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Cybersecurity · head to head

Cosign vs CyberGhost VPN

Cosign logo

Cosign

Cybersecurity

Signs and verifies container images and artifacts, with or without managing keys

From
Free
Rated
-
Full reviewWebsite
C

CyberGhost VPN

Cybersecurity

Consumer VPN operated from Romania and owned by Kape Technologies, with a no-logs claim audited by Deloitte.

From
$2.19/month
Rated
-
Full reviewWebsite

The short version

  • Only Cosign has a free tier, so it costs nothing to try first.
  • Each has a real cost: Cosign keyless signing inherits every weakness of the identity provider behind it. Sigstore’s own threat model states that if an identity provider is compromised, Sigstore will issue certificates to those identities, so a compromised account produces perfectly valid signatures.; CyberGhost VPN kape Technologies, the parent, was formerly Crossrider, a browser extension platform whose technology was widely used to distribute adware, and Kape now also owns VPN review sites, so third-party rankings a buyer might use to verify the product can come from the same corporate group.
  • They diverge on capability: Cosign covers Keyless signing, CyberGhost VPN covers NoSpy servers.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cosign and CyberGhost VPN actually diverge.

Attributes where Cosign and CyberGhost VPN differ
AttributeCosignCyberGhost VPN
Starting priceFree$2.19/month
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsmacOS, Linux, Windows, DockerWeb, Desktop, Mobile
FoundedUnknown2011

Identical on both: user rating (Not yet rated), category (Cybersecurity).

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 Cosign

  • Keyless signing
  • Key and KMS signing
  • Registry-native storage
  • In-toto attestations
  • Offline verification
  • Trusted root and signing config

Only in CyberGhost VPN

  • NoSpy servers
  • Audited no-logs policy
  • WireGuard, OpenVPN and IKEv2
  • Streaming-labelled servers
  • Dedicated IP via token
  • Kill switch
  • Split tunnelling
  • Smart Rules

What people use each for

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

Cosign

  • Signing container images in a build pipeline without managing long-lived private keysnot CyberGhost VPN
  • Attaching a signed bill of materials to a release so consumers can verify its provenancenot CyberGhost VPN
  • Meeting a customer or regulatory requirement for signed artifactsnot CyberGhost VPN
  • Verifying third-party images before they enter an internal registrynot CyberGhost VPN

CyberGhost VPN

  • A household that wants one subscription covering several devices for streaming and public Wi-Finot Cosign
  • A buyer who specifically wants a provider outside the Fourteen Eyes with a published third-party no-logs auditnot Cosign
  • Torrenting on a connection where the internet provider throttles or logs peer-to-peer trafficnot Cosign
  • Travellers needing to reach home-country services from abroad without configuring anything technicalnot Cosign

Where each one falls short

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

Cosign

  • Keyless signing inherits every weakness of the identity provider behind it. Sigstore’s own threat model states that if an identity provider is compromised, Sigstore will issue certificates to those identities, so a compromised account produces perfectly valid signatures.
  • A signature proves who signed, never whether they should have. The documentation is explicit that Sigstore cannot determine authorisation, so every consumer must write and maintain their own identity and issuer policy or verification means nothing.
  • Nothing is enforced without an admission controller. Signing changes what you can prove, not what runs, and the official policy controller has a small maintainer base for a component sitting in a cluster admission path.
  • Upgrades break pipelines. Version 3 changed defaults, version 4 is announced as removing legacy functionality and roughly half the command line flags, and two official client libraries still lacked support for the new log format as of mid 2026.
  • Signatures do not expire. An artifact signed before a maintainer account was compromised and one signed after are indistinguishable unless somebody is actively monitoring the transparency log, and almost nobody is.

CyberGhost VPN

  • Kape Technologies, the parent, was formerly Crossrider, a browser extension platform whose technology was widely used to distribute adware, and Kape now also owns VPN review sites, so third-party rankings a buyer might use to verify the product can come from the same corporate group.
  • Pricing is structured so that the deep discount applies to the longest initial term and the standard rate applies at renewal, which means the figure used to make the decision is not the figure paid in year three unless the subscriber renegotiates or churns.
  • The Deloitte engagement is point-in-time assurance over stated policy and server configuration, so it confirms things were as described when examined and says nothing about how the infrastructure behaves today or after an ownership change.
  • Client capability differs sharply by platform: the Linux client is command-line only and lacks the kill switch and split tunnelling that the Windows client has, so a mixed-device household does not get the protection that reviews of the Windows app describe.
  • Streaming-optimised server labels go stale because platforms block address ranges continually, and the practical support answer is to try a different server, which makes the labelled-server feature less dependable than the marketing implies.

Pricing, plan by plan

Cosign

Free
  • CosignFree
    • Apache-2.0
    • Public Sigstore infrastructure free to use
    • No usage limits published

CyberGhost VPN

$2.19/month
  • 1 Month$12.99/month
    • 7 devices
    • 9000+ servers
    • Unlimited bandwidth
  • 2 Years + 2 Months$2.19/month
    • All features
    • Best value
    • 45-day guarantee
  • 6 Months$6.99/month
    • All features
    • 45-day guarantee

Which should you pick?

Choose Cosign if

  • You need keyless signing.
  • You want to start without paying.
  • You work on macOS, Linux, Windows, Docker.
  • You also want key and kms signing.
Cosign review

Choose CyberGhost VPN if

  • You need nospy servers.
  • You work on Web, Desktop, Mobile.
  • You also want audited no-logs policy.
CyberGhost VPN review

Questions people ask

Is Cosign or CyberGhost VPN better?
Neither clearly leads. Cosign starts at Free and CyberGhost VPN at $2.19/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cosign or CyberGhost VPN?
Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and $2.19/month for CyberGhost VPN.
Does Cosign or CyberGhost VPN run on more platforms?
Cosign runs on macOS, Linux, Windows, Docker. CyberGhost VPN runs on Web, Desktop, Mobile.
Can I use Cosign for free?
Yes. Cosign has a free tier, so you can try it without paying. CyberGhost VPN starts at $2.19/month.
What is Cosign best used for?
Cosign is most often used for signing container images in a build pipeline without managing long-lived private keys, attaching a signed bill of materials to a release so consumers can verify its provenance, meeting a customer or regulatory requirement for signed artifacts, verifying third-party images before they enter an internal registry. Of those, signing container images in a build pipeline without managing long-lived private keys and attaching a signed bill of materials to a release so consumers can verify its provenance are not what CyberGhost VPN is typically brought in for.
What can Cosign do that CyberGhost VPN cannot?
Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. CyberGhost VPN covers NoSpy servers, Audited no-logs policy, WireGuard, OpenVPN and IKEv2, Streaming-labelled servers.

Answered from the vendors’ own pages

Cosign: Does Cosign tell me if an image is vulnerable?

No. It has no vulnerability knowledge whatsoever. It can carry an SBOM as a signed attestation but never reads it. Pair it with a scanner.

CyberGhost VPN: Who owns CyberGhost?

Kape Technologies, which acquired it in 2017. Kape was formerly called Crossrider and also owns ExpressVPN, Private Internet Access and Zenmate, plus the review sites vpnMentor and Wizcase.

Cosign: Is signing alone enough?

No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.

CyberGhost VPN: Has the no-logs claim been independently audited?

Yes. Deloitte has examined the no-logs policy and server configuration and published an assurance report. Note that this is a point-in-time engagement, not continuous monitoring.

Cosign: What does a bare cosign verify actually prove?

Very little. Without a pinned certificate identity and OIDC issuer, it accepts a valid signature from any identity at all.

CyberGhost VPN: What jurisdiction is it under?

The service is operated from Romania, which has no mandatory communications data retention law in force and is not a member of the Five, Nine or Fourteen Eyes intelligence-sharing arrangements. Ownership sits with Kape, headquartered in the UK.

Cosign: What is the risk of keyless signing?

Your OIDC provider becomes the root of trust. Compromise of that account yields genuine, verifiable signatures, so account security is the control that matters.

CyberGhost VPN: Does it work with streaming services?

Often, using the servers labelled for each service, but this changes constantly as platforms block address ranges. Treat streaming access as a feature that may stop working on any given day rather than a guarantee.

Cosign: Should we expect breaking changes?

Yes. Version 4 is announced to remove roughly half the flags, and a post-quantum migration is named as a further breaking change after that.

CyberGhost VPN: Can I use it on Linux or a router?

There is a command-line Linux client with fewer features than the desktop apps, and router use requires manual OpenVPN configuration rather than an official app.

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