Sentry is the industry-leading application monitoring platform, helping over 4 million developers at companies like Cloudflare, Discord, GitHub, and Microsoft identify and fix bugs before they impact users. Founded in 2012, Sentry revolutionized error tracking with its developer-first approach.

Sentry goes well beyond simple error logging — it captures the full context of every error: the stack trace, user information, breadcrumbs leading up to the error, the Git commit that introduced the bug, and the exact line of code responsible.

Key Features

• Real-time error tracking with full stack traces and contextual data
• Performance monitoring — slow transactions, N+1 queries, and bottlenecks
• Session Replay — watch exactly what the user did before an error
• Release tracking — see which deployment introduced a regression
• Suspect commits — AI-powered root cause analysis linking errors to code changes
• SDKs for 100+ platforms including JavaScript, Python, Ruby, Go, iOS, and Android
• Cron monitoring, uptime, and alerts

Sentry is open source and self-hostable, with a Free Developer plan and paid Team/Business plans for growing teams. Sentry is available as a fully-managed cloud service at sentry.io.