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signal-cli vs Signal CLI REST API: catalog facts
signal-cli	Signal CLI REST API
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free to run yourself.
Windows, macOS, Linux, Command line	Self-hosted
Provides a daemon interface for notification integrations.	Send Signal messages from any script over HTTP Ships as a Docker image with a Compose file
Requires a registered or linked Signal account.	Needs a phone number registered with Signal Unofficial client built on signal-cli, not from Signal itself
Downloadable app	Self-hosted
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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