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   * [CatchJS.com](https://catchjs.com/) - JavaScript error tracking with screenshots and click trails. Free for open source projects.
   * [bugsnag.com](https://www.bugsnag.com/) — Free for up to 2,000 errors/month after the initial trial
+  * [elmah.io](https://elmah.io/) — Error logging and uptime monitoring for web developers. Free Small Business subscription for open source projects.
   * [exceptionless](https://exceptionless.com) — Real-time error, feature, log reporting and more. Free for 3k events per month/1 user. Open source and easy to self-host for unlimited use.
   * [GlitchTip](https://glitchtip.com/) — Simple, open source error tracking. Compatible with open-source Sentry SDKs. 1000 events per month for free, or can self-host with no limits
   * [honeybadger.io](https://www.honeybadger.io) - Exception, uptime, and cron monitoring. Free for small teams and open-source projects (12,000 errors/month).