Compare error tracking tools by free tier, event pricing, release health, mobile fit, replay, observability breadth, and uptime blind spots.
Compare exception tracking with outside-in uptime checks, see which failures each misses, and combine both without duplicating noisy alerts.
Learn what 4xx client errors mean, how 400, 401, 403, 404 and 429 differ, and which rates, routes and regressions should trigger alerts.
Monitor 5xx error rates with ratio-based alerts, route and dependency breakdowns, burn-rate context, and an on-call playbook for 500–504 failures.
3 monitors, 10-minute checks, instant email and Slack alerts — no credit card required.
Start Free Monitoring