27 SOC 2 service firms that prepare you for the audit.

Best for · B2B SaaS companies going up-market (often Series A or B) that need pentests and security advisory which hold up in enterprise buyer security reviews.

Differentiator · Founded by operators from Capital One, Okta, and Bishop Fox and creators of the Red Team Maturity Model, pairing offensive testing with the enterprise buyer's perspective.

Best for · SaaS companies of roughly 50 to 300 employees that want fixed-scope, fixed-price SOC 2 readiness driven end to end, with a clean hand-off to an independent auditor.

Differentiator · Platform-neutral and operationally led, built on running a SOC 2 Type II program end to end with no MSP or compliance platform, and it never performs the audit itself by design.

Best for · Growing companies that need a US-based team to build and run a SOC 2 or ISO 27001 program end-to-end, from gap assessment through audit, rather than just buy compliance tooling.

Differentiator · Pairs each client with a two-person team (a virtual CISO plus a cybersecurity analyst) and reports that none of its clients have failed a security audit.

Best for · Tech-forward startups and scale-ups that want a full security practice built and run for them, then transitioned in-house, instead of hiring a first security team prematurely.

Differentiator · Operates as an embedded, retained security team for high-performing startups (a model it helped popularize), spanning compliance, cloud, and product security for the long haul.

Best for · Growing companies that need end-to-end audit readiness across ISO 27001, SOC 2, CMMC, and HITRUST without hiring a full-time internal compliance team.

Differentiator · Runs a managed-GRC model that builds, documents, and tests the program through internal audits, then hands off cleanly to a C3PAO, CPA firm, or certifying body; it never issues the certificate itself.

Best for · Startups and SMBs that need right-sized, affordable penetration testing and hands-on SOC 2 readiness support without the cost and overkill of enterprise engagements.

Differentiator · Runs adaptive 'fractional' pentests spread across the year instead of one large annual test, paired with compliance-readiness tooling and fractional-CISO guidance.

Best for · Mid-market companies (roughly 25 to 1,000 employees) facing a SOC 2 requirement, an unanswerable security questionnaire, or a departed CISO who need a named security executive within two weeks.

Differentiator · Staffed entirely by former CISOs (its founder co-authored the Wiley NIST CSF book); publicly traded (OTCQB: SDCH) and runs engagements on its RealCISO platform.

Best for · SMBs and government contractors that need one dedicated virtual CISO to get audit-ready for SOC 2, ISO 27001, CMMC, or FedRAMP without hiring a full-time security team.

Differentiator · A veteran- and woman-owned firm (VOSB/WOSB) led directly by a 30-year industry veteran and author, reporting a 100% first-attempt audit pass rate.

Best for · UK organisations that want ISO 27001 certification support plus SOC 2 readiness, GDPR, and penetration testing from a single accredited consultancy.

Differentiator · Has helped over 400 organisations achieve ISO 27001 certification; an NCSC-assured Cyber Advisor and CREST-accredited firm spanning ISO 27001, GDPR, PCI, and pen testing.

Best for · SMBs and growth-stage startups that want embedded, month-to-month security leadership with SOC 2 readiness and a penetration test bundled into one engagement.

Differentiator · A practitioner-led firm (CISSP, OSCP, CREST) that runs compliance and offensive testing inside a single engagement and includes a pentest at no extra cost; month-to-month, no annual lock-in.

Best for · B2B SaaS companies going up-market (often Series A or B) that need pentests and security advisory which hold up in enterprise buyer security reviews.

Differentiator · Founded by operators from Capital One, Okta, and Bishop Fox and creators of the Red Team Maturity Model, pairing offensive testing with the enterprise buyer's perspective.

Best for · Enterprises and high-growth tech companies that need senior-led offensive security across applications, networks, cloud, and AI, with reports that hold up to enterprise buyer and auditor scrutiny.

Differentiator · One of the largest private offensive-security firms, trusted by a large share of the Fortune 100; pairs manual expert pentesting with its Cosmos continuous attack-surface platform.

Best for · Fast-moving product and security teams that need on-demand penetration tests they can launch in days, with findings and retests tracked in a platform and wired into developer workflows.

Differentiator · A pioneer of pentest-as-a-service that pairs a vetted global tester community (Cobalt Core) with a platform delivering reports markedly faster than traditional engagements.

Best for · Companies that need manual, OSCP-led penetration testing with auditor-ready reports mapped to SOC 2, ISO 27001, HIPAA, or PCI compliance requirements.

Differentiator · A New York firm dedicated solely to penetration testing since 2017, delivering manual-first tests through a transparent client portal with US-based certified red-teamers.

Best for · Product and engineering teams that need deep, source-assisted application security audits of complex platforms, including GraphQL, ElectronJS, and LLM-based systems.

Differentiator · A boutique offensive-security firm that audits with a blue-team frame of reference, combining manual source-code review with dynamic testing to find design flaws others miss.

Best for · Companies that want senior-only, manual penetration testing across web, mobile, API, cloud, and network, with consultants who work directly with developers to fix what they find.

Differentiator · A family-run, CREST-accredited UK firm where every engagement is led by consultants with 10 to 20 years of experience; no juniors and no scanner-padded reports.

Best for · Teams that need deep, source-assisted security assessments for complex web, mobile, IoT, or hardware products and want findings other firms miss, right-sized to the codebase and budget.

Differentiator · A boutique assessment firm that staffs engagements by area of expertise rather than availability, with every researcher holding 5+ years of application-hacking experience.

Best for · Larger enterprises and regulated organizations that need a global provider for penetration testing, security consulting, and incident response under one roof.

Differentiator · A global, publicly listed cybersecurity firm with 25+ years and 2,000+ specialists, recognized for application-security testing and technical assurance at scale.

Best for · Large organizations and regulated enterprises that want continuous, expert-led penetration testing delivered through a managed platform rather than one-off point-in-time tests.

Differentiator · A pentest-as-a-service pioneer operating since 2001 with 350+ in-house testers; combines human-led testing with purpose-built automation across a unified platform.

Best for · Startups and SMBs that need right-sized, affordable penetration testing and hands-on SOC 2 readiness support without the cost and overkill of enterprise engagements.

Differentiator · Runs adaptive 'fractional' pentests spread across the year instead of one large annual test, paired with compliance-readiness tooling and fractional-CISO guidance.

Best for · Organizations that want adversary-emulation-grade offensive security and continuous threat exposure management rather than a one-off checkbox penetration test.

Differentiator · An offensive-security firm staffed by security engineers (not consultants) that pairs expert testing with its Chariot continuous-threat-exposure-management platform.

Best for · UK organisations that want CREST-accredited penetration testing and ISO 27001 consultancy from one provider, with findings tied back to the controls auditors check.

Differentiator · Holds triple CREST accreditation (pen testing, vulnerability assessment, and SOC) and runs a 24/7 UK-based SOC, so offensive findings feed its own detection and compliance work.

Best for · Security-conscious teams that want adversary-style penetration testing tied to SOC 2 Trust Services Criteria, not a reformatted vulnerability scan, with an auditor-ready report.

Differentiator · A US-based, pentest-only firm founded in 2011; offers SOC 2-scoped testing mapped to the Trust Services Criteria and the Raxis Attack continuous-testing platform.

Best for · Companies from high-growth startups to the Fortune 1000 that want a deep, manual, research-driven pentest mapped to SOC 2 and vendor-security requirements rather than a scan.

Differentiator · A boutique, research-led pentest firm known for original zero-day disclosures and AWS/cloud exploitation expertise, with engineers who build their own tooling.

Best for · High-growth SaaS companies preparing for SOC 2, HIPAA, or ISO 27001 that need manual, exploit-driven pentests with compliance mappings and built-in retesting to unblock enterprise deals.

Differentiator · A Canadian, manual-first pentest firm that staffs only full-time certified testers (no contractors) and delivers audit-ready evidence and remediation through its own client portal.

Best for · Organizations that ship frequently and want always-on, expert-driven penetration testing with unlimited retests and on-demand attestation reports rather than a single annual snapshot.

Differentiator · Combines an in-house offensive-security team with a continuous-testing platform; founded in 2017 and recognized in the GigaOm PTaaS Radar.

Best for · Engineering-led and high-assurance organizations that need deep security audits of code, cryptography, blockchain, and complex systems, well beyond a standard pentest.

Differentiator · A research-driven security firm (clients from Meta to DARPA) known for foundational open-source tooling and deep expertise in reverse engineering, cryptography, and exploitation.

Best for · Organizations that want CREST-certified offensive testing and pragmatic security consulting from a widely recognized US practitioner team.

Differentiator · Founded in 2012 by David Kennedy; a CREST-certified firm trusted by governments and the Fortune 500, with 7,000+ engagements and a large open-source tooling footprint.

Best for · UK organisations that want ISO 27001 certification support plus SOC 2 readiness, GDPR, and penetration testing from a single accredited consultancy.

Differentiator · Has helped over 400 organisations achieve ISO 27001 certification; an NCSC-assured Cyber Advisor and CREST-accredited firm spanning ISO 27001, GDPR, PCI, and pen testing.

Best for · B2B SaaS companies going up-market (often Series A or B) that need pentests and security advisory which hold up in enterprise buyer security reviews.

Differentiator · Founded by operators from Capital One, Okta, and Bishop Fox and creators of the Red Team Maturity Model, pairing offensive testing with the enterprise buyer's perspective.

Best for · SaaS companies of roughly 50 to 300 employees that want fixed-scope, fixed-price SOC 2 readiness driven end to end, with a clean hand-off to an independent auditor.

Differentiator · Platform-neutral and operationally led, built on running a SOC 2 Type II program end to end with no MSP or compliance platform, and it never performs the audit itself by design.

Best for · Growing companies that need a US-based team to build and run a SOC 2 or ISO 27001 program end-to-end, from gap assessment through audit, rather than just buy compliance tooling.

Differentiator · Pairs each client with a two-person team (a virtual CISO plus a cybersecurity analyst) and reports that none of its clients have failed a security audit.

Best for · Smaller organizations and startups that need GRC and vCISO support to stand up or mature a compliance program across SOC 2, ISO 27001, PCI DSS, or CMMC.

Differentiator · A boutique GRC consultancy founded by Pacific Northwest security leaders with 45+ years combined experience; offers framework scoping tools and GRC-platform implementation.

Best for · Tech-forward startups and scale-ups that want a full security practice built and run for them, then transitioned in-house, instead of hiring a first security team prematurely.

Differentiator · Operates as an embedded, retained security team for high-performing startups (a model it helped popularize), spanning compliance, cloud, and product security for the long haul.

Best for · Startups and SMBs that need right-sized, affordable penetration testing and hands-on SOC 2 readiness support without the cost and overkill of enterprise engagements.

Differentiator · Runs adaptive 'fractional' pentests spread across the year instead of one large annual test, paired with compliance-readiness tooling and fractional-CISO guidance.

Best for · Mid-market companies (roughly 25 to 1,000 employees) facing a SOC 2 requirement, an unanswerable security questionnaire, or a departed CISO who need a named security executive within two weeks.

Differentiator · Staffed entirely by former CISOs (its founder co-authored the Wiley NIST CSF book); publicly traded (OTCQB: SDCH) and runs engagements on its RealCISO platform.

Best for · SMBs and government contractors that need one dedicated virtual CISO to get audit-ready for SOC 2, ISO 27001, CMMC, or FedRAMP without hiring a full-time security team.

Differentiator · A veteran- and woman-owned firm (VOSB/WOSB) led directly by a 30-year industry veteran and author, reporting a 100% first-attempt audit pass rate.

Best for · SMBs and growth-stage startups that want embedded, month-to-month security leadership with SOC 2 readiness and a penetration test bundled into one engagement.

Differentiator · A practitioner-led firm (CISSP, OSCP, CREST) that runs compliance and offensive testing inside a single engagement and includes a pentest at no extra cost; month-to-month, no annual lock-in.

Best for · SaaS companies of roughly 50 to 300 employees that want fixed-scope, fixed-price SOC 2 readiness driven end to end, with a clean hand-off to an independent auditor.

Differentiator · Platform-neutral and operationally led, built on running a SOC 2 Type II program end to end with no MSP or compliance platform, and it never performs the audit itself by design.

Best for · Growing companies that need a US-based team to build and run a SOC 2 or ISO 27001 program end-to-end, from gap assessment through audit, rather than just buy compliance tooling.

Differentiator · Pairs each client with a two-person team (a virtual CISO plus a cybersecurity analyst) and reports that none of its clients have failed a security audit.

Best for · Smaller organizations and startups that need GRC and vCISO support to stand up or mature a compliance program across SOC 2, ISO 27001, PCI DSS, or CMMC.

Differentiator · A boutique GRC consultancy founded by Pacific Northwest security leaders with 45+ years combined experience; offers framework scoping tools and GRC-platform implementation.

Best for · Growing companies that need end-to-end audit readiness across ISO 27001, SOC 2, CMMC, and HITRUST without hiring a full-time internal compliance team.

Differentiator · Runs a managed-GRC model that builds, documents, and tests the program through internal audits, then hands off cleanly to a C3PAO, CPA firm, or certifying body; it never issues the certificate itself.

Best for · UK organisations that want CREST-accredited penetration testing and ISO 27001 consultancy from one provider, with findings tied back to the controls auditors check.

Differentiator · Holds triple CREST accreditation (pen testing, vulnerability assessment, and SOC) and runs a 24/7 UK-based SOC, so offensive findings feed its own detection and compliance work.

Best for · Mid-market companies (roughly 25 to 1,000 employees) facing a SOC 2 requirement, an unanswerable security questionnaire, or a departed CISO who need a named security executive within two weeks.

Differentiator · Staffed entirely by former CISOs (its founder co-authored the Wiley NIST CSF book); publicly traded (OTCQB: SDCH) and runs engagements on its RealCISO platform.

Best for · SMBs and government contractors that need one dedicated virtual CISO to get audit-ready for SOC 2, ISO 27001, CMMC, or FedRAMP without hiring a full-time security team.

Differentiator · A veteran- and woman-owned firm (VOSB/WOSB) led directly by a 30-year industry veteran and author, reporting a 100% first-attempt audit pass rate.

Best for · UK organisations that want ISO 27001 certification support plus SOC 2 readiness, GDPR, and penetration testing from a single accredited consultancy.

Differentiator · Has helped over 400 organisations achieve ISO 27001 certification; an NCSC-assured Cyber Advisor and CREST-accredited firm spanning ISO 27001, GDPR, PCI, and pen testing.

Best for · SMBs and growth-stage startups that want embedded, month-to-month security leadership with SOC 2 readiness and a penetration test bundled into one engagement.

Differentiator · A practitioner-led firm (CISSP, OSCP, CREST) that runs compliance and offensive testing inside a single engagement and includes a pentest at no extra cost; month-to-month, no annual lock-in.

Best for · SaaS companies of roughly 50 to 300 employees that want fixed-scope, fixed-price SOC 2 readiness driven end to end, with a clean hand-off to an independent auditor.

Differentiator · Platform-neutral and operationally led, built on running a SOC 2 Type II program end to end with no MSP or compliance platform, and it never performs the audit itself by design.

Best for · Smaller organizations and startups that need GRC and vCISO support to stand up or mature a compliance program across SOC 2, ISO 27001, PCI DSS, or CMMC.

Differentiator · A boutique GRC consultancy founded by Pacific Northwest security leaders with 45+ years combined experience; offers framework scoping tools and GRC-platform implementation.

Best for · Tech-forward startups and scale-ups that want a full security practice built and run for them, then transitioned in-house, instead of hiring a first security team prematurely.

Differentiator · Operates as an embedded, retained security team for high-performing startups (a model it helped popularize), spanning compliance, cloud, and product security for the long haul.

Best for · Larger enterprises and regulated organizations that need a global provider for penetration testing, security consulting, and incident response under one roof.

Differentiator · A global, publicly listed cybersecurity firm with 25+ years and 2,000+ specialists, recognized for application-security testing and technical assurance at scale.

Best for · Growing companies that need end-to-end audit readiness across ISO 27001, SOC 2, CMMC, and HITRUST without hiring a full-time internal compliance team.

Differentiator · Runs a managed-GRC model that builds, documents, and tests the program through internal audits, then hands off cleanly to a C3PAO, CPA firm, or certifying body; it never issues the certificate itself.

Best for · UK organisations that want ISO 27001 certification support plus SOC 2 readiness, GDPR, and penetration testing from a single accredited consultancy.

Differentiator · Has helped over 400 organisations achieve ISO 27001 certification; an NCSC-assured Cyber Advisor and CREST-accredited firm spanning ISO 27001, GDPR, PCI, and pen testing.