The verdict in three sentences
In 2026, a secure extranet for an SME ranges from 20,000 to 60,000 EUR, depending on document volume, number of partners and required security level. The line items that inflate the budget are MFA, encryption, audit logging and EU hosting. A penetration test before go-live adds 3,000 to 9,000 EUR but prevents far more costly incidents.
What a secure extranet is, and why the price varies
An extranet is a private space where your partners (customers, suppliers, subcontractors) access documents and data you choose to share. Security is not optional: these are often contracts, prices, drawings or personal data. Here are the building blocks and their 2026 order-of-magnitude cost.
| Building block | Scope | Cost 2026 (EUR) |
|---|---|---|
| Authenticated core | Login, MFA, reset | 4,500 - 9,000 |
| Access rights | Groups, folders, targeted sharing | 4,000 - 8,500 |
| Document vault | Upload, versions, preview | 4,500 - 10,000 |
| Encryption at rest & in transit | TLS, storage encryption | 2,000 - 5,000 |
| Audit logging | Access traces, exports | 2,500 - 6,000 |
| Partner portal | Dashboard, notifications | 3,000 - 7,000 |
A simple document extranet for around ten partners starts near 20,000 EUR. With granular rights, auditing and integrations, it reaches 45,000 to 60,000 EUR.
How security drives the budget
Security and compliance requirements are the main price factor. Here is how each level flows through to the final budget.
| Security requirement | Budget impact | Recommended for |
|---|---|---|
| Mandatory MFA | +1,200 to +3,000 EUR | All extranets |
| End-to-end encryption | +2,500 to +6,000 EUR | Sensitive data |
| Full GDPR logging | +2,500 to +6,000 EUR | Personal data |
| EU hosting + data residency | +1,500 to +4,000 EUR/yr | GDPR compliance |
| Penetration test | +3,000 to +9,000 EUR | Before go-live |
| SLA & 24/7 monitoring | +3,000 to +7,000 EUR/yr | Critical extranet |
Mini case study
Sonia, head of an engineering consultancy in Lyon, exchanges confidential drawings and reports every week with 25 partners over email, with heavy attachments and zero traceability. She invests 32,000 EUR in an extranet with MFA, per-project rights, audit logging and EU hosting. The result: no more documents sent by mistake, an estimated 6 hours/week saved on file handling (about 15,000 EUR/year), and a compliance argument that helped win a 180,000 EUR tender. The project pays back in a little over two years on administrative savings alone.
FAQ
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What is the difference between an extranet and a shared Drive?
An extranet offers granular per-partner rights, access logging, your branding and integration with your tools. A shared Drive traces nothing and mixes partners. For serious B2B, the security gap justifies the investment.
Is a penetration test really necessary?
For any extranet handling sensitive data, yes. A 3,000-9,000 EUR pen test costs far less than a data breach, whose average cost runs into tens of thousands of euros.
Where should data be hosted for GDPR compliance?
Within the European Union, with a provider committing to data residency. Budget 1,500 to 4,000 EUR/year depending on volume and service level.
How much is annual maintenance?
Plan for 12 to 18% of development cost per year, covering security updates, monitoring and small improvements.
Can the extranet connect to our internal tools?
Yes, via API: ERP, DMS, CRM. Each integration adds 2,500 to 9,000 EUR depending on complexity, but eliminates double entry.
Let's scope your project. Tell us the number of partners, document types and your security requirements, and we will frame an extranet between 20,000 and 60,000 EUR. 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.
