Best Auth0 alternatives in 2026

Auth0 is an identity platform that makes authentication easy for developers. Add login, signup, and MFA with just a few lines of code. Support for social logins, enterprise SSO, and passwordless.

Here are the real cost and limitation gotchas that push teams to look elsewhere:

• •Overage pricing at $0.07/MAU applies per user beyond the base limit. This was increased 300% from the previous $0.023/MAU rate, a 50,000-MAU B2C app on Essentials pays ~$3,500/month, not $35.
• •B2B Essentials limits you to 3 enterprise SSO connections and Professional to 5. Each enterprise customer that requires SSO consumes one connection, signing your sixth enterprise client forces an upgrade to Enterprise pricing (typically $10,000+/month).
• •SMS-based MFA is not included in the base price. At scale, SMS verification costs roughly $0.0083 per message, a 100,000-MAU app sending one MFA text per user per month adds ~$830/month.
• •The free plan lacks separate development and production environments. Running auth against production data during development is a real compliance and security risk that most teams eventually pay to fix.

The 8 alternatives below cover the same core job (identity & access) with different trade-offs. Ranked by real-signal score: G2 and Capterra ratings, media mentions, and editor review.