Clerk vs Supabase vs Auth0

Clerk, Supabase, Auth0 side by side: price, free tier, who each one fits and when to skip it.

Item	Clerk	Supabase	Auth0
What it does	Drop-in login and user management with ready-made sign-in screens for React and Next.js.	Postgres database with login, file storage, edge functions and realtime in one project.	Okta's login platform with SSO, MFA and enterprise identity features.
Best for	A Next.js SaaS that needs Google login, user profiles and team accounts by tomorrow, without designing a single auth screen.	A solo founder who wants login, database and uploads in one place, with a region close to their users so the app feels fast.	A B2B SaaS selling to banks or large companies that will ask for SSO, audit logs and a security questionnaire.
Skip it if	You sell B2B to lots of small companies, since organizations are a paid add-on billed per active organization.	You plan to leave a free project idle while you validate, since free projects get paused after a week without activity.	You expect to outgrow the free tier soon, since 10k users on the paid B2C plan already cost $700 a month.
Setup	Needs a developer. Working login in about an hour; going live takes up to 48 hours waiting for DNS.	Needs a developer. Login and a first table in an afternoon; access rules and email setup take another day or two.	Needs a developer. Basic login in an afternoon; SSO for a business customer takes a few more days of setup and testing.
Price	Free; Pro $25/month ($20 billed yearly)	Free, then Pro from $25/month plus usage	Free up to 25k MAU; B2C Essentials from $35/month
What it costs in practice	A SaaS with 2,000 users returning each month stays on the free plan: $0. If you want MFA and your own branding, Pro is $25/month ($20 billed yearly). With 150 active customer teams, add 50 × $1 = $50, about $75/month in total (estimate).	A SaaS with 2,000 monthly active users and a 3 GB database outgrows the free 500 MB, so it goes to Pro: $25/month, which already covers one Micro server, 100k users, 8 GB of disk and 250 GB of egress. Add $10 for a custom domain on login and you're at about $35/month (estimate, in dollars).	A SaaS with 2,000 monthly active users fits in the free plan: $0. If it needs a paid feature, B2C Essentials bills by tier, so 2,000 users fall in the 2,500 tier: $175/month, or $1,925 a year paid upfront (estimate, in dollars).
Free plan	Up to 50k monthly retained users per app, no card required.	2 projects, 50k monthly users, 500 MB database and 1 GB of files; paused after a week idle.	Up to 25k monthly active users.
Free tier	50k retained users/month	50k MAU, 500 MB DB, 1 GB files	25k monthly active users
Price for 10k monthly users	Free (within the 50k free tier)	Free (Pro: $25/mo, 100k MAU included)	Free tier, or $700/mo on B2C Essentials
Self-host	No	Yes, open source	No
Open source	No: no	Yes: yes	No: no
Before you build	Production needs a domain you own: a free host address like yourapp.vercel.app is refused, since Clerk needs DNS records on it. The free plan has no MFA, no passkeys, no SMS codes and keeps the Clerk badge; those start on Pro at $25/month. On the free plan, sessions are fixed at 7 days, so users have to log in again every week; changing that requires Pro. Organizations are billed separately: 100 active ones are included, then $1 each per month, and custom roles are a $100/month add-on.	Free projects are paused after one week without activity, and you get only 2 free projects across all your organizations. The built-in email only reaches members of your Supabase team, at about 2 emails an hour. Real users get no confirmation or reset email until you plug in your own SMTP. Phone login doesn't send SMS by itself: you open an account with Twilio, MessageBird or Vonage and pay them per message. The free plan has no automatic backups; Pro keeps 7 days, and point-in-time restore is an add-on of about $100/month. The Pro fee is per organization, but each project runs its own server: every extra project adds compute (Micro is $10/month) on top.	Leaving the free plan is a big jump: B2C Essentials is $70/month for 1,000 users and $175 for 2,500; B2B Essentials is $300 for 1,000. The built-in email isn't for production: 10 emails a minute, no custom templates and every email comes from no-reply@auth0user.net. The free plan keeps logs for only 1 day, allows 5 organizations and doesn't include the stronger MFA options. Separate development and production environments only come with paid plans.
Price checked	Checked on Oct 28, 2026 · official pricing	Checked on Oct 28, 2026 · official pricing	Checked on Oct 28, 2026 · official pricing

Prices are read from each official pricing page on the date shown and can change. Always confirm before signing up.

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