alertescalation.com Add your tool
Lists / On-call and alert escalation

Open source on-call tools in 2026

Rotations, escalation policies and paging. These tools decide who is on call now and who is notified next when nobody acknowledges. This list has 5 on-call tools. Of these, 5 are open source, 5 have a free plan and 5 can be self-hosted. Checked by hand on 30 September 2026.

  1. 1

    Cabot

    Self-hosted monitoring and alerting app that watches Graphite metrics, Jenkins jobs and HTTP endpoints and alerts the person on duty by phone, SMS or email.

    Free Open source (MIT) Self-hosted maintenance On-call schedulesPhone and SMSUptime checks
  2. 2

    GoAlert

    Open source on-call scheduling, escalation and paging service built at Target, with SMS and voice through Twilio, a web UI and a GraphQL API.

    Free Open source (Apache-2.0) Self-hosted On-call schedulesEscalation policiesPhone and SMS
  3. 3

    Grafana OnCall OSS

    Self-hosted edition of Grafana OnCall with schedules, escalation chains and alert grouping. No longer developed; Grafana Cloud IRM is the supported successor.

    Free Open source (AGPL-3.0) Self-hosted archived On-call schedulesEscalation policiesAlert routing
  4. 4

    Iris

    LinkedIn's open source paging engine: escalation plans that deliver messages by email, Slack, SMS and phone call. Pairs with LinkedIn Oncall for schedules.

    Free Open source (BSD-2-Clause) Self-hosted Escalation policiesPhone and SMSNotifications
  5. 5

    LinkedIn Oncall

    Open source on-call scheduler from LinkedIn with round-robin rotations, shift swaps and overrides, and shift reminders. Paging is handled by its sibling project Iris.

    Free Open source (BSD-2-Clause) Self-hosted On-call schedulesNotifications

Side by side

Tool Pricing Free plan Open source Self-hosted On-call schedulesLayered or follow-the-sun schedulesOverrides and swapsEscalation policiesEscalation repeatsPhone call alertsSMS alertsMobile appAcknowledge from chatHeartbeat checksAlert groupingMaintenance windows
Cabot Free Yes Yes Yes NoNo---YesYesNo----
GoAlert Free Yes Yes Yes YesYesYesYesYesYesYesNoYesYesYesYes
Grafana OnCall OSS Free Yes Yes Yes YesYesYesYesYesYesYesYesYesYesYesYes
Iris Free Yes Yes Yes NoNoNoYes-YesYesYes----
LinkedIn Oncall Free Yes Yes Yes YesYesYesNoNoNoNoNoNoNoNoNo

Yes: confirmed in the tool's documentation. No: documented as not offered. -: not confirmed. Plans and prices change; check each tool's own site before you decide.

More lists