#2 in Authentication Free tier From $35/mo (Essentials)
Auth0
Enterprise-grade authentication as a service.
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About Auth0
Battle-tested identity platform with broad protocol support. Acquired by Okta, ideal for B2B apps with complex auth needs.
Features
MAU 7,500 (free)
Logins Unlimited (free)
Social Connections Unlimited (free)
Passwordless Yes (free)
MFA Yes (paid)
Enterprise Connections Paid only
Custom Domains Yes (paid)
Open Source No (managed)
Free tier limits
7,500 MAU, unlimited logins, social connections, passwordless