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Networking · head to head

Headscale vs Kentik

Headscale logo

Headscale

Networking

Open source reimplementation of the Tailscale coordination server for a single organisation

From
Free
Rated
-
Full reviewWebsite
Kentik logo

Kentik

Networking

Network observability platform built on flow and traffic data, sold on annual-only contracts starting around $24,000/year

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Headscale has a free tier, so it costs nothing to try first.
  • Each has a real cost: Headscale the clients are proprietary software maintained by a company with no obligation to Headscale, so a client update can change protocol behaviour and break your control server until volunteers catch up.; Kentik contracts are annual only, so there is no monthly option for a team wanting to trial the platform under real production load before committing to a year of spend
  • They diverge on capability: Headscale covers Self hosted control server, Kentik covers Flow-based traffic analysis.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Headscale and Kentik actually diverge.

Attributes where Headscale and Kentik differ
AttributeHeadscaleKentik
Starting priceFreeOn request
Pricing modelOpen source, no licence feeAnnual contract only, per tier
Free tierYesNo
PlatformsLinux, DockerWeb, 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 Headscale

  • Self hosted control server
  • Access control policies
  • User separation
  • Pre-authentication keys
  • Subnet routers and exit nodes
  • Own or shared DERP

Only in Kentik

  • Flow-based traffic analysis
  • Synthetic testing
  • Cloud network monitoring
  • DDoS detection
  • API-driven querying

What people use each for

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

Headscale

  • Running a mesh network where no third party may hold the device registrynot Kentik
  • A homelab or personal fleet where paying per user for a hosted control plane is not worth itnot Kentik
  • Air gapped or restricted environments that cannot reach an external coordination servicenot Kentik
  • Keeping the Tailscale client experience while removing the vendor from the trust pathnot Kentik

Kentik

  • A network engineering team at an ISP or large enterprise needing flow-level traffic visibility beyond basic uptime monitoringnot Headscale
  • A cloud-heavy organisation wanting visibility into cloud provider network cost and performance across multiple providersnot Headscale
  • A security or network operations team wanting DDoS detection layered on top of standard traffic monitoringnot Headscale
  • A team needing synthetic testing alongside passive flow analysis in one platform rather than two separate toolsnot Headscale

Where each one falls short

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

Headscale

  • The clients are proprietary software maintained by a company with no obligation to Headscale, so a client update can change protocol behaviour and break your control server until volunteers catch up.
  • Features that live on the vendor side, including the admin console, Funnel and app connectors, do not exist here and cannot be added, so feature comparisons against Tailscale are misleading.
  • There is no official web interface, so day to day administration is a command line tool or one of several unofficial front ends of varying quality and maintenance.
  • It is deliberately single tenant, so a managed service provider cannot use one deployment to serve several customer networks.
  • Upgrades have required database migrations and policy format changes between releases, and with no support contract a failed migration on the control server is your problem alone.

Kentik

  • Contracts are annual only, so there is no monthly option for a team wanting to trial the platform under real production load before committing to a year of spend
  • The Pro tier's $24,000/year starting price is a serious commitment relative to general infrastructure monitoring tools, and it is aimed specifically at flow-level traffic visibility rather than general host monitoring
  • Add-on modules for advanced DDoS protection, service provider analytics and the Firehose pipeline are priced separately, so real deployment cost frequently exceeds the Pro sticker price
  • Premier tier pricing is entirely quote-based, so organisations needing more than Pro's limits (50 users, 1,000 FPS, 120-day retention) cannot get a number without a sales conversation
  • It is a specialised flow and traffic analytics tool, not a general infrastructure monitoring platform, so most buyers will still need a separate tool like PRTG or Icinga for host and service uptime checks
  • Data retention is capped at 120 days for traffic and 45 days for forensic data even on Pro, which may be short for organisations with longer compliance or investigation requirements

Pricing, plan by plan

Headscale

Free
  • HeadscaleFree
    • Full functionality, no node limit
    • Official Tailscale clients on every platform
    • No vendor account required

Kentik

On request
  • Pro$24000/year
    • 50 users
    • 1,000 flows per second baseline
    • 2.5M synthetics credits
  • Premier$undefined/year
    • 1,000 users
    • 5M synthetics credits
    • Custom dimensions and scheduled reporting

Which should you pick?

Choose Headscale if

  • You need self hosted control server.
  • You want to start without paying.
  • You work on Linux, Docker.
  • You also want access control policies.
Headscale review

Choose Kentik if

  • You need flow-based traffic analysis.
  • You work on Web, API.
  • You also want synthetic testing.
Kentik review

Questions people ask

Is Headscale or Kentik better?
Neither clearly leads. Headscale starts at Free and Kentik at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Headscale or Kentik?
Headscale has a free tier; the other does not. Paid plans start at Free for Headscale and On request for Kentik.
Does Headscale or Kentik run on more platforms?
Headscale runs on Linux, Docker. Kentik runs on Web, API.
Can I use Headscale for free?
Yes. Headscale has a free tier, so you can try it without paying. Kentik starts at On request.
What is Headscale best used for?
Headscale is most often used for running a mesh network where no third party may hold the device registry, a homelab or personal fleet where paying per user for a hosted control plane is not worth it, air gapped or restricted environments that cannot reach an external coordination service, keeping the tailscale client experience while removing the vendor from the trust path. Of those, running a mesh network where no third party may hold the device registry and a homelab or personal fleet where paying per user for a hosted control plane is not worth it are not what Kentik is typically brought in for.
What can Headscale do that Kentik cannot?
Headscale covers Self hosted control server, Access control policies, User separation, Pre-authentication keys. Kentik covers Flow-based traffic analysis, Synthetic testing, Cloud network monitoring, DDoS detection.

Answered from the vendors’ own pages

Headscale: Is Headscale made by Tailscale?

No. It is an independent community project. Tailscale acknowledges it but does not support it, and the clients it relies on are the vendor ones.

Kentik: Is there a monthly billing option?

No, Kentik states contracts are annual only.

Headscale: What do I lose compared with the hosted service?

The admin console, the vendor relay network unless you use the public DERP servers, and hosted only features such as Funnel and app connectors.

Kentik: What is the entry price?

Pro starts at $2,000/month billed as $24,000/year for 50 users and baseline flow and synthetics quotas.

Headscale: Can I still use the public relay servers?

Yes, the default configuration can use them, though many self hosters run their own DERP to remove that dependency.

Kentik: Does Kentik replace general infrastructure monitoring tools like PRTG?

No, it is focused on flow-based traffic and network observability rather than general host and service uptime monitoring.

Headscale: Is it suitable for a company network?

For a technical team, yes. There is no vendor to escalate to, so it needs someone on staff who is willing to own the control server.

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