Auth Provider Cost Comparison
Enter monthly active users (presets 10k, 100k, 1M), the retained share for Clerk's MRU billing and the number of enterprise SSO connections. The table prices the same scenario on Clerk Pro, WorkOS and Supabase Pro, shows the math and highlights the cheapest. Estimates only; provider pricing pages prevail.
Math runs in your browser. Nothing is uploaded.
| Provider | Monthly | $ / user | Math |
|---|
—
Clerk Pro (monthly): $25 + MRU overage (MRU = MAU × retained %, 50k included, then $0.02 / $0.018 / $0.015 / $0.012 tiers) + SSO ($75 each for connections 2–15, 1 included). WorkOS: AuthKit $0 up to 1M MAU then $2,500 per extra 1M + SSO $125 each for 1–15, $100 for 16–30, $80 for 31–50, $65 for 51–100. Supabase Pro: $25 includes 100k MAU then $0.00325/MAU — this is the whole project plan (database, storage, etc.), not auth-only. Supabase prices SAML SSO per MAU, not per connection (50 included, then $0.015 per SSO MAU), so it is added only when you enter SSO MAUs. Auth0 is not listed because its official page is a slider without a clean public list price. Worked example: 200k MAU, 60% retained, 10 SSO → Clerk ≈ $2,060, WorkOS ≈ $1,250, Supabase ≈ $25 + 100k × $0.00325 = $350 (no SSO surcharge).
Estimates only. Official list prices as of 2026-11-02 (Asia/Shanghai); the provider's pricing page prevails. Sources: Clerk pricing · WorkOS pricing · Supabase pricing
Clerk Cost Calculator · WorkOS Cost Calculator · Twilio Verify Cost Calculator · SMS API Cost Comparison (US) · Twilio SMS Cost Calculator (US)
More in this group
- Payment Processing Fee Comparison Stripe vs PayPal vs Paddle vs Lemon Squeezy fees.
- Stripe Fee Calculator Stripe fees per order + reverse “what to charge”.
- Clerk Cost Calculator Clerk MRU, SSO and add-ons → monthly bill.
- WorkOS Cost Calculator WorkOS AuthKit MAU + SSO connections → monthly bill.
- Twilio Verify Cost Calculator Twilio Verify OTP volume → monthly cost and $ per signup.
- SMS API Cost Comparison (US) Twilio vs Telnyx vs Plivo US SMS and OTP cost.
- Twilio SMS Cost Calculator (US) Twilio US SMS segments + carrier fees → monthly cost.
- Transactional Email API Cost Comparison Amazon SES vs Resend vs Mailgun vs Postmark for one volume.
How it works
- Which auth provider is cheapest?
- It depends on users and enterprise SSO. For pure B2C volume Supabase Pro is cheapest on list price; with many enterprise SSO connections WorkOS (1M MAU free) often beats Clerk, while Clerk's MRU billing helps apps with many one-day signups.
- What is the worked example?
- 200k MAU, 60% retained, 10 SSO connections: Clerk Pro ≈ $25 + $1,360 MRU + $675 SSO = $2,060; WorkOS ≈ $0 + 10 × $125 = $1,250; Supabase Pro ≈ $25 + 100,000 × $0.00325 = $350 (no SSO surcharge).
- Why does Supabase look so cheap?
- Supabase Pro ($25/mo, 100k MAU included, then $0.00325/MAU) is the whole project plan, not an auth-only price, and SAML SSO is priced per SSO MAU (50 included, then $0.015) rather than per connection, so it is only added when you enter SSO MAUs.
- Why is Auth0 not included?
- Auth0's official pricing page is an interactive slider without a clean public list price, so we do not list numbers we cannot verify (as of 2026-11-02).
- MAU vs MRU — why does it matter?
- Clerk bills only users who return at least one day after signup, while WorkOS and Supabase count every active user. For viral or trial-heavy apps the retained share can cut Clerk's billable users a lot.