The verdict in three sentences
Replatforming a growing B2B online store costs between 45,000 and 130,000 EUR in Dubai in 2026, over a 5 to 10 month timeline depending on catalog scope and integrations. You replatform when the current platform holds back growth: slowness, saturated catalog, impossible integrations, sagging conversion. ROI comes from combining performance + B2B experience, which lifts conversion and average order value without reacquiring traffic if SEO is preserved.
When replatforming becomes profitable
Replatforming is triggered by precise symptoms. Here are the common limits and the cost to fix them.
| Current limit | Business impact | Fix cost (EUR) |
|---|---|---|
| Slow site (> 3.5 s) | - conversion, - SEO | 12,000 - 25,000 |
| Saturated / poorly structured catalog | Ineffective search | 10,000 - 22,000 |
| Impossible integrations (ERP, PIM) | Manual entries | 15,000 - 35,000 |
| No B2B functions (pricing, quotas) | Lost pro customers | 12,000 - 30,000 |
| Dated mobile / UX | Cart abandonment | 8,000 - 18,000 |
| SEO not preserved during changes | Traffic loss | 6,000 - 15,000 |
Replatforming and expected gains
| Replatform item | 2026 range (EUR) | Expected gain | Timeline |
|---|---|---|---|
| Targeted rework (perf + UX) | 45,000 - 65,000 | + 10-15% conversion | 5 - 6 months |
| Full rebuild (+ extended catalog, B2B) | 65,000 - 95,000 | + 15-25% conversion | 7 - 8 months |
| Full replatforming (+ integrations, PWA) | 95,000 - 130,000 | + 20-30% conversion, + AOV | 9 - 10 months |
| Annual maintenance | 8,000 - 20,000 / year | stability, evolutions | ongoing |
In B2B, the effect of performance and better product search compounds with a higher average order value (fuller baskets, easier reorders).
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Thomas, e-commerce manager of a B2B office-supplies SME in Dubai, does 2.4 M EUR in online sales at a 1.8% conversion rate on a site loading in 4.2 s. His platform handles neither per-customer pricing nor quick reorder. He invests 88,000 EUR in a full rebuild.
Result over 8 months: load time at 1.5 s, conversion up to 2.3% (+0.5 pt) and B2B average order value up 9%. On his volume, that is about +430,000 EUR in additional annual sales. With SEO preserved by a redirect plan, the rebuild pays back in under 3 months of sales gains.
FAQ
What budget for a B2B rebuild? Between 45,000 and 130,000 EUR depending on scope: a targeted perf + UX rework starts at 45,000 EUR, a full replatforming with integrations reaches 130,000 EUR.
Rebuild or just optimization? If symptoms are isolated (slowness only), a 12,000-25,000 EUR optimization is enough. If several limits compound (perf, catalog, integrations, B2B functions), a rebuild is more profitable.
Will I lose my SEO? No, provided a 301 redirect plan and URL-structure preservation. It is an item to budget (6,000-15,000 EUR) but essential.
What realistic conversion gain? From +10 to +30% depending on the starting gap. Performance (Core Web Vitals) and effective product search are the fastest levers.
How long for the rebuild? From 5 to 10 months. A targeted rework ships in 5-6 months; a full replatforming with integrations needs 9-10 months.
Let's scope your project. Give us your sales volume, current conversion rate and technical limits: we quote the rebuild and project the ROI. 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.