Tenant isolation testing
Proof that one of your customers cannot reach another's data through the UI, API, exports, storage, or background jobs.
The Problem
Your Product Is Multi-Tenant, but Is the Wall Between Tenants Real
A SaaS app serves every customer from the same code and database. The whole trust model rests on one thing: that no tenant can ever see another tenant's data.
Tenant leak
A user guesses an ID and pulls another tenant's data.
Tenant leak
We test every object and export across tenants and prove the wall holds.
Role creep
A trial or basic user reaches a paid-only endpoint.
Role creep
We test each role and plan limit against the API directly.
Shared keys
One API key or token works across several tenants.
Shared keys
We check how keys and tokens are scoped and revoked.
Scan gap
A generic web scan skips the multi-tenant questions.
Scan gap
We test the isolation logic a scanner cannot see.
Your app serves hundreds of customers from one codebase, and each one trusts that their data stays theirs. Then a prospect's security team sends a questionnaire asking how you prove tenant isolation, and you realize no one has tested it. Could a user on one account guess an ID and pull another account's invoice? Does a shared API key leak across tenants? Can a trial user hit a paid-only endpoint? A generic web scan will not answer these. The questions that stall your enterprise deals are the ones a SaaS test is built to answer.
We test your product the way a paying customer turned attacker would. We create accounts in separate tenants, then try to cross the wall between them: through your UI, API, exports, file storage, background jobs, and search. We test every role and plan limit, your SSO and SCIM setup, and how your API keys and tokens are scoped. Then we test the cloud account it all runs in. You get proof for each finding, a fix list, and a summary letter your enterprise buyers can read.
Tenant isolation proven
You see us create separate tenants and cross the wall through your UI, API, exports, and storage.
Roles, SSO, and API keys
We test each role and plan limit, your SSO and SCIM flows, and how API keys are scoped and revoked.
A buyer-ready report
You get proof for each finding, a fix list, and a summary letter your enterprise customers and auditors will accept.
Our SaaS Penetration Testing Process
From Tenant Setup to a Buyer-Ready Report in Five Steps
You approve the scope and roles, give us test tenants, see each finding proven across accounts, and get a fix list plus a summary letter for your buyers.
You tell us your product, its roles and plans, and what triggered the test: an enterprise deal, a questionnaire, or an audit. We agree the scope and testing window. You sign an authorization form, and we lock a fixed price. If a plain web app test is a better fit, we will say so first.
What's Included
What You Get With SaaS Penetration Testing
You get multi-tenant isolation testing, role and plan-limit checks, SSO and API testing, a cloud account review, a fix list, and a buyer-ready summary letter.
Compare Options
DeveloperLook vs an Automated Scanner vs a Large Firm
An automated scanner runs cheaply around the clock, and a large firm carries brand weight for big tenders. Here is where each fits a SaaS test and where it falls short.
| Feature | DeveloperLookBest fit | Automated scanner | Large firm |
|---|---|---|---|
| Starting cost | From $1,400 | Free or monthly | Quoted per engagement |
| Tenant isolation | Tested across accounts | Not understood | Usually tested |
| Role and plan abuse | Every role tried | Rarely caught | Usually tested |
| SSO and API keys | Flows tested by hand | Surface checks | Usually tested |
| Cloud account | Reviewed with the app | Separate tool | Often extra |
| Buyer letter | Included each plan | Not included | Sometimes included |
| Fix help | Fixes explained | Generic advice | Report only |
| Best for | B2B SaaS products | A quick first check | Large tenders |
DeveloperLook
Automated scanner
- Starting cost
- DeveloperLook: From $1,400Automated scanner: Free or monthly
- Tenant isolation
- DeveloperLook: Tested across accountsAutomated scanner: Not understood
- Role and plan abuse
- DeveloperLook: Every role triedAutomated scanner: Rarely caught
- SSO and API keys
- DeveloperLook: Flows tested by handAutomated scanner: Surface checks
- Cloud account
- DeveloperLook: Reviewed with the appAutomated scanner: Separate tool
- Buyer letter
- DeveloperLook: Included each planAutomated scanner: Not included
- Fix help
- DeveloperLook: Fixes explainedAutomated scanner: Generic advice
- Best for
- DeveloperLook: B2B SaaS productsAutomated scanner: A quick first check
Projects We've Built
SaaS Products We Have Built
We design and build multi-tenant SaaS products, so we know where tenancy, roles, and billing logic usually break under real use.
Saasmo Recruiting Software Web Design & Development
- Technology
- HR & Staffing
- SaaS Platform
Oasic Finance SaaS Web Design & Development
- Finance
- SaaS Platform
- Dashboard
Payrole Global Payroll Website Design & Development
- HR & Staffing
- Dashboard
- SaaS Platform
Staffic Time Tracking and Employee Monitoring Software
- HR & Staffing
- SaaS Platform
- Dashboard
What Our Clients Say
What Clients Say After Launch
Feedback from teams we have built and shipped SaaS products for.
We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
What I appreciate most is that the website is actually easy for us to manage now. We can update content ourselves instead of sending a developer a message every time we need to change something small. They also paid attention to the technical SEO side, which mattered to us because we didn’t want a new website to create problems for the traffic we already had. I’ve probably asked more questions than I should have since launch, but every question has been handled patiently and without any fuss. The team is easy to work with, they explain things clearly, and when we need something changed, they focus on getting it done rather than making the process complicated.
1,250+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
1,250+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
Want results like these?
Tell us what you are building. You get a reply within 24 hours on business days, then a written estimate.
Work Culture
Why B2B SaaS Teams Trust Us With a Pen Test
Testing a live SaaS product means working around real customers and real data. These habits keep the test safe and the report useful for your sales team.
We think in tenants
We build multi-tenant products ourselves, so we test the way a real tenant would probe the wall, not the way a generic scanner guesses.
We write for your buyers
Our report includes a summary letter your sales team can send to a prospect's security reviewers, so a test turns into a closed deal faster.
We confirm every break
Each cross-tenant or role finding is proven with a real request and response. You fix a confirmed issue, not a scanner's guess.
We work around real users
We test on your staging or a scoped tenant where we can, and we flag anything that could touch live customer data before we run it.
We tell you what you need
If a plain web app test or an automated scan covers your case, we will say so before we quote. The test should match your real risk.
You own the results
Every report, proof, and letter stays yours to keep and reuse in each enterprise review, during the engagement and after it ends.
Overview
What does SaaS penetration testing cover beyond a web app test?
DeveloperLook provides SaaS penetration testing for B2B software teams facing enterprise security reviews. We create separate tenants and try to cross the wall between them. We test roles, SSO, SCIM, and APIs, and review the cloud account it runs in. Tests start at $1,400, take 2 to 3 weeks, and you get proof, a fix list, and a buyer-ready summary letter.
DEVELOPERLOOK
Project facts · SaaS Penetration Testing
- Service
- Multi-tenant SaaS pen tests with proof and a buyer-ready letter
- Typical timeline
- 1 to 2 weeks for the app, up to 3 weeks with cloud review
- Platforms
- Multi-tenant SaaS on AWS, Azure, Google Cloud, and Shopify apps
- Built with
- Burp Suite, the OWASP testing guide, Postman, and Python scripts
- Experience
- 10+ years of development experience and 1,250+ shipped projects
- Post-launch support
- 60 days of support after the report
- Communication
- Calls in US, UK, and AU business hours
- Starting price
- From $1,400 USD, fixed scope after a free scoping call
Reviewed 27 Oct 2026 by Saimul Islam
Good fit
B2B SaaS teams chasing enterprise deals
You are moving upmarket, and a prospect's security team wants proof of tenant isolation before they will sign.
SaaS founders answering questionnaires
You keep getting security questionnaires that ask about pen testing, and you want a real test and a letter, not a maybe.
Regulated SaaS companies
You handle health, finance, or personal data, and you need a yearly test on file for your customers and auditors.
Teams after a tenancy scare
Your customer saw data that was not theirs, or your team found a near miss, and you want every isolation path tested before the next one.
Product teams adding SSO or an API
You just shipped SSO, SCIM, or a public API, and you want the new surfaces tested before enterprise customers lean on them.
Not a fit
Single-tenant web app
Your product is a single-tenant web app or store, not multi-tenant SaaS. Our Web Application Penetration Testing Services page is the right fit.
Ongoing testing
You want testing on every release, not a one-time test. Our Penetration Testing as a Service page runs that cadence for you.
Compliance readiness
You need SOC 2 controls and evidence built, not just a test. Our SOC 2 Compliance Services page covers that program.
Budget under $1,400
Your budget is under $1,400, or your product is a simple single-tenant tool. A plain web app test is a better spend.
Not sure we're the right fit?
Book a free call or message us. We'll tell you honestly whether we're the right team.
Pricing
Transparent Starting Prices for SaaS Penetration Testing
These are starting points in USD. Your price depends on how many roles and tenants are in scope and whether the API and cloud account are included. You get a fixed proposal after a free scoping call.
For Agencies
White-Label SaaS Penetration Testing for Agencies and Studios
You own the client relationship. We supply the SaaS testing under your brand: tenant isolation, role and API testing, and a report your account team can present. Studios that build SaaS can offer a real pen test without staffing a testing team in house.
How the partnership works
White label: your client only ever sees your brand
Your clientSees only your brand
You, the agencyOwn the relationship
DeveloperLookBehind your brand
Share the product
You hand over the client product, its roles, and the rules of engagement.
- Client needs
- You share the details
- Details received
We test and prove
We test tenancy, roles, and APIs, and prove each finding with evidence.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
You present results
Your team sends the report and buyer letter to the client as your own.
- Done by our team
- Your brand on it
- Handed to your clientDone
- Your client
- You, the agency
- DeveloperLook
Share the product
You hand over the client product, its roles, and the rules of engagement.
- Client needs
- You share the details
- Details received
We test and prove
We test tenancy, roles, and APIs, and prove each finding with evidence.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
You present results
Your team sends the report and buyer letter to the client as your own.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
The Right Technology for Your Project
Technology Stack
We test with the tools SaaS teams know and report in formats your engineers and your prospects' security teams can both act on.
Burp Suite
OWASP- Postman
- Nuclei
Python
React
Node.js
Next.js
Laravel
PostgreSQL
GraphQL
OpenAPI- Okta
- Auth0
- OpenID Connect
AWS
Microsoft Azure
Google Cloud
Docker
Cloudflare
01 / 04
Related Services
Services SaaS teams often add: the security hub, ongoing testing, enterprise readiness, SOC 2, and product development.
Web Application Penetration Testing Services
DeveloperLook offers Web Application Penetration Testing Services for stores, SaaS products, and custom apps: hands-on testing of logins, roles, checkout logic, APIs, and cloud settings, with proof for each finding, a fix list, and a retest.
Penetration Testing as a Service
DeveloperLook runs penetration testing as a service for product teams on a monthly rhythm. Each cycle is scoped from what you shipped, tested by hand, and filed as tickets in your own tools, with a quarterly report for customers and auditors.
SCIM Provisioning for SaaS Apps
DeveloperLook builds SCIM provisioning for SaaS apps that sell to enterprise customers. We add user and group endpoints, role mapping, and safe deactivation, then test with Okta and Entra ID. A clean SCIM integration ends manual user admin for good.This page
SaaS Penetration Testing
Pairs with the 6 services around it
SOC 2 Compliance Services
DeveloperLook provides SOC 2 compliance services for SaaS and B2B companies whose customers ask for a report. We assess gaps against the Trust Services Criteria, build controls in your cloud and code workflow, and prepare the evidence your CPA firm will test.
Cybersecurity for Startups
DeveloperLook provides cybersecurity for startups that have customers but no security hire. We audit your cloud, code, logins, and laptops, fix the gaps in tools you already pay for, and hand you a roadmap from your first enterprise deal to SOC 2.
Cybersecurity Services
DeveloperLook provides cybersecurity services for businesses without a security team. We assess identity, email, devices, cloud, and web apps, fix the gaps you approve, and recheck every fix, so you get a cybersecurity service provider that does the work.FAQ
Frequently Asked Questions
Straight answers on cost, timing, multi-tenant testing, and the report your buyers get.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
SaaS penetration testing starts at $1,400 for the core app and tenant isolation with up to two roles. Adding API testing, SSO and SCIM checks, and more roles runs $3,400. A full test with a cloud review and two retests starts at $6,400. You get a fixed quote after a free scoping call.
Most SaaS tests take 1 to 2 weeks for the app and tenancy, including hands-on testing. Adding the API and a cloud account review takes up to 3 weeks. The time depends on how many roles and tenants are in scope. The retest happens once your team has shipped the fixes, usually within 60 days.
It is an authorized test of your multi-tenant software product, focused on proving your customers stay walled off from each other. A penetration testing SaaS engagement checks tenant isolation, roles, SSO, and APIs. Also called a SaaS pentest or SaaS application pentest, it goes past a generic web scan to the logic that keeps your tenants apart.
We create accounts in separate tenants, then try to cross the wall between them. We swap IDs in your UI and API, pull exports and files, trigger background jobs, and run searches, looking for any path to another tenant's data. Every crossing is proven with a real request and response, so a penetration testing for SaaS result is proof, not a guess.
Yes. We test your SSO and SCIM flows for ways to join the wrong tenant, skip checks, or keep access after removal. We check how API keys and tokens are scoped, whether one works across tenants, and how they are revoked. A SaaS penetration test that skips auth and provisioning misses where enterprise accounts break.
A web app pen test covers one application's logins, inputs, and logic. A SaaS test adds the multi-tenant questions: can one customer reach another, can a role or plan be bypassed, and do SSO and API keys leak across accounts. For a single-tenant app, a web app test is enough. For multi-tenant SaaS, you need both.
Ask whether they understand multi-tenancy, confirm findings by hand, and write a letter your buyers can use. Many pentest SaaS vendors run a generic scan and skip isolation. We build SaaS ourselves, test the wall between tenants directly, and deliver a report your sales team can hand to a prospect.
Yes, on the full plan. We review the AWS, Azure, or Google Cloud account your product runs in for exposed storage, over-broad roles, and missing logging. A cloud gap can undo tenant isolation at the app layer. You get the app, the API, and the cloud reviewed together, with findings in one ranked list.
At least once a year, and again after a big change to tenancy, auth, or your API. Our annual penetration testing services for regulated SaaS companies run on a yearly cadence, so each enterprise review and audit finds a current report on file. Between tests, scheduled scanning catches new exposure as it appears.
Yes. Every plan includes a summary letter your sales team can send to a prospect's security reviewers, plus a full technical report for your engineers. Both are yours to keep and reuse in each security review. You own every proof and finding, during the engagement and after it ends.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
Free 30-min callGoogle Meet
Book a call
Book a free 30-minute call
In 30 minutes on Google Meet we walk you through how we would build it, how long it takes and what it costs. Then you get a written estimate.
Calendar not showing? Book on cal.com or send a brief.