Auth0 vs Microsoft Entra ID

Auth0 and Microsoft Entra ID are both developer identity / ciam solutions. Auth0 developer-first identity platform for customer authentication and CIAM, while Microsoft Entra ID microsoft's cloud identity platform with deep M365 and Azure integration. The best choice depends on your organization's size, technical requirements, and budget.

Choose Auth0 if best developer experience in the identity industry with comprehensive SDKs is your priority and development teams building customer-facing applications that need flexible, API-first authentication with extensive SDK support and customizable login experiences. Choose Microsoft Entra ID if included in Microsoft 365 licensing — significant cost savings for M365 shops matters most and organizations heavily invested in Microsoft 365 and Azure that want unified identity management across their Microsoft ecosystem.

Microsoft Entra ID starts at Free tier with M365; P1 $6/user/mo; P2 $9/user/mo (per-user (bundled with microsoft licenses)). Auth0 starts at Free up to 25,000 MAUs; B2C paid from $35/mo; B2B paid from $150/mo (per monthly active user (mau)). As always, the sticker price only tells part of the story. Factor in add-ons, implementation costs, and what's actually included at each tier.

It depends on how deeply Auth0 is embedded in your stack. Most teams run both in parallel for a few weeks before cutting over. Check whether Microsoft Entra ID supports importing your existing configs or policies. That's usually the biggest time sink.