Which is better: Clerk or Supabase Auth or Auth0?

By our score, Clerk (87), Supabase Auth (85), Auth0 (70). The right choice depends on your workflow; see the comparison table.

What is the Supabase Auth vs Clerk vs Auth0 in 2026?

Our top pick is Clerk (score 87/100): User management and authentication. Runners-up: Supabase Auth, Auth0.

Clerk free tier: Yes: 50,000 monthly retained users per app. Paid pricing: Pro $25/mo ($20 annual), then $0.02/MRU over 50K.

Is Supabase Auth free?

Supabase Auth free tier: Yes: 50,000 monthly active users on the Supabase Free plan (free projects pause after 1 week of inactivity, 2 active projects max). Paid pricing: Included in Supabase plans: Free $0 (50,000 MAU); Pro from $25/mo (100,000 MAU, then $0.00325 per MAU); Team from $599/mo; Enterprise custom. Advanced phone MFA, SAML SSO and leaked-password protection are paid features.

Auth0 free tier: Yes: up to 25,000 MAU. Paid pricing: Essentials from $35/mo (B2C, 500 MAU) or $150/mo (B2B).

How are these tools ranked?

Each tool is scored out of 100 on fit, vibe-coder friendliness, output quality, pricing, ecosystem, momentum and code ownership, using desk research of official docs and pricing pages. Affiliate status never affects scores.

Which is cheapest at 100,000 users: Supabase Auth, Clerk or Auth0?

Supabase Auth. Supabase Pro is $25/mo with 100,000 MAU included. Clerk Pro is about $1,025/mo billed monthly at 100,000 retained users, and Auth0 quotes that volume through sales.

Which has the biggest free tier?

Clerk and Supabase both cover 50,000 users for free (Clerk counts retained users per app; Supabase counts MAU but pauses idle free projects). Auth0 Free covers 25,000 MAU.

Can I switch from Clerk or Auth0 to Supabase Auth later?

Yes, but it is a migration: you export users, import them into Supabase Auth and swap the sign-in UI and session handling in your app. Plan and test it before you have a large user base.

Supabase Auth vs Clerk vs Auth0 (2026)

Three of the most-asked-about auth options side by side: Supabase Auth bundled with a Postgres backend, Clerk drop-in hosted auth for React and Next.js, and Auth0 enterprise-grade hosted auth from Okta. Compared on free tiers, what you pay at 50,000, 100,000 and 200,000 users, SSO and which one fits your app.

Editorial picks for this use case. See each tool page for its score breakdown. Last updated 2026-10-25.

Clerk

User management and authentication

Verified Oct 22

/ 100

Supabase Auth open source

Auth built into your Supabase Postgres, with 50,000 free MAU

Verified Oct 25

/ 100

Auth0

Identity platform by Okta

Verified Oct 24

/ 100

How the three differ

Clerk (87) is hosted auth built for React and Next.js, with prebuilt sign-in, user profile and organization components that take minutes to add. Supabase Auth (85) comes with a Supabase project: users live in your own Postgres database and row-level security policies can use the signed-in user directly. Auth0 (70) is standalone hosted auth from Okta that works with any backend and leads on enterprise and compliance features, but is priced per monthly active user (MAU) once you leave the free plan.

Free plans

Clerk Hobby is free up to 50,000 monthly retained users (MRU) per app; a user counts only when they come back 24+ hours after signing up. Supabase Free includes 50,000 MAU, but free projects pause after 1 week of inactivity and you get 2 active projects. Auth0 Free covers up to 25,000 MAU with 1 custom domain, and includes 1 enterprise connection.

What you pay at 50K, 100K and 200K users

50,000 users: Clerk Hobby and Supabase Free can both still be $0; Auth0 is past its 25,000 free limit and past the 30,000 MAU where its calculator stops showing self-serve prices (on Oct 17, 2026 its calculator showed B2C Essentials at $700/mo for 10,000 MAU and $2,100/mo for 30,000). 100,000 users: Supabase Pro is $25/mo with 100,000 MAU included (plus database compute you use); Clerk Pro is about $1,025/mo billed monthly ($25 plus 50,000 × $0.02); Auth0 is a sales quote. 200,000 users: Supabase Pro is about $350/mo ($25 plus 100,000 × $0.00325); Clerk Pro is about $2,825/mo ($25 plus 50,000 × $0.02 plus 100,000 × $0.018). Clerk counts retained users and Supabase and Auth0 count active users, so a one-time visitor costs nothing on Clerk.

SSO and enterprise customers

Clerk Pro includes 1 SSO connection, then $75/mo each. Supabase includes SAML 2.0 SSO only on Pro, with 50 SSO users then $0.015 per SSO MAU. Auth0 Free includes 1 enterprise connection plus self-service SSO and SCIM, but paid B2C plans drop them and you need a B2B plan. If you sell to many companies that each need SSO, WorkOS or Auth0 B2B fit better than any of the three free tiers.

Which to pick

Pick Clerk for the fastest setup and polished UI in a React or Next.js app that will stay under about 50,000 retained users for a while. Pick Supabase Auth if Supabase or Postgres is already your backend, you want users in your own database, or you expect 100,000+ users on a small budget. Pick Auth0 if you need auth independent of your stack with deep enterprise, compliance or Okta integration and can budget for per-MAU pricing after 25,000 users.

Side-by-side comparison

Tool	Score	Free tier	Pricing	Best for
Clerk	87	Yes: 50,000 monthly retained users per app	Pro $25/mo ($20 annual), then $0.02/MRU over 50K	The fastest auth for Next.js/React SaaS
Supabase Auth	85	Yes: 50,000 monthly active users on the Supabase Free plan (free projects pause after 1 week of inactivity, 2 active projects max)	Included in Supabase plans: Free $0 (50,000 MAU); Pro from $25/mo (100,000 MAU, then $0.00325 per MAU); Team from $599/mo; Enterprise custom. Advanced phone MFA, SAML SSO and leaked-password protection are paid features	Apps already on Supabase, or vibe-coded apps from Lovable and Bolt that need sign-in tied to row-level security
Auth0	70	Yes: up to 25,000 MAU	Essentials from $35/mo (B2C, 500 MAU) or $150/mo (B2B)	Enterprise identity requirements and compliance

FAQ

Which is better: Clerk or Supabase Auth or Auth0?: By our score, Clerk (87), Supabase Auth (85), Auth0 (70). The right choice depends on your workflow; see the comparison table.
What is the Supabase Auth vs Clerk vs Auth0 in 2026?: Our top pick is Clerk (score 87/100): User management and authentication. Runners-up: Supabase Auth, Auth0.
Is Clerk free?: Clerk free tier: Yes: 50,000 monthly retained users per app. Paid pricing: Pro $25/mo ($20 annual), then $0.02/MRU over 50K.
Is Supabase Auth free?: Supabase Auth free tier: Yes: 50,000 monthly active users on the Supabase Free plan (free projects pause after 1 week of inactivity, 2 active projects max). Paid pricing: Included in Supabase plans: Free $0 (50,000 MAU); Pro from $25/mo (100,000 MAU, then $0.00325 per MAU); Team from $599/mo; Enterprise custom. Advanced phone MFA, SAML SSO and leaked-password protection are paid features.
Is Auth0 free?: Auth0 free tier: Yes: up to 25,000 MAU. Paid pricing: Essentials from $35/mo (B2C, 500 MAU) or $150/mo (B2B).
How are these tools ranked?: Each tool is scored out of 100 on fit, vibe-coder friendliness, output quality, pricing, ecosystem, momentum and code ownership, using desk research of official docs and pricing pages. Affiliate status never affects scores.
Which is cheapest at 100,000 users: Supabase Auth, Clerk or Auth0?: Supabase Auth. Supabase Pro is $25/mo with 100,000 MAU included. Clerk Pro is about $1,025/mo billed monthly at 100,000 retained users, and Auth0 quotes that volume through sales.
Which has the biggest free tier?: Clerk and Supabase both cover 50,000 users for free (Clerk counts retained users per app; Supabase counts MAU but pauses idle free projects). Auth0 Free covers 25,000 MAU.
Can I switch from Clerk or Auth0 to Supabase Auth later?: Yes, but it is a migration: you export users, import them into Supabase Auth and swap the sign-in UI and session handling in your app. Plan and test it before you have a large user base.

Sources (checked Oct 23, 2026)

Related guides

Official sites

Clerk official site & pricing (verified 2026-10-22)
Supabase Auth official site & pricing (verified 2026-10-25)
Auth0 official site & pricing (verified 2026-10-24)