GMO Epsilon is a payment gateway from GMO Epsilon Inc., part of the GMO Internet Group. It lets small and medium-sized businesses accept credit cards, convenience store payments, carrier billing, and QR code payments with competitive transaction fees.

The service is designed for straightforward implementation by small e-commerce operators and individual entrepreneurs, with strong integration into Color Me Shop and other popular platforms for small businesses. It provides centralized management of online and physical store payments through a unified dashboard.

The platform supports 3D Secure authentication to add cardholder verification during transactions, helping reduce fraud and chargebacks while meeting card issuer security requirements.

Merchants can accept QR code payments from Japanese mobile wallets through the platform’s multi-payment system for both online and physical store transactions.

Businesses can integrate payment processing through an API, enabling custom payment flows while the service also provides simple integration options for merchants without development resources.