IOS, ANDROID, WEB
1.7.0, (ANDROID/IOS), 3.11 (WEB)
This email service is based in Switzerland and it has a 2-step verification. With the first required passwords you can log into your ProtonMail account, while the other serves to encrypt and decrypt your messages. The company’s servers are located in Switzerland under 1,000 meters of granite rock in a bunker, so your encrypted data is stored safe. ProtonMail has a free version that provides 500 MB of storage space and 150 messages per day. If you switch to ProtonPlus you’ll have 5 GB space and you’ll be able to send 300 messages per hour and 1000 per day. The ProtonMail Visionary plan offers 20 GB of storage with unlimited messages.