I don't think it should be open source. But it's very expensive to integrate it and it's Ogone all over again ( most expensive option = the Belgian one) ~3€ /

I don't think it should be open source. But it's very expensive to integrate it and it's Ogone all over again ( most expensive option = the Belgian one) ~3€ / user/year for the most complete option for ( what is basically) a login verification.