Collect application errors using Sentry-compatible SDKs.
Hosted free: 15,000 events/month · 5,000 retained · one user.

Developer tools
Collect application errors and investigate them with Sentry-compatible SDKs.
Collect application errors and investigate them with Sentry-compatible SDKs.
Open-source Sentry-compatible error reporting and uptime monitoring platform avoiding AppSignal recurring monthly monitoring plans. Free open-source application monitoring and error tracking alternative to Papertrail. Delivers crash reporting, event aggregation, and error alert routing using standard Sentry-compatible SDKs. Focuses on application exceptions and structured traces rather than raw Linux server syslog streaming. Free open-source Sentry-compatible application error tracking platform alternative to Sentry Business. Ingests crash reports and performance transactions directly through official Sentry client SDKs with zero monthly event overage fees.
This free route uses the self-hosted edition. Operate and back up your own server. Hosted events are shared across errors, uptime, performance and release storage, so 1,000/month may suit only low-volume projects. This recommendation covers error tracking, not all Sentry or Datadog features.
Each comparison covers the workflow described above, rather than every paid feature.