Open Source Monitoring, Logs & Errors alternatives in 2026
Track errors, metrics and production logs without paying per seat.
Quick comparison
Sorted by featured first, then GitHub stars as a tiebreaker — the same rule we use across the whole site.
| Tool | License | Minimum RAM | GPU | Docker | GitHub |
|---|---|---|---|---|---|
| Pi-hole Lightest option100% FOSSMost popular on GitHub | EUPL-1.2 | ~256MB | — | ✅ | ★ ~50,000 |
| SigNoz | MIT | ~4GB | — | — | ★ ~32,000 |
| Beszel Lightest option100% FOSS | MIT | ~256MB | — | ✅ | ★ ~25,000 |
| AdGuard Home Lightest option100% FOSS | GPL-3.0 | ~256MB | — | ✅ | ★ ~24,000 |
| Sentry (self-hosted) | FSL-1.1 (pasa a Apache-2.0 a los 2 años) | ~4GB | — | ✅ | ★ ~9,500 |
| GlitchTip 100% FOSS | MIT | ~2GB | — | ✅ | ★ ~2,500 |
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Build my stackDetailed profile of each alternative
Alternative to Bugsnag, Datadog
Production error tracking, the official self-hosted version.
Alternative to Sentry
Compatible with the Sentry SDK but much lighter to self-host.
Alternative to Datadog, New Relic
Unified metrics + traces + logs, an alternative to Datadog/New Relic.
Alternative to Datadog, New Relic
Ultra-lightweight server monitor, a single binary, a minimal alternative to Datadog.
Alternative to NextDNS
Network-wide DNS ad-blocking, an alternative to NextDNS.
Alternative to NextDNS
Network-wide DNS ad-blocking with native DoH/DoT, an alternative to NextDNS.
Alternative to Datadog
Real-time infrastructure monitoring, a self-hosted alternative to Datadog.
Alternative to Visualping
Website change monitoring, an alternative to Visualping.
Alternative to Speedtest.net
Automatic history of your internet connection speed.
Alternative to Datadog
OpenTelemetry observability (traces, metrics, logs), an alternative to Datadog.
Frequently asked questions
Which Monitoring, Logs & Errors tools are 100% free?
4 out of 6 are 100% FOSS. The rest are Open-Core: the core is free, but some advanced feature may stay paid — we call it out on each tool's page.
Do I need a GPU to use these tools?
No, none of the 6 tools in this category need a GPU — they all run fine on CPU alone.
How much RAM do I need at minimum?
The lightest option on this list is Pi-hole, which runs on as little as 256MB of RAM — enough for a cheap VPS.