Auth0 MAU Limit & Pricing Jump
Quick answer
Auth0 prices by monthly active users in tiers, and the Free plan ends at 25,000 MAU. B2B plans cost about 4x B2C at the same MAU, so model growth and block bot signups before you scale.
Most likely fix: Block bot signups
How to fix it
Try these in order — the most common fix is first.
1. Block bot signups
- Dashboard > Security > Attack Protection > Bot Detection
- Turn on Detection and choose a response such as Auth Challenge, then Save
Did this fix it?2. Compare tiers before you grow
- Use the plan table on auth0.com/pricing to price your expected MAU and B2C vs B2B plan
- Compare alternatives such as Firebase and Supabase before you are locked in
Did this fix it?
Symptoms
Bill jumps after growth; dashboard warns about MAU limit; B2B or MFA features suddenly cost more.
Why it happens
- Free plan covers up to 25,000 MAU; above that you need a paid plan
- Paid plans start at 500 MAU and price rises with each MAU tier
- B2B Essentials is $150/mo vs $35/mo B2C; Professional $800/mo vs $240/mo
- Extra enterprise SSO connections cost $100/month each; yearly billing is 11x the monthly price
This guide also covers
- auth0 pricing
- auth0 mau limit
- auth0 too expensive
- auth0 free plan limit
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