The verdict in three sentences
For a distributor, each integration flow between the e-commerce site, the ERP (Sage X3, Dynamics, Exact) and carriers costs between EUR 8,000 and 40,000 excluding VAT to develop in 2026. Add a middleware or iPaaS at EUR 300 to 1,500 a month and error monitoring, without which a blocked order goes unnoticed for days. The project ships in 6 to 12 weeks and removes 3 to 6 hours of re-keying a day.
Price per flow
A CIO thinks in flows, not in one global project. Each flow has its own complexity, driven by volume, direction of exchange and the quality of available APIs. Sage X3 and Dynamics 365 expose decent REST APIs; some older ERP versions require scheduled file exchanges.
| Flow | Direction and frequency | Complexity | 2026 budget (excl. VAT) | Timeline |
|---|---|---|---|---|
| E-commerce orders to ERP | One-way, real time | Medium | EUR 8,000 to 15,000 | 3 to 4 weeks |
| ERP stock and prices to e-commerce | One-way, every 15 minutes | Medium | EUR 8,000 to 14,000 | 3 weeks |
| Product catalogue (PIM or ERP to site) | One-way, daily | Medium to high | EUR 10,000 to 22,000 | 4 to 5 weeks |
| Carrier labels and tracking (PostNL, DPD, DHL) | Two-way | Medium | EUR 9,000 to 18,000 | 3 to 5 weeks |
| B2B EDI orders (retail chains) | Two-way, EDIFACT standards | High | EUR 20,000 to 40,000 | 8 to 12 weeks |
| Invoices to e-invoicing platform (Peppol) | One-way | Medium | EUR 8,000 to 16,000 | 3 to 4 weeks |
The last flow is becoming a priority: the EU ViDA package and national e-invoicing mandates (France from September 2026, Belgium since January 2026) push structured invoicing via Peppol. Planning this flow now avoids a second project under pressure.
In-house middleware, iPaaS or off-the-shelf connectors
| Approach | Initial cost | Recurring cost | Strengths | Limits |
|---|---|---|---|---|
| Off-the-shelf connectors | EUR 1,000 to 5,000 | EUR 50 to 300 a month per connector | Fast | Rigid, weak error handling |
| iPaaS (Make, n8n, Boomi, Workato) | EUR 5,000 to 20,000 configuration | EUR 300 to 1,500 a month | Visual, easy maintenance | Cost grows with volume |
| Custom middleware (Node.js, message queue) | EUR 15,000 to 60,000 | EUR 300 to 800 a month hosting and light support | Full control, no per-transaction fee | Needs competent support |
| Point-to-point development | EUR 8,000 to 15,000 per flow | Low | Cheap at first | Unmanageable beyond 3 or 4 flows |
For a distributor with EUR 20 to 100M revenue and 4 to 6 flows, the most common 2026 order of magnitude is a light middleware or an iPaaS, with a total budget of EUR 40,000 to 90,000 excluding VAT in year one.
Monitoring, the line budgets forget
An integration without monitoring is hidden debt. Require a dashboard showing every failed message, an email or Teams alert within 5 minutes, one-click replay and a log kept for at least 90 days. This module accounts for 10 to 15% of the budget, but it prevents lost orders, whose commercial cost quickly exceeds the development cost. Track the error rate too: a well-designed flow stays below 0.5% rejected messages.
Mini case study
Sophie, CIO of an electrical equipment distributor near Amsterdam (EUR 45M revenue, 350 web orders a day, Sage X3 ERP), has two assistants re-keying web orders into the ERP and carrier labels, or 5 hours a day with a 2% error rate.
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She launches three flows (orders to X3, stock to the site, carriers) on an iPaaS: EUR 38,000 excluding VAT in development, delivered in 10 weeks, and EUR 900 a month for subscription and monitoring. The gain reaches 5 hours × 220 days = 1,100 hours a year, valued at EUR 30 loaded, or EUR 33,000. Keying errors fall from 2% to 0.3%, avoiding about 1,300 returns or disputes a year, estimated at EUR 15 each, or EUR 19,500. Annual gain: EUR 52,500 for a year-one cost of EUR 48,800. Payback: under 11 months.
FAQ
How much does an integration between an e-commerce site and Sage X3 cost?
Between EUR 8,000 and 15,000 excluding VAT for the order flow, about the same for stock and prices. Allow 3 to 4 weeks per flow.
Should we use an iPaaS or custom development?
An iPaaS fits up to a few thousand transactions a day. Beyond that, or with complex business rules, custom middleware avoids subscriptions exceeding EUR 1,500 a month.
How do we handle e-invoicing?
By connecting the ERP to a Peppol access point through a dedicated flow, for EUR 8,000 to 16,000 excluding VAT. Several EU countries already require it for B2B in 2026.
What happens when the ERP is down?
Well-designed middleware queues messages and replays them automatically. No order is lost, even after several hours of downtime.
Who maintains the integrations?
Support at EUR 300 to 800 a month covers monitoring, fixes and API version upgrades.
Let's scope your project. List your flows, your ERP and your daily volumes: we price each integration from EUR 8,000 to 40,000 excluding VAT with monitoring included and a 6 to 12 week plan. 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.
