PrestaShop B2B Replatforming Cost (2026)

The verdict in three sentences

Staying on PrestaShop 1.6 in 2026 means accepting real security risk, modules that break with every PHP update and a site that slows down your B2B sales. A full replatforming costs between EUR 20,000 and 60,000 excl. VAT depending on the target platform, and the most underestimated line is rarely design: it is data migration (accounts, price lists, history) and replacing around thirty modules. With a rigorous SEO redirect plan and a realistic timeline of 3 to 5 months, the switch happens without revenue loss.

Which target platform for B2B e-commerce in 2026?

The target choice drives 70% of the budget. Three options appear in almost every scoping we do for a mid-sized European B2B store.

PrestaShop 8 is the cheapest path if your business logic stays simple and your team already knows the back office. Sylius wins when you have complex pricing rules, multi-user accounts with approval flows and heavy ERP integrations. Shopify Plus suits standard catalogues where time to market matters more than customisation.

Where the migration budget really goes

On a B2B site with 15,000 customers and around 4,000 SKUs, the typical split looks like this.

Two points deserve attention. First, customer passwords: PrestaShop 1.6 uses a specific hashing scheme, so you either replicate it on the new platform or run a smooth reset campaign, otherwise 15% to 25% of customers will call support in the first week. Second, modules: out of 30 installed modules, we typically drop 8 that are no longer used, 15 have a native or marketplace equivalent, and 5 to 7 must be rebuilt.

SEO redirects: the non-negotiable line

A B2B store often gets 40% to 60% of its traffic from organic search. Changing URLs without a redirect plan loses 20% to 50% of organic traffic for months. Best practice: export every indexed URL, build a mapping table (categories, product pages, CMS pages), test the 301s on staging, then monitor Search Console daily for 6 weeks after go-live.

Mini case study

Thomas runs an industrial supplies distributor in Lyon with EUR 3.2M online revenue and 15,000 B2B accounts on PrestaShop 1.6. He picks Sylius to handle 12 price lists and order approval by his customers' buyers. Budget: EUR 46,000 excl. VAT, timeline 4.5 months. The new quick-order flow lifts conversion from 2.1% to 2.6%, roughly EUR 760,000 extra annual revenue at constant traffic (3.2M x 0.5 / 2.1). Even with a cautious assumption of 20% of that effect, the gain exceeds EUR 150,000 revenue per year: the migration pays back in margin within the first year.

FAQ

Can we migrate without stopping sales?

Yes. Data is migrated once for testing, then a delta migration runs on cut-over night. Actual downtime is usually 2 to 6 hours, scheduled over a weekend.

Can we upgrade straight from PrestaShop 1.6 to PrestaShop 8?

A direct upgrade is rarely possible: 1.6 themes and modules are incompatible. In practice it is a rebuild with database migration, for EUR 20,000 to 32,000 excl. VAT.

How long does a B2B replatforming take?

Allow 3 months for PrestaShop 8, 3 to 4 months for Shopify Plus and 4 to 5 months for Sylius. Timing depends mostly on the number of integrations (ERP, carriers) and your team's availability for testing.

Will we lose order history?

Not if it is planned. History (often 5 to 10 years) is migrated for the customer area and reorder suggestions. It represents about 8% to 10% of the data migration budget.

What SEO risk after migration?

With a complete, tested 301 table, traffic dips are usually limited to 5% to 10% for 4 to 8 weeks. Without a redirect plan, losses can reach 50%.

Let's scope your project. Send us your module list and customer volume: we will propose a target platform, an indicative budget between EUR 20,000 and 60,000 and a cut-over plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.