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ServerChan vs Signal CLI REST API: catalog facts
ServerChan	Signal CLI REST API
Free Registration is free according to the site.	Free Free to run yourself.
Web	Self-hosted
A single HTTP request is enough to send a notification Delivers to WeChat, WeCom, DingTalk and Feishu groups	Send Signal messages from any script over HTTP Ships as a Docker image with a Compose file
Interface and documentation are in Chinese Built around Chinese messaging platforms	Needs a phone number registered with Signal Unofficial client built on signal-cli, not from Signal itself
Hosted service	Self-hosted
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	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.