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ManageEngine OpManager vs PRTG Network Monitor: catalog facts
ManageEngine OpManager	PRTG Network Monitor
Freemium Free edition for a limited number of devices, with paid tiers for larger networks.	Freemium Free for up to one hundred sensors. Larger deployments require a paid licence.
Self-hosted	Windows, Web, Self-hosted
Covers fault, performance and configuration management in one console Free tier makes it accessible for monitoring smaller networks	One hundred sensors free forever, which covers a small network Autodiscovery, maps and alerting configured through one interface
Larger networks require paid tiers to unlock full device and feature limits Proprietary software, so you cannot inspect or modify the underlying code	Licensing is per sensor and gets expensive quickly Windows server only, closed source
Self-hosted, Downloadable app	Self-hosted
Closed source	Closed source
License not stated	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.