10 Best Open-Source On-Call Management Tools
Before the list: these ten tools solve different slices of the same broader problem, and conflating them is how teams end up self-hosting three separate projects to replicate what one commercial platform does out of the box. Three categories show up below:
- Scheduling + escalation platforms manage who’s on call, rotate them, and escalate a page through a policy until someone acknowledges it.
- Alert routers take signals from monitoring systems, deduplicate and classify them, and decide who or what gets notified, without necessarily owning the schedule itself.
- Monitoring systems with alerting built in generate the signals in the first place and can notify people directly, but weren’t built primarily as on-call platforms.
- Most lists of “open-source on-call tools” mix genuinely different categories: full scheduling-plus-escalation platforms, alert routers that assume you bring your own scheduling, and monitoring systems with paging bolted on. This list says which is which.
Key takeaways
- One thing worth knowing before you pick: Grafana OnCall, previously a common default, was archived in March 2026 and isn’t a safe choice for a new deployment, it’s covered below along with the rest.
- FluidifyAI Regen is the only entry here that covers scheduling, escalation, and incident coordination in one self-hosted, actively maintained package, with no per-seat cost, if you want one tool instead of stitching together two or three.
1. FluidifyAI Regen
Category: full platform. Perfect for: teams that want scheduling, escalation, and incident coordination in one self-hosted tool without stitching together two or three open-source projects.
Notable features
- Alert ingestion from Prometheus Alertmanager, Grafana, AWS CloudWatch, or a generic webhook, with pattern matching that learns from historical incidents.
- On-call scheduling with layer-based rotations, overrides, holidays, exceptions, and leave, with timezone and multi-language support.
- Multi-step escalation policies with configurable timeouts per step.
- Immutable incident timelines with bidirectional Slack and Microsoft Teams sync, including bot commands and Adaptive Cards.
- AI-generated incident summaries and post-mortems, bring-your-own-key with OpenAI, Anthropic, or Ollama, so nothing leaves your infrastructure that you don’t choose to send.
- Free SSO/SAML on the self-hosted tier.
- One-click migration from Grafana OnCall, Opsgenie (sunsetting April 2027), or PagerDuty, useful if you’re moving off an archived or sunsetting tool rather than building from scratch.
Where it falls short: a fuller platform than teams who just want a minimal scheduling-and-paging backbone need, more moving parts to run than GoAlert’s single-binary footprint.
Pricing: free under AGPLv3 self-hosted, unlimited users and schedules. Managed Cloud starts at $100/month (Pro), $200/month (Business). Enterprise is a custom contract for SCIM, audit logs, and SOC 2 requirements. Full pricing breakdown if you want the numbers at your own team size.
For the fuller picture beyond this entry, see What Is FluidifyAI Regen?
2. GoAlert
Category: scheduling + escalation. Perfect for: teams that want a minimal, self-hosted paging backbone and are comfortable building incident coordination separately.
Notable features: built by Target’s engineering team, ships as a single Go binary with a PostgreSQL backend, one of the simpler self-hosted deployments on this list. Handles rotations, escalation policies, and multi-channel notification (voice, SMS, push) cleanly.
Where it falls short: no incident coordination layer, no timeline, no post-mortem tooling, that’s a deliberate scope choice, not a bug, but it means GoAlert alone doesn’t replace a full incident platform. Voice and SMS require your own Twilio account with real credentials and funds; if that’s misconfigured, notification rules can silently fail to fire rather than erroring loudly, worth testing before you rely on it.
Pricing: free, self-hosted only, no managed offering.
3. LinkedIn Oncall + Iris
Category: scheduling + escalation, split across two repositories. Perfect for: teams with the engineering capacity to integrate and operate two separate open-source projects for the sake of using something battle-tested at LinkedIn’s scale.
Notable features: Oncall handles the scheduling calendar, including follow-the-sun rotations. Iris is the escalation engine, built to process very high message volume reliably. Both are genuinely proven at scale internally at LinkedIn.
Where it falls short: the two projects need to be wired together and operated as separate services, and community activity has slowed considerably since their initial release. Expect to do real integration work, not a docker-compose-and-go setup.
Pricing: free, self-hosted only.
4. Keep
Category: alert router / AIOps. Perfect for: teams whose main pain point is too many duplicate and unrelated alerts arriving from multiple monitoring sources, before the question of who gets paged even comes up.
Notable features: correlates and deduplicates alerts across sources, with workflow automation that can trigger notifications, tickets, or other actions based on rules you define.
Where it falls short: on-call scheduling is present but secondary to its correlation and workflow features, not a full rotation-and-escalation system on its own.
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Pricing: free, open-source, with a hosted option available.
5. Alerta
Category: alert router. Perfect for: teams that already have scheduling and escalation solved elsewhere and just need a central place to receive, deduplicate, and route alerts from multiple monitoring sources.
Notable features: a clean, purpose-built alert management API and UI that many other tools integrate with as a routing layer.
Where it falls short: no scheduling or escalation of its own; it’s a component you pair with something else, not a standalone on-call tool.
Pricing: free, self-hosted only.
6. Grafana OnCall
Category: scheduling + escalation. Status: archived: Grafana OnCall’s open-source project entered maintenance mode in 2025 and was formally archived in March 2026. Existing self-hosted deployments keep running, but there’s no ongoing development, and starting a new production deployment on it in 2026 means adopting a project with no active maintainer.
Notable features (historical): tight integration with Grafana dashboards and alerting, useful if your monitoring stack was already Grafana-centric.
Where it falls short now: it’s the reason this list exists in its current form. Teams that built their on-call setup around Grafana OnCall are the exact audience evaluating GoAlert, Regen, and the LinkedIn tools as a replacement in 2026.
Pricing: free, self-hosted, archived, so no future pricing changes, but also no future development.
7. Cabot
Category: monitoring + alerting. Perfect for: small teams that want a lightweight, self-hosted check-and-alert system and don’t need a dedicated on-call platform.
Notable features: built by Arachnys as a self-hosted alternative to combining Nagios-style checks with a paging layer, simple to run.
Where it falls short: development activity has been minimal for an extended period; treat it as a small, stable utility rather than an actively evolving platform, and verify current maintenance status before depending on it.
Pricing: free, self-hosted only.
8. Prometheus Alertmanager + Karma
Category: alert router. Perfect for: teams already running Prometheus who need alert grouping, silencing, and routing, with a usable dashboard on top (Karma) instead of Alertmanager’s bare UI.
Notable features: Alertmanager’s routing tree and silencing are mature and widely used; Karma adds a much more usable interface for triaging active alerts across multiple Alertmanager instances.
Where it falls short: this pairing routes alerts, it doesn’t schedule who’s on call or manage escalation timeouts. Most teams pair it with a dedicated on-call tool downstream.
Pricing: free, self-hosted only, part of the CNCF ecosystem.
9. Zabbix
Category: monitoring + alerting. Perfect for: infrastructure teams that want monitoring and basic escalation in one system and don’t need dedicated on-call scheduling software.
Notable features: mature monitoring platform with configurable escalation trees for notifications tied directly to check failures.
Where it falls short: escalation here is a monitoring feature, not a purpose-built on-call system; no shift rotation concept, no override handling, no incident timeline.
Pricing: free, open-source, GPLv2.
10. Icinga 2
Category: monitoring + alerting. Perfect for: teams already invested in the Nagios/Icinga ecosystem who want notification rules alongside their existing checks rather than a separate on-call platform.
Notable features: flexible notification rules tied to host and service checks, mature plugin ecosystem.
Where it falls short: same gap as Zabbix, monitoring-native alerting rather than dedicated scheduling and escalation.
Pricing: free, open-source, GPLv2.
Why is FluidifyAI Regen the top pick on this list? It’s the only entry that covers scheduling, escalation, and incident coordination, with AI-generated post-mortems, in one self-hosted, actively developed package and no per-seat pricing. Everything else here either does less (GoAlert, the alert routers) or wasn’t built as a dedicated on-call platform in the first place (the monitoring tools).
Which of these has the lowest operational overhead to self-host? GoAlert, by design: a single binary plus PostgreSQL. Regen and Keep are close behind with straightforward container-based deployment. The monitoring-plus-alerting tools (Zabbix, Icinga 2) carry more operational weight because you’re running full monitoring infrastructure, not just an on-call layer.
Can I combine an alert router like Alerta or Karma with GoAlert? Yes, that’s a common pattern: use the router for deduplication and classification upstream, then hand the classified alert to a scheduling-and-escalation tool to decide who gets paged. It’s more moving parts to operate than a single platform, in exchange for choosing best-of-breed at each layer.
What’s the best open-source replacement for Grafana OnCall now that it’s archived? FluidifyAI Regen and GoAlert are the two actively maintained full or near-full alternatives; Regen adds incident coordination and AI post-mortems that GoAlert doesn’t attempt, GoAlert is the more minimal, single-purpose option. Grafana OnCall itself will keep running if you already have it deployed, but with no active development, security patches and bug fixes won’t be coming, treat it as a deprecation clock, not an emergency.
If the goal is one self-hosted tool that covers scheduling, escalation, and incident response without assembling two or three separate open-source projects, FluidifyAI Regen and GoAlert are the two to evaluate first, and the choice mostly comes down to whether you need incident coordination and AI post-mortems (Regen) or want the smallest possible footprint and are fine building coordination separately (GoAlert). If you’re migrating off an archived or sunsetting platform specifically, Regen’s 1-click migration from Grafana OnCall, Opsgenie, and PagerDuty is worth checking before you rebuild schedules by hand.
If you also want commercial platforms in the comparison, not just open-source, see our broader best on-call management tools for 2026.
Originally published at https://fluidify.ai on September 22, 2026.
