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SIGNL4Xurrent IMR
Paid

Commercial subscription service; see the SIGNL4 website for plans.

 Paid

Commercial hosted service with self-serve sign-up.

Android, iOS, Web Web
  • Alerts by push, text, voice and email with escalation
  • On-call scheduling and call routing in one service
  • Alerts by phone, SMS, push, email, Slack and Microsoft Teams
  • On-call schedules, escalation and playbooks in one place
  • Hosted commercial service rather than self-hosted software
  • Aimed at teams and organisations, not individuals
  • Hosted only, with no self-hosted option
  • Recently renamed, so documentation may use both names
Downloadable app, Hosted service Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Not stated if it works offline Needs internet

Checked October 1, 2026

Checked September 23, 2026

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