Clerk vs Supabase Auth
Default scenario: At 50K monthly active users, no enterprise SSO connections, both have an estimated bill of $0/yr.
The services may differ in features, performance, support and the work you need to do yourself. Read the notes and test what matters to your setup.
Your selected usage
50K monthly active users, no enterprise SSO connections
- Clerk: $0/yr estimated
- Supabase Auth: $0/yr estimated
Estimated costs at different usage levels
| Usage | Clerk | Supabase Auth |
|---|---|---|
| Default scenario50K monthly active users, no enterprise SSO connections | $0/yrHobby · $0 MAU + $0 SSO | $0/yrFree · $0 MAU + $0 SSO |
| Consumer app500K monthly active users, no enterprise SSO connections | $98,700/yrPro (100k-1M MRU) · $7,200 MAU + $0 SSO | $15,900/yrPro · $1,300 MAU + $0 SSO |
| B2B SaaS20K monthly active users, 25 enterprise SSO connections | $20,100/yrPro (up to 100k MRU, 16+ SSO) · $0 MAU + $600 SSO | $3,900/yrPro · $0 MAU + $300 SSO |
| Startup5K monthly active users, no enterprise SSO connections | $0/yrHobby · $0 MAU + $0 SSO | $0/yrFree · $0 MAU + $0 SSO |
MFA, custom domains, audit logs and SCIM are paid add-ons on several vendors. Check the notes. Try your own numbers against all authentication providers.
Side by side
| Clerk | Supabase Auth | |
|---|---|---|
| What it is | Developer-focused auth and user management with prebuilt UI components, billed per monthly retained user with enterprise SSO priced per connection. | Auth bundled with Supabase's hosted Postgres. 50k MAU free; Pro includes 100k MAU then $0.00325 per MAU. |
| Headquarters | 🇺🇸 United States | 🇺🇸 United States |
| Parent jurisdiction | 🇺🇸 United States | 🇺🇸 United States |
| EU self-serve plan | No / not documented | Available; check eligible plans and regions |
| GDPR DPA | Yes | Yes |
| Billing | subscription | subscription |
| Free tier | Hobby plan with 50,000 monthly retained users, no enterprise SSO or MFA. | Free plan with 50,000 MAU (projects pause after a week of inactivity); no SAML SSO. |
| Open source | No | Yes · self-hostable |
| Source last checked | 2026-10-06 | 2026-10-06 |
| Pricing evidence | Published rates | Published rates |
Which should you choose?
Supabase Auth has the lower estimated bill at every usage level we tested, from 5K monthly active users, no enterprise SSO connections to 5M monthly active users, no enterprise SSO connections.
Choose Clerk if…
Our data shows no advantage on price, residency, jurisdiction or licensing. Compare features in the notes below.
Choose Supabase Auth if…
- it has the lower estimated bill at Consumer app and B2B SaaS usage
- you need EU data residency on a self-serve plan
- you want open-source software you can run yourself
Based on estimated list-price bills and the facts above. Features, performance and support aren’t scored.
Clerk pricing
Calculated from the listed vendor rates; exclusions still apply.
| Plan | Base fee / month | 1k additional active users | Enterprise connection / month |
|---|---|---|---|
| Hobby | $0 | $0 | $0 |
| Pro (up to 100k MRU) | $25 | $20 | $75 |
| Pro (100k-1M MRU) | $1,025 | $18 | $75 |
| Pro (1M-10M MRU) | $17,225 | $15 | $75 |
| Pro (up to 100k MRU, 16+ SSO) | $1,075 | $20 | $60 |
| Pro (100k-1M MRU, 16+ SSO) | $2,075 | $18 | $60 |
| Pro (1M-10M MRU, 16+ SSO) | $18,275 | $15 | $60 |
Pro is $25/month ($20 billed annually) with 50,000 monthly retained users (MRU) included; a user only counts if they come back at least a day after signing up. Graduated MRU overage of $0.02 (50k-100k), $0.018 (100k-1M), $0.015 (1M-10M) and $0.012 above 10M; the volume bands are modelled as separate plans with the lower bands folded into plan_month. Enterprise SSO: 1 connection per app included on Pro and Business, then $75/month each for connections 2-15 and $60 for 16-100 (also folded into the 16+ plans). Business ($300/month, $250 annually) adds SOC 2 report, priority support and 10 seats at the same usage prices, so it is never cheaper. Add-ons: Enhanced B2B Authentication and Enhanced Administration at $100/month each ($85 annually). MFA is included from Pro. Data is hosted in the US only; transfers rely on the EU-US Data Privacy Framework and a DPA.
Clerk plan limits, full rates and cheaper alternatives · official pricing page
Supabase Auth pricing
Calculated from the listed vendor rates; exclusions still apply.
| Plan | Base fee / month | 1k additional active users | 1k SSO active users |
|---|---|---|---|
| Free | $0 | $0 | $0 |
| Pro | $25 | $3.25 | $15 |
Pro is $25/month per organisation (includes $10 of compute credits, which covers one small instance) with 100,000 MAU, then $0.00325 per MAU; third-party auth MAUs are priced the same. SAML SSO is available on Pro and Team with no per-connection fee, but SSO users are billed at $0.015/MAU after the first 50, which the calculator's per-connection SSO input cannot show. Advanced MFA (phone) is $75/month for the first project and $10/month per extra project. Team ($599/month) adds SOC 2, SSO for the dashboard and longer log retention at the same usage rates. Projects can be created in EU regions (Frankfurt, Ireland, London, Paris, Stockholm, Zurich) on every plan. The auth server (GoTrue) is open source and can be self-hosted. Supabase, Inc. is a US company.
Supabase Auth plan limits, full rates and cheaper alternatives · official pricing page
Frequently asked questions
Is Clerk cheaper than Supabase Auth?
Supabase Auth has the lower estimated bill at every usage level we tested, from 5K monthly active users, no enterprise SSO connections to 5M monthly active users, no enterprise SSO connections. At 50K monthly active users, no enterprise SSO connections, the estimates are $0/yr for Clerk and $0/yr for Supabase Auth. Estimates use list prices and leave out features, support and operating costs.
Do Clerk and Supabase Auth offer EU data residency?
Supabase Auth offers EU data residency on a self-serve plan. Clerk doesn’t document it on a self-serve plan.
Do Clerk and Supabase Auth have a free tier or trial?
Clerk: Hobby plan with 50,000 monthly retained users, no enterprise SSO or MFA. Supabase Auth: Free plan with 50,000 MAU (projects pause after a week of inactivity); no SAML SSO.
Where are Clerk and Supabase Auth based?
Clerk is headquartered in the United States. Supabase Auth is headquartered in the United States.