The verdict in three sentences
A B2B e-commerce that does not talk to the ERP in real time ends up selling stock it no longer has and showing wrong prices: order errors climb and sales reps spend their days fixing them. The right architecture cuts those errors by 40 to 70 % and frees the back office. The choice is between a shared iPaaS (fast, subscription) and a custom real-time connector (investment, full control).
What synchronisation really costs in 2026
In Singapore as elsewhere, price depends on the number of flows (stock, prices, customers, orders, invoices) and the freshness required. 2026 orders of magnitude for a mid-sized industrial firm:
| Item | 2026 range (EUR ex. VAT) | Note |
|---|---|---|
| ERP <-> e-commerce connector | 12,000 - 38,000 | By number of flows and ERP complexity |
| Real-time stock/price sync | 6,000 - 16,000 | Webhooks + queues |
| Cost per synced flow | 2,000 - 5,000 | Stock, prices, orders, customers, invoices |
| iPaaS (subscription) | 6,000 - 24,000 / year | By volume and connectors |
| Maintenance (annual) | 12 - 18 % of build | ERP evolutions + version upgrades |
| Integration developer day rate | 500 - 680 | Senior middleware profile |
A full project typically takes 8 to 16 weeks depending on the number of flows and the state of the ERP API.
Shared iPaaS or custom connector?
| Criterion | Shared iPaaS | Custom connector |
|---|---|---|
| Entry cost | 6,000 - 12,000 EUR/year | 12,000 - 38,000 EUR one-off |
| Strict real time | Often near real time | Yes, dedicated webhooks |
| Complex B2B pricing logic | Limited | Full (grids, customer discounts) |
| Vendor lock-in | High | Low |
| 3-year cost (5 flows) | ~30,000 - 55,000 EUR | ~30,000 - 50,000 EUR + maintenance |
| Best for | Standard flows, fast start | Sharp B2B grids, high volumes |
Simple rule: if your per-customer pricing grids and volume discounts are the core of the business, custom pays off; if flows are standard, iPaaS speeds up go-live.
Mini case study
Sarah, COO of a 45-person industrial firm in Singapore, runs a 3,200-SKU catalogue on Cegid. Before integration, her reps fixed about 60 orders/month due to wrong stock or price, roughly 30 h/month at EUR 35 loaded = EUR 1,050/month of lost time, excluding credit notes. A real-time connector at EUR 22,000 plus 15 % maintenance (EUR 3,300/year) cuts errors by 65 %. Direct saving: ~EUR 8,200/year in time, payback in about 20 months excluding commercial gains (fewer credit notes, more loyal customers).
FAQ
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How much does an ERP to B2B e-commerce connector cost in 2026?
Budget EUR 12,000 to 38,000 depending on the number of flows. A 5-flow project (stock, prices, customers, orders, invoices) most often lands around EUR 20,000 to 30,000.
iPaaS or custom development: which is cheaper?
Over 3 years, a 5-flow iPaaS runs EUR 30,000-55,000, close to an amortised custom build. Custom wins as soon as B2B pricing logic gets complex or volumes are high.
How long for a real-time stock/price sync?
Between 8 and 16 weeks depending on the ERP API. Stock/price sync alone (EUR 6,000-16,000) often ships in 4 to 6 weeks.
By how much do order errors drop?
Usually by 40 to 70 %. On a flow of 60 wrong orders/month, a 65 % drop means ~39 fewer corrected orders each month.
What annual maintenance budget should I plan?
Budget 12 to 18 % of the build cost per year to absorb ERP version upgrades and catalogue changes.
Let's scope your project. Tell us your ERP, the number of flows to sync and your order volume: we frame the architecture (iPaaS or custom connector) and an 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.
