Firebase Auth Alternative: Go from B2C to B2B with Logto
Firebase Auth alternative: For apps going from B2C to B2B
Looking for a Firebase Auth alternative? Logto helps you add enterprise SSO, multi-tenant organizations, and role-based access control without rebuilding your identity layer from scratch.
Why teams look for Firebase Auth alternatives
Firebase Auth is fantastic for launching a weekend project or a simple B2C mobile app: it's fast, well documented, and tightly integrated with the Google ecosystem. But when we talk to teams migrating away, the story is almost always about hitting a wall when their business model matures.
| Motivation | What it looks like in practice |
|---|---|
| The B2B feature gap | As your app targets larger clients, they demand enterprise SSO (SAML/OIDC), role-based access control, and organization-level management. Firebase Auth lacks native RBAC and organization management, even with the Identity Platform upgrade, so you end up building workarounds in Firestore. |
| Data residency and compliance | For teams serving European clients, data residency is critical. Firebase Auth stores user data exclusively in the US, which can create significant GDPR compliance hurdles. |
| The split architecture | Teams often end up running Firebase Auth for B2C users, a second provider for B2B organizations, and sometimes a third product just for enterprise SSO. Each platform brings its own user store, SDK, and session logic. The whole setup gets harder to keep in sync with every release. |
| Ecosystem lock-in | Firebase Auth is deeply coupled with Google Cloud and Firestore. If you ever need to migrate your database or backend, untangling the authentication layer becomes a serious engineering project. |
How is Logto different from Firebase Auth?
Native B2B capabilities
Logto includes first-class support for multi-tenant organizations. Model complex B2B hierarchies, assign organization-level roles, and enforce enterprise SSO policies without writing custom database logic.
Global data residency
Unlike Firebase Auth's US-only storage, Logto Cloud runs in the EU, US, Australia, and Japan, with new public regions added as demand grows. Need a specific location? Logto Private Cloud gives you a dedicated instance in the region of your choice. You can also self-host on your own infrastructure.
Open standards, no lock-in
Logto is built on OAuth 2.1, OIDC, and SAML, and doesn't tie your identity layer to a specific database or cloud. The open-source core means you can always take authentication in-house.
Is Logto the right Firebase Auth alternative for you?
We believe in honest positioning. Logto isn't the perfect fit for every Firebase Auth customer.
When you should switch to Logto
- You are moving upmarket. Enterprise clients expect SAML SSO, organization management, and RBAC. Logto ships all of them out of the box.
- You need EU data residency. Logto's EU region, private cloud, or self-hosted deployment solves GDPR data residency immediately.
- You want to unify B2C and B2B. Tired of maintaining two separate authentication systems for different user types? Logto handles both gracefully.
- You run more than one app. Firebase auth state lives inside each app, and web sessions stick to a single domain. Logto gives every app you register, web or native, one central sign-in session.
When Firebase Auth might be a better fit
- You are building a simple B2C app on Google Cloud. If your app is built around Firestore, Cloud Functions, and Firebase Hosting, the native integration of Firebase Auth is hard to beat.
- You have zero B2B requirements. If you never plan to offer multi-tenancy or enterprise login and your app is built entirely around the Firebase console, switching may not be worth the effort. For what it's worth, Logto's free plan matches the 50K MAU allowance.
Firebase Auth vs. Logto: Head-to-head comparison
| Logto | Firebase Auth | |
|---|---|---|
| B2B and enterprise readiness | ||
| Target audience | B2C, B2B, and multi-tenant SaaS | Primarily B2C |
| Enterprise SSO | $48 | Requires Identity Platform upgrade |
| Multi-tenant organizations | Unlimited* $48 Organizations add-on | Multi-tenancy requires Identity Platform no organization roles |
| Role-based access control | Unlimited* $32 Global RBAC add-on | Manual implementation in Firestore |
| Multi-factor authentication | $48 All factors | SMS only requires Identity Platform |
| Multi-app single sign-on | Central session shared by every registered app | Per-app client state keychain sharing on Apple platforms only |
| Machine-to-machine auth | 1 included $8 each extra | - |
| Platform and deployment | ||
| Data residency | EU, US, AU, and JP regions private cloud or self-hosting anywhere | US only |
| Compliance | SOC 2 Type II HIPAA/BAA available on Enterprise | SOC 1/2/3 HIPAA BAA only via Identity Platform |
| Open source | Open-source core 13k+ GitHub stars | Proprietary Google service |
| Self-hosting | ✓ | - |
| Free tier | Up to 50K MAU and 50K tokens | Up to 50K MAU (Spark plan) |
| Pricing model | Token-based pay for actual auth activity | MAU-based with Identity Platform |
Based on publicly available information as of July 2026. Please verify with the respective vendor for the latest details.
* "Unlimited" refers to features without a fixed limit, but is subject to system policies to ensure fair usage, security, and optimal performance.
Migrating from Firebase: Handling the scrypt challenge
Migrating from Firebase Auth is notoriously tricky because Firebase stores passwords with a customized version of the scrypt hashing algorithm.
Migration is still entirely possible. Logto supports bulk-importing users via the Management API with a wide range of standard hash algorithms, and users signing in through social or passwordless methods migrate cleanly with no extra work.
For password users, Logto imports Firebase's modified scrypt hashes directly. Export your users from Firebase and import them with your project's password hash parameters through the Management API. Users with a scrypt hash in the export keep their current password, no mass password reset needed.
Read the user migration guide →
Every migration is a little different. If the guide doesn't cover your case, talk to us and tell us what you need.
Frequently asked questions
What is the best Firebase Auth alternative?
If you are staying entirely within the Google ecosystem for a simple B2C app, you may not need an alternative at all. But if you are building a B2B SaaS, need EU data residency, or want the freedom to self-host, Logto is a strong choice. Depending on your needs, Supabase Auth and WorkOS are also worth evaluating.
Does Firebase Auth support SAML or enterprise SSO?
Not in its base version. You must upgrade to Firebase Auth with Identity Platform to access SAML and multi-tenancy, which changes the pricing structure and still lacks native RBAC and organization management.
Where does Firebase Auth store user data?
As of July 2026, Firebase Auth stores user data exclusively in the United States. If you require EU data residency for GDPR compliance, consider an alternative like Logto that offers EU cloud regions or self-hosting.
Can I self-host Firebase Auth?
No. Firebase Auth is a proprietary managed service tightly coupled with Google Cloud. Logto, by contrast, is open-source and can be self-hosted on any infrastructure.