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Monitoring

Free and open-source Sentry.io alternatives

Sentry.io (Error tracking and performance monitoring for developers) is a commercial product. These 2 tools do the same job and are free to use or to self-host.
Short answer: the best free alternatives to Sentry.io are GlitchTip and SigNoz. Sentry.io starts at $26/mo (Team). Self-hosting is free; you pay only for the server (a small VPS is about $4–6/mo). Licenses and prices checked 2026-10-01.
  1. 1
    GlitchTip

    Open-source error tracking compatible with Sentry SDKs

    Error tracking that accepts Sentry SDKs.

    Open source (MIT) ·details

  2. 2
    SigNoz

    Open-source observability: traces, metrics and logs on OpenTelemetry

    Exceptions alongside traces and logs.

    Open source (MIT (core)) ·★ 32k GitHub stars · last commit 2026-10-07 · details

Want paid options too? See all Sentry.io alternatives or the full free alternatives list. Beyond developer tools, OSS Software lists more open-source Sentry.io alternatives.

FAQ

Is there a free alternative to Sentry.io?+

Yes. GlitchTip and SigNoz do the same job for free; GlitchTip and SigNoz are open source.

What is the best open-source alternative to Sentry.io?+

SigNoz is the most starred on GitHub (32k stars). Exceptions alongside traces and logs.

Open source: OSI-approved license. Free to self-host: the code is public and free to run yourself, with limits in the license.