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   * [checklyhq.com](https://checklyhq.com) - Open source E2E / Synthetic monitoring and deep API monitoring for developers. Free plan with 5 users and 50k+ check runs.
   * [circonus.com](https://www.circonus.com/) — Free for 20 metrics
   * [cloudsploit.com](https://cloudsploit.com) — AWS security and configuration monitoring. Free: unlimited on-demand scans, unlimited users, unlimited stored accounts. Subscription: automated scanning, API access, etc.
+  * [cronitor.io](https://cronitor.io/) - Performance insights and uptime monitoring for cron jobs, websites, APIs and more. Free tier with 5 monitors.
   * [datadoghq.com](https://www.datadoghq.com/) — Free for up to 5 nodes
   * [deadmanssnitch.com](https://deadmanssnitch.com/) — Monitoring for cron jobs. 1 free snitch (monitor), more if you refer others to sign up
   * [economize.cloud](https://economize.cloud) — Economize helps demystify cloud infrastructure costs by organizing cloud resources, optimize and report the same. Free for up to $5000 spends on Google Cloud Platform every month.