The verdict in three sentences
A vertical WMS is the right call if your flows fit a standard and you accept its picking rules. The moment your warehouse process is a competitive edge (dynamic locations, multi-order picking, tight ERP/e-commerce integration), custom software at 65 000-140 000 CAD is justified. The return comes mostly from picking errors and picking productivity.
Vertical WMS vs custom: 2026 comparison
| Criterion | Vertical WMS (SaaS) | Custom WMS |
|---|---|---|
| Entry cost | 45 to 100 CAD/user/mo + setup | 65 000 to 140 000 CAD (build) |
| 5-year cost (12 users) | 32 000 to 72 000 CAD + setup | 65 000-140 000 + TMA |
| Annual maintenance | Included | 15-18 % of build |
| Time to launch | 6 to 12 weeks | 5 to 8 months |
| Picking rules | Standard | Custom |
| ERP/e-commerce integration | Connectors | Full API |
| Data & code ownership | No | Yes |
Below ~1 500 order lines/day, SaaS is often the rational choice. Above that, each point of picking productivity weighs heavily.
Custom WMS scope and indicative effort
| Module | Key function | Indicative effort (person-days) |
|---|---|---|
| Locations & zoning | Addressing, dynamic locations | 12 to 18 |
| Optimized picking | Multi-order, waves, paths | 18 to 28 |
| Cycle counting | Cyclical counts, variances | 10 to 15 |
| Receiving & QC | ASN, quality control | 10 to 14 |
| ERP/e-commerce integration | Stock, orders, shipments | 15 to 22 |
| Reporting & KPIs | Service level, productivity | 8 to 12 |
Budget 5 to 8 months for a full WMS integrated with the ERP and e-commerce front.
Mini case study
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Sarah is head of logistics at a distributor near Montreal, 12 pickers, ~2 200 order lines/day. Before, the picking error rate hit 2.1 % and picking was done order by order. After custom software at 118 000 CAD (multi-order picking, dynamic locations, ERP integration), errors drop 45 % (to ~1.15 %), picking productivity rises 22 %, and the team saves 16 hours/month on admin. Stockouts fall 30 % thanks to cycle counting. Between avoided quality costs, productivity and hours saved, the annual gain tops 80 000 CAD. Payback in 20 months, with ~19 000 CAD/year maintenance included.
FAQ
What does a custom WMS cost in Montreal in 2026? From 65 000 to 140 000 CAD by scope. A full WMS with optimized picking and ERP integration lands around 100 000-125 000 CAD, plus 15-18 %/year maintenance.
Vertical WMS or custom? Below ~1 500 lines/day or for standard flows, SaaS at 45-100 CAD/user/month + setup is faster. Above that, or if the warehouse is a competitive edge, custom pays back in 18-24 months.
Does the WMS integrate with my ERP and e-commerce? Yes, via API: real-time sync of stock, orders and shipments. Budget 15 to 22 person-days.
How does it cut picking errors? Through guided picking (scan, source-level control) and dynamic locations, typically cutting errors by ~45 %.
How long until go-live? 5 to 8 months, with a pilot on one warehouse zone before roll-out.
Let's scope your project. Share your lines/day volume, your ERP and your e-commerce front, and we'll price the build (65 000-140 000 CAD) and maintenance. 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.
