Sentry is an open-source application monitoring platform focused on error tracking, performance monitoring, and release health across web, mobile, and backend services, helping teams catch and diagnose issues before users are affected.
The site documents SDKs for JavaScript, Python, Java, Go, and many other languages, along with features like breadcrumbs, source maps, tracing, and alerting that integrate into existing CI and on-call workflows.
It suits frontend and backend engineers who need to see stack traces, replays, and latency breakdowns in one place, and it helps engineering managers track error rates and stability scores across releases.
Compared with basic logging it adds context-rich issue grouping and user impact metrics, and compared with full APM suites it stays lightweight and developer-centric while still covering tracing and profiling.
Configure sampling and alert thresholds to avoid noise and cost, protect sensitive data with scrubbing rules, and connect releases so regressions can be tied to specific deploys rather than guessed.