Alternatives to FlowCrypt

A browser extension that adds OpenPGP encryption for sending and receiving email in Gmail. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as FlowCrypt.

  • Mailvelope

    Browser extension that adds OpenPGP encryption to webmail.

    FreeOpen sourceBrowser extension

    Mailvelope is a free, AGPL-3.0 open-source browser extension that adds OpenPGP to a defined list of webmail sites rather than only Gmail, with keys stored in the browser.

  • Proton Mail

    Official Proton Mail apps for reading and sending end-to-end encrypted email on phones, desktops and the web.

    FreemiumProprietaryWindowsmacOSLinuxAndroidiOSWeb

    Proton Mail replaces Gmail with its own end-to-end encrypted email service and apps on every major platform, but it only works with a Proton account and desktop apps need a paid plan.

  • Mailfence

    Encrypted email service from Belgium with OpenPGP support, calendars, contacts and document storage.

    FreemiumProprietaryAndroidiOSWeb

    Mailfence is a hosted Belgian email service with OpenPGP encryption and signing in the browser, plus calendar, contacts, documents and IMAP access, so you move away from Gmail.

  • GPG Suite

    An OpenPGP toolkit for macOS for encrypting, signing and verifying files and email.

    FreemiumProprietarymacOS

    GPG Suite moves OpenPGP email to Apple Mail on macOS only, with a key manager app, and its GPG Mail plugin requires a paid subscription.

  • Gpg4win

    GnuPG packaged for Windows with the Kleopatra key manager, for signing and encrypting files and email.

    FreeOpen sourceWindows

    Gpg4win is free and open source for Windows, bringing OpenPGP email to Outlook through GpgOL and key management through Kleopatra instead of a Gmail extension.

Similar software

Related functionality, not a direct replacement.