Callu

callu.app

Free plan
Web
API
Self-hosted

7.4 Club score Visit callu.app

What Callu is

Callu is a self-hosted incident management and on-call platform designed to run as a single deployment for one organization. It is free and open source under the MIT License, with no per-seat fees and a listed cost of $0 per seat. Incident tools include a six-state lifecycle, an append-only timeline, notes, manual escalation, and duplicate suppression. Schedules support timezone-aware rotations and overrides, while ordered escalation policies can target users, schedules, or teams. Alerts can arrive through service and application webhooks with API keys, optional HMAC, rate limiting, and JSONPath templates; Prometheus and Grafana are also listed integrations. Notifications include email, SMS, voice, push, Slack, Teams, and webhooks. Phone paging and per-incident WebRTC war rooms are included, along with self-hosted Asterisk voice paging. Callu also provides service dependency mapping, health checks, status pages, uptime history, maintenance windows, incident reports, and post-incident reviews. Its quick start requires Docker and Docker Compose and uses a seven-service stack with PostgreSQL. The mobile app is listed as planned, and mandatory webhook and callback HMAC is still maturing; HMAC is currently optional.

Who it suits

Callu is suited to self-hosting, regulated, air-gapped, or sovereignty-conscious teams that want incident and on-call coordination on their own infrastructure. Teams need Docker and Docker Compose for the described quick start.

Good to know, and what to watch

MIT licensed with no per-seat fees.
Timezone-aware schedules support overrides.
Includes phone paging and WebRTC war rooms.
Telemetry can go to the operator’s Jaeger instance or be turned off.
Includes public status pages and post-incident reviews.

Quick start requires Docker and Docker Compose.
Mobile app is planned, not listed as available.
Webhook and callback HMAC remains optional.

Plans

Every plan and price

Free & open source

Free

Free plan

The verdict

Callu covers alert intake, on-call escalation, incident coordination, status updates, and review in a self-hosted package. Its deployment requirements and planned mobile app are important considerations for teams evaluating how they will use it.

What the maker publishes

Alert ingestion: Callu accepts per-service and application webhooks, with API keys, optional HMAC, rate limiting, and JSONPath templates. source
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. source
Deployment: The quick start requires Docker and Docker Compose and describes a seven-service Docker stack. source
Deployment requirements: The quick start requires Docker and Docker Compose and uses published images; PostgreSQL is part of the architecture. source
Incident management: Features include a six-state incident lifecycle, an append-only timeline, notes, manual escalation and duplicate suppression. source
Integrations: Inbound alerts support Prometheus, Grafana, generic JSON and webhooks; organization notification channels include Slack, Teams and webhooks. source
Language: The site says the interface is available in English and Turkish, with a per-user locale preference. source
License: Callu is free and open source under the MIT License. source
License and audience: Callu is MIT licensed and describes itself as built for self-hosting, regulated, air-gapped, and sovereignty-conscious teams. source
Mobile: A mobile app is listed as planned on the roadmap. source
Notifications: Notification channels include email, SMS, voice, in-app push, Slack, Teams and webhooks. source
On-call: Schedules support timezone-aware rotations and overrides, with ordered escalation policies for users, schedules or teams. source
Pricing: The site says there are no per-seat fees and lists $0 per seat. source
Product: Callu is a self-hosted, single-tenant incident management and on-call platform. source
Reporting: Reporting includes MTTA and MTTR summaries, incident trends, severity distribution, service uptime, and team performance. source
Roadmap limits: The site lists a mobile app as planned and says mandatory webhook and callback HMAC is still maturing; HMAC is currently optional. source
Security: The site describes encrypted provider, SMTP and SIP credentials, invitation-only onboarding, rotating refresh cookies and a tamper-evident audit trail. source
Status and services: The platform includes a service dependency graph, HTTP health checks, public status pages, uptime history and maintenance windows. source
Status pages: Callu supports public status pages with components, updates, uptime history, and email subscribers. source
Telemetry: OpenTelemetry exports can go to the operator's Jaeger instance, or be turned off; the site says there is no phone-home telemetry. source
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. source
What it does: Callu is a single-tenant incident management and on-call platform designed to run on your own infrastructure. source

Checked against the maker's pages on 8 Oct 2026.