Auth0 Alternative 2026: Why Companies Switch to Sovereign Authentik

Table of Contents

• TL;DR – The Key Points in 60 Seconds
• Why an Auth0 Alternative in the First Place?
  • The cost problem: MAU pricing hits growing services
  • The enterprise-connection trap in B2B
  • Auth0 is now Okta – with everything that entails
  • The CLOUD Act problem for European companies
• What Does It Really Cost? Total Cost of Ownership Compared
  • What the table honestly does not show
• Authentik: The Modern Open-Source Alternative
  • The same protocols as Auth0 – without per-user licensing
  • The flow engine: authentication logic without code
  • Modern MFA: passkeys, WebAuthn, hardware keys
  • Open source with reliable governance
• Authentik vs. Auth0: The Feature Comparison
• The Open-Source Alternatives at a Glance
• NIS2 and GDPR: Why Sovereign Identity Management Matters in 2026
  • What NIS2 concretely requires
  • Why the supply chain with a US provider is an audit topic
• Self-Hosting vs. Managed: The Honest Calculation
• Migration from Auth0 to Authentik: The Realistic Path
• authhost: Managed Authentik on German Infrastructure
• Conclusion
• Sources

TL;DR – The Key Points in 60 Seconds

• MAU pricing scales against you: Auth0 bills per Monthly Active User – paid plans start at USD 35/month (B2C Essentials, 500 MAU) and range across USD 240 (B2C Professional) to USD 800 (B2B Professional). Every tier jump raises the bill [1].
• 2023 price increase: Auth0 raised the overage cost of the Essentials plans from USD 0.023 to USD 0.07 per MAU – roughly 300 percent – while cutting the base allowance from 1,000 to 500 MAU [2].
• Auth0 belongs to Okta: Since May 3, 2021, Auth0 has been an Okta unit (≈ USD 6.5 billion all-stock) – and therefore a US corporation under US jurisdiction [3][4].
• The CLOUD Act problem: Even the EU region does not solve the sovereignty issue – data residency is not data sovereignty [5].
• Authentik: Open source (MIT license), all relevant protocols, modern MFA, actively developed [8][10].
• Managed via authhost: Open source plus 24/7 operations on German infrastructure – from €34.90/month, unlimited users, GDPR-compliant.

Why an Auth0 Alternative in the First Place?

Auth0 is technically strong and popular with developers – the platform helped shape the modern CIAM market. But anyone buying Auth0 today or negotiating a contract renewal runs into four structural points that rarely take center stage in sales conversations. Each one is manageable on its own – in combination they become a strategic risk.

The cost problem: MAU pricing hits growing services

Auth0 bills by Monthly Active Users – users who log in at least once per month. Paid plans start at B2C Essentials from USD 35/month for 500 MAU, B2C Professional from USD 240; in the B2B segment Essentials sits at USD 150 and Professional at USD 800 per month [1]. Since September 2024 the free tier covers up to 25,000 MAU – beyond that it becomes paid, and billing follows tiers: exceeding a MAU threshold bumps you into the next price tier, often without a proportional transition.

There is also a notable pricing history. In late 2023, Auth0 raised the overage cost of the Essentials plans from USD 0.023 to USD 0.07 per MAU – a roughly 300 percent increase – while simultaneously cutting the base allowance from 1,000 MAU for USD 23 to 500 MAU for USD 35 [2]. For small but growing user bases, that noticeably shifted effective costs upward. This is the structural quirk of a MAU model: a service's success – more active users – directly drives the identity bill.

The enterprise-connection trap in B2B

The second hidden cost driver concerns B2B scenarios. Connecting business customers via enterprise SSO (SAML/OIDC connections) generally requires the more expensive B2B plans – enterprise connections are not provided in the B2C plans. Even in the B2B Professional plan at USD 800/month, the number of included enterprise connections is limited (often in the range of a handful of connections); beyond that it's "contact sales" [1][6]. For a growing B2B SaaS, that means: every larger customer that brings its own identity federation can push identity costs into a different contract bracket.

Authentik solves this structurally differently: SAML and OIDC connections are not limited or tier-bound. Via the built-in proxy provider and the LDAP outpost, even applications that can't do SSO themselves can be secured – with no surcharge per connection.

Auth0 is now Okta – with everything that entails

Auth0 was acquired by Okta on May 3, 2021 – in an all-stock transaction worth around USD 6.5 billion [3][4]. The platform is run as an independent unit within Okta, but it belongs strategically and legally to the Okta group. That matters for vendor risk assessment: Auth0 thus shares Okta's corporate structure and US jurisdiction – a provider with several documented security incidents in recent years, including the October 2023 support-system breach, where attackers used a compromised service account to access files of 134 customers; session tokens contained in uploaded HAR files then enabled the hijacking of five customer sessions [7]. Anyone asking the Auth0 question should therefore also consider the Okta perspective.

The CLOUD Act problem for European companies

Auth0 offers an EU region where CIAM data resides in European data centers [5]. But that does not fully resolve data sovereignty. What matters is not only where the data sits, but who can legally access it. As a US corporation, Auth0/Okta is subject to the US CLOUD Act, which obliges American companies to grant US authorities access to customer data on request – regardless of storage location [5]. Data residency in the EU is therefore not the same as data sovereignty: the former guarantees the storage location, the latter restricts access by foreign operators. And NIS2 explicitly requires supply chain security measures – belonging to a US-corporate group is a point that a sound risk analysis has to name.

What Does It Really Cost? Total Cost of Ownership Compared

The following table shows the real total costs for a typical mid-sized company using Auth0 for internal employee SSO plus some B2B connections – modeled via a B2B Professional scenario. It deliberately distinguishes between pure Auth0 SaaS, a fully self-operated Authentik (DIY), and Managed Authentik via authhost. The Auth0 figures should be read as a realistic order of magnitude, not a fixed price – the actual MAU volume and number of enterprise connections determine the final amount.

The figures for authhost Business refer to the plan at €104.90/month with annual billing (€1,258.80/year) – unlimited users included. The decisive structural difference: with Auth0 the bill grows with every active user and every enterprise connection, while with authhost the flat rate stays the same – whether the 50th or the 5,000th user joins.

What the table honestly does not show

It would be dishonest to portray Auth0 only as "expensive." Three areas where Auth0 is genuinely strong:

• excellent, developer-friendly documentation and mature SDKs for practically every platform,
• many pre-built social and enterprise connections, plus a large extensibility library (Actions/Rules),
• proven CIAM ergonomics for consumer logins, including Universal Login and hosted login pages.

For a pure consumer SaaS with high development velocity and a manageable MAU count, Auth0 can be the right choice. For German SMBs with internal employee SSO, mixed B2B scenarios, and clear GDPR and NIS2 requirements, the answer is often a different one.

Comparison based on publicly available information, as of May 2026. Auth0 prices in US dollars, authhost prices in euros. Features, prices, and tiers can change at any time – please verify directly with the respective provider. Auth0® and Okta® are trademarks of Okta, Inc. Authentik is open-source software; the project is maintained by Authentik Security, Inc. (USA). authhost is an independent managed hosting provider and is not affiliated with these companies.

Authentik: The Modern Open-Source Alternative

Authentik is an open-source identity provider that launched in 2018 and explicitly positions itself as a more modern alternative to commercial IdPs [8]. The project has over 21,000 GitHub stars [10] and is actively developed.

The same protocols as Auth0 – without per-user licensing

Authentik supports all relevant standards: OAuth 2.0, OpenID Connect, SAML 2.0, LDAP, RADIUS, and SCIM [8]. For SSO across internal and cloud applications, MFA for employees, and centralized user management, Authentik offers the same functional core as Auth0 – just open source and without MAU- or connection-based licensing. The proxy outpost can also secure applications that don't support SSO themselves, and the LDAP outpost connects legacy systems and network devices. In addition, Authentik provides a remote access gateway for RDP, SSH, and VNC – a capability not part of classic CIAM platforms like Auth0 [8].

The flow engine: authentication logic without code

The heart of Authentik is the flow system. Instead of rigid configuration screens, you assemble authentication workflows from individual "stages" – identification, password, MFA, consent – and control them dynamically via policies:

• Access from the corporate network? → Skip 2FA.
• Login from an unknown IP? → Require a hardware key.
• New employee? → Automatically assign to the right group.

You configure all of this through the admin UI – no code, no YAML files. This visual flexibility functionally matches what Auth0 expresses through programmatic Actions and Rules – just without every customization ending up in vendor-specific code.

Modern MFA: passkeys, WebAuthn, hardware keys

Authentik supports the full spectrum of modern multi-factor authentication: TOTP via authenticator apps, WebAuthn and passkeys as phishing-resistant methods, FIDO2 hardware keys such as YubiKey, email OTP, and Duo integration [8]. This lets Authentik meet the authentication requirements that NIS2 demands of regulated companies – without a higher tier becoming necessary.

Open source with reliable governance

Authentik is licensed under the MIT license and can therefore be used freely, including commercially [9]. Behind the project is Authentik Security, Inc., organized as a US public benefit corporation – a structure that legally backs the open-source commitment. The company has committed to never moving features from the open-source version to the enterprise version; the trend goes the other way – Remote Access Control was moved from Enterprise to Open Source in 2025 [9]. For vendor risk assessment, that is an important difference from a pure SaaS model, where features and prices can be changed unilaterally.

Authentik vs. Auth0: The Feature Comparison

✓ = fully met · ➖ = partial / with limitations · ✗ = not met

Comparison based on publicly available information, as of May 2026. Features and tiers can change at any time. Auth0® and Okta® are trademarks of Okta, Inc.

The Open-Source Alternatives at a Glance

Authentik is not the only open-source identity provider. A brief overview of where the strengths lie:

For SMBs with a mixed cloud and legacy stack, Authentik best hits the sweet spot between feature scope and operability. If you want the direct comparison: in Authentik vs. Authelia vs. Keycloak we go through the three most-used options in detail, in our Keycloak Alternative for SMBs we show why Keycloak is often overkill for smaller teams, and in Authentik vs. Entra ID we position Authentik against Microsoft's identity platform.

NIS2 and GDPR: Why Sovereign Identity Management Matters in 2026

For European decision-makers, the question of an Auth0 alternative is not just a cost question but increasingly a regulatory one.

What NIS2 concretely requires

The NIS2 Directive requires affected companies to implement a bundle of risk-management measures – including explicitly multi-factor authentication or continuous authentication, access control, supply chain security measures, and traceable logging [11]. Cybersecurity thus becomes a management responsibility: it can no longer be fully delegated to a service provider. Centralized, well-documented identity management is exactly one of the building blocks that has to be demonstrated in a NIS2 context.

Why the supply chain with a US provider is an audit topic

A central identity provider in the hands of a US corporation is, on the NIS2 points "supply chain security" and "data sovereignty," something that must be documented and justified – and the EU region changes that only partly because of the CLOUD Act. Authentik, operated as a managed service on German infrastructure, flips that argument around: hosting in Germany, a data processing agreement included, open-source and therefore auditable software, full data control. Compliance responsibility stays with the company – but the technical and organizational basis is in place.

Self-Hosting vs. Managed: The Honest Calculation

Self-hosting saves the license costs – but it isn't free. Anyone running Authentik themselves takes on setup, security updates, database maintenance, backups, monitoring, and TLS certificates. Above all, they take on responsibility for availability: if the identity provider goes down, nobody can access the connected applications anymore. In an emergency, that requires 24/7 readiness that small IT teams can rarely sustain permanently.

authhost is the middle ground. We operate your dedicated Authentik instance as a managed service on infrastructure in Germany – with automatic, pre-tested updates, daily backups, 24/7 monitoring, and German-speaking support from a team that uses Authentik productively in its own stack. You keep full data control and open-source freedom; we take on the operational effort. The feature overview shows what's in every instance.

Migration from Auth0 to Authentik: The Realistic Path

The good news: a migration is protocol-oriented and therefore plannable with low risk. Because Authentik speaks the same standards as Auth0 – OIDC, SAML, SCIM – the switch can be carried out step by step and without a hard cut-off date.

1. Set up Authentik in parallel. The new instance runs alongside Auth0 without shutting anything down.
2. Migrate applications app by app. Each application is reconnected individually – typically a few minutes per app.
3. Bring over the user directory. Users and profiles can be exported and imported via SCIM or bulk import; passwords migrate via a bulk export or just-in-time migration on first login if needed.
4. Decommission Auth0 after a successful cut-over. Only when everything is running does the Auth0 contract end.

Parallel operation is the key: the same application can temporarily be connected to Auth0 and Authentik, so you can switch over in a controlled way. Realistic timeframe for a mid-sized setup: 1–4 weeks, depending on the number of apps, the MFA setup, and any custom logic (in Auth0 often Actions/Rules, which are rebuilt as flows in Authentik). In the Business plan, a personal setup call accompanies the migration; in the Enterprise plan, individual onboarding support is added.

authhost: Managed Authentik on German Infrastructure

authhost operates Authentik as a fully managed service – a dedicated instance, hosting in Germany, GDPR-compliant. Three plans, all with unlimited users:

• Starter – from €34.90/month: Dedicated Authentik instance, SSO (OIDC, SAML, LDAP, SCIM, RADIUS), MFA, login flows, proxy provider, remote access gateway, 24/7 monitoring, automatic backups & updates, email support (48 h). Recommended up to 250 users.
• Business – from €104.90/month: Everything in Starter, plus more hardware specs, priority support (4 h SLA), and a personal setup call. Recommended up to 1,000 users.
• Enterprise – on request: For more than 1,000 users. Dedicated infrastructure, a dedicated contact (2 h SLA), custom onboarding, a 99.99% SLA guarantee, and an on-premise option.

All plans can be canceled monthly, have no setup fee, and include a data processing agreement and automatic backups. Every plan includes a 7-day free trial.

→ View plans & pricing | → Start free trial

Conclusion

Auth0 is a technically mature CIAM platform – and for pure consumer services with high development velocity it remains a valid option. But for German SMBs the math has shifted: MAU pricing, tier-bound enterprise connections, the corporate ties to Okta, and the CLOUD Act issue make Auth0 a hard-to-plan and regulatorily uncomfortable option in 2026.

Authentik delivers the same core functions open source, without MAU licensing, and with full data control. The only real hurdle is the operational effort – and that is exactly what authhost takes off your hands: Managed Authentik on German infrastructure, GDPR-compliant, with predictable costs from €34.90/month. Anyone looking for a sovereign, future-proof Auth0 alternative will find it here.

Start Managed Authentik now →

Sources

1. Auth0 – Official pricing overview: auth0.com
2. SSOJet – Auth0 pricing & 2023 MAU overage increase: ssojet.com
3. Auth0 – "Okta Completes Acquisition of Auth0" (closed May 3, 2021): auth0.com
4. Information Age – Okta completes USD 6.5 billion acquisition of Auth0: information-age.com
5. Gupta Deepak – Data residency vs. sovereignty in CIAM (CLOUD Act): guptadeepak.com
6. Auth0 Community – Enterprise (SAML) connections & B2B plans: community.auth0.com
7. Okta Security – Root cause of the support-system breach (October 2023): sec.okta.com
8. Authentik – Official website & features (protocols, MFA, proxy, RAC): goauthentik.io
9. Authentik – Open Source RAC & license commitment: goauthentik.io
10. Authentik – GitHub repository (MIT license): github.com
11. NIS2 Directive (EU) 2022/2555 – risk-management measures (Art. 21): eur-lex.europa.eu