Healthchecks.io is an online service for monitoring regularly running tasks such as cron jobs. It uses the Dead man's switch technique: the monitored system must "check in" with Healthchecks.io at regular, configurable time intervals. When Healthchecks.io detects a missed check-in, it sends out alerts.
Healthchecks.io is a product of SIA Monkey See Monkey Do, currently a one-man software and consulting company. The one man is Pēteris Caune, a long time Python developer from Valmiera, Latvia. Twitter, Github.
Healthchecks.io is an open-source project. The code is on GitHub. It has BSD license and is accepting contributions.
Here are a few metrics about the service (updated manually, last updated: September 10, 2021).
|6||years in business|
|16 300||free accounts|
|33||open source & non-profit accounts|
|6 500||USD monthly recurring revenue|
|82 600||checks (services monitored)|
|24 100 000||pings processed per day|
|25 900||notifications sent per day|
The service currently runs on Hetzner bare metal servers, with healthy excess capacity to handle traffic spikes. The app servers are load-balanced. The PostgreSQL database has a hot standby as well as full daily backups to S3. The database fail-over process is manual, and the ops team consists of a single person, so multi-hour or even multi-day outages are possible!
While we can only guarantee the best effort availability, in practice, the availability has exceeded 99.9% since the service publicly launched in July 2015.
Mailing address:SIA Monkey See Monkey Do