Comparison hub / Best Firebase Auth Alternatives in 2026
Best Firebase Auth Alternatives in 2026
Firebase Authentication is one of the best free auth tiers in the market. Teams outgrow it not because Firebase fails, but because they cross a line: multi-cloud requirements, passwordless methods Firebase does not ship, or SMS pricing that has become unpredictable.
Editorial disclosure
This roundup is published by MojoAuth. MojoAuth appears in the list. We rank ourselves where the methodology puts us, alongside every other entry. See the full disclosure for how the ranking works.
TL;DR shortlist
Ranked by overall fit for teams currently using Firebase Auth. Specific use cases may shuffle the order.
| # | Alternative | Best for | Pricing |
|---|---|---|---|
| 1 | MojoAuth | Consumer apps wanting passwordless-first login, transparent MAU pricing, and deployment in hours, not months. | Free: 25,000 MAU, no credit card. Business Pro from $120/mo for 25,000 MAU. Enterprise: custom. |
| 2 | SSOJet | Teams outgrowing Firebase Auth that need enterprise SAML SSO and SCIM provisioning without moving to a heavyweight IAM. | Flat, connection-based pricing from $99/mo for 2 enterprise SSO connections; no per-MAU charges. |
| 3 | Clerk | React or Next.js consumer apps wanting polished UI without custom build. | Pro from $25/mo + $0.02/MAU. |
| 4 | Supabase Auth | Teams already evaluating Supabase as a Firebase alternative for the full stack. | Free tier; Pro $25/mo. |
| 5 | Auth0 (Okta CIC) | Teams where Firebase's lack of SSO is the gating constraint. | B2C Essentials from $35/mo for 1,000 MAUs. |
| 6 | AWS Cognito | Teams moving from GCP to AWS who want platform-native identity. | Free under 50,000 MAUs. Per-MAU + add-ons after. |
| 7 | SuperTokens | Teams that need data residency outside GCP. | Self-host free. Managed $0.02/MAU after 5,000. |
| 8 | Stytch | Teams already using Twilio Voice/SMS as a strategic vendor. | Per-MAU after free tier; B2B add-ons. |
Why teams leave Firebase Auth
The most common reasons real teams cite, drawn from G2 reviews, Reddit threads, HN discussions, and the editorial team's customer conversations.
- Need passkeys, WhatsApp OTP, or One Tap without building them on top of Firebase
- Cloud strategy includes AWS or Azure and Firebase Auth is GCP-only
- Phone-auth SMS costs have become unpredictable in international markets
- Want predictable MAU pricing instead of per-SMS costs
The alternatives, ranked
#1MojoAuth
Full comparison →Passwordless authentication for consumer apps: passkeys, magic links, email/SMS OTP (WhatsApp OTP on Enterprise), social login, and One Tap behind one API, with MAU-based pricing.
Best for. Consumer apps wanting passwordless-first login, transparent MAU pricing, and deployment in hours, not months.
Strengths
- Free for 25,000 MAU; Business Pro from $120/mo, MAU-based
- FIDO2/WebAuthn compliant passkeys; native WhatsApp OTP on Enterprise
- SDKs in 22+ languages; deploy in hours, not months
- SOC 2 Type II and ISO 27001 certified; HIPAA-ready (BAA on Enterprise)
Limitations
- FedRAMP authorization is on the roadmap, not yet available
- Marketplace breadth is smaller than Okta/Auth0
- Visual flow builder is not part of the product (webhooks instead)
Pricing. Free: 25,000 MAU, no credit card. Business Pro from $120/mo for 25,000 MAU. Enterprise: custom.
#2SSOJet
Full comparison →Developer-first enterprise authentication platform with SAML/OIDC SSO, SCIM, passwordless, and MFA.
Best for. Teams outgrowing Firebase Auth that need enterprise SAML SSO and SCIM provisioning without moving to a heavyweight IAM.
Strengths
- Enterprise SAML & OIDC SSO
- SCIM user provisioning
- Passwordless authentication & passkeys
- Developer-friendly APIs & SDKs
- Multi-tenant organization support
Limitations
- Smaller integration ecosystem than legacy IAM vendors
- Focused primarily on B2B SaaS authentication
- Enterprise marketplace and partner ecosystem is still growing
Pricing. Flat, connection-based pricing from $99/mo for 2 enterprise SSO connections; no per-MAU charges.
#3Clerk
Full comparison →Modern drop-in auth components for React-heavy stacks.
Best for. React or Next.js consumer apps wanting polished UI without custom build.
Strengths
- Free 10k MAUs
- React components
- Fast setup
Limitations
- Limited mobile SDK reach versus Firebase
- SSO per-org add-on
- Smaller free tier than Firebase
Pricing. Pro from $25/mo + $0.02/MAU.
#4Supabase Auth
Open source Firebase alternative; Supabase Auth is the auth slice.
Best for. Teams already evaluating Supabase as a Firebase alternative for the full stack.
Strengths
- Open source
- Row-Level Security tied to JWT
- Generous free tier
Limitations
- Smaller ecosystem than Firebase
- Self-host has the same operations cost as SuperTokens
- Less mature CIAM features
Pricing. Free tier; Pro $25/mo.
#5Auth0 (Okta CIC)
Full comparison →Mature enterprise CIAM. Higher price, broader ecosystem.
Best for. Teams where Firebase's lack of SSO is the gating constraint.
Strengths
- Largest Marketplace
- Mature B2B Organizations
- FedRAMP Moderate
Limitations
- Pricing escalates with add-ons
- Complex pricing model
- Heavier setup than Firebase
Pricing. B2C Essentials from $35/mo for 1,000 MAUs.
#6AWS Cognito
Full comparison →AWS-native CIAM. Cheap, but configuration-heavy.
Best for. Teams moving from GCP to AWS who want platform-native identity.
Strengths
- Per-MAU pricing competitive at scale
- Direct AWS service integration
- AWS-wide compliance
Limitations
- AWS lock-in (mirror of Firebase's GCP lock-in)
- Slow to ship against
- Per-operation pricing complexity
Pricing. Free under 50,000 MAUs. Per-MAU + add-ons after.
#7SuperTokens
Full comparison →Open source self-hostable alternative.
Best for. Teams that need data residency outside GCP.
Strengths
- Apache 2.0 license
- Self-host or managed
- Source-level customization
Limitations
- Operations cost for self-host
- Smaller community than Firebase
- Newer managed service
Pricing. Self-host free. Managed $0.02/MAU after 5,000.
#8Stytch
Full comparison →Passwordless-native CIAM, now part of Twilio.
Best for. Teams already using Twilio Voice/SMS as a strategic vendor.
Strengths
- Mature B2B and B2C SDKs
- Twilio number intelligence integration
- Strong passkey support
Limitations
- Tighter coupling with Twilio post-acquisition
- Mixed identity + comms billing
- Identity-only buyers may prefer pure-play
Pricing. Per-MAU after free tier; B2B add-ons.
Want a deeper Firebase Auth comparison?
We maintain a dedicated head-to-head for MojoAuth vs Firebase Auth with pricing math, code samples, and migration plans.
How this list is built
Rankings reflect overall fit for teams currently using Firebase Auth, weighted for pricing transparency, developer experience, ecosystem, and the specific reasons teams leave the parent vendor. See the methodology for sourcing rules and refresh cadence (quarterly minimum). Spotted an error or want us to add a vendor? editorial@mojoauth.com.
Advocates for frictionless passwordless authentication and connects product outcomes to real buyer decisions in CIAM.
Builds developer-friendly passwordless authentication systems and reviews SDK ergonomics across vendors.