Head to head
Auth0 vs Firebase Authentication
Both platforms are scored with the same methodology and the same category rubric. Nothing on this page is influenced by advertising.
56/100Higher score | 45/100 | |
|---|---|---|
| Category rank | #1 | #7 |
| Confidence | Medium confidence | High confidence |
| External Reputation | 70 | 80 |
| AI Authority | 55 | 11 |
| Web Authority | 31 | 21 |
| Expert Assessment | 62 | 65 |
| TOP10 User Score | — | — |
| Pricing | From $35/month (B2C Essentials at 500 MAUs); B2B Essentials starts at $150/month at 500 MAUs · free tier: $0/month for up to 25,000 MAUs (B2C and B2B), 1 custom domain (card verification), passwordless, unlimited social connections, 5 Organizations, 1 Enterprise Connection, self-service SSO and SCIM, community support; no credit card to sign up | $0.0055 per MAU/month above 50,000 Tier 1 MAUs (Blaze plan, pay-as-you-go) · free tier: Spark plan: no payment method required; other authentication services (email, social, anonymous) included at no cost; Phone Auth listed as 'Not applicable'. With Identity Platform: 50,000 MAUs free and 50 SAML/OIDC MAUs free. |
| Pricing model | Subscription (tiered by Monthly Active Users, with add-ons) | Usage-based (two plans: no-cost Spark and pay-as-you-go Blaze) |
| Best for | Development teams under roughly 10,000 MAUs, or B2B SaaS vendors needing Organizations plus a handful of SAML connections who can absorb $150–$2,400/month; also regulated buyers willing to buy at Enterprise for the 99.99% SLA, HIPAA/BAA and FAPI profile. | Consumer-facing mobile or web products with standard email/social/phone sign-in needs, especially teams already committed to Firestore or the wider Firebase/Google Cloud stack, and startups whose user base fits inside the 50,000 free MAU allowance. |
| Avoid if | You run a high-MAU consumer platform (above ~30,000 B2C MAUs pricing is sales-only), you are a cost-sensitive startup on a steep growth curve exposed to the next-tier-up billing rule, you need predictable spend forecasting, or you are a B2C buyer needing enterprise SAML connections below the Enterprise tier. | You sell enterprise SSO (SAML/OIDC billed at $0.015/MAU after 50 free users), need deep customization of login flows or fine-grained authorization, run high-volume SMS auth in expensive regions, require contractual data residency, a published SLA or a named compliance attestation, or have a hard multi-cloud portability mandate. |
| Markets | SMB, Startups, B2B SaaS, Enterprise | Startups, SMB, Mobile and web app developers, Enterprise (via Identity Platform) |
| Founded | — | — |
| Headquarters | — | — |
A higher TOP SCORE means more of the evidence favours that platform on this methodology — it is not a recommendation, and it does not account for your specific requirements. Advertisers are never declared the winner of a comparison.