Proton Mail

 Proton Mail ensures that emails are fully encrypted before they leave the sender’s device and can only be decrypted by the recipient. This means even Proton Mail itself cannot access your messages, making it one of the most secure email services available. 

Unlike traditional email providers that monetize user data, Proton Mail does not track emails or serve ads. It is funded by premium users and donations, ensuring that user privacy remains the top priority.

 The platform is open-source, allowing independent security audits to verify its safety. Additionally, Proton Mail uses zero-access encryption, which ensures that only the intended recipient can read the email, even if the servers are compromised.