01
Clerk Lowest estimate
Hobby
$0/ month
COMPARE / AUTHENTICATION
Authentication, with the math.
Model the cost of active users and returning users without confusing the two.
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.
Your monthly comparison
3 eligible products · Lowest estimated cost first
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.
01
Supabase Auth Lowest estimate
Free · auth allowance
$0/ month
01
WorkOS AuthKit Lowest estimate
AuthKit
$0/ month
Look ahead, before you commit.
Vary monthly active users. Keep all other inputs fixed.
ClerkSupabase AuthWorkOS AuthKit
View exact values and assumptions
Each point uses 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 | WorkOS AuthKit |
|---|---|---|---|
| 2,500 users / month | $0 | $0 | $0 |
| 5,000 users / month | $0 | $0 | $0 |
| 10,000 users / month | $0 | $0 | $0 |
| 20,000 users / month | $0 | $0 | $0 |
| 50,000 users / month | $0 | $0 | $0 |
| 100,000 users / month | $225.00 | $25.00 | $0 |
Lowest cost among supported plans. Prices and availability can change. Understand the methodology