rhubarbe

Nice work, I really like it!
Switzerland is not in the EU though, I wouldn’t say Proton Mail is EU-Sovereign.

Thank you for posting, I didn’t know there was a EU instance. I’ve just applied the procedure and successfully migrated!

I haven’t checked the competition to be honest. Mistral is good enough for my needs.
Are others that much better?

Breizh Cola is a nice exact equivalent: https://www.breizhcola.bzh/

My preference goes for tap water obviously but alternatively I just use an organic concentrated soda juice (such https://www.bigallet.fr/produit/sirop-de-cola-bio/ ).