SaaS Security Audit
A SaaS security audit built around one question: can tenants reach each other?
A SaaS security audit checks the risks specific to multi-tenant software: whether one customer can read another's data, whether roles actually restrict anything, and whether billing and quota paths can be forged. We test all three on your live app.
From $750, fixed quote, report in about a week. See full pricing
In SaaS, one missing check is a breach of every customer at once.
A single-user app that leaks, leaks one person's data. A SaaS app that misses a tenant check leaks its whole customer base, and it is precisely the check AI builders and rushed launches skip most often, because the app behaves identically with or without it. Your customers are trusting you with their data on the assumption someone verified that wall exists. This audit is that verification.
What you get.
Tenant isolation testing
Two tenants, real accounts, every route and query tried across the boundary. The finding that matters most, tested directly.
Role and permission review
Admin, member and viewer traced through the API, not the interface, to confirm each role is enforced server-side.
Billing and quota paths
Upgrade, downgrade and usage-count flows checked for values the client can forge.
Data exposure scan
Public keys, open tables, listable storage and over-shared endpoints, the standard leak surface, checked end to end.
Prioritised report and re-review
Severity-rated findings with fixes, and a free re-test of your patches.
The kind of thing we find
An education platform stored its users' Google authentication tokens in a table readable with the public key. Anyone could lift a token and access those users' accounts elsewhere. Multi-tenant in name, single-tenant in practice, because every tenant could read the lot.
How it works.
- 01
Scope
A walkthrough of your tenancy model and stack sets the fixed quote.
- 02
Test
Live cross-tenant probing plus code review of the boundaries that matter.
- 03
Report
Findings with severity and fix, in about a week, walked through on a call.
- 04
Re-review
We re-run the cross-tenant tests after your fixes. Included.
Common questions.
- What does a SaaS security audit check?
- Tenant isolation first, because it is the highest-impact failure. Then role enforcement, billing and quota integrity, auth flows and data exposure. Every finding comes back severity-rated with a concrete fix.
- We built on Supabase or Firebase. Does the audit cover that?
- Yes. Most SaaS apps we audit run on one of them, and the most common finding is a missing or too-broad row-level rule behind a public key. We check the platform rules and the application code together.
- Can you audit before our first enterprise deal?
- That is one of the most common triggers. A completed independent audit, plus the fixes, is a strong answer to a customer security questionnaire.
- What does it cost?
- From $750, fixed quote up front, re-review included.
Related services.
Let's build something real.
Tell us about your app or idea. You'll get a clear plan and a fixed quote back within 24 hours.