FlowCrypt
A browser extension that adds OpenPGP encryption for sending and receiving email in Gmail.
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About FlowCrypt
FlowCrypt brings PGP encryption into the Gmail web interface. After installing the Chrome extension you can send and read encrypted emails and attachments without leaving Gmail, and the setup is designed to take about a minute. Other platforms are listed on the download page.
Businesses can also use an email encryption enterprise server and a Google Workspace key manager integration. It suits Gmail users who want PGP without managing a separate mail client.
Strengths
- Works inside the normal Gmail interface
- Encrypts both messages and attachments
- Quick setup compared with traditional PGP tools
- Business options with Google Workspace key management
Limitations
- Built around Gmail rather than other mail providers
- Business features require a paid plan
Details
- Pricing
- FreemiumFree extension for individuals, with paid business plans listed on the pricing page.
- License
- Proprietary
- Developer
- FlowCrypt
- Platforms
- Browser extension
- How it runs
- Browser extension
- Works offline
- No
- Best suited for
- Gmail users who want PGP encryption without a separate mail client
- Categories
- Messaging, Browser tools, Encryption tools
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to FlowCrypt
Compare allSoftware that can replace FlowCrypt for an important use case, and what changes if you switch.
Mailvelope
Browser extension that adds OpenPGP encryption to webmail.
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.
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.
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.
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.
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 necessarily a direct replacement.
OpenKeychain
An open-source Android app that manages OpenPGP keys and encrypts, decrypts and signs messages and files.
GnuPG
Complete free implementation of the OpenPGP standard.
Hushmail
An encrypted email service with secure forms and e-signatures, aimed at healthcare and small practices.
Sequoia PGP
An OpenPGP implementation in Rust with the sq command-line tool for encrypting, signing and managing keys.
