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Cybersecurity · head to head

authentik vs OneTrust

authentik logo

authentik

Cybersecurity

Open-source identity provider with flexible authentication flows

From
Free
Rated
-
Full reviewWebsite
OneTrust logo

OneTrust

Cybersecurity

Enterprise AI governance and data compliance platform.

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only authentik has a free tier, so it costs nothing to try first.
  • Each has a real cost: authentik smaller project than Keycloak, with a correspondingly smaller community and fewer integration guides; OneTrust complex usage-based pricing model with multiple meters (admin users, inventory size, daily visitors, data subjects) making total cost unpredictable

Where they differ

Only the attributes on which authentik and OneTrust actually diverge.

Attributes where authentik and OneTrust differ
AttributeauthentikOneTrust
Starting priceFreeOn request
Pricing modelOpen-source core with a paid enterprise tierusage-based
Free tierYesNo
PlatformsDocker, Kubernetes, Linux, Self-hostedWeb, API, Cloud

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 authentik

  • Configurable flows
  • Protocol support
  • Application proxy
  • Modern admin interface

Only in OneTrust

Nothing recorded that authentik does not also cover.

What people use each for

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

authentik

  • Self-hosted SSO across internal services without commercial identity pricingnot OneTrust
  • Putting authentication in front of applications that have none, via the proxynot OneTrust
  • Teams who tried Keycloak and wanted something less heavynot OneTrust

OneTrust

  • Fortune 500 enterprises managing multi-framework compliance (GDPR, SOC 2, EU AI Act, DORA, NIS2)not authentik
  • Organisations implementing responsible AI governance and monitoring AI systemsnot authentik
  • Companies with global data operations requiring consent and privacy automation at scalenot authentik
  • Enterprises managing complex vendor ecosystems with third-party risk assessmentnot authentik
  • Regulated industries (finance, healthcare, insurance) requiring continuous compliancenot authentik

Where each one falls short

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

authentik

  • Smaller project than Keycloak, with a correspondingly smaller community and fewer integration guides
  • The flow model is flexible but conceptually unfamiliar, and simple setups can feel over-abstracted
  • Enterprise support and some governance features sit behind the paid tier
  • Self-hosted identity is still yours to secure, patch and keep available

OneTrust

  • Complex usage-based pricing model with multiple meters (admin users, inventory size, daily visitors, data subjects) making total cost unpredictable
  • No published pricing examples or per-unit costs; all pricing requires custom quotes
  • Each solution area uses different pricing metrics, requiring complex calculations for multi-solution purchases
  • Enterprise-only positioning (Fortune 500 focus) suggests premium pricing, discouraging mid-market or startup adoption
  • Platform complexity and multiple solution areas may result in significant implementation and ongoing costs not disclosed upfront

Pricing, plan by plan

authentik

Free
  • Open sourceFree
    • Full identity provider
    • All protocols
    • Community support

OneTrust

On request
  • AI Governance$undefined/variable
    • Pricing by admin users and AI inventory size
    • AI compliance lifecycle management
    • Control enforcement and monitoring
  • Consent & Preferences$undefined/variable
    • CMP Base: priced by average daily visitors
    • CMP Suite: expanded privacy experiences
    • Universal Consent: metered by data subject profiles
  • Privacy Automation$undefined/variable
    • Priced by users and privacy asset inventory
    • Internal operations automation
    • Data subject request handling
  • Tech Risk & Compliance$undefined/variable
    • Governance and risk management across 50+ standards
    • Priced by admin users and asset inventory

Which should you pick?

Choose authentik if

  • You need configurable flows.
  • You want to start without paying.
  • You work on Docker, Kubernetes, Linux, Self-hosted.
  • You also want protocol support.
authentik review

Choose OneTrust if

  • You work on Web, API, Cloud.
OneTrust review

Questions people ask

Is authentik or OneTrust better?
Neither clearly leads. authentik starts at Free and OneTrust at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, authentik or OneTrust?
authentik has a free tier; the other does not. Paid plans start at Free for authentik and On request for OneTrust.
Does authentik or OneTrust run on more platforms?
authentik runs on Docker, Kubernetes, Linux, Self-hosted. OneTrust runs on Web, API, Cloud.
Can I use authentik for free?
Yes. authentik has a free tier, so you can try it without paying. OneTrust starts at On request.
What is authentik best used for?
authentik is most often used for self-hosted sso across internal services without commercial identity pricing, putting authentication in front of applications that have none, via the proxy, teams who tried keycloak and wanted something less heavy. Of those, self-hosted sso across internal services without commercial identity pricing and putting authentication in front of applications that have none, via the proxy are not what OneTrust is typically brought in for.
What can authentik do that OneTrust cannot?
authentik covers Configurable flows, Protocol support, Application proxy, Modern admin interface.

Answered from the vendors’ own pages

authentik: Is authentik free?

The open-source edition is free and complete for most use. An enterprise tier adds support and additional features.

OneTrust: How many case studies does OneTrust have?

OneTrust showcases 74+ customer case studies across multiple industries and regions, with examples from banking, insurance, hospitality and technology.

Source
authentik: authentik or Keycloak?

authentik is generally reported as easier to run and administer; Keycloak is more established with a larger community and Red Hat behind it.

OneTrust: What compliance standards does OneTrust support?

OneTrust covers tech risk and compliance across 50+ standards including GDPR, SOC 2, EU AI Act, DORA and NIS2.

Source
authentik: Can authentik protect apps with no login of their own?

Yes. Its application proxy places authentication in front of services that have no built-in authentication.

OneTrust: Does OneTrust automate data detection?

Yes. OneTrust automatically detects and classifies sensitive data across 200+ connectors, identifying where data lives and what regulatory requirements apply.

Source
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