Penetration Testing for SaaS Companies (SOC 2 & ISO 27001 Ready)
Penetration testing for UK and international SaaS companies: B2B, vertical and enterprise software, white-label platforms. SOC 2 Type I and Type II evidence, ISO 27001:2022 Annex A 8.8, tenant isolation, API authentication, SSO and role escalation. CREST-accredited.
- Unlimited retesting
- Unlimited pre-retesting
- No hidden fees
“I would highly recommend EJN Labs to any organisation seeking reliable, detailed, and well-managed penetration testing services, particularly for government or enterprise-level projects.”
“There wasn’t another company we could find that could deliver what we needed in the timeframe we needed. The client loved it, and we got instant ROI from the engagement.”
Most SaaS clients receive auditor-ready evidence within 6 weeks: scoping, active testing, reporting, and a free retest after remediation.
What SOC 2 and ISO 27001 Auditors Expect
Multi-Tenant Boundaries. SOC 2 CC6 and ISO 27001 A.9 require demonstrable tenant isolation. Pen testing validates that one tenant cannot reach another tenant’s data through application logic, API auth flaws, or shared infrastructure.
Annual Re-Test. SOC 2 Type II auditors typically look for annual evidence; ISO 27001:2022 Annex A 8.8 asks you to identify and evaluate technical vulnerabilities once you declare that control applicable. In our experience most SaaS firms commission one full pen test annually, plus targeted retests after major releases.
Auditor-Ready Reporting. SOC 2 control narratives and ISO 27001 SoA mappings sit directly inside our reports. Your auditor receives the evidence with control references already attached, no translation work required.
Who we test for. B2B and vertical SaaS vendors, enterprise software companies and white-label platforms, from a first enterprise security questionnaire to an annual SOC 2 cycle. The systems we see most: multi-tenant web apps, customer portals, admin consoles, integration marketplaces and embedded analytics dashboards.
SCOPE
What We Test for UK SaaS Companies
Web Applications
Multi-tenant logic, tenant isolation and row-level security, delegated administrators, organisation invites, data export paths, IDOR across tenant boundaries, business-logic flaws.
REST & GraphQL
OWASP API Top 10. JWT/OAuth flow scrutiny, broken object-level authorisation, mass assignment, rate limiting, and tenant-data scoping.
SSO & Provisioning
SAML and OIDC login, just-in-time and SCIM provisioning, account linking, custom domains and API keys. Can a user or a key end up inside the wrong customer’s organisation?
AWS / Azure / GCP
CIS Benchmark-aligned configuration review. IAM, S3/Storage, KMS/Key Vault, secrets management, and segregation testing for multi-tenant deployments.
Secure Code Review
Manual review against OWASP top patterns, hard-coded secrets, unsafe deserialisation, cryptographic misuse, and supply-chain dependency vulnerabilities.
Attack Surface Monitoring
Continuous external surface discovery. New asset detection, exposed services, certificate monitoring, and credential leak detection between annual tests.
Phishing Assessments
Targeted campaigns against engineering and admin users. Credential harvesting, MFA bypass, OAuth phishing for SaaS-platform compromise scenarios.
OUR PROCESS
From Scope to Attestation in 4-6 Weeks
Scoping Call
30-minute technical scoping call. Define attack surface, methodology, rules of engagement, and timeline. Fixed-price quote within 24 hours.
Active Testing
3-15 days of hands-on testing by CREST-certified pen testers. Daily status updates and live findings delivered to your client portal.
Reporting
Executive summary plus full technical report with CVSS scores, reproduction steps, screenshots, and specific remediation. 60-minute walkthrough call.
Free Retest
After remediation, we retest at no extra charge. Letter of attestation provided for audit, regulator submission, or insurance underwriting.
CREDENTIALS
Verified Accreditations Auditors Accept
Every credential below is independently verifiable. UK procurement teams, FCA supervisors, ISO 27001 / SOC 2 auditors, and cyber insurance underwriters all recognise these standards.
GET YOUR QUOTE
Get a CREST SaaS pen test quote in 24 hours
A fixed-price quote back in one business day, from a named CREST assessor. No sales pipeline, no chasing.
- CREST and IASME accredited. Testing your auditors and clients already recognise.
- Fast-track testing within 24 hours where required. Free retest of every fix included.
- Live findings via your client portal, not a four-week PDF.
- Fixed price from £3,500 for a single-role, single-app scope, agreed up front. Most engagements run £5,000 and up. No day-rate surprises.
Dan WilcocksonFounder, CelloriUnder NDA Further named references available on a scoping call.
- We reply within one business day with a fixed-price quote from a named CREST assessor.
- You approve the scope and we book a start date, usually within 24 hours.
- Live findings land in your client portal as we test, with a free retest of every fix.
Get your fixed pen test quote in 24 hours
Quote request received
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COMPLIANCE READY
Reports Aligned to Every Framework
Findings map to specific control references in each framework, so your audit team submits the report directly without translation work.
SOC 2 Type I & II
CC6 logical access, CC7 system operations, CC8 change management evidence.
ISO 27001
Annex A 8.8 management of technical vulnerabilities plus A.5.15 access control validation.
UK GDPR / EU GDPR
Article 32 effectiveness testing, customer-data security controls.
NIST CSF
Identify-Protect-Detect-Respond mapping for SaaS deployments.
CCPA / HIPAA
For SaaS processing US customer data, controls aligned to relevant US regulations.
Cyber Essentials Plus
Direct certification through our IASME body status.
PRICING
Indicative Engagement Pricing
Fixed-price quotes confirmed during scoping. Free retest, executive summary, walkthrough call, and letter of attestation included.
Depends on app complexity
Single user role, basic CRUD application, marketing website with auth. Around 5 working days from kickoff to report.
Get a fixed quoteDepends on app complexity
Multi-role SaaS, business application with payment integration. Around 8 to 12 working days from kickoff to report.
Get a fixed quoteDepends on app complexity
Multi-tenant platform, complex authorisation matrix, integration-heavy applications. Around 15 to 20 working days from kickoff to report.
Get a fixed quoteWHY EJN LABS
What You Get From SaaS Penetration Testing
Six concrete differentiators competitors don’t all match.
CREST-Certified Testers, Verifiable
Every test by a CREST-certified pen tester (CRT, CCT APP, CCT INF where applicable). Verify our company status at crest-approved.org.
24-Hour Startup, Where Required
From signed scope to active testing in a single business day for incident response, audit deadlines, or regulator-driven timelines.
Live Findings, Not 4-Week PDFs
Critical issues reported during testing through your client portal. Your team remediates while testing continues.
Audit-Ready Reports
Executive summary plus full technical report with CVSS scores and explicit framework mappings (ISO 27001, SOC 2, PCI DSS, FCA SYSC).
Free Retests, Standard
Verify remediation of every finding before close-out. Letter of attestation for audit submission included. Most competitors charge £1,500-£3,000 per retest.
UK-Based CREST Testers
Every engagement performed by vetted, UK-based CREST-certified testers, matched to your needs, security clearance, and compliance scope.
FAQ
Frequently Asked
Do you support SOC 2 Type II evidence collection?
Yes. Our reports include SOC 2 Trust Services Criteria mappings (CC6, CC7, CC8) ready for auditor review. We can also provide a control narrative document tailored to your specific Type II audit period.
Can you test our development pipeline?
Yes. CI/CD pipeline review covers secret scanning, dependency vulnerabilities, build provenance, and access controls on the deployment toolchain. SLSA framework alignment optional.
Multi-region SaaS testing?
We test the global production deployment from a UK origin, plus targeted scenarios from regional perspectives where geo-aware controls (data residency, regional API gateways) need validation.
How do you handle production data during testing?
We require a non-production environment that mirrors production data structures with synthetic or masked PII. For limited production testing, we operate with explicit firm-side authorisation, restricted scope, and real-time SOC coordination.
Do you test customer integrations / webhooks / OAuth?
Yes. Webhook signature validation, OAuth flow scrutiny (PKCE, state parameter, redirect URI validation), and customer-tenant integration boundaries are core to SaaS engagement scope.
Time to ship a new SOC 2-ready report?
Typical SOC 2-aligned engagement: scoping (week 1), active testing (week 2-3), reporting (week 4), free retest after remediation (week 5-7). Most SaaS clients receive auditor-ready evidence within 6 weeks.
Continuous vs annual testing?
If you ship code weekly or daily, annual testing is insufficient for ISO 27001 spirit-of-control. We offer continuous attack surface monitoring plus quarterly scoped tests for high-velocity teams. See our attack surface monitoring service.
What does a SaaS test check that a standard web app test does not?
Tenant isolation first: whether one customer can read or change another customer’s data through the app, the API, exports, background jobs or shared caches. Then delegated admin rights, invites, SSO provisioning, API key scope and custom domains.
Which SaaS companies do you test for?
B2B and vertical SaaS vendors, enterprise software companies and white-label platforms, typically preparing for SOC 2, ISO 27001 or an enterprise customer’s security review. See our case studies.
What’s in the report?
Executive summary (board-ready), technical report with CVSS 3.1 scores, reproduction steps, screenshots, specific remediation guidance, and a 60-minute walkthrough call. Letter of attestation issued after free retest.
Do you sign NDAs?
Yes. We sign client-supplied NDAs as standard. Engagement data is protected under our ISO 27001 (BSI-audited) information security management system.
How quickly can you start?
From signed scope to active testing in 24 hours where required. Standard pipeline is 3-5 business days from initial scoping call to test start.
Are your testers UK-based and what certifications do they hold?
Every engagement is performed by vetted UK-based CREST-certified testers matched to your engagement based on security clearance, compliance scope, and sector specialism. Testers hold CREST certifications relevant to their discipline (CRT, CCT APP, CCT INF, CCSAM).
20+ CREST-accredited testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Get my SaaS pen test scope
A CREST-certified pen tester will contact you within one business day with a fixed price aligned to your SOC 2 and ISO 27001 needs.
