# Merchants

- [Start using our API](/merchants/start-using-our-api.md): Start using Known.Email at your website or application
- [Allow users to enter without passwords!](/merchants/allowing-users-to-enter-a-new-saas.md): All Internet offedrings ... a SaaS application, desktop application, mobile app, etc. can benefit from our system!
- [Integrating known.email on top of other solutions](/merchants/integrating-known.email-on-other-membership-systems.md): What to do if you as a merchant was using another solution?