Alternatives to Auth0: 12 Authentication Platforms Developers Actually Ship With
Text
About Auth0
Founded
2013
USA
Ships to
Worldwide
Editor-reviewed
Every recommendation read and refined by hand
Honest tradeoffs
Drawbacks listed, not hidden
No paid placements
Brands cannot pay to be ranked
Auth0 is still the most polished identity platform a developer can bolt onto an app in an afternoon — and it is also the one most likely to blindside your CFO at renewal. That tension is the whole story now.
The product earned its reputation honestly. Universal Login that you could actually theme, Rules and later Actions for custom logic, Lock drop-in widgets, a dashboard where setting up Google and GitHub social connections took minutes, and SDKs for every framework that just worked. For years it was the thing you reached for precisely so you'd never have to think about OAuth token refresh or SAML quirks again.
Then Okta bought it, and the pricing got hungry. The free tier shrank, the jump from free to the first paid plan became a cliff, and MAU-based billing plus feature-gated tiers meant teams found enterprise SSO and advanced MFA locked behind quotes-only plans right when they needed them. The complaint is rarely about the engineering — it's that scaling users now scales your bill in ways that feel punitive.
What follows are the platforms developers are quietly migrating to when the Auth0 invoice stops making sense.
The product earned its reputation honestly. Universal Login that you could actually theme, Rules and later Actions for custom logic, Lock drop-in widgets, a dashboard where setting up Google and GitHub social connections took minutes, and SDKs for every framework that just worked. For years it was the thing you reached for precisely so you'd never have to think about OAuth token refresh or SAML quirks again.
Then Okta bought it, and the pricing got hungry. The free tier shrank, the jump from free to the first paid plan became a cliff, and MAU-based billing plus feature-gated tiers meant teams found enterprise SSO and advanced MFA locked behind quotes-only plans right when they needed them. The complaint is rarely about the engineering — it's that scaling users now scales your bill in ways that feel punitive.
What follows are the platforms developers are quietly migrating to when the Auth0 invoice stops making sense.
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The 12 Best Alternatives to Auth0
1
Clerk
Est. 2020
San Francisco, USA
≈
similar
React, Next.js, and Remix teams who want polished prebuilt UI components, not just APIs
Clerk is the closest spiritual successor to what early Auth0 felt like — drop-in React components, prebuilt sign-in flows, and user management that works out of the box with far less config.
Pros
- Best-in-class prebuilt UI components for React/Next.js
- Generous free tier up to 10,000 MAU
- Organizations, roles, and multi-tenancy built in
Cons
- Pricing climbs fast on MAU past the free tier
- Most opinionated toward the React ecosystem
2
Supabase Auth
Est. 2020
Singapore
$
cheaper
Teams already using Postgres who want auth bundled with their database
Transparent Pricing
Supabase Auth gives you social login, magic links, and MFA with row-level-security integration, and it's free up to a very high user count — a direct answer to Auth0's MAU billing.
Pros
- Open source and self-hostable
- Auth bundled with Postgres, storage, and realtime
- Very generous free tier, no per-MAU surprise
Cons
- Tightly coupled to the Supabase stack
- Fewer enterprise SSO features than Auth0
3
Firebase Authentication
Est. 2011
Mountain View, USA
$
cheaper
Mobile-first teams and MVPs that want the cheapest path to working login
Firebase Auth covers the same social login, email/password, and phone auth ground with a famously forgiving free tier, backed by Google's infrastructure.
Pros
- Extremely generous free tier
- Deep integration with the Google/Firebase ecosystem
- Strong mobile SDKs for iOS and Android
Cons
- Limited customization of hosted UI
- Vendor lock-in to Google Cloud
4
Stytch
Est. 2020
San Francisco, USA
≈
similar
Teams building passwordless-first or fraud-sensitive consumer apps
Stytch is API-first authentication built by ex-Plaid people, leaning hard into passwordless, passkeys, and fraud prevention as a modern Auth0 replacement.
Pros
- Strong passwordless and passkey support
- Built-in device fingerprinting and fraud tooling
- Clean, developer-friendly APIs
Cons
- Fewer prebuilt UI components than Clerk
- B2B SSO features gated to higher tiers
5
WorkOS
Est. 2018
San Francisco, USA
$
cheaper
B2B SaaS teams who need enterprise SSO without enterprise-sales pricing
Transparent Pricing
WorkOS specializes in exactly the enterprise features Auth0 locks behind quotes — SSO, SCIM directory sync, and audit logs — with transparent per-connection pricing.
Pros
- Free for up to 1 million users on AuthKit
- Flat per-connection enterprise SSO pricing
- SCIM, directory sync, and audit logs built for B2B
Cons
- Consumer social login less of a focus
- Enterprise connections billed per org can add up
6
FusionAuth
Est. 2018
Denver, USA
$
cheaper
Teams with compliance needs who want to self-host identity on their own infra
FusionAuth offers the full Auth0 feature set — MFA, social, SAML, user management — but you can self-host the community edition free with no MAU tax.
Pros
- Free self-hosted community edition
- Full feature parity with Auth0 on identity
- Predictable flat hosting pricing, no MAU penalty
Cons
- You own the ops burden when self-hosting
- UI and docs less slick than hosted rivals
7
Keycloak
Est. 2014
Raleigh, USA
$
cheaper
Infra-heavy teams who want zero per-user cost and full control
Transparent Pricing
Keycloak is the open-source identity server that enterprises run when they refuse per-user SaaS billing — OIDC, SAML, SSO, and MFA, all free and self-hosted.
Pros
- Completely free and open source (CNCF project)
- No per-user or MAU billing ever
- Mature OIDC and SAML support
Cons
- Steep setup and maintenance learning curve
- No hosted first-party cloud; you run it yourself
8
Ory
Est. 2017
Munich, Germany
$
cheaper
Engineering teams who want open-source auth with an optional managed layer
Transparent Pricing
Ory is a modern open-source identity stack (Kratos for auth, Hydra for OAuth) with a hosted Ory Network option for teams wanting Auth0's convenience without the lock-in.
Pros
- Fully open source with a hosted Ory Network tier
- Composable: pick auth, OAuth, or permissions separately
- Strong standards compliance and security posture
Cons
- More assembly required than a monolithic platform
- Hosted pricing can scale with active identities
9
SuperTokens
Est. 2019
San Francisco, USA
$
cheaper
Cost-sensitive teams who want open-source auth without running Keycloak
Transparent Pricing
SuperTokens is open-source auth you can self-host free or run managed, covering sessions, social login, and passwordless as a lean Auth0 alternative.
Pros
- Free self-hosted core with no user limits
- Simpler to run than Keycloak
- Managed tier free up to 5,000 MAU
Cons
- Smaller ecosystem and integration library
- Enterprise features still maturing
10
Frontegg
Est. 2019
Tel Aviv, Israel
≈
similar
B2B SaaS teams who want user management UI plus auth in one package
Frontegg bundles auth with a full self-service admin portal — SSO, MFA, roles, and subscription management — aimed squarely at B2B SaaS like a richer Auth0.
Pros
- Full self-service admin and tenant portal
- Strong B2B multi-tenancy out of the box
- Prebuilt admin UI saves significant build time
Cons
- Overkill for simple consumer apps
- Pricing geared toward funded B2B teams
11
Amazon Cognito
Est. 2014
Seattle, USA
$
cheaper
AWS-native teams who want auth billed inside their existing cloud account
Cognito delivers user pools, social and SAML federation, and MFA with pay-as-you-go AWS pricing — the default for teams already deep in AWS.
Pros
- Pay-as-you-go pricing within AWS
- Deep IAM and AWS service integration
- Scales to massive user pools reliably
Cons
- Notoriously clunky developer experience
- Customization and docs are frustrating
12
Logto
Est. 2021
Singapore
$
cheaper
Startups wanting a modern open-source Auth0 with a polished console
Transparent Pricing
Logto is a newer open-source identity platform with a clean admin console, social login, and multi-tenancy — Auth0's convenience with self-host freedom and transparent pricing.
Pros
- Open source with a genuinely clean admin UI
- Generous free tier and self-host option
- Multi-tenant and organizations supported
Cons
- Younger project, smaller community
- Fewer enterprise integrations than incumbents
Cut the MAU bill: cheapest ways off Auth0
The single biggest reason teams leave is per-user billing that scales faster than revenue. Supabase Auth, Firebase Authentication, and Amazon Cognito all bundle auth into a broader platform you may already pay for, so login stops being a separate line item. If you'd rather own the infrastructure entirely, Keycloak, FusionAuth, and SuperTokens let you self-host with no MAU tax at all — you trade a monthly invoice for some ops work.
Enterprise SSO without the quotes-only wall
Auth0 gates SAML, SCIM, and advanced MFA behind enterprise plans that require a sales call. WorkOS exists specifically to fix this — flat per-connection SSO pricing and free AuthKit up to a million users. Frontegg adds a full self-service admin portal for B2B tenants, and Ory gives you standards-compliant OAuth and SSO you can host yourself. These are the picks when you're losing deals because SSO costs more than the deal is worth.
Prebuilt UI vs. pure API control
Some teams loved Auth0 for drop-in Universal Login; others only wanted the APIs. If you want polished components, Clerk is the gold standard for React and Next.js, and Logto offers a clean console with ready-made flows. If you'd rather wire everything yourself for passwordless or fraud-sensitive apps, Stytch and Ory are API-first by design.Which Alternative Is Right for You?
Pick based on why Auth0 stopped working for you. If the invoice is the problem and you're already on Postgres or AWS, Supabase Auth or Amazon Cognito fold auth into infrastructure you pay for anyway. If you want zero per-user billing and can run your own servers, Keycloak is the enterprise default and FusionAuth or SuperTokens are gentler to operate. If you're a React or Next.js shop that misses Auth0's slick drop-in experience, Clerk is the obvious upgrade. If you're losing B2B deals to SSO paywalls, WorkOS is purpose-built for exactly that, with Frontegg close behind for teams wanting the admin portal too. And if passwordless and passkeys are your future, Stytch leads there. Frequently Asked Questions
QWhy did Auth0 get more expensive after the Okta acquisition?
Okta restructured Auth0's pricing around monthly active users and moved more enterprise features — like advanced MFA, SAML, and organizations — into higher, often quotes-only tiers. The free-to-paid jump also became a cliff, so teams that outgrew the free tier faced sharp bill increases. The engineering didn't get worse; the billing got more aggressive, which is what sends most people looking elsewhere.
QWhat is the cheapest Auth0 alternative for a growing startup?
If you can self-host, Keycloak, FusionAuth, and SuperTokens have no per-user cost at all. If you want managed, Supabase Auth and Firebase Authentication have very generous free tiers, and WorkOS AuthKit is free up to a million users. The right pick depends on whether you'd rather pay with money or ops time.
QWhich Auth0 alternative is best for a Next.js or React app?
Clerk is the strongest fit — its prebuilt React and Next.js components, hosted and embedded sign-in, and built-in organizations get you further than Auth0's SDKs with less wiring. Logto and Stytch are solid runners-up if you want open source or passwordless-first flows respectively.
QCan I move off Auth0 without losing enterprise SSO and SAML?
Yes, and you'll likely pay less. WorkOS specializes in SSO, SCIM directory sync, and audit logs with flat per-connection pricing. Keycloak and Ory support SAML and OIDC self-hosted for free, and Frontegg bundles SSO with a B2B admin portal. All of them avoid Auth0's quotes-only enterprise wall.
QIs it worth self-hosting authentication instead of using a managed service like Auth0?
Self-hosting with Keycloak, FusionAuth, or Ory kills per-user billing entirely, which matters a lot at scale — but you take on patching, uptime, and security responsibility for a system you really don't want breaking. For small teams without ops bandwidth, a managed option like Clerk, Supabase, or WorkOS is usually safer. Self-host when the MAU savings clearly exceed the engineering time.
Our Verdict
The Best Auth0 Alternative For You
Pick based on why Auth0 stopped working for you. If the invoice is the problem and you're already on Postgres or AWS, Supabase Auth or Amazon Cognito fold auth into infrastructure you pay for anyway. If you want zero per-user billing and can run your own servers, Keycloak is the enterprise default and FusionAuth or SuperTokens are gentler to operate. If you're a React or Next.js shop that misses Auth0's slick drop-in experience, Clerk is the obvious upgrade. If you're losing B2B deals to SSO paywalls, WorkOS is purpose-built for exactly that, with Frontegg close behind for teams wanting the admin portal too. And if passwordless and passkeys are your future, Stytch leads there.