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FlowCrypt vs Free-GPGMail: catalog facts
FlowCrypt	Free-GPGMail
Freemium Free extension for individuals, with paid business plans listed on the pricing page.	Free Free and open source under the GPL-3.0 license.
Browser extension	macOS
Works inside the normal Gmail interface Encrypts both messages and attachments	OpenPGP encryption and signing inside Apple Mail No support plan purchase needed
Built around Gmail rather than other mail providers Business features require a paid plan	macOS and Apple Mail only Unofficial build that may lag behind GPGTools releases
Browser extension	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.