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Cybersecurity · head to head

ProtonVPN vs Seldon

ProtonVPN logo

ProtonVPN

Cybersecurity

High-speed Swiss VPN that safeguards your privacy

From
Free
Rated
-
Full reviewWebsite
Seldon logo

Seldon

Machine Learning

Kubernetes model serving whose current version is licensed under the Business Source Licence

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: ProtonVPN free plan limited to one device at a time; Seldon seldon Core v2 is under the Business Source Licence rather than Apache 2.0, so production use requires a commercial agreement, and a team that evaluated it believing it was open source discovers the licence is the blocker exactly when the project is ready to ship.
  • They diverge on capability: ProtonVPN covers No-logs policy, Seldon covers Kubernetes custom resources.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which ProtonVPN and Seldon actually diverge.

Attributes where ProtonVPN and Seldon differ
AttributeProtonVPNSeldon
PlatformsWindows, macOS, Linux, iOS, AndroidLinux
CategoryCybersecurityMachine Learning

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), user rating (Not yet rated), founded (2014).

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 ProtonVPN

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

Only in Seldon

  • Kubernetes custom resources
  • Inference graphs
  • Traffic strategies
  • Open Inference Protocol
  • Alibi Explain
  • Alibi Detect
  • Kafka-backed pipelines in v2
  • Commercial control plane

What people use each for

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

ProtonVPN

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

Seldon

  • Serving an ensemble or a multi-stage inference path as one versioned deployment rather than as a chain of separate servicesnot ProtonVPN
  • Running genuine production experiments where a share of live traffic goes to a candidate model and the results are comparednot ProtonVPN
  • Regulated environments needing explanations and drift monitoring attached to the served model rather than bolted on laternot ProtonVPN
  • Organisations with an established Kubernetes platform team who want serving expressed as manifests under existing deployment controlsnot ProtonVPN

Where each one falls short

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

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

Seldon

  • Seldon Core v2 is under the Business Source Licence rather than Apache 2.0, so production use requires a commercial agreement, and a team that evaluated it believing it was open source discovers the licence is the blocker exactly when the project is ready to ship.
  • Core v1 remains Apache 2.0 but is in maintenance, so taking the free route means running software that receives no new development while the architecture it belongs to moves on without it.
  • Version 2 is a different system rather than a newer release, with different custom resources, a scheduler component and a Kafka-based pipeline model, so migrating from v1 is a re-implementation of every deployment manifest rather than an upgrade.
  • Kafka is a dependency for v2 pipelines, so an organisation that does not already operate it takes on a distributed log with its own storage, retention, rebalancing and failure modes purely in order to serve models.
  • Everything assumes Kubernetes fluency and the failure modes are Kubernetes failure modes, custom resource version mismatches, an operator that will not reconcile, admission webhooks and resource limits terminating an inference pod mid-request, so it needs a platform engineer rather than a data scientist.

Pricing, plan by plan

ProtonVPN

Free

No published plan breakdown. See the ProtonVPN review.

Seldon

Free
  • Seldon CoreFree
    • Open source
    • Kubernetes deployment
    • Model serving
  • Seldon DeployFree
    • Enterprise features
    • GUI
    • Monitoring

Which should you pick?

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

Choose Seldon if

  • You need kubernetes custom resources.
  • You want to start without paying.
  • You work on Linux.
  • You also want inference graphs.
Seldon review

Questions people ask

Is ProtonVPN or Seldon better?
Neither clearly leads. ProtonVPN starts at Free and Seldon at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ProtonVPN or Seldon?
ProtonVPN starts at Free and Seldon at Free.
Does ProtonVPN or Seldon run on more platforms?
ProtonVPN runs on Windows, macOS, Linux, iOS, Android. Seldon runs on Linux.
Can I use ProtonVPN for free?
Both have a free tier, so you can try either at no cost before committing.
What is ProtonVPN best used for?
ProtonVPN is most often used for privacy-focused browsing without subscription cost, multi-device protection with plus plan supporting 10 devices, integrated access to proton email and cloud services via unlimited plan. Of those, privacy-focused browsing without subscription cost and multi-device protection with plus plan supporting 10 devices are not what Seldon is typically brought in for.
What can ProtonVPN do that Seldon cannot?
ProtonVPN covers No-logs policy, Secure Core, Kill Switch, DNS leak protection. Seldon covers Kubernetes custom resources, Inference graphs, Traffic strategies, Open Inference Protocol.

Answered from the vendors’ own pages

Seldon: Is Seldon open source?

Partly, and this is the thing to check before you build on it. Core v1 is Apache 2.0 but in maintenance. Core v2 was moved to the Business Source Licence in 2024, which allows evaluation but not unlicensed production use. Verify the current licence of each component you intend to run, including MLServer and the Alibi libraries.

Seldon: What is the difference between v1 and v2?

Architecture, not just version number. v2 introduces a scheduler, a different set of custom resources and Kafka-backed pipelines. Manifests, mental model and operations all change, so treat a move as a project.

Seldon: Do I need Kubernetes?

Yes. It is a Kubernetes-native system and there is no meaningful deployment without a cluster and someone competent to run it.

Seldon: What is MLServer?

Seldon's Python inference server implementing the Open Inference Protocol, usable inside Seldon deployments or on its own. Check its current licence alongside Core's, since the company has moved projects onto the Business Source Licence.

Seldon: Do I have to run Kafka?

For v2 pipelines, yes. If you only need single models served, that dependency is a large amount of infrastructure for the benefit, and a simpler serving layer may be the better answer.

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