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LibreNMS vs ManageEngine OpManager: catalog facts
LibreNMS	ManageEngine OpManager
Free Free and open source. Hosting, hardware and any external services are separate.	Freemium Free edition for a limited number of devices, with paid tiers for larger networks.
Self-hosted	Self-hosted
Collects device information and performance data Provides alerting and historical graphs	Covers fault, performance and configuration management in one console Free tier makes it accessible for monitoring smaller networks
Device visibility depends on supported protocols and credentials.	Larger networks require paid tiers to unlock full device and feature limits Proprietary software, so you cannot inspect or modify the underlying code
Self-hosted	Self-hosted, Downloadable app
Open source	Closed source
License: GPL-3.0	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 22, 2026

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