Your app is either vulnerable or it isn't.Find out in minutes.
Built for B2B SaaS teams that need evidence when a security questionnaire, a compliance deadline, or a reported vulnerability can't wait. We test your app the way a real attacker would — and give you a report proving exactly what's exploitable.
GET /api/orders/2 -> 200 OK (expected 403)
9.1
CVSS
What to expect
Attack techniques covered
Product experience
No finding enters the report without proof
Most scanners report possibilities. Nautillo reports validated exploits with reproducible HTTP evidence and remediation guidance.
Authorization first
Authorization confirmed and typed consent captured before any simulation begins.
Goal-driven
Pursues attacker goals and records the path, not just a list of issues.
Actionable output
Proof of impact with concrete steps your team can reproduce and fix.
IDOR: Unauthorized order access
Broken Access Control - A01:2021
9.1
CVSS 3.1
GET /api/orders/4821 HTTP/1.1
Authorization: Bearer <attacker_token>
HTTP/1.1 200 OK <- should be 403
{ "id": 4821, "total": 12400, "client": "Acme" }
Attack chain
Trust and controls
Built to stand up to security review
Nautillo Pro is designed for authorized testing, reproducible evidence, and the controls buyers ask for before they approve a new security tool.
Scoped and authorized
Typed consent, audit logging, authorization checks, and non-destructive defaults keep simulations controlled.
Evidence you can review
Confirmed findings include HTTP proof, reproducible steps, and compliance-ready exports.
Buyer-ready security basics
DPA, retention controls and documented platform security are available before procurement starts.
Why we built this
“The difference wasn't skill. It was proof.”
A bug bounty researcher found a critical exploit in 6 minutes that a €15,000 pentest missed — one HTTP request returning 200 OK where there should have been a 403.
The story behind the proof-first approach
We built the tool we wished we'd had before that invoice arrived. Automation proves what's exploitable. Your pentest team fixes what's worth paying for.
How it works
3 steps from release to proof
Web apps only. Black-box only. Non-destructive by design. Primary focus: authentication, access control, exploit confirmation, and regression detection on every release.
Confirm authorization
Confirm you have authorization for the target and provide typed consent before any simulation runs. We recommend starting with a staging environment.
Typed consent - AUP agreementSet attack constraints
Choose the attacker goal and apply scope + non-destructive guardrails.
Rate-limited - non-destructiveReview proof and rerun after each release
Get multi-step attack chains with HTTP proof. Rerun after fixes and before audits - regressions surface the moment they reappear, not months later.
HTTP PoC - CVSS 3.1 - every deployCommon questions
Before you run your first simulation
No. Every simulation is non-destructive by design — no data is written, modified, or deleted. Requests are rate-limited and scoped strictly to the target you authorize. You can also run against a staging environment if you prefer.
Nothing. Enter a URL, confirm you have authorization for the target, and launch. No agents, no browser plugins, no code access required.
Scanners flag possibilities — most of which are false positives. Nautillo Pro only reports findings it can prove, with the exact HTTP request and response showing the exploit worked. If it's in the report, it's real.
That's the goal. You get a clean timestamped report confirming which attack paths were tested and none confirmed — useful evidence for audits and customer security reviews.
Simulations run only against the domain you specify and authorize. Your application data is not exfiltrated — the scanner sends HTTP probes to your target and stores confirmed findings securely in your Nautillo Pro account. Authorization is captured before each run and retained in a full audit log per simulation.
Yes. Supply a bearer token, API key, or session cookie — or provide login credentials and the scanner logs in for you. Tests for IDOR, privilege escalation, and access control failures then run inside the authenticated session, where the most critical findings typically live.
No. The platform guides you through scope, authorization, and constraints. Findings come with plain-English descriptions, reproduction steps, and fix guidance any developer can act on.
Who it's for
Built for teams that ship and need proof every time
Engineering leaders, developers, and security teams use Nautillo Pro to keep coverage current across every release, fix, and certification checkpoint.
Dev Teams
Find what changed since the last release.
Run attack simulations after releases, before launches, and after fixes. Clear the issues your engineers can reproduce and fix fast - without waiting for a scheduled assessment.
< 3 min
from URL to first confirmed finding with HTTP proof
Automated AI security testing
No DAST platform automates prompt injection testing with confirmed, HTTP-proof findings. Nautillo Pro discovers your AI endpoints and runs structured attack goals against them - delivering confirmed exploits, not theoretical warnings.
- Discovers chat, completion, and document-processing endpoints automatically
- Runs G1-G5 payload goals: system prompt disclosure, policy bypass, user PII extraction, cross-tenant data, tool abuse
- Stops after first confirmed proof - no noise, just the exploit path that worked
- Precision AI surface detection - skips non-AI pages to avoid false positives
vs manual penetration testing
Cost, speed, and coverage - compared
Manual pentests go deep on business logic and compliance mandates. Nautillo Pro runs in minutes, ships with every release, and delivers HTTP proof your team can act on immediately.
Cost per assessment
EUR 4,000-EUR 25,000
per manual pentest engagement
EUR 0-EUR 149 / month
single-URL free - full-domain from EUR 149/mo
Time to first finding
1-3 weeks
scope -> engagement -> report
3-15 minutes
scope -> scan -> HTTP proof
How often you can run it
Quarterly at best
point-in-time snapshot
Every deployment
continuous regression coverage
Manual pentest cost and timeline figures reflect typical mid-market web application engagements. Nautillo Pro scan times are based on average single-URL scan completion. Frequency comparison assumes a quarterly pentest schedule.
Plans
Choose the plan that matches how often your app changes
Start free for critical flows. Upgrade when you need repeat coverage between releases, pentests, and certification checkpoints.
Starter
FreeNo credit card required
3 single-URL simulations/mo
1 seat - PDF with attack chains - 30-day retention
Professional
Most popularFirst 6 months - then EUR 69/mo
200 single-URL simulations/mo
4 full-domain simulations/mo
10 seats - injection, auth and credential testing - PDF + JSON - up to 12-month retention
Business
Full coverageFirst 6 months - then EUR 149/mo
Unlimited simulations per verified domain
30 full-domain simulations/mo
CI/CD API — GitHub Actions integrationAI-assisted exploration - unlimited seats - up to 24-month retention
Find your fit
What kind of security testing do you need?
Five questions. We'll tell you which approach fits and whether Nautillo Pro is the right tool.
DAST for dev teams - no agents - no security team required
Question 1 of 5
What do you need to test?
Compliance prep
Map technical findings to the controls you need to prepare
When a finding comes back confirmed, we map it to the relevant control language so your team can prepare evidence before the next audit, customer review, or recertification checkpoint.
PCI DSS 4.0
Payment security preparation
- Req 6.5.1 - Injection flaw prevention
- Req 8.6.1 - Credential hardening
- Req 11.3.1 - External penetration testing
- Req 6.4.3 - Access control validation
SOC 2 Type II
AICPA Trust Services Criteria
- CC6.1 - Logical access security
- CC6.3 - Role-based access enforcement
- CC6.6 - Network access restrictions
- CC7.2 - Threat and anomaly detection
GDPR Article 32
EU data protection preparation
- Art.32(1)(a) - Pseudonymisation and encryption
- Art.32(1)(b) - Confidentiality and integrity
- Art.32(1)(d) - Regular testing and evaluation
- Art.25(2) - Data protection by default
ISO 27001:2022
Information security control mapping
- A.12.6.1 - Technical vulnerability management
- A.14.1.3 - Application transaction security
- A.14.2.8 - System security testing
- A.14.3.1 - Protection of test data
Supporting evidence for audits and compliance programs - not certification, attestation, or a replacement for required manual pentesting. Consult qualified compliance professionals for specific requirements.
Ready to test attacker behavior
Run proof-based simulations on every release
Paste a URL. Run a proof-based simulation after releases, after fixes, and before the next certification checkpoint. You will see exactly what changed and how it was proven.