01
Clerk Lowest estimate
Hobby
$0/ month equivalent
COMPARE / AUTHENTICATION
Authentication, with the math.
Model the cost of active users and returning users without confusing the two.
Consumer email/social authentication for one application. No SMS, enterprise SSO, directory sync, custom email delivery or advanced security add-ons. Clerk bills retained users, not all active users. Enter that ratio explicitly.
YOUR COMPARISON, YOUR CALL
2 / 4 selectedBring your shortlist.
Choose up to four products for a closer look. The full cost ranking stays below.
Showing 3 of 3 supported products. Find products for this comparison
Your workload
Monthly usage. Adjust the assumptions to match your product.
users / month
Distinct users who authenticate or perform a billable activity during the month.
Maximum 10,000,000 users / month% of active users
Clerk retained-user estimate. Percentage returning more than 24 hours after signup. Other providers use active users.
Maximum 100 % of active usersEstimates are in USD before taxes. Your usage stays in this URL.
| Decision guideOne shared workload. Different trade-offs. | ||
|---|---|---|
| Monthly equivalentUSD · before tax | $0Lowest in your shortlistFree · auth allowance | $0Lowest in your shortlistHobby |
| Payment commitment | Monthly | Monthly |
| Fits this workload? | Within modeled limits | Within modeled limits |
| What to know | Assumes auth data and traffic stay within Free database and egress allowances. Inactive free projects can pause. | Retained users return at least 24 hours after signup. Hobby has feature and dashboard-seat limits. |
| Outside the estimate | SMS, enterprise SSO, directory synchronization, custom domains, custom email delivery and optional security add-ons. SMTP delivery and usage beyond bundled database, storage and transfer allowances. | SMS, enterprise SSO, directory synchronization, custom domains, custom email delivery and optional security add-ons. |
| Evidence | Official pricing ↗Checked 2026-10-05 | Official pricing ↗Checked 2026-10-05 |
Look ahead, before you commit.
Vary monthly active users. Keep all other inputs fixed.
ClerkSupabase Auth
View exact values and assumptions
Each point follows your selected plan. Automatic choices use the lowest eligible supported plan per product. Missing values mean no supported plan fits. This varies one input, not all costs with customer count.
| Monthly active users | Clerk | Supabase Auth |
|---|---|---|
| 2,500 users / month | $0 | $0 |
| 5,000 users / month | $0 | $0 |
| 10,000 users / month | $0 | $0 |
| 20,000 users / month | $0 | $0 |
| 50,000 users / month | $0 | $0 |
| 100,000 users / month | $225.00 | $25.00 |
Your monthly comparison
3 eligible products in this loaded set · Lowest modeled cost first
01
Supabase Auth Lowest estimate
Free · auth allowance
$0/ month equivalent
01
WorkOS AuthKit Lowest estimate
AuthKit
$0/ month equivalent
Prices reflect dated, supported plans. Matching a category does not mean matching features. How estimates work