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)
PaidFree tier available
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.
The free tier is genuinely usable. Costs come from full-platform user seats rather than check volume.
Free tier
30-day trial.
100 GB of data ingest and one full-platform user free every month, permanently.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
SolarWinds · since 2007
Widely used
New Relic · since 2015
Strengths
Limitations
Best for
Organisations wanting an established name for straightforward uptime monitoring.
Teams wanting an observability platform with monitoring included and a real free tier.
All of these integrate with: Slack, PagerDuty.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.