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Checkmk vs ManageEngine OpManager: catalog facts
Checkmk	ManageEngine OpManager
Freemium Free open-source Raw edition, with paid Enterprise and Cloud editions.	Freemium Free edition for a limited number of devices, with paid tiers for larger networks.
Self-hosted	Self-hosted
Auto-discovery reduces manual setup for new hosts and services Supports both agent-based and agentless SNMP monitoring	Covers fault, performance and configuration management in one console Free tier makes it accessible for monitoring smaller networks
Advanced features and scaling are gated behind paid commercial editions Self-hosted setup and tuning takes more effort than a hosted SaaS monitor	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, Downloadable app	Self-hosted, Downloadable app
Open 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.