← All website monitoring tools
Checkly
Synthetic monitoring with Playwright browser tests — developer-first, code-as-config.
Free tier: 10K API checks/mo, 1500 browser checks/mo
What it does well
- Natively runs Playwright and Puppeteer scripts for complex browser-based user journey tests.
- Provides a CLI and Terraform provider for managing checks as version-controlled code.
- Free tier includes 10,000 API checks and 1,500 browser checks per month.
Where it falls short
- Exclusively a synthetic monitoring tool; lacks integrated RUM, logging, or APM features.
- The code-first approach may present a steeper learning curve for non-developer users.
- Does not offer a self-hosted deployment option; it is a cloud-only service.
Alternatives to Checkly
Datadog Synthetics
paidEnterprise synthetic monitoring — part of Datadog's observability platform, billed per check.
Sematext Synthetics
paidSynthetic monitor with Selenium-based browser checks + transaction monitoring.
Grafana Cloud Synthetic
freemiumGrafana Cloud's synthetic monitor — free tier integrated with full observability suite.
UptimeRobot
freemiumMost popular free uptime monitor — 50 free monitors at 5-min intervals.