I have no affiliation, just found them this week, but https://psono.com/ exists. So 1 and 2 are met and 3 is half-way there maybe? It's a self-audit but they have been around a while. Apache2 licensed.
Again, I literally found them the other day, and other than a cursory check to make sure the UI/UX is friendly enough to compete with BW or 1P, I haven't had a chance to look through their code at all yet. I have no idea if the promises they document are met.
Hi, Sascha here, the main developer behind Psono. Psono has been audited multiple times so far, usually on a yearly bases. The last one here https://psono.com/blog/security-audit-2024 (you will also find a link to the audit itself)
Again, I literally found them the other day, and other than a cursory check to make sure the UI/UX is friendly enough to compete with BW or 1P, I haven't had a chance to look through their code at all yet. I have no idea if the promises they document are met.