Much simpler than competitor, so my first choice.
API looks very good, even if I personally will not use it.
Initially wanted to pay by bank transfer, but the QR code was not displayed.
This was blocked by my AdBlocker, as it was embedded by Google.
After manual input was no instant bank transfer possible (from N26).
But all in all very good, I'll definitely use again
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Translation
However, if you send letters frequently, you do not have to put up with umpteen confirmations and mails, you can use the credit account for this purpose. Then letters are sent immediately, there is an overview of the sent letters including status and a summarized invoice once a month. We currently do not offer payment by direct debit.
Feel free to contact us for further feedback via contact form:
https://www.briefklick.de/kontakt