The verdict in three sentences
B2B website security isn't a product you buy once, it's a hardening level you maintain: audit, fix, monitor, then re-test. In 2026, a vulnerability audit costs 1,500 to 6,000 EUR and a full pentest 4,000 to 12,000 EUR, depending on exposed surface. The real stake is the cost of an unprevented breach: regulator notification, a GDPR fine up to 4% of global revenue, and lost trust from enterprise customers.
Audit, pentest, bug bounty: which for what need
These services aren't equivalent and don't target the same maturity level.
| Service | Goal | 2026 cost | Recommended frequency |
|---|---|---|---|
| Vulnerability audit | Automated scan + config review | 1,500 – 6,000 EUR | Yearly |
| Pentest (intrusion test) | Manual exploitation by an expert | 4,000 – 12,000 EUR | Yearly or after a rebuild |
| Code audit | Source code review | 5,000 – 15,000 EUR | Sensitive applications |
| Bug bounty | External researchers, continuous | Budget + bounties 200-5,000 EUR/flaw | High maturity |
For a B2B brochure or institutional site, a yearly audit is often enough. A pentest becomes essential as soon as there's a client area, sensitive forms or payment.
Prioritized hardening: where to spend first
Not all measures have the same protection/cost ratio. Here's the recommended 2026 order.
| Measure | What it blocks | Setup cost |
|---|---|---|
| Updates + removing unused plugins | 90% of opportunistic attacks | Included in maintenance |
| HTTPS + CSP/HSTS headers | Interception, injection, clickjacking | 0 – 500 EUR (config) |
| WAF (application firewall) | SQL injection, XSS, bots | 20 – 200 EUR/month |
| MFA + access management | Admin credential theft | 0 – 300 EUR (setup) |
| Encrypted off-site backups | Ransomware, data loss | Included in maintenance |
| Monitoring + malware scan | Early detection | 30 – 150 EUR/month |
The first line — updates and hygiene — blocks the overwhelming majority of automated attacks and costs the least. Always start there.
The GDPR impact of a breach: the real cost
A personal-data breach triggers heavy obligations and financial risk.
| Item | 2026 order of magnitude |
|---|---|
| Regulator notification (deadline) | 72 h max after discovery |
| Crisis management + forensics | 5,000 – 30,000 EUR |
| GDPR fine | Up to 20M EUR or 4% of global revenue |
| Notifying affected individuals | Variable, mandatory if high risk |
| Lost enterprise contracts | Often the heaviest item |
A 4,000 EUR yearly audit is trivial insurance against these amounts — especially if you sell to enterprises that now demand security evidence in tenders.
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Mini case study
Marc, CIO of a B2B software vendor in Rennes, lost a tender for lack of an up-to-date security report. He orders a 7,500 EUR pentest that reveals a SQL injection on his client portal and missing headers. Fix and hardening: 3,200 EUR, plus a WAF at 90 EUR/month. First-year total: about 11,800 EUR. Result: two enterprise tenders won within six months, one a 140,000 EUR contract — the security investment paid back more than tenfold.
FAQ
Are an audit and a pentest the same thing?
No. An audit scans and checks configuration, often partly automated. A pentest simulates a real attack with manual exploitation by an expert: deeper, pricier (4,000 to 12,000 EUR), but far more revealing.
How often should I audit my site?
At least once a year, and systematically after a major rebuild or adding a sensitive feature (payment, client area). Threats evolve continuously; a one-off audit goes stale.
Is a WAF enough to protect me?
No, it's one layer among several. A WAF filters many automated attacks (20-200 EUR/month) but replaces neither updates, MFA, nor backups. Security is a stack of layers.
What does my company risk in a data leak?
A regulator notification within 72 h, crisis management at 5,000-30,000 EUR, a GDPR fine up to 4% of global revenue, and above all lost customers. Reputational risk often exceeds the fine.
Do enterprises really demand security evidence?
Yes, increasingly: security questionnaires, pentest reports, sometimes certification. In 2026, being unable to answer disqualifies you from a growing number of B2B tenders.
Let's scope your project. Tell us your stack, whether there's a client area or payments, and your deadline: we'll scope the audit and priority hardening. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
