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Networking · head to head

Icinga vs ThousandEyes

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
ThousandEyes logo

ThousandEyes

Networking

Internet and network path monitoring, owned by Cisco but still sold as a standalone product on its own annual contracts

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Icinga has a free tier, so it costs nothing to try first.
  • 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; ThousandEyes cisco does not publish a current definitive rate card, so any price a buyer finds online is likely outdated and should be confirmed directly with sales before budgeting
  • They diverge on capability: Icinga covers Forever Free core, ThousandEyes covers Path visualisation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Icinga and ThousandEyes actually diverge.

Attributes where Icinga and ThousandEyes differ
AttributeIcingaThousandEyes
Starting priceFreeOn request
Pricing modelOpen source core, with paid repository, module and support subscriptions sold separatelyquote, unit-based consumption on annual or prepaid contracts
Free tierYesNo
PlatformsLinux, WebWeb, API

Identical on both: 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 ThousandEyes

  • Path visualisation
  • Cloud, enterprise and endpoint agents
  • Internet Insights
  • Cisco ecosystem integration
  • Unit-based consumption billing

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 ThousandEyes
  • An organisation on RHEL or SLES that wants officially packaged Icinga builds via the repository subscription rather than building from sourcenot ThousandEyes
  • A team wanting an SLA-backed vendor support relationship rather than relying on community forums for a production monitoring systemnot ThousandEyes
  • A company already invested in Prometheus and Grafana wanting to add host and service-level alerting from a compatible open source toolnot ThousandEyes

ThousandEyes

  • A network operations team at a large enterprise needing to diagnose whether a performance problem sits inside their network, with an ISP, or at the destinationnot Icinga
  • An organisation already standardised on Cisco networking wanting internet path monitoring that integrates with existing Cisco toolingnot Icinga
  • A company needing endpoint agent testing from real employee devices to reproduce user-reported performance issuesnot Icinga
  • An SRE team wanting aggregated internet outage and BGP visibility across a wide customer base rather than building that dataset themselvesnot 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

ThousandEyes

  • Cisco does not publish a current definitive rate card, so any price a buyer finds online is likely outdated and should be confirmed directly with sales before budgeting
  • A 12-month minimum contract removes the option to trial the platform under real production load on a shorter commitment
  • Unit-based consumption billing across different test types is not always intuitive to forecast, and usage can grow unpredictably as more tests and agents are added
  • Since the Cisco acquisition, purchasing now runs through Cisco's broader enterprise sales and licensing process, which can be slower and less transparent than dealing with a smaller standalone vendor
  • Deep Cisco ecosystem integration is a real advantage only for organisations already standardised on Cisco; it offers less differentiated value for a non-Cisco shop
  • Endpoint agent pricing tiers (Essentials versus Advantage) gate meaningfully different capability, and choosing the wrong tier at signup can mean a contract renegotiation to get needed features

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

ThousandEyes

On request
  • ThousandEyes$undefined/year
    • Cloud and enterprise agent testing
    • Endpoint agents
    • Internet Insights

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 ThousandEyes if

  • You need path visualisation.
  • You work on Web, API.
  • You also want cloud, enterprise and endpoint agents.
ThousandEyes review

Questions people ask

Is Icinga or ThousandEyes better?
Neither clearly leads. Icinga starts at Free and ThousandEyes at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Icinga or ThousandEyes?
Icinga has a free tier; the other does not. Paid plans start at Free for Icinga and On request for ThousandEyes.
Does Icinga or ThousandEyes run on more platforms?
Icinga runs on Linux, Web. ThousandEyes runs on Web, API.
Can I use Icinga for free?
Yes. Icinga has a free tier, so you can try it without paying. ThousandEyes starts at On request.
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 ThousandEyes is typically brought in for.
What can Icinga do that ThousandEyes cannot?
Icinga covers Forever Free core, Clustering and HA, Icinga Web and API, Enterprise modules (paid). ThousandEyes covers Path visualisation, Cloud, enterprise and endpoint agents, Internet Insights, Cisco ecosystem integration.

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.

ThousandEyes: Is ThousandEyes still sold as a standalone product after the Cisco acquisition?

Yes, it remains a distinct, purchasable product line rather than being merged into another Cisco offering.

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.

ThousandEyes: Is there a published, current price list?

No, Cisco does not publish a definitive current rate card; historical unit prices exist online but should not be treated as confirmed 2026 pricing.

Icinga: Is Icinga related to Nagios?

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

ThousandEyes: What is the minimum contract length?

12 months.

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