For SaaS teams shipping complex products

We hack your product. Before attackers do.

Security-driven testing for modern SaaS products across apps, APIs, workflows, cloud, and AI features. We find real attack paths, document how they work, and give your engineers evidence they can fix.

Fixed-scope testing, clear pricing, and no surprises for your team.

10+ years in product security ·700+ engagements ·5,000+ vulnerabilities found

Trusted by engineering-led teams at

Most pentests stop where real product risk starts

Traditional VAPT often tests one slice of the system at a time: the app, the API, or a checklist of known issues. Modern SaaS products do not fail in isolated slices. The real risk lives in how user workflows, APIs, access control, cloud-connected systems, and AI features connect.

Appsecco tests those paths the way attackers do. We follow how small weaknesses chain into real impact, then document what your team needs to fix first.

What We Test

The connected systems attackers actually move through

We do not treat your product as a single app. We test the systems around it, the boundaries between them, and the ways one weak point turns into broader access.

Input validation & injection

SQLi, XSS, GraphQL injection, type confusion
Server/JSON/XML parsing edge cases

Auth & Authorization (IDOR/tenant walls)

Token/session weaknesses, cookie/bearer checks
Cross-user/tenant data access and privilege escalation

Business logic abuse

Out-of-order flows, step skips, misuse of legit features
Multi-step chains that create real impact

API abuse & protocol confusion

Method confusion, verb tunneling, header tampering
Spec deviations that let attacks slip through

Client-side & JS risks

DOM sinks, reflection, unsafe storage
CORS and content-type inconsistencies

Enumeration, rate-limits & resilience

Endpoint discovery, hidden routes, GraphQL introspection
Brute-force/automation throttling checks

See full scope and deliverables

What You Get

Clear findings. Real evidence. Fix guidance your engineers can use.

Every engagement ends with a report built for both engineering and leadership. Each finding includes evidence, reproduction steps, impact, and remediation guidance so your team can validate the issue, fix it, and close it with confidence.

Prioritized by real-world impact

Each issue is ranked by what an attacker could actually do with it, so your team knows what to fix first and why it matters.

Evidence and reproduction steps

Every finding includes proof, request and response details where relevant, and clear reproduction steps. Nothing is left ambiguous.

Fix guidance for engineers

Remediation advice written for your engineering team — specific to your stack, not generic best practices copied from a template.

Executive summary

A concise overview of the most important risks, what they mean, and what to do next — written so leadership can use it without a translation layer.

Retest verification

After your team applies fixes, we retest to confirm the issues are resolved and document the result for your records.

See a sample report

10+

Years testing real product risk

150+

Organizations supported

5,000+

Vulnerabilities uncovered

700+

Security engagements

Our technical depth is backed by public research and open-source labs, including cloud security training (949+ GitHub stars) and the MCP security lab (157+ GitHub stars).

Proof and Trust

Trusted by teams that need more than a checkbox pentest

Clients come to Appsecco when they need real attack-path testing, clear reporting, and findings their engineers can act on without a meeting to decode the report.

Select customers shown with permission. Additional references available under NDA.

The kind of vulnerabilities they found were things we never expected — things which were not on our radar. That changed how we think about our own attack surface.

Found multiple interesting exploitable vulnerabilities across our product. Clear reporting, thorough walkthroughs of each finding, and they stayed engaged until every issue was resolved.

We engaged with Appsecco for red teaming. Their findings were specific, well-documented, and gave our team a clear path to remediation.

Want to speak with a past client in your industry? We can arrange a reference call under NDA.

How Buying Works

Clear scope. Fixed price. No surprises.

You will know what we are testing, what it costs, and when it will be delivered before any work begins.

Discussion

We talk through your product's architecture, what you're most concerned about, and what's been tested before. 30 minutes, no commitment.

Scoping & fixed quote

Within 48 hours, you get a written scope, fixed price, and confirmed delivery date. No hourly billing, no ambiguity.

Testing

Our team tests independently — no engineering time required during the engagement. We work from a staging environment or scoped production access that you configure once, before testing begins.

Review & handoff

You get a detailed report with evidence, repro steps, and developer-ready fixes. Revalidation is included at no extra cost — use it whenever your team is ready, within 30 days of delivery.

Start a conversation

No-pressure intro call

Quote in 48 hours

Fixed price before kickoff

Revalidation included

Pricing

Fixed pricing for security-driven testing

We price by product surface area, not hours. The price is fixed before work begins, and the proposal is simple enough to forward directly to procurement.

How pricing works

We price by product complexity, not hours. A single slab is $3,500. The number of slabs depends on your product's surface area: how many critical flows, API endpoints, cloud environments, and auth models we need to cover.

The formula is straightforward: price = slabs × $3,500. No hourly rates, no variable fees, no surprises on the invoice. The same number you see in the proposal is the number you pay.

How buying works

1 Discovery call — We review your product's scope together and confirm the slab count. No commitment required.
2 Fixed quote — You receive a one-page proposal with exact price, scope, and delivery date. Ready for procurement.
3 Testing + report — We test, deliver findings, and include revalidation at no extra cost.

Fixed price confirmed before any work begins

One-page proposal ready for procurement review

Revalidation always included in the quoted price

Custom terms for projects > $10k; annual contracts available

Pricing FAQs

When you are ready

Start with a technical conversation.
No commitment required.

Tell us what you are building and where you think the risk might be. We will explain what we would test, answer your questions, and provide a fixed quote if you want one.