Compare software

PRTG Network MonitorManageEngine OpManager
Freemium

Free for up to one hundred sensors. Larger deployments require a paid licence.

 Freemium

Free edition for a limited number of devices, with paid tiers for larger networks.

Windows, Web, Self-hosted Self-hosted
  • One hundred sensors free forever, which covers a small network
  • Autodiscovery, maps and alerting configured through one interface
  • Covers fault, performance and configuration management in one console
  • Free tier makes it accessible for monitoring smaller networks
  • Licensing is per sensor and gets expensive quickly
  • Windows server only, closed source
  • 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
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

Checked September 22, 2026

Checked September 22, 2026

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