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Cloud · head to head

K3s vs ProtonVPN

K3s logo

K3s

Cloud

Lightweight certified Kubernetes distribution in a single binary

From
Free
Rated
-
Full reviewWebsite
ProtonVPN logo

ProtonVPN

Cybersecurity

High-speed Swiss VPN that safeguards your privacy

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: K3s the SQLite default is single-server only; highly available control planes need etcd or an external datastore, which removes much of the simplicity; ProtonVPN free plan limited to one device at a time
  • They diverge on capability: K3s covers Single binary, ProtonVPN covers No-logs policy.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which K3s and ProtonVPN actually diverge.

Attributes where K3s and ProtonVPN differ
AttributeK3sProtonVPN
Pricing modelOpen source, no licence feefreemium
PlatformsLinux, ARM, Self-hostedWindows, macOS, Linux, iOS, Android
CategoryCloudCybersecurity
FoundedUnknown2014

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

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 K3s

  • Single binary
  • SQLite by default
  • Certified conformant
  • Batteries included
  • Low resource footprint
  • Simple install

Only in ProtonVPN

  • No-logs policy
  • Secure Core
  • Kill Switch
  • DNS leak protection
  • Tor over VPN
  • Split tunneling
  • NetShield ad-blocker
  • VPN Accelerator

What people use each for

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

K3s

  • Kubernetes on edge sites and IoT hardware where full clusters will not fitnot ProtonVPN
  • Development and CI clusters that must start fast and cost nothingnot ProtonVPN
  • Small production clusters where full Kubernetes is more operations than the workload justifiesnot ProtonVPN
  • Teaching and learning Kubernetes without cloud spendnot ProtonVPN

ProtonVPN

  • Privacy-focused browsing without subscription costnot K3s
  • Multi-device protection with Plus plan supporting 10 devicesnot K3s
  • Integrated access to Proton email and cloud services via Unlimited plannot K3s

Where each one falls short

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

K3s

  • The SQLite default is single-server only; highly available control planes need etcd or an external datastore, which removes much of the simplicity
  • Bundled components such as Traefik are opinionated defaults that larger teams often strip out and replace
  • Removed in-tree cloud provider integrations mean cloud-specific features need external controllers
  • Aimed at small and edge clusters, so very large deployments are better served by a standard distribution

ProtonVPN

  • Free plan limited to one device at a time
  • Free plan restricted to 10 countries with random selection
  • Pricing amounts not clearly published; shown as variable

Pricing, plan by plan

K3s

Free
  • K3sFree
    • Full functionality
    • No usage limits
    • Community support

ProtonVPN

Free

No published plan breakdown. See the ProtonVPN review.

Which should you pick?

Choose K3s if

  • You need single binary.
  • You want to start without paying.
  • You work on Linux, ARM, Self-hosted.
  • You also want sqlite by default.
K3s review

Choose ProtonVPN if

  • You need no-logs policy.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android.
  • You also want secure core.
ProtonVPN review

Questions people ask

Is K3s or ProtonVPN better?
Neither clearly leads. K3s starts at Free and ProtonVPN at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, K3s or ProtonVPN?
K3s starts at Free and ProtonVPN at Free.
Does K3s or ProtonVPN run on more platforms?
K3s runs on Linux, ARM, Self-hosted. ProtonVPN runs on Windows, macOS, Linux, iOS, Android.
Can I use K3s for free?
Both have a free tier, so you can try either at no cost before committing.
What is K3s best used for?
K3s is most often used for kubernetes on edge sites and iot hardware where full clusters will not fit, development and ci clusters that must start fast and cost nothing, small production clusters where full kubernetes is more operations than the workload justifies, teaching and learning kubernetes without cloud spend. Of those, kubernetes on edge sites and iot hardware where full clusters will not fit and development and ci clusters that must start fast and cost nothing are not what ProtonVPN is typically brought in for.
What can K3s do that ProtonVPN cannot?
K3s covers Single binary, SQLite by default, Certified conformant, Batteries included. ProtonVPN covers No-logs policy, Secure Core, Kill Switch, DNS leak protection.

Answered from the vendors’ own pages

K3s: Is K3s free?

Yes. K3s is open source with no licence fee. SUSE sells commercial support around Rancher separately.

K3s: Is K3s real Kubernetes?

Yes. It is CNCF-certified conformant, so standard manifests, kubectl and Helm charts work without modification.

K3s: Why is K3s smaller than Kubernetes?

It strips legacy, alpha and in-tree cloud provider code, packages everything as one binary, and defaults to SQLite instead of etcd.

K3s: Can K3s run in production?

Yes, and it does, particularly at the edge and for small clusters. For a highly available control plane you need to move off the SQLite default to etcd or an external datastore.

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