Auth0 Alternatives for B2B SaaS (2026): 9 Options Compared

The main Auth0 alternatives for B2B SaaS are Frontegg, WorkOS, Descope, Stytch and Clerk (managed platforms), FusionAuth and Keycloak (self-hosted), and Amazon Cognito and Microsoft Entra External ID (cloud-provider identity).

The right choice usually comes down to three things: what you’re billed for (users, enterprise connections or organizations), who sets up each customer’s SSO and SCIM, and how you’ll move existing users and SSO connections off Auth0.

This is part of a series of articles about Auth0

In this article:

Why B2B teams look for an Auth0 alternative

Auth0 is a capable, widely used identity platform, and plenty of teams should stay on it (see when to stay). The reasons B2B teams start evaluating alternatives are usually about fit, not basic capability:

• The billing shape. Auth0’s B2B plans start at $150/month (Essentials) and $800/month (Professional), each listed “up to 500 monthly active users,” and include a set number of enterprise SSO connections — 3 on Essentials — with more connections as add-ons. A B2B product grows by customer accounts that each want SSO, so connection and tier limits can matter more than user counts.
• Enterprise features vary by tier. Auth0’s Free plan includes 5 Organizations, 1 enterprise connection, Self-Service SSO and SCIM; Enterprise MFA is an add-on on Essentials and included on Professional.
• The customer-admin experience. Your customers’ IT admins need to connect their identity provider, provision users and manage roles. How much of that comes ready-made — versus built by your team on APIs — differs a lot between vendors.
• Vendor consolidation. Some teams re-evaluate after Auth0 became part of Okta. This is a reason teams give, not a claim about Auth0’s product or roadmap.

What actually matters when you replace Auth0 in a B2B product

Seven things decide the right replacement:

1. Unit of charge. Is the bill driven by monthly active users, by each enterprise SSO/SCIM connection, by organizations (tenants), or by plan tier? Model your next 24 months — number of customer accounts, how many need SSO, and active users — not just today.
2. Organization model. Can a user belong to several customer accounts? Can you nest accounts (parent company → subsidiaries) and inherit roles? Are roles and security policies configurable per customer?
3. Enterprise SSO per customer. SAML and OIDC per organization, with domain verification and just-in-time provisioning.
4. SCIM provisioning. Is it included, and is it priced like SSO (per connection)?
5. Customer self-service. Can your customer’s admin configure SSO and SCIM themselves, and then keep managing users, roles, security settings and audit logs inside your app — or only complete a one-time setup flow?
6. Migration from Auth0. Password-hash import, bulk vs gradual (just-in-time) migration, and what changes for each customer’s SAML connection.
7. Hosting and control. Fully managed SaaS, or self-hosted where your team runs upgrades, scaling and security patches.

The 9 Auth0 alternatives at a glance

The options are listed in no particular order. Prices are list prices from official pricing pages on October 1, 2026 (plans change), in USD per month unless noted. “Connection” means one customer’s SSO or SCIM integration. These are starting points, not total cost of ownership.

The alternatives in detail

1. Frontegg

Frontegg is a customer identity platform built for B2B SaaS, centered on organizations (your customers’ accounts) and an embeddable admin portal your customers’ admins use inside your product.

• Consider it if: you sell to companies that expect to manage their own SSO, SCIM, users and roles, and you’d rather not build that admin layer yourself.
• How you’re charged: monthly active users and enterprise connections. Pay as You Go is $0 with 7,500 MAU, unlimited organizations and 5 enterprise connections (SSO/SCIM); Enterprise is custom, with connection add-ons.
• Tenant and admin model: where you enable the SSO module, your customer’s admin configures SAML or OIDC SSO themselves, and the same embedded portal can keep handling users, roles, SCIM and audit logs afterwards (some modules are Enterprise). Parent/child account hierarchies are an Enterprise capability.
• Migrating from Auth0: Frontegg documents two routes. Its “Migrate from Auth0” API imports users from your Auth0 tenant with a single request, mapping each user to a Frontegg account using a tenant field from their Auth0 metadata. Separately, its user-migration API accepts bcrypt password hashes, the format Auth0 provides when you request a hash export from Auth0 support, so those users can keep their passwords. Users whose hashes aren’t imported are prompted to reset their password.
• What you’ll still build: the integration into your app (SDK or hosted login) and any app-specific authorization rules.
• Consider something else if: you only need SSO added to an existing auth stack and don’t want an embedded admin portal.

For a feature-by-feature view, see Frontegg vs Auth0.

2. WorkOS

WorkOS started with enterprise SSO and Directory Sync (SCIM) and added AuthKit for full user management. AuthKit is free up to 1 million users, while SSO and Directory Sync are each priced per connection ($125 per connection for the first 15, lower at higher volume). Its Admin Portal gives your customer’s IT admin a guided setup for SSO, Directory Sync, domain verification and log streams. WorkOS publishes an Auth0 migration guide covering users, organizations, SSO connections and TOTP MFA; password hashes come from an Auth0 support request, which WorkOS notes can take a week or more.

• Good fit: large free user allowance; enterprise SSO/SCIM is the main need.
• Watch: connection costs scale with the number of customers that need SSO and SCIM, since each is priced separately; check whether the Admin Portal and widgets cover the ongoing tenant administration you need.

Side by side with Frontegg: Frontegg vs WorkOS.

3. Descope

Descope combines a drag-and-drop flow editor with B2B tenants and SSO. Its plans bundle limits: Free (7,500 MAU, 10 tenants, 3 SSO connections), Pro from $249/month billed annually (10,000 MAU, 35 tenants, 5 SSO) and Growth from $799/month billed annually (25,000 MAU, 100 tenants, 10 SSO, SCIM). Overages on Pro and Growth are listed per MAU, tenant and SSO connection. Descope documents full or hybrid migration from Auth0, including bulk import and a way to treat freshly migrated users differently in your flows.

• Good fit: teams that want product or security staff to change auth flows visually.
• Watch: SCIM starts at the Growth tier; tenant counts are capped per plan.

Side by side with Frontegg: Frontegg vs Descope.

4. Stytch

Stytch offers a separate B2B product built around organizations, with a free tier of 10,000 monthly active users and five SSO or SCIM connections free before $125 per connection. Its migration guide covers importing user data, including bcrypt password hashes.

• Good fit: developer teams that want APIs and SDKs rather than a hosted admin experience.
• Watch: check which customer-admin screens are prebuilt and which you’ll build.

5. Clerk

Clerk is known for drop-in UI components, especially for React and Next.js. All plans include 50,000 monthly retained users; Organizations are free up to 100 monthly retained organizations per app (up to 20 members each), and a B2B add-on lifts those limits. Pro and Business include one enterprise SSO connection and one SCIM directory per app, then $75/month each. Clerk documents export/import and “trickle” migration; we did not find an Auth0-specific guide.

• Good fit: front-end-heavy teams that want fast, polished sign-in UI.
• Watch: model SSO/SCIM add-on cost if many customers need it.

6. FusionAuth

FusionAuth can be self-hosted (the Community edition is free) or run as a managed deployment. Tenants and SAML are available on all plans; a SCIM server is part of Enterprise. FusionAuth publishes a detailed Auth0 migration guide that imports bcrypt password hashes so users keep their passwords, after you obtain the export from Auth0 support.

• Good fit: teams that need data residency or deployment control.
• Watch: self-hosting moves upgrades, scaling and patching to your team.

Side by side with Frontegg: Frontegg vs FusionAuth.

7. Keycloak

Keycloak is open-source identity and access management under the Apache 2.0 license. It added Organizations in version 26.0 and a SCIM API, which became a preview feature in 26.7 and is listed as supported in the 26.8 release notes — check which version you run.

• Good fit: teams with platform engineers who want full control and no license fee.
• Watch: you run and secure it; B2B self-service for your customers’ admins is something you build.

Side by side with Frontegg: Frontegg vs Keycloak.

8. Amazon Cognito

Cognito is AWS’s managed user directory. Its Lite and Essentials tiers include 10,000 free MAU for direct sign-in, while federated (SAML/OIDC) users get 50 free MAU and are then priced per MAU. AWS documents five patterns for multi-tenant apps — from a user pool per tenant to custom attributes — and notes that quotas are shared across tenants in a pool.

• Good fit: AWS-native teams with straightforward tenancy.
• Watch: enterprise SSO for many customers is billed per federated user, and the B2B layer (tenant admin, roles per tenant) is yours to design.

9. Microsoft Entra External ID

Entra External ID is Microsoft’s customer identity (CIAM) product and the successor to Azure AD B2C, which Microsoft stopped selling to new customers on May 1, 2025. It’s billed per monthly active user, with the first 50,000 MAU free; SMS authentication, machine-to-machine tokens and regional data residency are add-ons. Apps can use OIDC or SAML, and users can sign in with Microsoft Entra ID accounts or custom OIDC identity providers.

• Good fit: teams already invested in Microsoft and Azure, especially with consumer or simple business-customer sign-in.
• Watch: its customer docs don’t describe a per-customer organization model, customer-admin self-service or SCIM for external tenants, so plan how you’d build the B2B layer. (Not to be confused with Azure AD / Entra ID, which is Microsoft’s workforce identity product.)

Side by side with Frontegg: Frontegg vs Entra ID (covers External ID).

Or build it yourself?

Some teams leaving Auth0 consider building authentication in-house. For a B2B product, that usually means building and maintaining more than login: per-customer SAML and OIDC SSO, SCIM provisioning, MFA, roles per customer account, an admin area your customers’ IT teams can use, audit logs, and ongoing security fixes. It can make sense if identity is core to your product and you have a team to own it long term. For a closer look at the trade-offs, see Frontegg vs homegrown authentication.

How to choose: match your situation

Moving off Auth0: what the migration really involves

Whichever platform you choose, plan for these steps. They’re where B2B migrations slip.

1. Get your password hashes early. Auth0 exports password hashes only through a support request, not on the Free plan, and doesn’t guarantee a delivery date. Without hashes, users must reset passwords or you migrate them gradually at their next login.
2. Map organizations and roles. Recreate each Auth0 Organization as a tenant/account in the new system, with memberships and roles. Decide how multi-account users are represented.
3. Plan each customer’s SSO cutover. A SAML connection usually gets a new ACS URL and entity ID on a new platform, so your customer’s IT team typically has to update their identity provider. Schedule it with each customer and keep the old connection working until they switch. OIDC connections need new redirect URIs, and for SCIM each customer updates the SCIM base URL and token in their identity provider.
4. Choose bulk or gradual. Bulk import moves everyone at once; gradual (just-in-time) migration moves users as they log in, which spreads risk — but it typically checks passwords against Auth0 at first login, so your Auth0 tenant has to stay active until each cohort finishes. SSO and social-login users have no password to move; they’re re-linked by email or identity-provider identifier. Many B2B teams migrate cohort by cohort — see our gradual CIAM migration guide.
5. Port custom logic. Auth0 Actions/Rules, token claims and post-login hooks need equivalents on the new platform. Inventory them before you start.
6. Test with a real customer tenant — SSO, SCIM, MFA and API tokens — before moving production cohorts.

When to stay on Auth0

Switching costs engineering time and customer coordination. Staying is often the better call if:

• Your current plan’s price and SSO connection limits still fit your next one to two years.
• You rely heavily on Auth0 Actions, Marketplace integrations or features you’d have to rebuild.
• You have few enterprise customers, so per-customer SSO and admin self-service aren’t driving cost or support load.

Frequently asked questions

What is the best Auth0 alternative for B2B SaaS? It depends on your situation: Frontegg if you want customers’ admins to manage SSO, SCIM and users inside your app; WorkOS or Stytch if you’re adding enterprise SSO/SCIM to auth you already have; FusionAuth or Keycloak if you need to self-host. See How to choose.

What are the main Auth0 competitors, and are there open-source options? For B2B SaaS, the main Auth0 competitors are managed B2B identity platforms (Frontegg, WorkOS, Descope, Stytch and Clerk) and the cloud providers’ own customer identity products (Amazon Cognito and Microsoft Entra External ID). If you want open source or self-hosting, Keycloak is open source under the Apache 2.0 license, and FusionAuth’s Community edition is free to self-host.

Is there a free Auth0 alternative? Several have free tiers on official pricing: Frontegg Pay as You Go (7,500 MAU), WorkOS AuthKit (up to 1M users, SSO priced separately), Descope Free, Stytch B2B (10,000 MAU), Clerk (50,000 MRU), Amazon Cognito (10,000 free direct-sign-in MAU on Lite/Essentials), Microsoft Entra External ID (first 50,000 MAU), and self-hosted FusionAuth Community or Keycloak. Auth0’s own Free plan covers up to 25,000 MAU.

Can I migrate from Auth0 without forcing password resets? Usually yes, if you obtain the password hashes from Auth0 support and the new platform imports Auth0’s bcrypt hashes; otherwise use gradual migration at next login. Confirm the target platform accepts Auth0’s bcrypt format and cost factor.

Do my enterprise customers have to reconfigure SSO when I leave Auth0? Typically yes for SAML, because the service-provider endpoints change. Plan each customer’s cutover.

Evaluating a move off Auth0? Talk to Frontegg — we’ll map your Auth0 organizations, connections and roles to Frontegg and walk through a migration plan.

Related: Frontegg vs Auth0 · Auth0 vs Keycloak · Auth0 vs Cognito · Frontegg vs Entra ID · Gradual CIAM migration · SSO & SCIM