Alertmanager
Alertmanager: A self-hosted Prometheus component for grouping, routing and managing alerts. Ranked #6 of 23 in IT Alerting Software by our editors (8.7/10); pricing: Free plan; best for teams routing alerts from self-hosted Prometheus.
At a glance
- Editor score8.7 / 10
- PricingFree plan
- Best forTeams routing alerts from self-hosted Prometheus
- Free planYes
- Paid fromFree
- Founded2012
- Facts checked24 Sep 2026
Where it wins
- Deduplicates and groups alerts before notification.
- Routing trees direct notifications to configured receivers.
- Supports silencing, inhibition and high-availability clustering.
Where it doesn't
- No native on-call scheduling.
- Requires self-hosted deployment and configuration.
- Support is through community resources and documentation.
Our verdict on Alertmanager
Alertmanager handles alerts in the Prometheus ecosystem, receiving them from Prometheus and other clients before sending notifications to configured receivers. It is a fit for teams that operate their own monitoring infrastructure and need control over how alert notifications are organized and routed. Available as self-hosted binaries and Docker images, it is open source and has a free self-hosted option. Its focus is alert handling rather than managing the full on-call workflow.
Routing trees let operators define grouping, timing and receivers, while deduplication and grouping reduce repeated or fragmented notifications. Silences can be managed through the web interface, and inhibition rules suppress related alerts. Notification integrations include email, Slack, PagerDuty and webhooks; the wider integration set also includes Amazon SNS, Discord, Jira, Microsoft Teams, OpsGenie and Telegram. Configuration can be reloaded through SIGHUP or the HTTP API, and high-availability clustering is available. This feature set suits teams that want to shape alert delivery within their existing Prometheus setup.
Alertmanager is self-hosted, so teams need to manage deployment and configuration themselves. According to its published product information, support is through community resources and documentation; it is not positioned as a paid service with vendor plans. The main boundary is on-call coordination: Alertmanager routes notifications but does not provide native on-call scheduling. Choose it when alert routing, deduplication and silencing are the priority and the team can operate the component. Teams seeking scheduling as part of the same product should consider an alternative or pair their alert routing with a separate tool.
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Alertmanager pricing
Alertmanager fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| On-call scheduling | Not verified |
| Escalation policies | Not verified |
| Alert acknowledgment | Not verified |
| Incident status pages | Not verified |
| Alert source integrations | Not verified |
| Mobile apps | Not verified |
| Deployment | Self-hosted |
| Platforms | Web, Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 17 integrations: Amazon SNS, Discord, Email, incident.io, Jira, Mattermost … See all → |
| Pricing | Free plan |
| Website | prometheus.io |
| Facts checked | 24 Sep 2026 |
Alertmanager integrations
Alertmanager lists 17 integrations on its own site.
- Amazon SNS
- Discord
- incident.io
- Jira
- Mattermost
- Microsoft Teams
- OpsGenie
- PagerDuty
- Pushover
- Rocket.Chat
- Slack
- Telegram
- VictorOps
- Webex
- Webhook
See all Alertmanager integrations →
Alternatives to Alertmanager
- PagerDutyA broad incident-response suite with extensive integrations, mobile apps, and a free tier.9.4
- OpsgenieEstablished on-call alerting with flexible schedules, escalations, and multichannel notifications.9.2
- Splunk On-CallA low-cost, established on-call platform with scheduling, routing and mobile response.9.0
See all Alertmanager alternatives →
Alertmanager vs the competition
- Alertmanager vs PagerDuty
- Alertmanager vs Opsgenie
- Alertmanager vs Splunk On-Call
- Alertmanager vs AlertOps
- Alertmanager vs Everbridge IT Alerting
- Alertmanager vs xMatters
Compare Alertmanager with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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