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Guerrilla Mail vs Addy.io: catalog facts
Guerrilla Mail	Addy.io
Freemium Disposable addresses are free; using your own domain costs 9.99 USD per year.	Freemium Free tier available, open source software formerly known as AnonAddy.
Web	Web, Self-hosted, Browser extension
No signup; address is ready immediately Choice of several domains	Unlimited aliases available for free Open source, with the option to self-host your own instance
No encryption; inboxes are not private Many sites block its domains	Some advanced features are limited on the free tier Requires trusting or self-hosting the forwarding infrastructure
Web application	Web application, Self-hosted, Browser extension
Closed source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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