1
Sentry Free tier Open Source

Application monitoring platform focused on error tracking, performance monitoring, and session replay.

Free for 5K errors and 10K performance events/mo · Paid from $26/mo Development teams that need to catch, triage, and fix errors quickly
Error Tracking Session Replay Performance Monitoring Release Tracking
2
Grafana Free Open Source

Open-source observability platform for metrics visualization, dashboards, and alerting from any data source.

Free Teams wanting open-source dashboards and visualization
Dashboards Alerting Data Sources Open Source
3
Highlight.io Free tier Open Source

Open-source full-stack monitoring with session replay, errors, and logs.

Free for 500 sessions/month · Paid from $50/mo Teams wanting session replay, error tracking, and logging in one open-source tool
Session replay Error monitoring Logging Open source

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