Checkly
Monitoring-as-code for APIs, browser flows, and uptime
What is Checkly?
Checkly is a developer-first synthetic monitoring platform built around the idea that monitoring should live alongside application code. Teams write API checks and end-to-end browser tests in TypeScript or JavaScript using Playwright, commit them to their repository, and deploy them as production monitors via the Checkly CLI, Terraform provider, or Pulumi provider. Checks run continuously from 20-plus global locations, with failed runs surfacing video recordings, Playwright trace files, network waterfall data, and console logs to speed up diagnosis. An AI-powered root cause analysis feature called Rocky can automatically explain failures when they occur.
Checkly excels at the intersection of testing and monitoring. Because it natively executes Playwright test suites in production, teams can reuse existing end-to-end tests as live monitors without rewriting them. The platform also covers API and uptime monitoring, provides customizable status pages, and sends alerts through Slack, PagerDuty, Opsgenie, email, and webhooks. Its monitoring-as-code philosophy means monitoring configuration is version-controlled, code-reviewed, and deployed alongside releases, which makes it a strong fit for modern CI/CD workflows where reliability checks need to keep pace with fast-moving deployments.
Best For
- Teams that write Playwright end-to-end tests and want to run them as production monitors without duplication
- Engineering teams that want monitoring configuration version-controlled and deployed through CI/CD pipelines
- API-heavy services that need frequent, multi-region HTTP checks with rich failure diagnostics
- Organizations already using Terraform or Pulumi for infrastructure and wanting to manage monitors the same way
- Developer teams needing uptime monitoring plus synthetic browser checks in a single unified platform
Limitations
- Monitoring only — Checkly detects and alerts on failures but does not execute or schedule your background jobs; you still need a separate scheduler or cron runtime
- Heartbeat monitoring is available (passive dead-man's-switch for external cron jobs), but there is no built-in job runner to trigger, queue, or retry HTTP tasks on a schedule
- Pricing is usage-based on check runs and locations, which can grow quickly for teams needing high-frequency checks across many regions
- Closed-source SaaS with no self-hosted option, meaning all monitoring traffic and check results flow through Checkly's cloud infrastructure
Checkly vs CronJobPro
Checkly and CronJobPro solve adjacent but distinct problems. Checkly is a monitoring and synthetic testing platform: it watches services you already run, executes Playwright-powered browser flows and API checks from global locations, and provides deep debugging artifacts when things break. CronJobPro, by contrast, is a job runner first — it executes scheduled HTTP requests on your behalf, handles retries, and then layers monitoring on top of that execution through heartbeat checks, uptime monitoring, multi-channel alerts, and public status pages. Teams that need to actually run scheduled tasks (fire an HTTP endpoint every hour, trigger a data pipeline, call a webhook on a cron expression) will find CronJobPro directly covers that use case, while Checkly assumes you have your own execution environment and focuses on verifying its behavior. Conversely, teams building complex web applications who want to reuse Playwright test suites as live production monitors, or who need per-step browser trace diagnostics and AI-assisted root cause analysis, will find Checkly's depth in that space hard to match. The tools are complementary more than they are competing: Checkly excels at synthetic quality assurance and API observability; CronJobPro excels at reliably running and monitoring the scheduled jobs themselves.
Official Website
https://www.checklyhq.comFrequently Asked Questions
What is Checkly?
Checkly is a developer-first synthetic monitoring platform built around the idea that monitoring should live alongside application code. Teams write API checks and end-to-end browser tests in TypeScript or JavaScript using Playwright, commit them to their repository, and deploy them as production monitors via the Checkly CLI, Terraform provider, or Pulumi provider. Checks run continuously from 20-plus global locations, with failed runs surfacing video recordings, Playwright trace files, network waterfall data, and console logs to speed up diagnosis. An AI-powered root cause analysis feature called Rocky can automatically explain failures when they occur.
What is Checkly best for?
Teams that write Playwright end-to-end tests and want to run them as production monitors without duplication. Engineering teams that want monitoring configuration version-controlled and deployed through CI/CD pipelines. API-heavy services that need frequent, multi-region HTTP checks with rich failure diagnostics. Organizations already using Terraform or Pulumi for infrastructure and wanting to manage monitors the same way. Developer teams needing uptime monitoring plus synthetic browser checks in a single unified platform.
How does Checkly compare to an external cron service?
Checkly and CronJobPro solve adjacent but distinct problems. Checkly is a monitoring and synthetic testing platform: it watches services you already run, executes Playwright-powered browser flows and API checks from global locations, and provides deep debugging artifacts when things break. CronJobPro, by contrast, is a job runner first — it executes scheduled HTTP requests on your behalf, handles retries, and then layers monitoring on top of that execution through heartbeat checks, uptime monitoring, multi-channel alerts, and public status pages. Teams that need to actually run scheduled tasks (fire an HTTP endpoint every hour, trigger a data pipeline, call a webhook on a cron expression) will find CronJobPro directly covers that use case, while Checkly assumes you have your own execution environment and focuses on verifying its behavior. Conversely, teams building complex web applications who want to reuse Playwright test suites as live production monitors, or who need per-step browser trace diagnostics and AI-assisted root cause analysis, will find Checkly's depth in that space hard to match. The tools are complementary more than they are competing: Checkly excels at synthetic quality assurance and API observability; CronJobPro excels at reliably running and monitoring the scheduled jobs themselves.
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