SaaS Penetration Testing
SaaS penetration testing
Your product is the business. When a customer, auditor or investor asks whether it has been tested, this is the engagement that answers: application, APIs and cloud, tested as one product. Part of Atoro’s penetration testing practice.
Whole-product scope, multi-tenant isolation tested, one audit-ready report, and a retest included to confirm the fixes.
Built for modern software companies · Rated 4.8/5 on G2
Whole-product scope
Multi-tenant isolation tested
Audit and questionnaire ready
Retest included
Whole-product penetration test
SAAS
TEST
Three layers, one scopeApplication, APIs and cloud tested as one product.
Multi-tenant isolationTenant boundaries tested deliberately, across every layer.
Built for the reviewAuditors, enterprise security teams and investors answered in their terms.
Validated findingsEvery issue reproduced, rated and explained by a tester.
Retest includedFixes confirmed, closure evidence provided.
What usually triggers the call
- An enterprise prospect has sent a security questionnaire.
- An ISO 27001 or SOC 2 audit is booked and needs testing evidence.
- An investor’s diligence list includes security testing.
- A big launch is coming and the product has never been tested.
- Three vendors quoted three scopes and nobody covered the whole product.
02 Why this test
Someone has asked whether your product has been tested. Here is the right answer.
For most founders and CTOs, this page becomes relevant on a specific day: an enterprise prospect sends a security questionnaire, an audit is booked, or a diligence list arrives. The question behind all three is the same. Has anyone independent tried to break this product, and what happened when they did?
A meaningful answer covers the whole product, because attackers do not respect your architecture diagram. That means the web application your users log in to, the APIs that move your data, and the cloud environment it all runs on, tested as one scope, by one team, in one engagement.
Client proof
“I appreciated Atoro for their speed and the confidence they gave us in deploying new products to production. They provided thorough penetration testing for our website, ensuring it was secure and stable. Their expertise was evident, knowing that our product was in capable hands.”
Scott A., Co-Founder & CEO · 5/5 review on G2, July 2026
The engagement: platform, API and entry-network testing for Silktide, with a detailed report of the issues found, their severity and remediation guidance. Read the Silktide case study.
03 Coverage
What a SaaS penetration test includes
One engagement, three layers, one report.
The application layer
The product your users see: authentication, session handling, access control between roles, and the business-logic flaws that only matter in your product. Full detail on our web application penetration testing page.
The API layer
The endpoints behind the interface and the ones no interface calls: authorisation object by object, token handling, data exposure. Full detail on our API penetration testing page.
The cloud layer
The AWS, Azure or GCP environment underneath: identity and access, misconfiguration, and what the internet can see of you. Full detail on our cloud penetration testing page.
Multi-tenant isolation
The one risk that is uniquely yours. Every customer on your platform is trusting you to keep them invisible to every other customer, and one missed authorisation check is all it takes to break that promise. We test isolation deliberately and across layers: application logic, API object references and cloud-level separation. If tenant boundaries can be crossed, this is the engagement that finds it before a customer does.
Attackers do not respect your architecture diagram. The test should not either.
04 Compare
One test or a testing programme?
| A point-in-time test | A testing programme |
|---|---|
| Answers today’s questionnaire or audit | Keeps the answer current as the product changes |
| One scope, one report, one retest | Testing aligned to your release and audit calendar |
| Right for a first test or a specific ask | Right once enterprise deals and audits recur every year |
Most companies rightly start with a single well-scoped test. When the questionnaires start arriving every quarter, testing becomes part of the compliance rhythm, and Atoro supports the full cycle: ISO 27001, SOC 2, internal audit and managed compliance with TrustOps.
05 Why Atoro
Why software companies test with Atoro
Whole-product scope.
Application, API and cloud in one engagement, so nothing falls between three vendors’ scoping documents.
Built for the review that triggered it.
The report answers auditors, enterprise security teams and investors in their own terms, with validated findings and closure evidence.
Human-validated. Always.
Every finding reproduced and rated by a tester. Your engineers get real issues, not scanner noise.
Compliance-native.
We run ISO 27001 and SOC 2 programmes for software companies every week. Your test is scoped by people who know exactly what the auditor will ask next.
06 Plan
A managed test from scoping to retest
We run the engagement with clear scoping, a defined testing window, and support before and after the test.
1
Scope
We map your product’s layers, agree the boundary and fix the price, usually on the first call.
2
Test
One team tests application, APIs and cloud as a single product, the way an attacker sees it.
3
Validate
Every finding reproduced, severity-rated and stripped of false positives.
4
Report
One audit-ready document covering all layers, written for engineers, auditors and customer reviewers at once.
5
Remediate
We walk your team through the findings and support the fixes.
6
Retest
Fixed findings are confirmed, with closure evidence you can hand to whoever asked.
07 Deliverables
What you receive
Every engagement is scoped first and priced to what it covers. You get the number before any agreement, usually on the first call.
Included
Scoping
A clear view of what is in scope, what is out, and what the test needs to prove.
Included
Expert penetration test
Manual and tool-assisted testing by experienced security professionals.
Included
Human validation
Findings reviewed, prioritised, and explained by testers, not exported from a scanner.
Included
Audit-ready report
Structured for engineering teams, auditors, and customer security reviews.
Included
Remediation support
Help for your team to understand and close the findings.
Included
Retest included
Confirms fixes and provides closure evidence.
No raw scanner output sold as a pen test. No vulnerability dump with no priorities. No report that leaves your engineers guessing.
08 Compliance
Evidence for ISO 27001, SOC 2 and enterprise reviews
This engagement exists to close the gap between “we take security seriously” and proof. For ISO 27001 it evidences technical vulnerability management across your real estate; for SOC 2 it supports the vulnerability identification story your auditor tests; for enterprise security questionnaires it is the current, independent test they ask for by name.
One engagement, three audiences answered.
09 FAQ
SaaS penetration testing FAQs
What does a SaaS penetration test actually include?
Whatever your product actually is, tested as one scope: typically the web application, its APIs and the cloud environment underneath, plus multi-tenant isolation across all three. Scoping maps your product’s real surface, so nothing is assumed and nothing is quietly excluded.
How often should a software company run one?
Annually as a baseline, and after major changes: a significant release, a new product line, an acquisition or an infrastructure migration. Enterprise customers and auditors generally expect a test from the last twelve months, so most companies align testing with their audit calendar.
Do you test multi-tenant isolation?
Yes, deliberately and across layers. Tenant separation is tested in application logic, in API object references and in the cloud environment, because isolation failures are the single most damaging finding class for a multi-tenant product.
Our enterprise customer has asked for a recent pen test, what do they expect to see?
Usually: an independent test from the last twelve months, scoped across the product, with a report showing validated findings, severities, remediation and retest closure. Some accept a summary letter rather than the full report. Our reporting supports both, and we can join the call with their security team if it helps the deal.
How disruptive is testing to our team?
Minimal by design. Your team provides access and context during scoping, then testing runs without pulling engineers away from their work. Most testing happens in staging, rules of engagement protect anything production, and the first real engineering time is the findings walkthrough.
What does it cost?
It depends on scope, but to anchor it: a typical test of a web application and its API, with manual validation, an audit-ready report and a retest included, starts at around €3,000. Adding the cloud environment moves the number with the size of the estate. We scope before we quote, so your price reflects what is actually tested, and you get the number on the first call.
Can we share the report with customers and auditors?
Yes. The report is written to be shared: customer security teams and auditors are half its audience. Many clients share the full report under NDA and use a summary letter for lighter-touch reviews, and we structure the deliverables to support both.
We have never been tested before, where do we start?
With a scoping call, not a purchase. We map your product’s surface, tell you honestly what needs testing first and what can wait, and fix a price for that scope. A first engagement usually starts with the application and API, then extends to cloud on the next cycle.
10 Push
Request SaaS testing pricing
Tell us who is asking and what they need to see. You get a clear scope and a fixed quote before any agreement, usually on the first call.
No raw scan sold as a pen test. No vague “starting from” proposal. No report your engineers cannot use.
We’ll review
What the test is for: product security, ISO 27001, SOC 2, customer review, or a deal
The systems, applications, APIs, and infrastructure in scope
Your timeline and any audit or customer deadline
The reporting format your reviewer or internal team needs
The remediation and retest process
The frameworks you may need next