The verdict in three sentences
If your team re-keys the same orders into the ERP and then the CRM, you lose 90 to 200 hours per month — a hidden cost that quickly outweighs the price of a connector. For a simple, standard flow, a subscription iPaaS (EUR 6,000 to 24,000/year) is enough; the moment business logic gets specific, the custom connector (EUR 15,000 to 55,000) wins over three years. The real risk isn't the price — it's a sloppy API mapping that corrupts your customer data.
iPaaS vs custom connector: the 2026 numbers
An iPaaS (Integration Platform as a Service — Make, Zapier, Workato, Boomi) bills by subscription and task volume. A custom connector is a development you own, hosted on your side, with no volume cap but an annual maintenance (TMA) fee.
| Criterion | iPaaS (subscription) | Custom connector |
|---|---|---|
| Upfront cost | EUR 0 to 3,000 (setup) | EUR 15,000 to 55,000 |
| Recurring cost | EUR 6,000 to 24,000/year | Maintenance 12 to 18 %/year of build |
| Time to go live | 2 to 6 weeks | 8 to 16 weeks |
| Transaction volume | Billed by tier | Unlimited |
| Complex business logic | Limited | Fully custom |
| Code ownership | No (tenant) | Yes (asset) |
| Vendor lock-in | High | None |
Simple rule: under 10,000 transactions/month with standard fields, iPaaS wins. Above that, or with your own rules (multi-tier discounts, cross-border VAT, batch numbers), custom pays off from year three.
What actually drives the bill
A serious integration quote itemizes every line. Here are 2026 ranges for a Singapore-based integrator, at a day rate of EUR 500 to 700.
| Line item | 2026 range (EUR) |
|---|---|
| API mapping per system | 2,500 to 6,000 |
| Sync logic development | 6,000 to 20,000 |
| Error handling and retry | 2,000 to 5,000 |
| Monitoring and logs | 1,500 to 4,000 |
| End-to-end testing | 2,000 to 6,000 |
| Documentation and handover | 1,000 to 3,000 |
| Annual maintenance | 12 to 18 % of build |
The most underestimated line is error handling: what happens if Salesforce is down for 20 minutes? A good connector queues the transaction and replays it. A bad one loses it silently.
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Mini case study
Claire, CFO of an industrial mid-market firm in Singapore (140 staff), finds that 3 sales-admin assistants re-key every order from Odoo into Salesforce: 150 hours/month at a loaded cost of EUR 28/h, i.e. EUR 4,200/month of unproductive entry. She quotes a custom connector at EUR 34,000, plus EUR 5,800/year maintenance. It removes 90 % of the re-keying — EUR 3,780/month saved (EUR 45,360/year). Payback: 34,000 / 3,780 ≈ 9 months. Over three years, net savings exceed EUR 90,000, before counting fewer billing errors.
FAQ
How long to connect Odoo to Salesforce? Budget 8 to 12 weeks for a standard two-way orders-and-customers flow, up to 16 weeks if you add stock and invoice sync with VAT rules.
iPaaS or custom: which is cheaper? Over one year, iPaaS is almost always cheaper (from EUR 6,000/year). Over three to five years at high volume, custom pulls ahead because you stop paying subscription — only 12 to 18 % maintenance.
What does mapping an extra system cost? Each new system (Sage, a WMS, a marketing tool) adds EUR 2,500 to 6,000 of API mapping, because every API has its own fields, date formats and rate limits.
What's the real ROI? It comes from killing double entry: 90 to 200 hours/month depending on volume, often EUR 2,500 to 5,000/month recovered, with payback in 8 to 14 months.
Do I need maintenance after delivery? Yes: APIs evolve (Salesforce ships 3 releases/year). A 12 to 18 %/year maintenance contract keeps the sync alive through updates and schema changes.
Let's scope your project. Tell us your systems (ERP, CRM, monthly volumes) and priority flows: we'll frame iPaaS or custom with an indicative budget and timeline. 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.
