Solutions for selling desktop software outside of an app store?

Hi @adamnemecek! Regarding your question: You can read more about licensing here - https://www.pcisecuritystandards.org/. It's one of the top security standards, and any merchant should consider it to protect his own and his clients' payment data. I can't recommend you anything regarding a specific license for a product you sell though. Regardin payment processing: the choice of a provider toally depends on your monthly sales volume. Typically, smaller businesses opt for popular payment service provider options like PayPal or Stripe, while medium and larger businesses either go for a white-label payment gateway or build their own one. Building your own payment gateway requires initial development fund for the team of paytech experts but in the long run, you'll be able to save a ton with it. I like this piece covering this issue - https://softensy.com/how-to-create-payment-gateway-and-becom.... A white-label payment solution, in its turn, allows to fully brand the payment gateway. So, the merchant will strengthen his image thanks to the state-of-the-art technology developed and maintained by the third-party provider. The fees vary depending on the industry. Here's an example of a white-label gateway - https://get-started.akurateco.com/. You can request test access to the platform to see what it looks like inside. Can't really help with the delivery tools: don't have much experience with it. I hope this helped!