Is WorkOS free for authentication?

No — there's no free plan, but no monthly fee either: you pay for what you use (AuthKit: monthly active users $0.0025 per MAU).

How much does WorkOS cost for authentication?

AuthKit is free up to 1 million monthly active users, then $2,500/month per additional million; enterprise SSO and Directory Sync are $125 per connection per month. At list prices: monthly active users 1k MAU: $0/month (AuthKit); monthly active users 10k MAU: $0/month (AuthKit); monthly active users 250k MAU: $0/month (AuthKit).

WorkOS pricing

How WorkOS charges, what to know before you commit, and what you'd pay at your usage — next to what the alternatives would cost for the same thing.

How it charges

Checked 2026-10-03 on workos.com ↗ · USD, list prices

In short

AuthKit is free up to 1 million monthly active users, then $2,500/month per additional million; enterprise SSO and Directory Sync are $125 per connection per month.

Free plan: Yes
Side project: $0/mo AuthKit
Growing: $0/mo AuthKit
Scaling: $0/mo AuthKit

What the model leaves out

The first 1M MAU are free; each additional 1M MAU costs $2,500/mo (billed per million — modeled as $0.0025 per user). Enterprise SSO and Directory Sync are $125 per connection per month (volume discounts from 16 connections), not modeled.

Before you commit

Users beyond 1M are billed per block of 1M ($2,500/month each), not per user.
Each enterprise customer on SSO or Directory Sync is one connection at $125/month, with discounts from 16 connections.
A custom domain for AuthKit, Admin Portal and the email sender is an extra $99/month.
A user counts as active for any user action in the month: sign-up, sign-in or profile update.