Web app penetration test before launch in Miami: price and method (2026)

The verdict in three sentences

For a Miami startup launching a B2B platform that must hand a penetration test report to its first enterprise customers, a grey-box pentest (OWASP Top 10 and API) costs, as a 2026 order of magnitude, USD 4,400 to 13,200 for 5 to 10 days of testing. You must also budget USD 2,200 to 8,800 for fixes and a retest, otherwise the report delivered to the customer shows open vulnerabilities. To sell to public agencies or regulated buyers, a tester with recognized accreditation (CREST, or a firm already accepted by FedRAMP or SOC 2 auditors) costs 20 to 40 % more but avoids redoing the audit.

What a pentest costs depending on scope

Price depends mainly on the number of user roles, screens and API endpoints to test. A serious quote starts with a scoping questionnaire, not a flat fee.

Grey box, where testers get accounts for every role, is the format B2B buyers expect: it exposes cross-tenant access control flaws, the leading cause of data leaks on multi-tenant platforms.

Recurring flaws and what they cost to fix

On a young platform, the same categories of vulnerabilities come up almost every time. Fixing them is rarely complex, but it must be planned before launch day.

With a developer at USD 550 to 720 a day, these fixes add up to USD 2,200 to 8,800. Kolonell includes these fixes in its application security engagements: code review, hardening and retest preparation.

Preparing the pentest for a useful report

A test run on an unstable build produces a report that is obsolete within two weeks. The right method takes a few steps.

The attestation letter is the document procurement teams actually ask for: one page summarizing scope, date and the absence of open critical findings. The full report stays confidential and is shared under NDA.

Mini case study

Ethan, CTO of a B2B startup in Miami (fictional profile), must sign a first enterprise customer worth USD 198,000 a year, conditional on a pentest. He budgets a grey-box test at USD 8,800, USD 5,500 of fixes and USD 1,650 for the retest, i.e. USD 15,950. That is 8 % of the first annual contract. Without a report, signature slips by at least a quarter, i.e. USD 49,500 of delayed revenue. The pentest pays for itself at signature and can be reused with the next 3 or 4 prospects for 12 months.

FAQ

Do we need an accredited provider?

Not for most private customers, who only want a serious report and a documented method. For a public agency or a regulated buyer, accreditation is often required and justifies a 20 to 40 % premium.

How often should we redo a penetration test?

At least once a year, and after every major change (new payment module, new roles). Many enterprise contracts require a report less than 12 months old.

Can we test directly in production?

It is possible but risky: an injection test can corrupt real data. An identical staging environment often costs less than USD 110 a month in hosting.

Is an automated scanner enough?

No, a scanner at USD 0 to 330 a month finds known flaws but misses business logic issues such as access to another customer's data. It complements the annual pentest without replacing it.

How long before launch should we plan?

Allow 6 to 8 weeks: 2 weeks of scoping, 2 weeks of testing, then 2 to 4 weeks of fixes and retest. Reputable providers are often booked 3 to 4 weeks ahead.

Let's scope your project. Describe your platform, its roles and your launch date: we price the test scope, the fixes and the timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.