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

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