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GoAlert vs SIGNL4: catalog facts
GoAlert	SIGNL4
Free Free and open source; you host it yourself.	Paid Commercial subscription service; see the SIGNL4 website for plans.
Web, Self-hosted	Android, iOS, Web
On-call rotations, schedules and escalation policies Integrations with Grafana, Prometheus, Site24x7, Sensu and email	Alerts by push, text, voice and email with escalation On-call scheduling and call routing in one service
You must host and maintain the server yourself Integration list is narrower than large commercial services	Hosted commercial service rather than self-hosted software Aimed at teams and organisations, not individuals
Self-hosted	Downloadable app, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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