The verdict in three sentences
An SMB running ERP and CRM separately re-enters the same data twice, losing 30 to 60 hours per month with a high error rate. An iPaaS (80-250 EUR/month) automates simple flows, while a custom connector (7,000-20,000 EUR one-off) syncs 300 to 1,200 records per day and cuts data-entry errors by 85 %. To scope an accurate budget, price the volume, the number of objects to map and annual maintenance (12 %/year).
iPaaS vs custom connector: the 2026 comparison
iPaaS remains the most accessible way to start. Custom becomes profitable as volume climbs or when a resilient replay queue is required.
| Criterion | iPaaS (monthly) | Custom connector |
|---|---|---|
| Upfront cost | 200-800 EUR (setup) | 7,000-20,000 EUR |
| Monthly cost | 80-250 EUR | 30-90 EUR (hosting) |
| Comfortable volume | < 400 records/day | 300-1,200 records/day |
| Data-entry error cut | 60-70 % | up to 85 % |
| Weak-network resilience | limited | built-in replay queue |
| Delivery time | 1-3 weeks | 5-8 weeks |
| Code ownership | no | yes |
3-year TCO and synced volume
Over three years, the iPaaS subscription accumulates while custom amortizes its build. Custom maintenance runs at 12 % of the build per year.
| Line item | iPaaS (3 yrs) | Custom (3 yrs) |
|---|---|---|
| Setup / build | 500 EUR | 13,000 EUR |
| Subscription / hosting | 5,400 EUR | 2,160 EUR |
| Maintenance / changes | 1,800 EUR | 4,680 EUR |
| 3-year TCO | 7,700 EUR | 19,840 EUR |
| Reliable max volume | ~400/day | ~1,200/day |
| Re-keying hours saved/month | 20-35 h | 30-60 h |
Mini case study
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Stefan, owner of a 25-person distribution SMB in Berlin, has orders re-keyed from ERP to CRM: 48 hours/month at a loaded cost of 30 EUR/h, or 1,440 EUR/month, plus errors on 7 % of orders. He invests 14,000 EUR in a custom connector (60 EUR/month hosting) syncing 600 records/day with a replay queue. Net monthly saving: about 1,380 EUR, plus errors cut to 1 %. Payback: 14,000 / 1,380 = 10.1 months, after which the connector delivers over 16,000 EUR of value per year.
FAQ
Is an iPaaS enough to start? Yes, below 400 records/day with simple flows, at 80-250 EUR/month. Above that, quotas and reliability push custom ahead.
How do I scope the budget fast? Add up daily volume (records/day), the number of objects to map and maintenance (12 %/year). A standard connector lands between 7,000 and 20,000 EUR depending on complexity.
Does custom handle connection drops? Yes: a replay queue stores records and resends them on reconnection, preventing a desync of 300 to 1,200 records during an outage. Entry-level iPaaS doesn't always guarantee this.
How much do errors drop? A custom integration cuts data-entry errors by 85 %, versus 60-70 % for iPaaS. From a 7 % error rate, that brings it below 1.5 %.
How long to deliver? An iPaaS is wired in 1 to 3 weeks, a custom connector in 5 to 8 weeks, volume tests and replay queue included.
Let's scope your project. Share your ERP, CRM, daily sync volume and target budget (7,000-20,000 EUR): we build the quote. 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.
