Stripe is one of the leading software platforms for online payment processing. Calenso uses Stripe for two processes:

  1. On the one hand, Calenso subscriptions are charged monthly to partners' credit cards via Stripe. One-off purchases such as product training or account creation are included with one-off payments.
  2. On the other hand, Calenso Partners can create a Stripe account and link it to Calenso. When connecting, the Partner allows Calenso to charge customers' credit cards on behalf of the Partner. The money collected will then be transferred to the Calenso Partner's account, after deduction of Stripe fees, where it can then be transferred, for example on a monthly basis, to the company's bank business account. Calenso retains 50 centimes in transaction fees per customer transaction.

It is important to note that Calenso never stores credit card information on its own servers. For each credit card registered with Stripe, Calenso receives a so-called card token with which charges can be made. This means that even if Calenso's servers are compromised in the event of a hacker attack, no credit card information can fall into the wrong hands.

Furthermore, credit cards are correctly authorised by means of Strong Customer Authentication (SCA) with 3D Secure and 3D Secure 2.