Stripe, Paddle and Lemonsqueezy are good choices. Keep it simple in the beginning just set up subscriptions/billing and a few basic plans to get users signing

Stripe, Paddle and Lemonsqueezy are good choices. Keep it simple in the beginning just set up subscriptions/billing and a few basic plans to get users signing up and working out the flow since it sounds like your first time. Lemonsqueezy and Paddle handles taxes out of the box (Stripe is working on a tax solution). It sounds like most jurisdictions have thresholds you have to break before you have to pay sales tax. It varies greatly so it's probably worth a little extra cost to have that covered from the start. But early on I'm not sure it's completely necessary. What framework are you building on? Here are SaaS in a box billing/subscription tools for Rails and Laravel https://bullettrain.co/ https://bullettrain.co/ https://spark.laravel.com/ https://spark.laravel.com/ Good luck.