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Signal CLI REST API vs PushBits: catalog facts
Signal CLI REST API	PushBits
Free Free to run yourself.	Free Free to self-host; the source is published on GitHub.
Self-hosted	Linux, Self-hosted
Send Signal messages from any script over HTTP Ships as a Docker image with a Compose file	Uses Matrix, so no separate notification app is needed Lightweight Go server with a Docker image
Needs a phone number registered with Signal Unofficial client built on signal-cli, not from Signal itself	Marked as alpha software by its developers Requires a Matrix account and homeserver for delivery
Self-hosted	Self-hosted
Closed source	Open source
License not stated	License not stated
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 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.