Web App Security Pentest Cost (2026)

The verdict in three sentences

A B2B web app pentest costs 4,000 to 15,000 EUR in 2026 depending on surface and test depth. It's not a compliance expense but a sales accelerator: enterprise buyers demand security proof before signing. A clean pentest report unblocks stalled deals and shortens sales cycles.

What a pentest costs in 2026

Price depends on scope (number of endpoints, roles, APIs), depth (black, grey, white box) and whether a re-test after remediation is included.

A grey-box pentest (with test accounts) offers the best coverage-to-cost ratio for a B2B application.

The OWASP Top 10: what the test covers

The reference standard remains the OWASP Top 10. A good pentest systematically checks these categories and prioritizes remediation by criticality.

Remediation often equals the pentest budget itself: expect 3,000 to 12,000 EUR depending on the number and severity of findings.

The ROI: shortened sales cycles

In B2B, security has become a buying criterion. Enterprise buyers send security questionnaires (sometimes 100+ questions) and often require a recent pentest report. Without it, the deal stalls in procurement or IT. With a clean report and a remediation plan, you answer in days instead of weeks, and reassure the decision-maker. The pentest pays for itself with the first unblocked contract.

Mini case study

Thomas, IT director of a 30-person B2B SaaS vendor in Bordeaux, has three enterprise deals stuck on security. He orders a grey-box pentest (app + API + SSO): 10,000 EUR, plus 6,000 EUR remediation and 2,500 EUR re-test, so 18,500 EUR. Result: a clean report and a security questionnaire filled in 2 days. The three deals, worth a combined 140,000 EUR/yr in subscriptions, unblock within 6 weeks. Immediate and lasting ROI.

FAQ

Black, grey or white box: which to choose?

Grey box (with test accounts, no source code) offers the best balance for a B2B app. White box (with code access) is more exhaustive but pricier, reserved for critical applications.

How often should a pentest be redone?

At least once a year, and after any major change (new sensitive feature, redesign, migration). Enterprise buyers often ask for a report under 12 months old.

Does the pentest include fixing the flaws?

No, the pentest identifies and prioritizes vulnerabilities. Remediation is a separate, often equal budget: 3,000 to 12,000 EUR by severity. The re-test then validates the fixes.

What is an enterprise security questionnaire?

An assessment form sent by the buyer, sometimes 100+ questions on your practices (encryption, backups, GDPR, pentest). A recent pentest report lets you answer fast and reassure.

Does a small SaaS really need a pentest?

As soon as you target enterprise clients or handle sensitive data, yes. It's often the condition to sign. Better to anticipate it than be blocked at the end of a sales cycle.

Let's scope your project. Tell us your application (endpoints, roles, API, SSO) and your sales stakes: we'll scope a pentest between 4,000 and 15,000 EUR with a remediation plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.