prometheus

    prometheus/alertmanager

    Prometheus Alertmanager

    monitoring
    alertmanager
    deduplication
    email
    hacktoberfest
    notifications
    Go
    Apache-2.0
    8.7K stars
    2.5K forks
    8.7K GitHub watchers
    Updated Nov 2, 2026
    View on GitHub

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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    3 releases in the last 90 days, the latest 4 days ago, with 392 contributors on GitHub.

    Use Cases & Benefits

    • Handles alerts from monitoring systems by deduplicating, grouping, and routing them to configured notification receivers.
    • Provides flexible alert routing and inhibition rules with support for multiple notification integrations and high availability clustering.
    • Use for centralizing alert management and notification routing in Prometheus-based monitoring environments.
    • Use for implementing alert silencing and inhibition to reduce noise and prevent redundant notifications.
    • Use for building highly available alerting clusters that ensure reliable delivery of critical operational alerts.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    Apache 2.0

    Permissive: commercial use, modification and redistribution are allowed with attribution; includes an explicit patent grant from contributors.

    Community files

    • README: present
    • Code of conduct: present

    Watch-outs

    No watch-outs from GStars' checks.

    General guidance from repository metadata, not legal advice. How we score

    From the README

    The Alertmanager handles alerts sent by client applications such as the Prometheus server. It takes care of deduplicating, grouping, and routing them to the correct receiver integrations such as email, PagerDuty, OpsGenie, or many other mechanisms thanks to the webhook receiver. It also takes care of silencing and inhibition of alerts.

    There are various ways of installing Alertmanager.

    Precompiled binaries for released versions are available in the download section on prometheus.io. Using the latest production release binary is the recommended way of installing Alertmanager.

    Excerpt from the prometheus/alertmanager README on GitHub (Apache-2.0 license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Sep 19: +2

    +60 stars over 46 days across 5 snapshot days; best day +2 on Sep 19.

    Forks

    2.5K+27

    Open issues

    427+10

    Compared with peers in Monitoring

    Fastest-growing repositories GStars tracks in this cohort for the week of Nov 1, by 7-day star growth

    prometheus/alertmanager compared with Monitoring repositories by stars, 7-day star growth, health score and last release
    RepositoryStars+7dHealthLast release
    ruvnet/RuView102.4K+1.4K556 days ago
    openobserve/openobserve22.8K+23540today
    cilium/cilium25.8K+52653 days ago
    grafana/loki29.1K+42651 day ago
    lowlighter/metrics17.3K—45—
    prometheus/alertmanager8.7K—604 days ago
    Category median25.8K+14455—

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