How are you handling this?

https://stripe.com/legal/marks

Use or incorporate any of our Marks in your own trademark, service mark, trade dress, trade name, website name, domain name, corporate name, or social-media handle (or any other source-identifying use), or use any trademark, service mark, trade dress, trade name, website name, domain name, corporate name, or social-media handle (or any other source-identifying use) that is likely to be confused with any of our Marks.

It's a concern we raised while starting the project but the other services I mentioned also had Stripe in their names and have been operating for a few years. Because our product is so connected to Stripe we felt that it was necessary to make its purpose clear so we took the gamble and added to our content that we are not affiliated to them. If we have to change the name in the future that is something we will have to deal with when the time comes.

No you're 100% getting an email from Stripe legal TODAY. You took their name, colors, branding... It's a field day for them

That’s a pretty bold take. I bet they’re a few months out. And I don’t think it makes sense to characterize it as a “field day” for stripe’s legal department - trademark enforcement isn’t a profit center. More likely a lightly edited boilerplate letter and a timeline to comply, which GP has already acknowledged.