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nospeak vs 0xchat: catalog facts
nospeak	0xchat
Free Free and open source.	Free The homepage does not list any price or paid tier.
Android	Android, iOS
No central server; uses Nostr relays End-to-end encrypted conversations	No phone number or email address needed, only a Nostr private key End-to-end encrypted direct messages and private groups
Small project with a small user base Requires contacts who also use Nostr	Losing the private key means losing the identity Contacts need a Nostr client to reach you
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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