Auth0 by Okta and Clerk both offer comprehensive user authentication solutions, but they differ in several key aspects. Auth0 provides an all-in-one package that includes features such as social login, bot detection, UI components, anonymous users, single-sign-on (SSO), and multi-factor authentication (MFA). However, it is relatively expensive, with a cost of $1400/month for 20,000 monthly active users (MAUs). Clerk, on the other hand, offers embeddable UIs, APIs, and admin dashboards for user management, along with official SDKs for various frameworks such as Next.js, React, and Node.js. Clerk's pricing is more flexible, with a free tier of 10,000 MAUs and a $25/month Pro tier that charges $0.02 per additional MAU. Enhanced authentication and admin features are available as add-ons for an additional $100/month each. Ultimately, the choice between Auth0 and Clerk depends on your specific needs regarding features and budget.

Clerk offers extensive developer support with official SDKs for a wide range of frameworks and languages, including Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby/Rails. Additionally, there are many community SDKs for other frameworks and languages. Auth0 by Okta also provides robust developer support with various SDKs and tools, but it may not have the same breadth of official SDKs as Clerk. If having comprehensive and diverse SDK support is crucial for your development process, Clerk may be a better choice.

For a growing app, Clerk is generally more cost-effective compared to Auth0 by Okta. Clerk offers a free tier of 10,000 monthly active users (MAUs) and a Pro tier at $25/month with an additional $0.02 per extra MAU. Enhanced authentication and admin add-ons are available for $100/month each. On the other hand, Auth0's pricing is relatively higher, with a cost of $1400/month for 20,000 MAUs. Therefore, if you are looking for a more budget-friendly option as your app scales, Clerk is likely the better choice.

Auth0 by Okta is a B2C identity management solution that offers an all-in-one package including social login, bot detection, UI components, anonymous users, single-sign-on (SSO), and multi-factor authentication (MFA). The free tier includes 7,500 monthly active users (MAUs), but higher usage can become expensive, with 20,000 MAUs costing $1400 per month.

The main features of Auth0 by Okta include passwordless authentication, social login, multi-factor authentication (MFA), breach detection, brute-force protection, and extensive documentation and community support.

Pros of Auth0 by Okta include its support for passwordless, social, and multi-factor authentication, extensive documentation and community support, and built-in breach detection and brute-force protection. Cons include restrictions on active users and features in the free tier, and the higher cost of advanced tiers.

Clerk is a comprehensive authentication and user management platform that provides embeddable UIs, APIs, and admin dashboards for user management. It supports multiple frameworks and languages through official and community SDKs.

Clerk offers embeddable UIs, APIs, and admin dashboards for user management. It provides official SDKs for Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby/Rails, along with community SDKs for other frameworks and languages. Clerk also includes features such as SMS authentication, device tracking and revocation, simultaneous sessions, and SAML authentication.

Clerk has a free tier that supports up to 10,000 Monthly Active Users (MAUs). The Pro tier costs $25 per month with an additional charge of $0.02 per MAU. Enhanced authentication features and an admin add-on each cost an additional $100 per month.

Clerk supports a variety of frameworks and languages through official SDKs, including Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby/Rails. There are also many community SDKs available for other frameworks and languages.

Enhanced authentication features in Clerk, which include SMS authentication, device tracking and revocation, simultaneous sessions, and SAML authentication, cost an additional $100 per month.

The admin add-on for Clerk includes features such as user impersonation and enhanced roles. This add-on costs an additional $100 per month.