Sentry

Sentry is a web, mobile, and API application monitoring platform for developers and software teams that need to diagnose errors and performance issues across full-stack and multi-service apps.

• Error Monitoring captures exceptions and crashes with full stack traces, breadcrumbs, and runtime context to speed up root-cause analysis.
• Performance Monitoring and distributed tracing track throughput, latency, Web Vitals and mobile vitals (including TTID and TTFD) to pinpoint slow database queries, API calls, UI lag, and page loads.
• Session Replay records real user sessions to correlate UI behavior with errors and failed requests.
• Additional monitoring includes Profiling for slow functions, Crons for scheduled jobs, Logs analysis in context, and Uptime Monitoring for URL checks with alerts and tracing.

Pricing: Freemium. Developer (free, 1 user, 5k errors/month); Team ($26/month billed annually, unlimited users); Business ($80/month billed annually, advanced quota management and SAML/SCIM); Enterprise (custom). Usage above each plan's quota is billed pay-as-you-go, and paid plans can be started as a trial.

Notable for unifying errors, traces, logs, replays, profiles, and metrics under shared context so teams can prioritize fixes by user impact and debug across releases and services. It also offers Seer, an AI debugging agent with Autofix and AI code review (at additional cost), plus an MCP server for AI coding tools.