The verdict in three sentences
A B2B extranet (reseller, partner or distributor portal) in Berlin costs between EUR 25,000 for a 2-3 role version and EUR 90,000 for a platform integrated with the ERP including catalogue, orders and custom pricing. The budget is driven by three levers: the number of roles and permissions, the integrations (ERP, PIM, carriers) and the security level required. Expect 12 to 28 weeks of delivery depending on integration depth.
Cost grid per functional block (Berlin, 2026)
A B2B extranet breaks down into blocks. Here are the 2026 ranges in EUR for an experienced Berlin provider.
| Functional block | 2026 range (EUR) | Timeline |
|---|---|---|
| Role and permission management | 4,000 - 9,000 | 2-3 weeks |
| Product catalogue + per-client pricing | 6,000 - 15,000 | 3-5 weeks |
| Order entry + B2B cart | 7,000 - 16,000 | 3-5 weeks |
| ERP integration (Sage, SAP, Odoo) | 8,000 - 25,000 | 4-8 weeks |
| Order tracking + billing | 5,000 - 12,000 | 2-4 weeks |
| Document space + RMA | 3,000 - 8,000 | 2-3 weeks |
A launch version (roles + catalogue + ordering) runs around EUR 28,000 to 40,000. Adding real-time ERP integration tips the project towards EUR 60,000 - 90,000.
ERP integration: the item that swings the price
The difference between a EUR 30,000 and a EUR 90,000 extranet lies almost entirely in the integration with the information system. Three 2026 scenarios.
| Integration scenario | 2026 cost (EUR) | Complexity |
|---|---|---|
| Scheduled CSV export/import (batch) | 4,000 - 8,000 | Low |
| Standard ERP REST API | 10,000 - 18,000 | Medium |
| Real-time middleware + PIM | 20,000 - 30,000 | High |
| Proprietary ERP without API | 25,000 - 40,000 | Very high |
2026 rule of thumb: if your ERP exposes a documented API, integration stays reasonable. Without an API, you must build a connector, which can double the bill. Have your IT system audited before quoting.
Security and delivery timelines
An extranet exposes sensitive commercial data (pricing, margins, stock). The security level affects budget and timeline.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
| Security item | 2026 cost (EUR) | Added timeline |
|---|---|---|
| Strong authentication (2FA/SSO) | 2,500 - 6,000 | 1-2 weeks |
| Encryption + logging (GDPR) | 2,000 - 5,000 | 1-2 weeks |
| External security audit | 3,500 - 8,000 | 2-3 weeks |
| Sovereign hosting (EU) | 2,000 - 6,000/yr | - |
Overall 2026 timeline: 12-16 weeks for a launch extranet, 20-28 weeks with real-time ERP integration and security audit.
Mini case study
Thomas runs an electrical supplies wholesaler in Berlin, 850 reseller clients who place orders by phone and fax. His team of 4 inside sales reps spends around 60 % of its time entering orders, i.e. 3.2 FTE out of 5.3, at a loaded cost of EUR 42,000/yr per FTE.
He invests EUR 58,000 in an extranet with catalogue, per-client pricing and Sage ERP integration. After 6 months, 65 % of orders go self-service, freeing 2 FTE i.e. EUR 84,000/yr. The extranet pays back in 8.3 months, and the reps refocus on acquisition and high-margin advisory.
FAQ
How much does a launch B2B extranet cost in 2026? Between EUR 25,000 and 40,000 for a version with roles, catalogue and order entry, without real-time ERP integration. It's the best starting point to validate adoption.
Is ERP integration mandatory from the start? No. Many companies start with a scheduled import/export at EUR 4,000-8,000, then move to real-time once usage stabilises. This spreads the investment.
What timeline for a full integrated extranet? Expect 20 to 28 weeks, of which 4 to 8 weeks just for the ERP integration and 2 to 3 weeks of security audit if data is sensitive.
How do we secure displayed pricing and margins? Via strong authentication (2FA or SSO, EUR 2,500-6,000), granular per-role permissions and GDPR logging. An external audit (EUR 3,500-8,000) is recommended before go-live.
Does an extranet replace our CRM? No, it connects to it. The extranet handles self-service partner relations; the CRM keeps sales steering. Integration between the two costs EUR 3,000 to 7,000 depending on the API.
Let's scope your project. Tell us your target roles, your ERP and your deadline: we quote a launch extranet or an integrated platform. 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.
