The verdict in three sentences
For an Amsterdam industrial supplies SME managing 2,500 SKUs in Exact Online, a B2B webshop disconnected from the ERP creates more work than it removes: re-keying, wrong stock, inconsistent prices. An Exact Online integration with stock sync every 15 minutes costs, as a 2026 Dutch market estimate, 20,000 to 60,000 EUR for webshop and integration together, and lets you process 90% of orders without re-keying. At Kolonell, a B2B webshop integrated with the ERP falls under the "medium application" grid, 4,000,000 to 7,000,000 FCFA (6,100 to 10,670 EUR).
What flows between the B2B webshop and Exact Online
A successful integration defines exactly which system is the source of truth for each piece of data, and how often it flows. Exact Online remains the reference for items, prices, customers and accounting; the webshop becomes the entry point for orders.
| Flow | Direction | Recommended frequency | Comment |
|---|---|---|---|
| Items and product data | Exact to webshop | hourly | enriched descriptions on the webshop side |
| Available stock | Exact to webshop | every 15 minutes | alert threshold per SKU |
| Customer prices and discounts | Exact to webshop | hourly | pricing by product group and customer |
| Customer accounts and credit | Exact to webshop | hourly | block if credit limit exceeded |
| Orders | webshop to Exact | real time or 5 minutes | sales order created automatically |
| Invoices and credit notes | Exact to webshop | daily | PDF download in the customer area |
| Shipping status | Exact to webshop | every 30 minutes | carrier tracking number |
Syncing stock every 15 minutes is enough for most industrial SMEs. Real time only matters above 300 to 500 orders a day or for very tight items. Exact Online's API rate limits (a set number of calls per minute and per day) also make well-designed batch syncs preferable.
Budget and integration options in 2026
There are three ways to connect a B2B webshop to Exact Online. The choice depends on order volume and the share of customer-specific prices.
| Option | Initial cost (2026 market estimate) | Annual cost | Limits |
|---|---|---|---|
| Standard marketplace connector | 3,000 to 10,000 EUR | 1,500 to 4,800 EUR | complex customer pricing poorly handled |
| File-based integration (scheduled exports) | 6,000 to 15,000 EUR | 1,200 to 3,000 EUR | 1 to 4 hour lag |
| Custom API integration plus webshop, Dutch agency | 20,000 to 60,000 EUR | 3,000 to 8,000 EUR | depends on API limits |
| B2B webshop and ERP integration by Kolonell | 4,000,000 to 7,000,000 FCFA (6,100 to 10,670 EUR) | maintenance 35,000 to 120,000 FCFA per month | ERP scoping required |
The typical timeline is 8 to 12 weeks: 2 weeks auditing Exact data (duplicates, item groups, prices), 5 to 7 weeks of development, 2 to 3 weeks of acceptance testing with real orders.
Mini case study
Hypothetical example: Daan, managing director of an industrial supplies SME in Amsterdam, receives 70 orders a day by email and phone. His order desk colleague spends 7 minutes re-keying each order in Exact Online, more than 8 hours a day, and 3% of lines contain an error.
With an integrated B2B webshop and 60% of orders online, 90% of them with no re-keying, he saves about 38 orders a day, or 4.4 hours daily and 970 hours a year. At a loaded cost of 38 EUR per hour, the gain reaches 36,900 EUR a year. For an integrated project around 40,000 EUR, payback is roughly 13 months, before counting fewer errors and returns.
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FAQ
Can every Exact Online plan be integrated?
Yes, Exact Online exposes a REST API on its business plans. The main constraint is the call quota, which shapes the sync design and keeps costs about 20 to 30% lower when batch flows are used.
What happens if Exact Online is unavailable?
The webshop keeps taking orders and queues them. They are sent as soon as Exact is back, usually within 5 minutes.
Are negotiated customer prices respected?
Yes, if prices are correctly set up in Exact. A prior audit typically fixes 5 to 10% of inconsistent customer records before go-live.
How long does it take to train the team?
Half a day for the order desk and 1 hour for sales reps is enough. On the customer side, a 2-page guide and a welcome call to the first 50 accounts speed up adoption.
Can we add online payment?
Yes, iDEAL, card and SEPA direct debit can be added for 1,500 to 4,000 EUR. Most industrial SMEs keep 30-day invoicing for account customers and iDEAL or card for new ones.
Let's scope your project. Tell us your ERP plan, SKU count and daily orders for a precise integration estimate, an indicative budget and an 8 to 12 week plan. 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.
