Prtg Network Monitor 21.0.x [extra Quality]

Input your company's SMTP relay server details so PRTG can send notifications immediately.

Beyond simple emails, 21.0.x supports push notifications to the PRTG mobile app, Slack integration, and even HTTP actions to trigger self-healing scripts.

For greenfield deployments in 2025: – choose the latest PRTG version or a cloud-native alternative. prtg network monitor 21.0.x

In , Paessler announced the alpha release of a brand‑new user interface and a completely new RESTful API (API v2) . These features were not fully available in the 21.0.x series but began appearing in 21.1.x and later versions as experimental options.

Last updated: May 2026 – Information applies to PRTG Network Monitor 21.0.x series (builds 21.0.60.xxxx through 21.0.69.162). Input your company's SMTP relay server details so

The Core Server is the central nervous system of a PRTG installation. It handles the user interface (web, desktop, and mobile), API endpoints, reporting engine, and notification system.

The 2021 releases added , spanning cloud, storage, industrial, and data‑center monitoring. Key examples include: In , Paessler announced the alpha release of

These sensors allowed PRTG to monitor hyper‑converged infrastructure (HPE 3PAR), cloud services (Azure, AWS), industrial equipment (OPC UA, Beckhoff), and the physical health of data‑center hardware. [25†L12-L22]

PRTG can scan your network segments and automatically create sensors for discovered devices. This saves hours of manual configuration.

Version numbering at Paessler follows a pattern: major release (21), minor release (0), and patch (x – e.g., 21.0.69.162). The was released in early 2021. Key themes for this version included: