The verdict in three sentences
A custom ERP-CRM connector costs in 2026 between 15,000 and 40,000 EUR depending on the number of synced objects and the mode (batch or real-time). It eliminates double entry, cleans up data and commonly saves your teams 30 hours/month. Plan for 6 to 12 weeks, rigorous mapping and mandatory monitoring to handle conflicts.
How much a connector costs in 2026
Price depends on the number of objects (accounts, contacts, orders, invoices), sync direction and frequency.
| Scope | Budget (EUR) | Mode | Timeline |
|---|---|---|---|
| Accounts + contacts (1-way) | 15,000 | Nightly batch | 6 weeks |
| + Orders (bidirectional) | 24,000 | Hourly batch | 8 weeks |
| + Invoices + stock | 32,000 | Near real-time | 10 weeks |
| Full multi-object sync | 40,000 | Real-time + webhooks | 12 weeks |
Real-time (via webhooks and message queues) costs more than nightly batch, but becomes essential once your sales reps need up-to-the-minute data.
The items that drive the price
A reliable connector is not a simple script: it is an integration system with error handling.
| Item | Share of budget | Why it is critical |
|---|---|---|
| Field mapping | 25 % | Exact ERP/CRM matching |
| Conflict handling | 20 % | Who wins on a mismatch |
| Monitoring and alerts | 20 % | Detect sync failures |
| Error recovery | 15 % | Replay without duplicates |
| Testing and acceptance | 20 % | Reliability in production |
Without conflict handling and error recovery, a connector creates duplicates and corrupts data at the first network incident. That is what separates a 15,000 EUR project from a 4,000 EUR hack.
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Mini case study
Mark, IT director at a B2B distribution SME in Amsterdam, has 5 people manually re-entering orders and invoices between ERP and CRM. This double entry costs 35 hours/month and generates billing errors.
He invests 24,000 EUR in a bidirectional hourly-batch connector. He saves 30 hours/month at a loaded cost of 55 EUR/h, or 1,650 EUR/month, plus fewer billing disputes. The project pays back in about 15 months, but data reliability is immediate and priceless.
FAQ
Batch or real-time? Batch (hourly or nightly) is enough for accounting and reporting. Real-time is required when sales reps need order status to the minute. Real-time costs 20 to 40 % more.
What happens on a data conflict? A priority rule is defined during mapping (for example, ERP wins on invoices, CRM on contacts). Monitoring alerts on unresolved discrepancies.
How long to set up? 6 to 12 weeks depending on object count and mode. Mapping and acceptance testing account for half the timeline.
What if I switch ERP later? A well-architected connector isolates business logic from APIs: switching ERP means adapting one adapter, not rebuilding everything.
Does the connector need maintenance? Yes: vendor APIs evolve. Budget a supervision and update plan, typically 10 to 15 % of the build per year.
Let's scope your project. Specify your two tools (ERP and CRM), the objects to sync and your indicative budget. 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.
