Paessler PRTG alternatives: 6 apps ranked by verified data
Common reasons people leave Paessler PRTG: the core server runs only on Windows, and sensor-based licences get expensive as networks grow. We ranked 6 alternatives by how directly each one replaces Paessler PRTG, then by reviews, real visits and how recently each app's facts were checked against its own website. Datadog currently ranks first.
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Show all 6 alternativesThe best Paessler PRTG alternative for…
The highest-ranked app in this list for each need.
Best Paessler PRTG alternative for most people
DatadogA SaaS observability platform for teams also monitoring cloud apps, logs and traces.
Best Paessler PRTG alternative for a free option
ZabbixFree and open source with no sensor limits, and the server runs on Linux.
Best Paessler PRTG alternative for a free plan you can upgrade
CheckmkSimilar auto-discovery and ready-made checks, with a free open-source edition.
Best Paessler PRTG alternative for open source
NagiosA long-standing open-source monitor with a huge plugin library for those happy to configure files.
Best Paessler PRTG alternative for self-hosting
IcingaA modern open-source take on Nagios with a better web interface and an API.
Best Paessler PRTG alternative for Linux
ZabbixFree and open source with no sensor limits, and the server runs on Linux.
Best Paessler PRTG alternative for iPhone and Android
Site24x7A cloud-hosted option covering networks, servers and websites with no server to maintain.
Best Paessler PRTG alternative for working in the browser
DatadogA SaaS observability platform for teams also monitoring cloud apps, logs and traces.
Paessler PRTG alternatives: common questions
What is the best alternative to Paessler PRTG?
Datadog ranks first right now. A SaaS observability platform for teams also monitoring cloud apps, logs and traces. Zabbix and Checkmk follow it in our ranking.
Is there a free alternative to Paessler PRTG?
Yes. Datadog (free plan + paid), Zabbix (open source), Checkmk (free plan + paid) and Nagios (open source) have a free option. Check each app's verified facts for current plan limits.
Is there an open-source alternative to Paessler PRTG?
Yes: Zabbix, Checkmk, Nagios and Icinga. Zabbix, Checkmk and Nagios can also be self-hosted.
Which Paessler PRTG alternatives work on Linux?
Zabbix, Checkmk, Nagios and Icinga run on Linux.
Why do people switch from Paessler PRTG?
The complaints we hear most: the core server runs only on Windows; sensor-based licences get expensive as networks grow; different licence sizes can't be combined on one server.
How is this list ranked?
Every app is scored with the same published formula: how directly it replaces Paessler PRTG, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.