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PagerTreeSIGNL4
Paid

Subscription service; plans are listed on its pricing page.

 Paid

Commercial subscription service; see the SIGNL4 website for plans.

Android, iOS, Web Android, iOS, Web
  • On-call schedules with escalation layers
  • Notifications by push, email, SMS, voice and chat
  • Alerts by push, text, voice and email with escalation
  • On-call scheduling and call routing in one service
  • Hosted service only, with no self-hosted option
  • Aimed at teams rather than individuals
  • Hosted commercial service rather than self-hosted software
  • Aimed at teams and organisations, not individuals
Downloadable app, Hosted service Downloadable app, Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Needs internet Not stated if it works offline

Checked September 24, 2026

Checked October 1, 2026

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