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 $10 per month (indicative, Synthetic starter)
PaidFrom $40 per month (indicative, Team plan by check runs)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Transaction checks and RUM are priced separately from basic uptime checks and add up.
Priced by check runs; browser checks cost more than API checks, and frequency multiplies the bill.
Free tier
30-day trial.
Free plan with a monthly check-run allowance covering a small site.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
SolarWinds · since 2007
Widely used
Checkly · since 2018
Strengths
Limitations
Best for
Organisations wanting an established name for straightforward uptime monitoring.
Engineering teams already using Playwright who want production journeys monitored.
All of these integrate with: Slack, PagerDuty, Opsgenie.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.