analytics
Sentry
Application monitoring and error tracking with stack traces, distributed tracing, and session replay.
Sentry tracks unhandled application errors, uncaught exceptions, and performance regressions across frontend, backend, and mobile stacks. Each recorded issue includes complete stack traces with line numbers, code snippets, local variable values, and user action breadcrumbs leading up to the failure. Its distributed tracing correlates slow database queries and downstream HTTP calls with the root exception, while Session Replay reproduces client-side UI bugs alongside the stack trace. The Developer plan runs free forever for solo engineers.
Free tier quotas
| Monthly Errors | 5,000 errors/month |
| Performance Spans | 5,000,000 spans/month |
| Logs & Metrics | 5 GB logs and 5 GB application metrics/month |
| Session Replay | 50 replays/month (5,000/mo promotional for 3 months) |
| Monitors | 1 cron monitor and 1 uptime monitor |
| Retention & Seats | 30-day data retention, 1 member seat, unlimited projects |
| Dashboards & Protocols | 10 custom dashboards with full MCP server access |
Last sniffed Oct 20, 2026. Always confirm on the official pricing page.
👍 Good boy
- +Captures line-by-line stack traces with local variables, user breadcrumbs, and suspect commit attribution.
- +Connects errors to distributed trace waterfalls and session replays without manual timestamp matching.
- +Provides official SDKs with single-line terminal setup across Next.js, Node, Python, Go, and React Native.
- +Free Developer plan never requires a credit card and includes 5,000 errors, 5M spans, and MCP agent integration.
👎 Watch out
- −High error spikes on production workloads exhaust the 5,000 monthly event limit rapidly, stopping tracking until the next cycle.
- −Navigation feels crowded across traces, metrics, profiles, and replays when developers only want to inspect a single stack trace.
- −Build configurations for uploading source maps to Next.js or Expo fail when tokens or file paths shift between versions.
- −Automated issue assignment and team alerting rules require upgrading to the $26/month Team plan.
The catch
Event collection stops immediately once you consume your 5,000 monthly errors or 5M spans unless you attach a card for pay-as-you-go overage.
Free tier value
- Generosity
- A
- Estimated value
- $26/mo
- Feature parity
- Full core error monitoring, tracing spans, and logs included with single-seat limit
Screenshots
