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Nagios Core vs Pandora FMS: catalog facts
Nagios Core	Pandora FMS
Free Free and open source. Hosting, hardware and any external services are separate.	Freemium An open-source edition is available; commercial on-premise and SaaS licences are sold…
Self-hosted	Web, Self-hosted
Runs plugin-based checks Tracks availability and sends notifications	Covers servers, networks, applications, logs and user experience Dashboards, reports and alerts built in
Configuration and many checks need manual setup or additional plugins.	Aimed at organisations, so setup is more involved than a desktop monitor Many features and add-ons belong to the commercial editions
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: GPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is 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 September 24, 2026

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