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 $7 per month (indicative, Solo)
Free tierFrom $24 per month (indicative, Superior)
Free tierWhat drives the bill
The metric that actually scales your invoice.
One of the best free tiers in infrastructure tooling; paid plans are still inexpensive.
SSL and domain expiry monitoring included on paid plans, which prevents a genuinely common outage cause.
Free tier
50 monitors at 5-minute intervals, free forever.
Free plan with unlimited uptime tests at 5-minute intervals.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
UptimeRobot · since 2010
Established
StatusCake · since 2012
Strengths
Limitations
Best for
Side projects, small businesses and anyone who currently has no monitoring at all.
Small teams wanting broad availability coverage cheaply.
All of these integrate with: Slack, PagerDuty, Webhooks, Zapier.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.