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Zabbix vs Sensu: catalog facts
Zabbix	Sensu
Free Free and open source under the AGPL. Support and services are paid.	Freemium Free download, with paid plans listed on the pricing page.
Linux, Web, Self-hosted	Windows, Linux, Self-hosted, Command line
Scales to tens of thousands of monitored devices with proxies Large template library covering common hardware and services	Monitoring defined as code and applied with sensuctl Routes check results to alerting and automation handlers
Configuration is extensive; the learning curve is real Interface density makes simple setups feel heavy	Aimed at operations teams rather than single desktops Some features are part of paid plans
Self-hosted	Downloadable app, Self-hosted
Open source	Closed source
License: AGPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.