The verdict in three sentences
Syncing ERP and CRM kills double entry and guarantees a single, up-to-date customer record across sales, production and invoicing. In 2026, two approaches: a no-code iPaaS (Make, Zapier, n8n) at EUR 50-500/month, fast but billed by volume, or a custom connector at EUR 6,500-22,000, more robust at high volume. The tipping point sits around 10,000 to 20,000 monthly operations.
iPaaS or custom connector by volume
iPaaS shines for starting fast and connecting standard apps. But its cost climbs with operation volume and its reliability drops on complex or critical scenarios.
| Criterion | iPaaS (Make/Zapier) | Custom connector |
|---|---|---|
| Upfront cost | EUR 0 - 2,000 | EUR 6,500 - 22,000 |
| Recurring cost | EUR 50 - 500/mo | Hosting EUR 30-150/mo |
| Timeline | 1 - 3 weeks | 4 - 8 weeks |
| Suitable volume | < 10,000 ops/mo | > 20,000 ops/mo |
| Critical-scenario reliability | Medium | High |
| Complex business logic | Limited | Unlimited |
| Vendor lock-in | Strong | None |
Real 3-year cost by volume
The true comparison is total cost over time. An iPaaS at EUR 300/month costs EUR 10,800 over 3 years, before quota overages. Here is a 2026 projection.
| Monthly volume | iPaaS over 3 yrs | Custom over 3 yrs | Recommendation |
|---|---|---|---|
| < 5,000 ops | ~EUR 2,700 | ~EUR 9,500 | iPaaS |
| 5,000 - 15,000 ops | ~EUR 10,800 | ~EUR 12,000 | Depends on criticality |
| 15,000 - 40,000 ops | ~EUR 21,600 | ~EUR 15,000 | Custom |
| > 40,000 ops | Frequent overages | ~EUR 19,000 | Custom |
Mini case study
Aoife, owner of a 40-person services SME in Dublin, syncs 28,000 operations a month between her ERP and CRM. On an iPaaS at EUR 350/month plus overages, she reaches EUR 5,000/year. Over three years that is EUR 15,000, with outages during peaks. She moves to a custom connector at EUR 15,000 plus EUR 80/month hosting, i.e. EUR 17,900 over three years but with no incidents and her billing logic built in. Beyond 20,000 operations, reliability alone justifies custom.
FAQ
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What is an iPaaS?
A no-code integration platform (Make, Zapier, n8n) that links your apps through visual scenarios. Ideal to start fast on moderate volumes and standard connections.
When does custom become more cost-effective?
Usually beyond 15,000 to 20,000 monthly operations, or when scenarios are critical. The iPaaS recurring cost then exceeds the amortisation of a dedicated connector.
How long for a custom connector?
From 4 to 8 weeks depending on the number of objects to sync (customers, products, orders) and the complexity of reconciliation rules.
Can we start on iPaaS then migrate?
Yes, common practice: validate flows in no-code, then internalise as custom when volume or criticality demands. The defined rules become the spec.
How do we guarantee sync reliability?
Through error handling, queues and automatic retries, plus monitoring. That is precisely what custom controls better than a generic iPaaS.
Let's scope your project. Share your monthly volumes, the two tools to connect and your critical scenarios and we will price the most reliable iPaaS or custom option. 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.
