Sentry
Production error tracking. Stack traces, breadcrumbs, performance monitoring.
Strengths
- Complete stack traces with source maps, error pointed to your source code
- Breadcrumbs: complete trace of user actions before the crash
- GitHub integration: link an error to a commit/PR in one click
- Session Replay: see exactly what the user did before the error
Limitations
- Free tier limited to 5k errors/month and 1 project, paid for any serious app
- High noise without beforeSend filter configuration: too many useless alerts
- Heavy SDK (~70KB), needs careful lazy-loading or tree-shaking in prod
Best for
- Production apps with real users, real-time crash alerts
- React SPAs with error boundaries instrumented at every level