Open-source error tracking tools in 2026

6 open-source projects, ranked by GitHub stars and how recently each was worked on. Errbit leads with 4.3k stars, ahead of Exceptionless. 5 had code pushed in the last three months. Most common licenses: Apache-2.0 (3), MIT (2) and AGPL-3.0 (1). Commercial error tracking tools are listed separately.

All open-source error tracking tools, ranked

Complete systems you can adopt 4

1
Errbit errbit
The open source error catcher that's Airbrake API compliant :ukraine:

Complete system Usable You want free self-hosted error tracking for apps that already use Airbrake clients.
★ 4.3k MIT Ruby Active, pushed today
2
Exceptionless exceptionless
Exceptionless application

Complete system Production-ready Your apps are mainly .NET and you want error tracking with first-class .NET integration.
★ 2.5k Apache-2.0 C# Active, pushed today
3
Measure measure-sh
Measure helps mobile teams monitor and fix crashes, ANRs, bugs, and performance issues. The open source alternative to Firebase Crashlytics.

Complete system Usable A mobile team wants crash reporting and session timelines on infrastructure it controls.
★ 1.4k Apache-2.0 TypeScript Active, pushed today
4
Rustrak rustrak
Ultra-lightweight error tracking server compatible with Sentry SDKs

Complete system Experimental You want Sentry-compatible error tracking on a small server without self-hosting full Sentry.
★ 836 AGPL-3.0 Rust Active, pushed today

Building blocks for your own system 2

1
Tower mimiquate
🏰 Vendor-Neutral Exception/Error Tracking/Reporting/Monitoring in Elixir

Building block Usable Your Elixir app should report errors without tying code to one error-tracking vendor.
★ 200 Apache-2.0 Elixir Active, pushed 13 days ago
2
Lapse pyaesone17
Laravel Self Hosted Tiny Error Tracking System With Notifications

Building block Experimental Not for new projects.
★ 174 MIT PHP Quiet, pushed 8 years ago

Compared head to head

Bugsnag vs Sentry Rollbar vs Sentry Errbit vs Sentry Exceptionless vs Sentry Measure vs Sentry Bugsnag vs Rollbar Bugsnag vs Errbit Bugsnag vs Exceptionless Bugsnag vs Measure Errbit vs Rollbar Exceptionless vs Rollbar Measure vs Rollbar Errbit vs Exceptionless Errbit vs Measure Exceptionless vs Measure

Also under monitoring and observability tools

Uptime monitors Status page tools Incident management and on-call tools Log management tools Telemetry collectors and pipelines

Open-source licenses

Permissive: 5. Use it anywhere, including in closed products. You keep the copyright notice; Apache-2.0 also grants patent rights.
Network copyleft: 1. Like GPL, and running a changed version as a web service counts as distributing it, so its users get the source too.

Languages

Ruby 1, C# 1, TypeScript 1, Rust 1, Elixir 1 and PHP 1.

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