Head to head
Auth0 vs Supabase Auth
As a authentication & identity API, Auth0 rates higher on the APIbenchmarks Index, 91.7 to 82.2, a 9.5-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Auth0 | Supabase Auth |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 91.7 | 82.2 |
Specifications
| Auth0 | Supabase Auth | |
|---|---|---|
| Best for | Full-featured CIAM for B2C and B2B | Postgres-native auth in an OSS BaaS |
| Free tier | 25k MAU (free plan) | 50k MAU (Free plan) |
| Pricing | MAU-based | MAU-based (+ platform fee) |
| Official SDKs | 12 languages | 6 languages |
Is Auth0 better than Supabase Auth?
On the APIbenchmarks Index, Auth0 rates higher (91.7 vs 82.2). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
Auth0 leads by 9.5 points (91.7 vs 82.2) and wins 3 of 4 criteria; Supabase Auth wins 1.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 93 | 84 | |
| Reliability | 92 | 76 | |
| Ecosystem & SDKs | 95 | 80 | |
| Accessibility | 85 | 90 |
Choose Auth0 if… / choose Supabase Auth if…
- →documentation & dx matters most to you (93 vs 84)
- →reliability matters most to you (92 vs 76)
- →ecosystem & sdks matters most to you (95 vs 80)
- →you need broad SDK coverage (12 official SDKs vs 6)
- →your use case matches its focus: full-featured ciam for b2c and b2b
- →accessibility matters most to you (90 vs 85)
- →your use case matches its focus: postgres-native auth in an oss baas
Pricing side by side
- Model
- MAU-based
- Free tier
- 25k MAU (free plan)
- Free$0
- B2C Essentialsfrom $35-$70/mo (500 MAU)
- B2B Essentialsfrom $150/mo (500 MAU)
- B2C Professionalfrom $240/mo (1,000 MAU)
- B2B Professionalfrom $800/mo (1,000 MAU)
- EnterpriseCustom
- Model
- MAU-based (+ platform fee)
- Free tier
- 50k MAU (Free plan)
- Free$0/mo
- Pro$25/mo
- Team$599/mo
- EnterpriseCustom
Vendor-published pricing, verified 2026-06-27 (Auth0) and 2026-06-27 (Supabase Auth).
SDK and language coverage
Both · 1
Python (FastAPI/Django/Flask)
Only Auth0 · 11
JavaScript / SPA (auth0-spa-js)React (auth0-react)Next.js (nextjs-auth0)AngularVueNode.js (node-auth0)Java / Spring BootSwift / iOSKotlin / AndroidReact NativePHP / Ruby / .NET / Go
Only Supabase Auth · 5
JavaScript / TypeScriptFlutter / DartSwiftKotlinC# (.NET)
Strengths and weaknesses
- +Best-in-class developer experience with 30+ SDKs/Quickstarts covering nearly every major framework
- +Universal Login plus Actions allow MFA, social login, and custom pipeline logic without app code changes
- +Strong standards support (OAuth 2.0, OIDC, SAML) and deep enterprise SSO/identity connections
- –MAU-based pricing with hard caps gets expensive fast at scale; widely called a startup 'growth penalty'
- –Post-Okta pricing changes seen as steep and unpredictable (reports of large bill jumps and a B2C Essentials hike)
- –B2B-critical features (enterprise SSO connections, higher rate limits, custom SLA, private cloud) gated behind custom Enterprise pricing
- +Deep Postgres Row-Level Security integration: JWT claims are usable directly inside SQL policies for DB-layer authorization
- +Very generous free tier (50,000 MAU) and low overage pricing ($0.00325/MAU) versus Auth0/Okta
- +Broad auth methods out of the box: password, magic link, OTP, phone, anonymous, dozens of social OAuth providers, plus TOTP/phone MFA
- –B2C-first: no first-class Organizations model and no SCIM provisioning for B2B tenancy
- –SAML/OIDC support is comparatively immature; SSO gated to Pro and above
- –No adaptive/risk-based MFA or bot-detection capabilities
Auth0 vs Supabase Auth: questions
- Which has better documentation, Auth0 or Supabase Auth?
- Auth0 scores higher on documentation and developer experience: 93 vs 84 out of 100.
- Which is more reliable, Auth0 or Supabase Auth?
- Auth0 scores higher on reliability: 92 vs 76 out of 100.
- Do Auth0 and Supabase Auth have a free tier?
- Auth0: yes (25k MAU (free plan)). Supabase Auth: yes (50k MAU (Free plan)).
- How are Auth0 and Supabase Auth priced?
- Auth0: MAU-based. Supabase Auth: MAU-based (+ platform fee).
- Which has more official SDKs?
- Auth0 lists 12 official SDKs, Supabase Auth lists 6.