Callu
Callu is a free, open-source incident management and on-call platform designed to run on an organisation’s own infrastructure as a single-tenant deployment.
What Callu is
Callu is a free, open-source incident management and on-call platform designed to run on an organisation’s own infrastructure as a single-tenant deployment. It is MIT licensed, has no per-seat fees, and lists the cost as $0 per seat. Incident tools include a six-state lifecycle, append-only timeline, notes, manual escalation and duplicate suppression. Schedules handle timezone-aware rotations and overrides, while ordered escalation policies can route to users, schedules or teams. Alerts can arrive through service and application webhooks, with API keys, optional HMAC, rate limiting and JSONPath templates. Integrations include Prometheus and Grafana; notification channels include email, SMS, voice, in-app push, Slack, Teams and webhooks. Phone paging and per-incident WebRTC war rooms are included, as is shipped self-hosted Asterisk voice paging. Callu also provides public status pages, service health checks, uptime history, maintenance windows, reporting and post-incident reviews. Deployment requires Docker and Docker Compose and uses PostgreSQL. A mobile app is listed as planned, and mandatory webhook and callback HMAC is still maturing; HMAC is currently optional.
Good
- MIT licensed with no per-seat fees
- Timezone-aware schedules and escalation policies
- Multiple alert and notification integrations
- Public status pages and post-incident reviews
Watch out
- Requires Docker and Docker Compose
- Mobile app is only planned
- Webhook and callback HMAC remains optional
Who it suits
Callu is aimed at self-hosting, regulated, air-gapped and sovereignty-conscious teams that want to operate incident and on-call tooling on their own infrastructure. It requires Docker and Docker Compose for the stated quick start.
Verdict
Callu offers self-hosted incident response and on-call capabilities without per-seat fees. Teams should account for its Docker-based deployment requirement and the mobile app’s planned status.
Plans and prices
From Callu's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free & open source | Free | MIT licensed · self-hosted · no per-seat fees · no limits stated |
The facts
Each one read from Callu's own pages, with the date it was checked.
What it does
- Alert ingestion
- Callu accepts per-service and application webhooks, with API keys, optional HMAC, rate limiting, and JSONPath templates.checked 8 Oct 2026
- Data control
- Callu is designed for one deployment per organization, and the site says telemetry can be sent to the operator’s own Jaeger instance or turned off.checked 8 Oct 2026
- Deployment
- The quick start requires Docker and Docker Compose and describes a seven-service Docker stack.checked 8 Oct 2026
- Deployment requirements
- The quick start requires Docker and Docker Compose and uses published images; PostgreSQL is part of the architecture.checked 8 Oct 2026
- Incident management
- Features include a six-state incident lifecycle, an append-only timeline, notes, manual escalation and duplicate suppression.checked 8 Oct 2026
- Integrations
- Inbound alerts support Prometheus, Grafana, generic JSON and webhooks; organization notification channels include Slack, Teams and webhooks.checked 8 Oct 2026
- Language
- The site says the interface is available in English and Turkish, with a per-user locale preference.checked 8 Oct 2026
- License
- Callu is free and open source under the MIT License.checked 8 Oct 2026
- License and audience
- Callu is MIT licensed and describes itself as built for self-hosting, regulated, air-gapped, and sovereignty-conscious teams.checked 8 Oct 2026
- Mobile
- A mobile app is listed as planned on the roadmap.checked 8 Oct 2026
- Notifications
- Notification channels include email, SMS, voice, in-app push, Slack, Teams and webhooks.checked 8 Oct 2026
- On-call
- Schedules support timezone-aware rotations and overrides, with ordered escalation policies for users, schedules or teams.checked 8 Oct 2026
- Pricing
- The site says there are no per-seat fees and lists $0 per seat.checked 8 Oct 2026
- Product
- Callu is a self-hosted, single-tenant incident management and on-call platform.checked 8 Oct 2026
- Reporting
- Reporting includes MTTA and MTTR summaries, incident trends, severity distribution, service uptime, and team performance.checked 8 Oct 2026
- Roadmap limits
- The site lists a mobile app as planned and says mandatory webhook and callback HMAC is still maturing; HMAC is currently optional.checked 8 Oct 2026
- Security
- The site describes encrypted provider, SMTP and SIP credentials, invitation-only onboarding, rotating refresh cookies and a tamper-evident audit trail.checked 8 Oct 2026
- Status and services
- The platform includes a service dependency graph, HTTP health checks, public status pages, uptime history and maintenance windows.checked 8 Oct 2026
- Status pages
- Callu supports public status pages with components, updates, uptime history, and email subscribers.checked 8 Oct 2026
- Telemetry
- OpenTelemetry exports can go to the operator's Jaeger instance, or be turned off; the site says there is no phone-home telemetry.checked 8 Oct 2026
- Voice and video
- Phone paging and per-incident WebRTC war rooms are included as core capabilities, and self-hosted Asterisk voice paging is listed as shipped.checked 8 Oct 2026
- What it does
- Callu is a single-tenant incident management and on-call platform designed to run on your own infrastructure.checked 8 Oct 2026
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