The verdict in three sentences
A custom document-management extranet (DMS) in Amsterdam runs 40,000 to 95,000 EUR for the platform, plus 6,000 to 13,000 EUR for versioning and audit trail and 3,000 to 9,000 EUR for eIDAS e-signature. The tool is justified for a firm sharing confidential deliverables with fine-grained per-matter rights. Expect 9 to 13 weeks and maintenance of 700 to 1,800 EUR/month.
Pricing a secure DMS
A custom DMS goes well beyond a shared Drive: it manages rights per folder and per role, logs every access and guarantees version integrity, making it a compliance tool as much as a collaborative one.
| Module | 2026 range (EUR) | Function |
|---|---|---|
| Base DMS extranet | 40,000 - 60,000 | Upload, sharing, per-folder rights |
| Advanced version | 60,000 - 95,000 | + full-text search, workflows |
| Versioning + audit trail | 6,000 - 13,000 | History, access log |
| eIDAS e-signature | 3,000 - 9,000 | Qualified/advanced signature |
| Digital vault | 5,000 - 12,000 | Evidential archiving |
| Approval workflow | 4,000 - 10,000 | Sign-off circuits |
Amounts = 2026 order of magnitude for a Dutch consultancy or regulated profession.
Secure hosting and recurring costs
For confidential documents (contracts, client data), hosting and security weigh more than for a standard site: this is the line not to underestimate.
| Line item | 2026 range | Note |
|---|---|---|
| Hosting EU ISO 27001 | 160 - 520 EUR/month | Certified, encryption at rest |
| Maintenance | 700 - 1,800 EUR/month | Fixes, changes |
| Developer day rate | 450 - 700 EUR | By seniority |
| Initial security audit | 3,000 - 9,000 EUR | Pentest, GDPR review |
| Total timeline | 9 - 13 weeks | Signature included |
eIDAS e-signature gives legal value to documents signed in the EU, essential for contracts and binding deliverables.
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Mini case study
Claire, director of an Amsterdam consultancy (25 consultants, 300 client matters/year), commissions a DMS extranet at 58,000 EUR + versioning/audit at 10,000 EUR + eIDAS signature at 7,000 EUR, so 75,000 EUR, maintenance 1,200 EUR/month and ISO 27001 hosting at 350 EUR/month. Before, sending, tracking and signing deliverables took about 3 hrs per matter (emails, chasing, PDF round-trips). The extranet cuts this to 1 hr per matter: 2 hrs saved x 300 matters = 600 hrs/year. At 60 EUR/loaded hour for a consultant, that is 36,000 EUR/year of billable time freed: the initial budget pays back in under two years, with security and professional image as bonuses.
FAQ
Isn't a shared Drive enough? For non-sensitive documents, yes. Once you have confidential contracts, per-folder rights and a need for traceability, a custom DMS (from 40,000 EUR) offers security and an audit trail a Drive cannot guarantee.
Is eIDAS signature legally recognised? Yes: the eIDAS regulation governs e-signature in the EU. A qualified signature has the same value as a handwritten one, securing contracts and deliverables.
What does the audit trail add? It logs who viewed, downloaded or edited each document and when. It is essential for compliance audits and disputes. Budget 6,000-13,000 EUR with versioning.
Why ISO 27001 hosting? For sensitive data, certified hosting (160-520 EUR/month) guarantees encryption, backups and compliance. It is a mark of seriousness expected by your enterprise clients.
How long to deploy? From 9 to 13 weeks depending on modules, with e-signature and audit trail the components to integrate early.
Let's scope your project. Describe your document types, user count and security requirements: we'll price a compliant DMS extranet in Amsterdam. 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.
