Headline rates
| Vendor | Cheapest published rate | Pricing model |
|---|---|---|
| Auth0 | Quote only | MAU-based with flat-rate floors. Per-user comparison requires assumptions about MAU per seat. |
| WorkOS | Quote only | Per-connection for SSO and Directory Sync. AuthKit (user auth) is free up to 1M MAU. |
Worked example
Acme Marketplace Co. (illustrative example, not a real company) has 300 employees and a single SAML SSO requirement. Annual cost at list price:
- Auth0: B2B Essentials floor is $150/mo flat ($1,800/yr). MAU-based above the included 500 MAU.
- WorkOS: ~3 enterprise connections at $125/mo each = $4,500/yr.
Numbers reflect list rates at 300 seats. Negotiated rates, bundled discounts, and per-MAU billing for CIAM products will all materially change the actual invoice.
Hidden cost differences
Auth0
- MAU is billed even for users who log in once and never return, until the 30-day rolling window expires.
- Enterprise connections (SAML, ADFS, custom OIDC) require Essentials or higher even for tiny B2B logos.
- AI Agents add-on adds 50 percent on top of the base subscription.
WorkOS
- Per-connection pricing scales with logo count, not user count - can be expensive for many small enterprise logos.
- Audit Logs and User Management API tiers are billed separately above free tier.
- Domain Verification and Magic Auth are separate line items.
Sources
- Auth0 pricing page (verified 2026-06-02)
- WorkOS pricing page (verified 2026-06-02)
Last verified June 2026.