The most advanced payment gateway integration for Sylius




Mollie specializes in simplifying the world of online payments for webshop owners. It is one of Europe’s fastest-growing fin-tech companies. They are offering suitable and secure solutions that make processing payments easier and build innovative products to serve many customers efficiently. Mollie’s goal is to become ‘Europe’s most loved payment service provider’. You can find more information about Mollie on their official website:



Mollie reached us because they were interested in supporting Sylius and becoming the leading PSP on this platform. Their packages and plugins are also completely open-source, freely available, and easy to integrate into current developments close to our mission. As we did many open-source plugins for Sylius eCommerce Platform, Mollie decided to entrust the project to us.
We were requested to support them in the expansion of their offer to foreign markets. Knowing the value of Sylius on the French market and its growing popularity as a competitive solution for eCommerce, they decided to cooperate with us to create the best payment gateway for Sylius in Europe (later – in the world).
“Creating the most loved payment gateway on Sylius” – was the main challenge of this project.
The Sylius platform provides a simple payment API that enables webshop and app builders to implement all relevant international and local payment methods. To implement it in Sylius, we had to create an API integration. As Mollie is rich in features, we had to implement those features to fit as a Sylius plugin, so that after successful integration, it allows:

  • Offering all major payment methods
  • Paying in different currencies
  • API integration
  • Managing (partial) shipments and orders by merchants
  • Adding additional payment methods and managing them per country
  • Adjusting the appearance for each payment method
  • Refunding orders and recurring payments
  • Guarantee of support above a specific version of Sylius

Our missions
successfully accomplished


“Creating the most loved payment gateway on Sylius” 

  • The most advanced PSP integration for Sylius
  • Management of payment methods
  • Partial shipment, partial refunds
The cooperation between Mollie and Bitbag has been a very fruitful and exciting experience. From the first conversations where we could align the goals and ambitions of both Bitbag and Mollie, we grew into a relation of continuous improvement. Currently, we can definitely say that we are the best possible Payment Service provider within the Sylius platform, thanks to the experience of Bitbag.
Merijn van Zuidam
Lead Technical Partner Manager
at Mollie B.V.

Want to implement this payment method or create a new integration in your eCommerce?