The verdict in three sentences
An ERP-CRM connector continuously syncing customers, orders and stock costs 15,000 to 40,000 EUR (excl. VAT) in 2026 for a Singapore mid-market firm, delivered in 4 to 8 weeks. The real decision is not the upfront price but the trade-off between a subscription iPaaS and a custom connector, which changes the three-year total cost. A reliable two-way flow removes double entry and produces measurable sales-time savings.
What the budget covers
A robust connector handles flows in both directions, resolves conflicts and monitors itself. Here is the 2026 breakdown for a custom connector.
| Item | Range (EUR excl. VAT) | Timeline |
|---|---|---|
| Scoping + flow mapping | 2,000 - 4,500 | 1 week |
| Two-way flows | 5,000 - 14,000 | 2-3 weeks |
| Conflict handling + deduplication | 3,000 - 8,000 | 1-2 weeks |
| Monitoring + alerts | 2,500 - 6,000 | 1 week |
| Testing + historical migration | 2,500 - 7,500 | 1 week |
| Project total | 15,000 - 40,000 | 4-8 weeks |
iPaaS vs custom connector
The three-year total cost depends mostly on the model. Here are 2026 orders of magnitude.
| Criterion | Subscription iPaaS | Custom connector |
|---|---|---|
| Upfront cost | 3,000 - 10,000 EUR | 15,000 - 40,000 EUR |
| Monthly subscription | 400 - 1,800 EUR | 0 (hosting 80-300 EUR) |
| 3-year cost (estimate) | 18,000 - 75,000 EUR | 18,000 - 51,000 EUR |
| Rule flexibility | medium | full |
| Data reliability | 97 - 99% | 99 - 99.9% |
| Vendor lock-in | high | low |
Mini case study
Karim, IT director of a 240-employee trading firm in Singapore, suffers from double entry between ERP and CRM: each salesperson loses about 4 hours a week re-keying data. For 12 salespeople, that is 48 hours a week. He invests 28,000 EUR (excl. VAT) in a custom connector, plus 250 EUR hosting and 500 EUR maintenance per month. By removing 80% of re-keying, he frees about 38 hours per week valued at 40 EUR, i.e. 79,000 EUR per year. Payback in under 5 months, with data reliability up from 94% to 99.5%.
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iPaaS or custom: which to choose?
iPaaS is faster to launch and fits standard flows. Custom becomes cheaper once business rules are complex or volumes grow, because the subscription disappears after the upfront investment.
How are data conflicts handled?
A priority rule (master system per field) plus deduplication resolve collisions. Ambiguous cases are queued for human arbitration, with a full log.
How often does the sync run?
From a few seconds (event-driven via webhooks) to a few minutes (batches). Real time raises the load but avoids inconsistencies visible to sales.
What if the ERP is down?
The connector queues messages and replays after recovery. Monitoring alerts on failure; no data is lost thanks to the replay mechanism.
What recurring cost should we plan for?
For custom: 80 to 300 EUR hosting plus 500 to 1,000 EUR maintenance per month. For iPaaS: 400 to 1,800 EUR monthly subscription.
Let's scope your project. Tell us your ERP, your CRM, the objects to sync and your target budget (15,000-40,000 EUR excl. VAT) for a tailored estimate. 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.
