(Relay engineer here.)

Note that that's for the Premium service - the free tier is available in most countries. We're hoping to expand to more countries in the future.

Tried signing up for Relay Premium (from France), Stripe is telling me that "The currency of this subscription isn't valid for the country associated with your payment"...

Hi! I'm the Product Manager on Relay. I'm sorry about this! We've deployed a fix this morning. Let us know if you're still having this issue and we can help troubleshoot it further.

I'm having same issues with PayPal as option, coming from Finland

Edit: looking FAQ it appears it's not even available in Finland, I'm active user of relay and i saw the upgrade option, not reading the FAQ at all.