The verdict in three sentences
A SaaS distribution ERP at EUR 50-150/user/month quickly structures a single-warehouse wholesaler with simple pricing. As soon as you manage multiple warehouses, per-client price grids and EDI, off-the-shelf throttles your sales productivity. Custom software (EUR 60,000-180,000) pays back by cutting stockouts and speeding up B2B order entry.
The functions that make the margin
A wholesaler juggles multi-warehouse stock, negotiated per-client pricing and fast order entry. These three points separate a standard tool from a platform cut for your trade.
| Function | Vertical SaaS ERP | Custom platform |
|---|---|---|
| Multi-warehouse stock | Yes, basic | Yes, auto reorder by threshold |
| Per-client pricing | Limited grids | Unlimited rules + volume rebates |
| B2B order entry | Fixed interface | Portal + field sales app |
| Supplier/client EDI | Costly option | Built-in, custom formats |
| Accounting integration | Connectors | Custom, auto reconciliation |
| Stockout alerts | Rare | Predictive from history |
| Per-line margin reporting | Partial | Full, real-time |
Fine-grained per-client pricing is where generalist SaaS most often fails: every account has its terms, rebates and free-shipping thresholds.
Cost per user and stockout gains
Here is a 2026 order of magnitude over 4 years for a typical wholesaler.
| Users | SaaS ERP at EUR 100/user/mo (4 yrs) | Custom EUR 120,000 + 12%/yr |
|---|---|---|
| 10 users | EUR 48,000 | EUR 177,600 |
| 20 users | EUR 96,000 | EUR 177,600 |
| 30 users | EUR 144,000 | EUR 177,600 |
| 40 users | EUR 192,000 | EUR 177,600 |
| 60 users | EUR 288,000 | EUR 177,600 |
The crossover sits around 37 users. But the real lever is stockouts: a wholesaler with EUR 12M revenue and a 6% stockout rate potentially loses EUR 720,000 of unfulfilled orders. Bringing that to 3% via auto reorder and predictive alerts recovers about EUR 360,000 in revenue, at distributor margin (18-25%) that is EUR 65,000-90,000 of annual margin.
Mini case study
Marc runs an industrial supplies wholesaler in Nantes, 26 users, EUR 9.5M revenue, 5.5% stockout rate. He invests EUR 125,000 in a custom platform, about EUR 32,000/year over 4 years with maintenance. Multi-warehouse auto reorder brings stockouts to 2.8%, recovering about EUR 257,000 in revenue at 21% margin, so EUR 54,000 of margin/year. The field sales app saves 20 minutes per visit for 8 reps, about 1,400 hours/year. Net of the software, the net gain exceeds EUR 45,000 per year, before sales productivity.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
FAQ
What does a custom distribution ERP cost in 2026?
Between EUR 60,000 for a stock + orders + pricing core and EUR 180,000 for a full platform with EDI, B2B portal and field app. Annual maintenance is 10 to 15% of the build.
Can we manage different prices per client?
Yes, it is one of the main gains of custom: unlimited rules, volume rebates, free-shipping thresholds and negotiated terms per account, applied automatically at order entry.
Is EDI essential?
Not always, but it pays off once you exchange hundreds of orders with key accounts. It removes re-keying and secures supplier and client flows.
What is the time to production?
6 to 12 months. The stock + orders core ships in 6-7 months; EDI, the B2B portal and margin reporting add 3 to 5 months.
How do we reduce stockouts?
Through automatic reorder thresholds, predictive alerts based on history and a real-time multi-warehouse view. That is what turns a lost stockout into a fulfilled order.
Let's scope your project. Give us your number of warehouses, SKU count and pricing structure, and we will price the core and the stockout gain. 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.

