“Can a French CRM-invoicing SaaS become the default finance OS for SMBs by riding the French e-invoicing mandate?”
Sellsy started in 2009 as a cloud CRM + invoicing suite for French SMBs and expanded internationally in the mid-2010s. It has progressively bolted on adjacent finance modules — online payments (Stripe, Adyen, GoCardless), pre-accounting connectors, and a cash-flow product via the RocketChart acquisition — to evolve from a CRM into an all-in-one revenue and finance OS for small French companies. The recent regulatory wedge is French e-invoicing: Sellsy is positioning itself as a certified Plateforme Agréée (PDP). In 2024 it was rolled up into TeamSystem, the Italian SMB ERP group.
Sellsy processes payments through Stripe, Adyen, GoCardless, PayPal and Stancer. Disclosed money-movement rails: SEPA.
Sellsy integrates with Pennylane, Sage 1000, Tiime, ACD and QuickBooks.
The Embedded Finance Index 2026 maps 5 layers in Sellsy's stack: Payments / PSP (Stripe, Adyen, GoCardless, PayPal and 1 other); Money movement (SEPA); Unified APIs (Chift); Accounting (Pennylane, Sage 1000, Tiime, ACD and 1 other); Treasury (RocketChart (in-house, acquired)).
Sellsy is founded in 2009 and headquartered in La Rochelle, France.
Get a read on where your own stack stands against Sellsy and the rest of its category — what they built versus bought, which providers they use, and where the gaps in your own strategy and competitive set actually are.