Web App Security Audit in Montreal: 2026 Cost

The verdict in three sentences

A serious security audit is not an automated scan: it is a manual OWASP-based pentest with real exploitation of flaws and a prioritized remediation report. In Montreal in 2026, budget 4,500 to 20,000 EUR depending on app size. The real risk is elsewhere: a personal-data leak triggers your privacy liability and can cost far more than the audit.

Price of a security audit in Montreal in 2026

Price depends on the number of features, code volume, scope (app only, API, infrastructure) and test level (black, grey or white box). Here are the 2026 ranges.

The report is not enough: you must fix. Remediation often represents 30 to 60% of the audit budget depending on the number of critical vulnerabilities.

What a real OWASP audit covers

A credible audit tests at minimum the OWASP Top 10 categories: injections, broken authentication, sensitive-data exposure, misconfiguration, broken access control, vulnerable components. Each flaw is scored by criticality with proof of exploitation.

An audit without proof of exploitation and a prioritized remediation plan is just a scan: it reassures on paper but does not reduce real risk.

Mini case study

Sophie, IT director of an e-health SMB in Montreal, hosts health data on 12,000 patients. She hesitates between doing nothing and ordering an audit at 11,000 EUR (app + API pentest, grey box).

The audit reveals 3 critical flaws, including an access-control gap letting one read other patients' records. Remediation: 6,000 EUR. Total: 17,000 EUR.

Against that, a health-data breach notification triggers investigation, mandatory notice to all 12,000 people, loss of trust and potential penalties. Privacy fines can reach 4% of annual revenue. For an SMB at 3M EUR revenue, that is up to 120,000 EUR, before legal costs and reputation. The audit is insurance at under 15% of the maximum risk.

FAQ

How much for a first serious audit? Budget 4,500 EUR for an express audit and 8,000 to 14,000 EUR for a standard app pentest covering the app and its API. Below 4,000 EUR, it is usually just an automated scan.

How long does an audit take? Between 3 and 18 days of testing depending on scope, plus about a week for the report. Remediation then adds a few days to a few weeks depending on the flaws.

How often should you audit an app? At least once a year and systematically after any major change. A follow-up audit often costs 15 to 25% less than the first.

Does the audit cover privacy compliance? A security audit reduces technical risk, but compliance adds data mapping, a register and organizational measures. Budget 9,000 to 16,000 EUR for a dedicated compliance audit.

What happens if critical flaws are found? You receive a prioritized remediation plan. Critical flaws must be fixed first (often within 30 days), followed by a re-audit at 1,500-4,000 EUR to validate the fixes.

Let's scope your project. Tell us your app's nature, the volume of personal data processed and your deadline, and we will frame the right pentest and remediation. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.