PrestaShop Import / Export

Sellsy PrestaShop Connector – CRM/ERP Sync (customers, orders, invoices)

Your PrestaShop store connected to Sellsy, in real time

At a glance
  • Syncs customers, products, orders, invoices and credit notes to Sellsy
  • Sellsy API v2 with OAuth2 (client credentials), tokens managed automatically
  • Sellsy invoice validated automatically and payments recorded
  • Sellsy credit notes created on every refund and linked to the original invoice
  • Compatible with PrestaShop 8 and 9, built-in cron and sync log
PrestaShop 8 & 9 Sellsy API v2 Made in France GDPR
  • 30-day refund
  • 12 months updates
  • 24h support
www.datafirefly.com/en/
Sellsy PrestaShop connector – CRM/ERP synchronization (customers, orders, invoices)
v1.1.0 · updated 2026-07-06
What it does

The short version.

01

Customers synced automatically

Every sign-up or update creates/updates a Sellsy third party: company (with SIRET) for B2B, individual otherwise. Email lookup to avoid duplicates and invoicing address push.

02

Orders as invoices or sales orders

On validation or payment (your choice), the order becomes a Sellsy document: product lines, shipping and discounts, with automatic VAT rate matching.

03

Validated invoices and recorded payments

The Sellsy invoice is validated automatically and PrestaShop payments are recorded on it — even partial or multiple payments, with no duplicates.

04

Credit notes on refund

Every PrestaShop credit slip generates a Sellsy credit note, validated and linked to the original invoice for consistent accounting.

05

Product catalog (optional)

Push your products to the Sellsy catalog in real time and/or through a bulk sync from the back office.

06

Reliable and traceable

Built-in cron to catch anything the real-time hooks missed, a filterable sync log and a “retry errors” button.

The long version

Everything you'd want to know before you install.

A detailed look at how Sellsy PrestaShop Connector – CRM/ERP Sync (customers, orders, invoices) works, why we built it the way we did, and the thinking behind the features above.

§ 01

Automate your invoicing between PrestaShop and Sellsy

The DataFirefly Sellsy connector links your PrestaShop store to Sellsy, the French SaaS CRM, invoicing and management solution. Every customer, order and refund flows automatically into Sellsy through the v2 API, with no re-keying. You save time on admin work and make your accounting more reliable.

§ 02

A complete order-invoice-payment flow

Depending on your settings, a validated or paid order becomes a Sellsy invoice (or sales order), with product lines, shipping, discounts and the right VAT rates. The invoice is validated automatically and PrestaShop payments are recorded on it, including partial or multiple payments. On a refund, a Sellsy credit note is created and linked to the original invoice.

§ 03

Robust and production-ready

Real-time hooks handle the day-to-day, while a built-in cron catches anything that might have failed. A filterable sync log shows every operation, and a “retry errors” button replays failures in one click. Compatible with PrestaShop 8 and 9 and multistore.