Stancer is a French payment processing platform for merchants. Its documentation notes that Stancer operates as an “Etablissement de paiement” (licensed Payment Institution) in France. The service allows businesses to accept online and in-person payments via credit/debit cards and mobile wallets (including Apple Pay and Google Pay). It supports major card schemes (Carte Bleue, Visa, Mastercard) with transparent fee billing for merchant acquiring. Stancer also implements strong customer authentication (3DS) to comply with EU regulations. The site highlights on-demand signing and subscription billing but does not mention a founding year or headquarters.