The verdict in three sentences
In 2026, a reliable ERP or CRM connector costs between EUR 4,000 and 15,000 excluding VAT (roughly GBP 3,400 to 12,800), depending on volume, object complexity and the quality of the vendor's API. For a wholesaler re-keying orders and customer records every month between Salesforce, Sage and a portal, the return on investment is measured in months, not years. The real risk item is error and retry handling, which low quotes almost always leave out.
What a connector costs depending on the system
Price depends less on lines of code than on the number of synced objects (accounts, items, price lists, orders, invoices), the direction of the flows and how open the API is. On-premise Sage (Sage 100 in France, Sage 200 in the UK) often requires a gateway (Sage Data Cloud, ODBC or a third-party connector), which raises the bill.
| Connector | Typical objects | 2026 range (ex. VAT) | Lead time |
|---|---|---|---|
| Salesforce to business app | Accounts, contacts, opportunities | EUR 4,000 to 8,000 | 2 to 3 weeks |
| On-premise Sage to app | Items, prices, stock, orders | EUR 7,000 to 15,000 | 4 to 6 weeks |
| Sage cloud editions | Invoices, payments | EUR 5,000 to 10,000 | 3 to 4 weeks |
| HubSpot to app | Contacts, deals, tickets | EUR 3,500 to 7,000 | 2 weeks |
| Customer portal (B2B orders) | Orders, statuses, documents | EUR 5,000 to 12,000 | 3 to 5 weeks |
| Carrier API (Royal Mail, DB Schenker) | Labels, tracking | EUR 2,500 to 6,000 | 1 to 2 weeks |
| Annual maintenance per connector | API updates, monitoring | 15 to 20% of initial cost | Ongoing |
A full project with three bidirectional connectors for a wholesaler therefore lands, as a 2026 order of magnitude, between EUR 18,000 and 35,000 excluding VAT, including acceptance testing and documentation.
Make, n8n or custom code: picking the middleware
The middleware choice drives recurring cost, data control and robustness. Make and Zapier are fast for simple flows, but per-operation billing explodes at wholesaler volumes. Self-hosted n8n removes the per-run cost, provided someone runs it.
| Criterion | Make (SaaS) | Self-hosted n8n | Custom development |
|---|---|---|---|
| Software cost | USD 29/month (10,000 operations), USD 99+ beyond | No licence, server EUR 20 to 60/month | No licence, hosting EUR 30 to 150/month |
| Setup | EUR 1,500 to 5,000 | EUR 3,000 to 9,000 | EUR 4,000 to 15,000 per connector |
| Comfortable volume | Under 50,000 operations/month | Several hundred thousand | Unlimited, depending on architecture |
| Error handling | Basic, manual retry | Configurable error workflows | Queue, replay, custom alerts |
| Data hosting | Vendor servers (EU available) | Your servers | Your servers |
| Lock-in | High | Medium | Low, code handed over |
The rule of thumb: Make to prototype or under 10,000 operations a month, n8n when volumes climb and an IT team exists, dedicated development as soon as on-premise Sage, complex business rules or audit-trail requirements come into play.
Error and retry handling: the line item that makes the difference
An integration that works in a demo breaks in production for four reasons: API quota exceeded (Salesforce caps daily calls by edition), invalid data (missing VAT code, unknown item), temporary ERP downtime, simultaneous update conflict. A serious quote includes:
- a queue with automatic replay (3 to 5 spaced attempts);
- a sync log the order-desk team can read;
- alerts by email or Teams beyond a failure threshold;
- an idempotency key so the same order is never created twice;
- a clear source of truth per field (Sage for prices, Salesforce for contacts).
This foundation accounts for 20 to 30% of the integration budget. Cutting it to lower the quote means paying later in re-keying and customer disputes.
Mini case study
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Thomas, CIO of an industrial supplies wholesaler near London (65 staff), has orders from the portal re-keyed into Sage every month, along with new Salesforce accounts. The result: 3 days of re-entry a month for two order-desk assistants, plus a dozen pricing errors.
- Internal re-entry cost: 3 days × 2 people × EUR 280 loaded = EUR 1,680 a month, or EUR 20,160 a year.
- Cost of errors (credit notes, goodwill discounts): about EUR 600 a month, or EUR 7,200 a year.
- Project: Salesforce connector EUR 6,000, on-premise Sage EUR 12,000, portal EUR 8,000, so EUR 26,000 ex. VAT, plus EUR 4,500 annual maintenance.
- Annual gain: EUR 27,360. Payback in under 12 months, then about EUR 22,800 net saved each following year.
FAQ
How much does a single Salesforce connector cost?
Budget EUR 4,000 to 8,000 ex. VAT to sync accounts, contacts and opportunities into a business app. The top of the range covers bidirectional flows with deduplication rules.
Why is on-premise Sage more expensive to connect?
The on-premise edition has no native REST API, so you need a gateway or database access. That adds 2 to 3 weeks and often puts the connector between EUR 7,000 and 15,000.
Is Make enough for a wholesaler?
Up to roughly 10,000 operations a month, the USD 29 plan works. Beyond 50,000 operations, monthly cost and error handling point to n8n or dedicated development.
What should I budget for maintenance?
Plan 15 to 20% of the initial cost per year and per connector. Vendors change their APIs once or twice a year, and each change can break an unmonitored flow.
How long does a three-connector project take?
As a 2026 order of magnitude, 8 to 12 weeks including acceptance testing. The data-mapping phase (2 weeks) determines whether the deadline holds.
Let's scope your project. Send us your software list and monthly volumes: we price each connector, the right middleware and the go-live 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.
