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title: "Auth0 alternatives in 2026 — IDSync"
description: "Compare the top Auth0 alternatives for CIAM and developer auth. Editorial picks across enterprise, startup, developer-first, and open source."
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# Best Auth0 alternatives in 2026

Last updated 3 months ago

Quick answer

## Best Auth0 alternatives in 2026

Short answer

The best Auth0 alternatives are WorkOS for B2B SaaS, Clerk for product-led startups, Stytch for passwordless-first apps, FusionAuth for self-hosted CIAM, and Keycloak for open source.

Related tools & categories

[Customer Identity / CIAM](/directory/category/ciam)[SSO](/directory/category/sso)[Developer Authentication](/directory/category/developer-auth)

## Best options at a glance

Category

Tool

Best for

Best overall

[WorkOS](/directory/workos)

B2B SaaS companies that are losing or at risk of losing enterprise deals because they lack SAML SSO, SCIM directory sync, or audit logs, and want to ship these features quickly without deep identity protocol expertise.

Best for enterprise

[Frontegg](/directory/frontegg)

B2B SaaS companies that need a complete user management layer — not just authentication but also tenant administration, RBAC, and self-service customer portals — without building this infrastructure themselves.

Best for startups

[Clerk](/directory/clerk)

Development teams building B2B or B2C SaaS products on React, Next.js, or modern JavaScript frameworks who want polished authentication UI without building it from scratch, and who need organization management alongside standard authentication features.

Best developer-first

[Stytch](/directory/stytch)

Development teams that prefer full control over authentication UI, want passwordless authentication as a first-class experience, and are building consumer or B2B applications where authentication UX is a core product differentiator.

Best open source

[Keycloak](/directory/keycloak)

Organizations that require a fully open source, self-hosted IAM platform with enterprise-grade features and no licensing cost. Strong fit for large enterprises with technical resources to operate it, government agencies with data sovereignty requirements, and universities or research institutions managing complex identity federation.

Buyer help

### Request a vendor shortlist

Tell us what you're evaluating and IDSync will identify the identity, access, and security tools that fit your use case.

[Request shortlist →](/request-shortlist)

## Vendor comparison

Vendor

Best for

Deployment

Open source

Pricing

![Auth0 company logo](https://www.google.com/s2/favicons?sz=128&domain=auth0.com)

[Auth0](/directory/auth0)

Reference 

Development teams building web and mobile applications that need feature-rich, standards-compliant authentication with minimal identity infrastructure overhead. Particularly strong for applications requiring both consumer authentication (social login, passwordless) and enterprise authentication (SAML SSO, SCIM).

SaaS / Cloud-hosted

[MAU-based (monthly active users); M2M tokens priced separately; enterprise plans available](https://auth0.com/pricing)

![WorkOS company logo](https://www.google.com/s2/favicons?sz=128&domain=workos.com)

[WorkOS](/directory/workos)

Best overall 

B2B SaaS companies that are losing or at risk of losing enterprise deals because they lack SAML SSO, SCIM directory sync, or audit logs, and want to ship these features quickly without deep identity protocol expertise.

SaaS / Cloud-hosted

[Per SSO/Directory Sync connection per month](https://workos.com/pricing)

![Frontegg company logo](https://www.google.com/s2/favicons?sz=128&domain=frontegg.com)

[Frontegg](/directory/frontegg)

Best for enterprise 

B2B SaaS companies that need a complete user management layer — not just authentication but also tenant administration, RBAC, and self-service customer portals — without building this infrastructure themselves.

SaaS / Cloud-hosted

[MAU and/or tenant-based; free tier available](https://frontegg.com/pricing)

![Clerk company logo](https://www.google.com/s2/favicons?sz=128&domain=clerk.com)

[Clerk](/directory/clerk)

Best for startups 

Development teams building B2B or B2C SaaS products on React, Next.js, or modern JavaScript frameworks who want polished authentication UI without building it from scratch, and who need organization management alongside standard authentication features.

SaaS / Cloud-hosted

[MAU-based (monthly active users); free tier available](https://clerk.com/pricing)

![Stytch company logo](https://www.google.com/s2/favicons?sz=128&domain=stytch.com)

[Stytch](/directory/stytch)

Best developer-first 

Development teams that prefer full control over authentication UI, want passwordless authentication as a first-class experience, and are building consumer or B2B applications where authentication UX is a core product differentiator.

SaaS / Cloud-hosted

[MAU-based; separate B2C and B2B products](https://stytch.com/pricing)

![Keycloak company logo](https://www.google.com/s2/favicons?sz=128&domain=keycloak.org)

[Keycloak](/directory/keycloak)

Best open source 

Organizations that require a fully open source, self-hosted IAM platform with enterprise-grade features and no licensing cost. Strong fit for large enterprises with technical resources to operate it, government agencies with data sovereignty requirements, and universities or research institutions managing complex identity federation.

Self-hosted

Free (open source); Red Hat SSO commercial support available separately

Buyer help

### Request a vendor shortlist

Tell us what you're evaluating and IDSync will identify the identity, access, and security tools that fit your use case.

[Request shortlist →](/request-shortlist)

## When to choose each tool

### [Auth0](/directory/auth0)

Auth0 is a developer-centric customer identity and access management (CIAM) platform offering authentication, authorization, and user management for web and mobile applications, now operating as Okta Customer Identity Cloud.

Choose when

You need development teams building web and mobile applications that need feature-rich, standards-compliant authentication with minimal identity infrastructure overhead. particularly strong for applications requiring both consumer authentication (social login, passwordless) and enterprise authentication (saml sso, scim)..

Skip when

Your priorities sit outside Auth0's core focus areas.

### [WorkOS](/directory/workos)

WorkOS provides a developer API for adding enterprise identity features — SSO, SCIM directory sync, audit logs, and admin portals — to B2B SaaS applications, enabling faster enterprise sales readiness.

Choose when

You need b2b saas companies that are losing or at risk of losing enterprise deals because they lack saml sso, scim directory sync, or audit logs, and want to ship these features quickly without deep identity protocol expertise..

Skip when

Your priorities sit outside WorkOS's core focus areas.

### [Frontegg](/directory/frontegg)

Frontegg provides a full user management and authentication platform for B2B SaaS companies, including enterprise SSO, multi-tenancy, RBAC, audit logs, and self-service admin portals for end customers.

Choose when

You need b2b saas companies that need a complete user management layer — not just authentication but also tenant administration, rbac, and self-service customer portals — without building this infrastructure themselves..

Skip when

Your priorities sit outside Frontegg's core focus areas.

### [Clerk](/directory/clerk)

Clerk provides drop-in authentication UI components and a complete user management platform for React, Next.js, and modern web applications, including B2B organization management and enterprise SSO.

Choose when

You need development teams building b2b or b2c saas products on react, next.js, or modern javascript frameworks who want polished authentication ui without building it from scratch, and who need organization management alongside standard authentication features..

Skip when

Your priorities sit outside Clerk's core focus areas.

### [Stytch](/directory/stytch)

Stytch is an API-first authentication platform offering passwordless authentication (magic links, OTPs, passkeys), session management, and B2B organization management with a clean, headless developer experience.

Choose when

You need development teams that prefer full control over authentication ui, want passwordless authentication as a first-class experience, and are building consumer or b2b applications where authentication ux is a core product differentiator..

Skip when

Your priorities sit outside Stytch's core focus areas.

### [Keycloak](/directory/keycloak)

Keycloak is the most widely deployed open source IAM platform, providing enterprise-grade SSO, MFA, SAML, OIDC, LDAP, and Kerberos support in a self-hosted, Apache 2.0 licensed package maintained by Red Hat.

Choose when

You need organizations that require a fully open source, self-hosted iam platform with enterprise-grade features and no licensing cost. strong fit for large enterprises with technical resources to operate it, government agencies with data sovereignty requirements, and universities or research institutions managing complex identity federation..

Skip when

Your priorities sit outside Keycloak's core focus areas.

## Implementation considerations

-   Confirm SSO, SCIM, and MFA requirements with your security and IT teams before shortlisting.
-   Map directory sources (HRIS, AD, Google Workspace) and provisioning targets to validate coverage.
-   Review audit logging, session controls, and admin RBAC against your compliance scope (SOC 2, ISO 27001, HIPAA, FedRAMP).
-   For developer-first stacks, evaluate SDK quality, framework support, and webhook reliability.
-   For enterprise stacks, plan a 60–90 day pilot covering federation, lifecycle, and governance flows.

## Pricing considerations

Most identity vendors price on monthly active users, employees, or features (SSO, MFA, lifecycle, governance). Always request a multi-year quote, validate add-on fees (SCIM, advanced MFA, audit logs), and account for implementation services.

## Best Auth0 alternatives at a glance

Tool

Best for

Key strength

Pricing model

Open source?

Clerk

Modern web/SaaS apps

Best-in-class DX, pre-built UI

MAU-based

No

Stytch

Passwordless, B2C

Flexible auth APIs, passkeys

MAU-based

No

WorkOS

B2B SaaS enterprise features

Fast enterprise SSO/SCIM embed

Per-connection

No

Zitadel

Self-hosted, cloud-native

Open source, OIDC/SAML, multi-tenant

Open core

Yes

Keycloak

Open source enterprise

Mature, self-hosted, broad protocol support

Free (self-host)

Yes

Firebase Auth

Mobile/Google ecosystem

Simple setup, Google integration

Pay-as-you-go

No

Cognito

AWS-native apps

Deep AWS integration

MAU-based

No

FusionAuth

Self-hosted or cloud

Flexible deployment, strong community

Per-user or flat

Yes (community)

Supabase Auth

Supabase/Postgres apps

Integrated with Supabase platform

Usage-based

Yes

Logto

Developer-first CIAM

Modern UI, open source, multi-tenant

Open core

Yes

## Who this page is for

This page is for developers, engineering leads, and technical founders who are building applications and need a customer identity and access management (CIAM) solution — but are questioning whether Auth0 is the right fit.

You may be evaluating Auth0 for a new project and want to understand the landscape before committing. Or you may already be on Auth0 and encountering friction: pricing that has become hard to predict at scale, complexity in the rules/actions system, concerns about the Okta acquisition's effect on product direction, or simply a desire for a more modern developer experience.

This guide is also useful for B2B SaaS founders who need to offer enterprise SSO, SCIM, and audit logs to their customers and are deciding whether Auth0's enterprise features or a purpose-built alternative like WorkOS is the better path.

## How to choose

### Clarify your authentication use case

Auth0 and its alternatives span a wide range: consumer identity (B2C), business-to-business identity (B2B SaaS), and workforce identity (employees). These are different problems with different requirements. Clerk and Stytch are optimized for consumer and developer-facing products. WorkOS is purpose-built for the "add enterprise SSO to your B2B SaaS" use case. Keycloak and FusionAuth are flexible enough to handle multiple scenarios but require more configuration. Be clear about your primary use case before evaluating.

### Assess your MAU trajectory

Most CIAM platforms price on monthly active users. Auth0's MAU pricing can become expensive at mid-to-high scale. When modeling alternatives, stress-test pricing at 10x your current MAU. Some vendors offer flat-rate or per-seat pricing that is more predictable. Verify all pricing directly with vendors — this space changes frequently.

### Evaluate pre-built UI components vs. API flexibility

Some teams want to drop in a pre-built login UI (Clerk, Auth0's Universal Login). Others want maximum flexibility through APIs and build their own UI entirely (Stytch). Know which you need — it significantly narrows the field.

### Consider self-hosting and data residency needs

If you have strict data residency requirements, need to keep authentication infrastructure in your own cloud, or simply want to avoid vendor dependency, open source self-hosted options (Keycloak, Zitadel, FusionAuth) deserve serious consideration. Be realistic about the operational overhead — self-hosting a production identity system is a meaningful engineering commitment.

### Weigh enterprise SSO requirements

If your customers are enterprise companies that will require SAML SSO, SCIM provisioning, and audit logs, evaluate whether your chosen platform makes this easy to implement. Auth0 supports these features but they can require significant configuration. WorkOS and Clerk's B2B features are purpose-built for this use case and typically faster to integrate.

### Review the ecosystem and integration library

Auth0's integration catalog is extensive. Before switching, audit which integrations you actively rely on and verify that your target platform supports them natively or via standards-based SAML/OIDC.

## When to stick with Auth0

Auth0 remains a strong choice for many teams. Its documentation is among the best in the industry, its SDK coverage is extensive (covering virtually every language and framework), and its Universal Login experience is polished and customizable.

If you have already built significant logic into Auth0 Actions, Rules, or Hooks, migration costs are real — this logic is proprietary and will need to be rebuilt on any other platform.

Auth0's breadth is also a genuine advantage for teams with complex requirements: social login, enterprise SSO, MFA, machine-to-machine auth, and CIAM all in a single platform, without stitching together multiple vendors.

If your MAU is modest (verify current free tier limits with Auth0 directly) and you are not experiencing pricing pressure, the switching cost rarely makes sense.

## When to switch to an alternative

**MAU pricing pressure.** Auth0's pricing can become a meaningful line item as user bases scale. If your cost per MAU feels disproportionate relative to the value you're extracting, benchmark alternatives.

**Post-acquisition uncertainty.** Some Auth0 customers have been cautious about Okta's long-term product consolidation strategy. If roadmap alignment is a concern, evaluating independent alternatives is reasonable.

**Developer experience friction.** Auth0's Rules/Actions system, while powerful, is widely noted as having a steep learning curve. Teams that want a more intuitive, modern DX often find Clerk or Stytch more productive.

**Specific use case fit.** If you primarily need enterprise SSO for B2B SaaS customers, WorkOS may be faster and cheaper. If you primarily need passwordless auth and passkeys for a consumer app, Stytch may be better optimized. Auth0 is a generalist platform; specialists sometimes win for specific use cases.

**Self-hosting requirements.** Auth0 is SaaS-only. Organizations that must self-host have no path with Auth0 and should evaluate Keycloak, Zitadel, or FusionAuth.

## Best for enterprise

### Okta Customer Identity (Auth0)

It is worth noting that for large enterprises that need the full breadth of CIAM — social login, enterprise SSO, MFA, attack protection, bot detection, and API security — Auth0 itself (as a standalone product within Okta) remains competitive. The enterprise tier unlocks custom domains, advanced rate limiting, SLA guarantees, and dedicated support. Verify current enterprise pricing directly with Okta/Auth0.

### Zitadel (Enterprise)

Zitadel's enterprise offering provides multi-tenancy, custom domains, advanced role management, and the option for self-hosted or private cloud deployment. For enterprises with data residency requirements or a preference for open source infrastructure, Zitadel is a credible, production-ready alternative. Its OIDC and SAML support is standards-compliant and its administrative interface is modern.

### FusionAuth

FusionAuth offers flexible deployment (self-hosted, private cloud, or FusionAuth Cloud) and a comprehensive feature set including SSO, MFA, OAuth 2.0, SAML, SCIM, and advanced user management. It is commonly chosen by enterprises that want the control of self-hosting without building identity infrastructure from scratch. FusionAuth has a strong community edition and commercial tiers with support. Verify current pricing with vendor.

## Best for startups and smaller teams

### Clerk

Clerk has become a popular choice among developers building modern web applications, particularly in the Next.js and React ecosystem. Its pre-built UI components (sign-in, sign-up, user profile, organization management) are polished and highly customizable. It handles sessions, JWTs, and multi-session management in ways that feel native to modern web frameworks. Its free tier is generous for early-stage products; verify current limits with Clerk.

### Stytch

Stytch is optimized for teams that want passwordless authentication — magic links, OTPs, passkeys, and biometrics — as a first-class experience rather than an add-on. Its API is clean and developer-friendly, and it offers both hosted and headless (bring-your-own-UI) approaches. For consumer apps where reducing login friction is a priority, Stytch is worth a close look.

### Firebase Authentication

For teams already building on Google Cloud or building mobile-first applications, Firebase Authentication is the path of least resistance. It is free up to generous limits (verify with Google), integrates tightly with Firestore and other Firebase services, and handles social login, email/password, phone auth, and anonymous auth with minimal setup. Its enterprise and compliance story is weaker than dedicated CIAM platforms, so evaluate carefully for regulated use cases.

## Best developer-first option

**Clerk** is the strongest developer-first Auth0 alternative for teams building modern web applications. Its React/Next.js components, comprehensive hooks API, excellent documentation, and active community have made it a go-to for product teams that value speed of integration and a polished out-of-the-box user experience. The organization management features (multi-tenancy, role-based access) make it particularly suitable for B2B SaaS products. Verify current SDK support and feature availability at clerk.com.

## Best open source option

**Zitadel** is the recommended open source Auth0 alternative for teams that want a modern, cloud-native, self-hostable CIAM platform. It is written in Go, designed for Kubernetes, and supports OIDC, SAML, and OAuth 2.0 natively. Multi-tenancy is a first-class concept (useful for B2B SaaS), and the administrative console is clean and well-designed. The hosted cloud tier is generous for development and small production workloads.

**Keycloak** remains the most battle-tested open source option and is the right choice for organizations that need maximum protocol support, a large community, and a proven track record at enterprise scale. It is more operationally complex than Zitadel but has been production-proven in demanding environments.

## Related categories

-   [Okta alternatives](/alternatives/okta) — if your need is workforce identity rather than CIAM
-   [WorkOS alternatives](/alternatives/workos) — for B2B SaaS enterprise SSO specifically
-   [Clerk alternatives](/alternatives/clerk) — modern CIAM for web app developers
-   [Stytch alternatives](/alternatives/stytch) — passwordless and B2C authentication
-   [Best open source identity tools](/compare/best-open-source-identity-tools) — self-hosted CIAM and IAM platforms
-   [Best IAM tools for startups](/compare/best-iam-tools-for-startups) — cost-effective identity for early-stage companies

## Related resources

-   **CIAM platform evaluation checklist** — criteria for assessing customer identity platforms across DX, security, compliance, and scale
-   **Auth0 migration guide** — considerations for moving user bases off Auth0 to an alternative platform
-   **MAU pricing comparison worksheet** — model Auth0 vs. alternatives at your current and projected user scale
-   **Passwordless authentication guide** — when and how to implement passwordless for consumer products
-   **B2B SaaS enterprise SSO implementation guide** — adding SAML, SCIM, and audit logs to your product

## Ready to evaluate your options?

IDSync helps engineering and identity teams cut through vendor noise and make confident platform decisions. Explore our full CIAM comparison library, download our evaluation templates, or subscribe to our newsletter for updates when vendor capabilities and pricing change.

[Explore all CIAM platform comparisons →](/compare)

## Related categories

[Customer Identity / CIAM](/directory/category/ciam)[SSO](/directory/category/sso)[Developer Authentication](/directory/category/developer-auth)

### Related buyer resources

[

IAM RFP Template

Template

](/resources/iam-rfp-template)[

SSO Migration Checklist

Checklist

](/resources/sso-migration-checklist)

### Further reading

[

The State of AI Agent Identity 2026

Our flagship research report — market map, 28 vendor profiles, the M&A consolidation ledger, and 12-month predictions.

](/reports/state-of-ai-agent-identity-2026)

## Related vendors

[

Auth0

Auth0 is a developer-centric customer identity and access management (CIAM) platform offering authentication, authorization, and user management for web and mobile applications, now operating as Okta Customer Identity Cloud.

](/directory/auth0)[

WorkOS

WorkOS provides a developer API for adding enterprise identity features — SSO, SCIM directory sync, audit logs, and admin portals — to B2B SaaS applications, enabling faster enterprise sales readiness.

](/directory/workos)[

Frontegg

Frontegg provides a full user management and authentication platform for B2B SaaS companies, including enterprise SSO, multi-tenancy, RBAC, audit logs, and self-service admin portals for end customers.

](/directory/frontegg)[

Clerk

Clerk provides drop-in authentication UI components and a complete user management platform for React, Next.js, and modern web applications, including B2B organization management and enterprise SSO.

](/directory/clerk)[

Stytch

Stytch is an API-first authentication platform offering passwordless authentication (magic links, OTPs, passkeys), session management, and B2B organization management with a clean, headless developer experience.

](/directory/stytch)[

Keycloak

Keycloak is the most widely deployed open source IAM platform, providing enterprise-grade SSO, MFA, SAML, OIDC, LDAP, and Kerberos support in a self-hosted, Apache 2.0 licensed package maintained by Red Hat.

](/directory/keycloak)

IDSync provides educational buyer guidance based on publicly available information, editorial review, and user-submitted data. Vendor information should be verified before purchase. [Who we are, our methodology & disclosure policy](/about).

Rankings are based on category fit, use case, publicly available information, and editorial review. Sponsored placements are clearly labeled.

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