FlowCrypt is described as '(formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted' and is an app in the security & privacy category. There are more than 25 alternatives to FlowCrypt for a variety of platforms, including Web-based, Mac, Windows, Linux and Android apps. The best FlowCrypt alternative is Proton Mail, which is both free and Open Source. Other great apps like FlowCrypt are Tuta Mail, mailbox, Mailvelope and QRYPTY MAIL.
Proton Mail provides secure email services with end-to-end encryption, ensuring data protection. Swiss-based and outside US jurisdiction, it offers a free version to champion privacy as a human right. Fully accessible on any device.
Switzerland
Offers comprehensive encryption for email, calendar, and contacts with zero personal info required. Built on open source, install via Play Store, F-Droid, or APK, with Tor and VPN support. Both free and paid plans; utilizes quantum-resistant encryption ensuring privacy-focused, anonymous usage.
Germany
EU
E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).
GermanyEU
Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard.
GermanyEU
QRYPTY Mail is a privacy-first email service that requires zero personal data to register. No password, no phone number, no recovery email — signup takes 10 seconds and gives you a random 32-character access code that only you know.
Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey. It enables you to write and receive email messages signed and/or encrypted with the .
Free anonymous email platform offering automatic PGP encryption, dedicated Tor .onion address, strict no-logs policy, no personal data or phone required, and anonymous payments through Monero, Bitcoin, Ethereum, or credit card. Compatible with Tor and web browsers.
United States
Protect PII and sensitive information in any web app. Professional-grade encryption that fits perfectly into your team's workflow.
PolandEU
GPGMail is a PGP plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the OpenPGP standard.
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
Switzerland
Runbox offers email hosting, domain hosting, and web hosting services, as well as custom-made email solutions
Norway
