network and desktop applications, plus code security audits.

Best for: Companies already running a bug bounty with HackerOne that want compliance-grade pentests on the same platform. Pricing: Quote-based; retest included.

19. Mandiant (Google Cloud)

Part of Google Cloud since 2022, Mandiant (Google Cloud) shapes its red team exercises and testing programmes with what its responders see on live breaches, and adds threat intelligence and AI security services on the same bench.

Best for: Large enterprises that want testing informed by current intrusion data and a bench that can also respond. Pricing: Quote-based.

20. Horizon3.ai

The NodeZero platform from Horizon3.ai runs autonomous penetration tests you set up in minutes across internal, external, cloud, Kubernetes and Active Directory scopes, with proof of each attack path and fix guidance you verify by running the test again. For frequent internal testing it operates at a scale no consultancy can price.

Best for: Companies that want weekly or monthly internal testing between human engagements. Pricing: Subscription, quote-based.

Solid firms that did not make the detailed cut, with the kind of company each one is, its base, the scopes it serves and how it prices.

Pentestas, number 40, is our own continuous AI penetration testing platform; it sits in the table because a continuous platform belongs with the platforms, away from the consultancies.

These ten sites are ours. Each one is the same senior team working a narrower brief: the regulator, the attacker and the systems of one industry, with scoping pages written for that buyer. They are listed here, outside the ranking, so that nobody mistakes them for independent firms.

Bank Pentest Atlant Security practice

Bank Pentest: Bank and banking app pentests for iOS, Android, web banking, APIs and payment workflows. Scoped around the systems that move money and the examiners who read the report.

Fintech Pentest Atlant Security practice

Fintech Pentest: Fintech penetration testing for APIs, payment logic, cloud identities and multi-tenant platforms, with reproducible findings written for engineers and for the compliance reviewer.

Healthcare Pentest Atlant Security practice

Healthcare Pentest: Healthcare penetration testing for patient portals, health APIs, provider networks and sensitive data flows, with evidence organised for a HIPAA reader.

Hospital Pentest Atlant Security practice

Hospital Pentest: Hospital penetration testing for clinical networks, EHR dependencies, supplier access and recovery systems, run under controls that keep clinical operations safe during the test.

TLPT DORA Atlant Security practice

TLPT DORA: Threat-led penetration testing for financial organisations with DORA obligations: scope, threat intelligence, red teaming and the closure report the supervisor expects.

Penetration Testing Services Company Atlant Security practice

Penetration Testing Services Company: Penetration testing services for web applications, APIs, cloud, mobile and internal networks, with manual validation and clear tiers for buyers comparing their first quotes.

Cybersecurity Audit Services Atlant Security practice

Cybersecurity Audit Services: Cybersecurity audit services for IT controls, Microsoft 365, cloud, identity and governance, with evidence-led findings that stand up to an external auditor.

Microsoft 365 Security Audit Atlant Security practice

Microsoft 365 Security Audit: Independent Microsoft 365 security audits covering Entra ID, Exchange, SharePoint, Teams, Intune and Copilot readiness, with a free public-record check before the audit.

Managed Cybersecurity Services Atlant Security practice

Managed Cybersecurity Services: Managed cybersecurity for Microsoft 365, Google Workspace and cloud environments: monitoring, SOC support and the remediation that pentest findings usually need afterwards.

Managed Security Services Atlant Security practice

Managed Security Services: Managed security services for workplace, cloud and security operations, with defined ownership, onboarding, monitoring and response for teams without a security function of their own.

• Who will test our systems, and what have they published or presented?
• What exactly is in scope, by asset name, and what is excluded?
• How many days of manual testing are in the price, and how is that time split across the scope?
• Which standards and clauses will findings be mapped to, and can we see a redacted report?
• Is a retest included, and within what window after we remediate?
• Who signs the report and the attestation letter, and will our auditor accept it?

Want a Fixed Price Before the Call?

Name the assets in scope and who will read the report. We reply with a fixed price, the name of the consultant who will test, and a straight answer if another firm on this page is the better fit.

Related reading

• Top 40 Penetration Testing Companies You Should Know in 2026
• Web Application Penetration Testing: What You Must Know Before Choosing a Provider
• Making Sense of All the Penetration Testing Types
• Top 45 Cybersecurity Companies You Should Know in 2026

Published: October 2026 · Author: Alexander Sverdlov, Founder and Principal Security Consultant, Atlant Security

This guide reflects our honest assessment of each firm from its own published material, public pricing where it exists, and our experience evaluating vendors for clients. Prices and positioning change; verify before you buy.