The verdict in three sentences
Leaving a rigid B2B platform without losing your search ranking or catalog costs in 2026 between 35,000 and 100,000 EUR, driven mainly by SKU volume and customer-data complexity. The two big risks are SEO traffic loss from missing 301 redirects and data errors during migration. A successful move is prepared with a content freeze, an exhaustive redirect map and rigorous acceptance testing.
Migration risks and how to cover them
| Risk | Consequence | Mitigation | 2026 cost (EUR) |
|---|---|---|---|
| SEO loss | -30 to -60% traffic | Exhaustive 301 redirects | 4,000 - 11,000 |
| Corrupted product data | Incomplete listings | Mapping + catalog testing | 5,000 - 14,000 |
| Lost customer accounts | Forced re-authentication | Account + price migration | 6,000 - 16,000 |
| Order history | Lost traceability | Migrate or linked archive | 4,000 - 12,000 |
| Go-live downtime | Blocked sales | Planned DNS cutover | 3,000 - 7,000 |
| Functional regression | Production bugs | Testing + content freeze | 5,000 - 13,000 |
These line items, plus new-platform configuration, explain the 35,000-100,000 EUR range.
Budget by SKU volume
| Catalog size | Data complexity | 2026 budget (EUR) | Timeline |
|---|---|---|---|
| < 1,000 SKUs | Standard | 35,000 - 48,000 | 2-3 months |
| 1,000 - 10,000 SKUs | Variants, datasheets | 48,000 - 68,000 | 3-4 months |
| 10,000 - 50,000 SKUs | Multi-account, negotiated pricing | 68,000 - 88,000 | 4-6 months |
| > 50,000 SKUs | Multi-site, ERP, multi-currency | 88,000 - 100,000+ | 6-9 months |
2026 order-of-magnitude estimate. SKU count matters less than initial data quality: a poorly structured catalog quickly doubles migration cost.
Mini case study
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Claire, CFO of a trading SME in Lyon, runs a 14,000-SKU B2B store on an aging solution costing 1,800 EUR/month in license and capping negotiated pricing. Migration to a modern platform is quoted at 62,000 EUR. Dropping the license (21,600 EUR/year) and reclaiming 3 hours/day of manual work saves about 38,000 EUR/year. The migration pays back in 20 months while securing an SEO channel that generated 45% of quote requests.
FAQ
How do I avoid losing SEO when migrating? A URL-by-URL 301 redirect map, preserved metadata and a before/after crawl are essential: this is the line item you never cut.
Must everything migrate, including order history? Not always. Products, customers and prices are migrated; history can be archived and kept read-only to reduce cost.
How long does a B2B migration take? From 2-3 months for under 1,000 SKUs to 6-9 months for over 50,000 SKUs with ERP and multi-currency.
Is a content freeze mandatory? Strongly recommended: freezing catalog and prices during cutover prevents data divergence between old and new platforms.
What is the main hidden cost? Data cleanup: a poorly structured catalog can double the migration budget, hence the value of an upfront audit.
Let's scope your project. Share your SKU volume, current platform and SEO traffic, and we will scope a migration between 35,000 and 100,000 EUR with a cutover 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.
