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Networking · head to head

Icinga vs ZeroTier

Icinga logo

Icinga

Networking

Open source infrastructure monitoring, free at its core, with paid support and modules sold separately by Icinga GmbH

From
Free
Rated
-
Full reviewWebsite
ZeroTier logo

ZeroTier

Networking

Software-defined mesh networking, free up to 10 devices and one network, then billed per device

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Icinga the free core has no vendor SLA, so production incidents are supported through community channels unless a paid support subscription is purchased; ZeroTier the free tier caps at 10 devices and 1 network, which a small business will outgrow quickly and then face both a base plan fee and per-device overage charges
  • They diverge on capability: Icinga covers Forever Free core, ZeroTier covers Peer-to-peer mesh networking.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Icinga and ZeroTier actually diverge.

Attributes where Icinga and ZeroTier differ
AttributeIcingaZeroTier
Pricing modelOpen source core, with paid repository, module and support subscriptions sold separatelyFree up to 10 devices and 1 network, then per additional device per month
PlatformsLinux, WebWindows, macOS, Linux, iOS, Android

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Networking).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Icinga

  • Forever Free core
  • Clustering and HA
  • Icinga Web and API
  • Enterprise modules (paid)
  • Integration ecosystem

Only in ZeroTier

  • Peer-to-peer mesh networking
  • Free personal tier
  • Per-device overage pricing
  • Multiple networks
  • Cross-platform clients

What people use each for

The jobs each tool is most often brought in to do.

Icinga

  • An IT team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard Linux distributionsnot ZeroTier
  • An organisation on RHEL or SLES that wants officially packaged Icinga builds via the repository subscription rather than building from sourcenot ZeroTier
  • A team wanting an SLA-backed vendor support relationship rather than relying on community forums for a production monitoring systemnot ZeroTier
  • A company already invested in Prometheus and Grafana wanting to add host and service-level alerting from a compatible open source toolnot ZeroTier

ZeroTier

  • A hobbyist or small home lab wanting free virtual LAN connectivity across devices without a business tiernot Icinga
  • A small business connecting a handful of remote offices or remote workers into one virtual network on the Essential plannot Icinga
  • A growing company scaling past the free device limit that needs multiple networks and predictable per-device overage pricingnot Icinga
  • A service provider or large IoT deployer needing custom Enterprise or Quantum packaging for very large device countsnot Icinga

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Icinga

  • The free core has no vendor SLA, so production incidents are supported through community channels unless a paid support subscription is purchased
  • Repository access for enterprise Linux distributions like RHEL and SLES is not free, so organisations standardised on those distributions face a real recurring cost most open source monitoring buyers do not expect
  • Enterprise modules are gated behind a separate module subscription, so some functionality demonstrated in marketing material is not part of the free core
  • Self-hosting and operating Icinga requires real Linux and monitoring expertise that a commercial SaaS tool would otherwise absorb, so total cost of ownership includes staff time not captured in the licence price
  • Pricing for the paid subscriptions varies by geographic region and is not published as a single global rate card, complicating budgeting for multinational organisations
  • The web interface and configuration language, while capable, are less immediately polished than a fully commercial tool like PRTG, and initial setup takes longer to reach a usable state

ZeroTier

  • The free tier caps at 10 devices and 1 network, which a small business will outgrow quickly and then face both a base plan fee and per-device overage charges
  • Per-additional-device pricing on Essential ($2.00 each) is proportionally expensive for a team that grows just past the included count, since the jump from free to paid is immediate once the 11th device joins
  • Relay fallback, when a direct peer-to-peer path cannot be established (common behind certain NAT or firewall configurations), routes traffic through ZeroTier's infrastructure, adding latency and a dependency the buyer does not fully control
  • Enterprise and Quantum tiers are entirely custom-quoted, so very large deployments cannot be budgeted from the public pricing page
  • Network administration for larger deployments (Scale and above) still requires understanding ZeroTier's access control and network rule model, which has a real learning curve beyond simple device joining
  • As with any software-defined mesh network, security depends on correctly configured network authorization; a misconfigured network can expose devices more broadly than intended

Pricing, plan by plan

Icinga

Free
  • IcingaFree
    • Unlimited hosts and services
    • Clustering and API
    • Community support
  • Support Subscription$undefined/year
    • Professional support (8x5 or 24/7)
    • Includes module and repository subscriptions

ZeroTier

Free
  • PersonalFree
    • 10 devices included
    • 1 network
  • Essential$18/month
    • 10 devices included
    • 10 networks
    • $2.00 per additional device/month
  • Scale$179/month
    • 100 devices included
    • Unlimited networks
    • $1.80 per additional device/month

Which should you pick?

Choose Icinga if

  • You need forever free core.
  • You want to start without paying.
  • You work on Linux, Web.
  • You also want clustering and ha.
Icinga review

Choose ZeroTier if

  • You need peer-to-peer mesh networking.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android.
  • You also want free personal tier.
ZeroTier review

Questions people ask

Is Icinga or ZeroTier better?
Neither clearly leads. Icinga starts at Free and ZeroTier at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Icinga or ZeroTier?
Icinga starts at Free and ZeroTier at Free.
Does Icinga or ZeroTier run on more platforms?
Icinga runs on Linux, Web. ZeroTier runs on Windows, macOS, Linux, iOS, Android.
Can I use Icinga for free?
Both have a free tier, so you can try either at no cost before committing.
What is Icinga best used for?
Icinga is most often used for an it team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard linux distributions, an organisation on rhel or sles that wants officially packaged icinga builds via the repository subscription rather than building from source, a team wanting an sla-backed vendor support relationship rather than relying on community forums for a production monitoring system, a company already invested in prometheus and grafana wanting to add host and service-level alerting from a compatible open source tool. Of those, an it team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard linux distributions and an organisation on rhel or sles that wants officially packaged icinga builds via the repository subscription rather than building from source are not what ZeroTier is typically brought in for.
What can Icinga do that ZeroTier cannot?
Icinga covers Forever Free core, Clustering and HA, Icinga Web and API, Enterprise modules (paid). ZeroTier covers Peer-to-peer mesh networking, Free personal tier, Per-device overage pricing, Multiple networks.

Answered from the vendors’ own pages

Icinga: Is Icinga free to run in production?

Yes, the core platform has no licence fee and no limit on hosts or services monitored.

ZeroTier: Is ZeroTier free for personal use?

Yes, the Personal plan is free for up to 10 devices and 1 network.

Icinga: What do the paid subscriptions actually add?

A repository subscription provides packages for certain enterprise Linux distributions, a module subscription unlocks enterprise-only add-on modules, and a support subscription bundles both with professional support.

ZeroTier: How does overage pricing work?

Beyond a plan's included device count, additional devices are billed individually per month, at $2.00 each on Essential and $1.80 each on Scale.

Icinga: Is Icinga related to Nagios?

Yes, it originated as a fork of Nagios but has since diverged into an independently developed platform.

ZeroTier: Is there a nonprofit or education discount?

Yes, registered charities and educational organisations receive up to 50% off.

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