Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
From $26 per month (Team plan, indicative)
Free tierFrom $7 per month (indicative, Solo)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Event-volume pricing. A noisy application can consume the quota quickly, so filtering matters.
One of the best free tiers in infrastructure tooling; paid plans are still inexpensive.
Free tier
Free developer plan with a monthly error and replay allowance.
50 monitors at 5-minute intervals, free forever.
Open source
BSL / FSL
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Category standard
Functional Software (Sentry) · since 2012
Widely used
UptimeRobot · since 2010
Strengths
Limitations
Best for
Essentially every engineering team — error tracking is the highest-value monitoring you can add first.
Side projects, small businesses and anyone who currently has no monitoring at all.
All of these integrate with: Slack, PagerDuty.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.