The main benefit is that we're much, much easier to use with React. Since the Okta acquisition, we've also had several migrate over for better pricing.

If you're interested in the technical reasons why & how:

Auth0 is structured as on OAuth provider, which is great for verifying identity but it stops there. Developers are responsible for persisting a session and managing user data on their own.

Developers using auth0 will normally create a "users" table in their database and have their backend team create endpoints to manage the data. Clerk handles all that for you... we expose useUser() to the frontend, and devs can call things like `user.update({firstName: "foo"})` to retrieve profile information. (Most teams using Clerk don't have a users table at all and use our API instead, though plenty still choose to keep it synced in their database.)

We're able to offer hooks like useUser() because we manage sessions, so we always know which user is signed in. As part of managing sessions, we include session revocation and device management - things that every company will need eventually but may skip over from the start. Because of this, we're often seen as more secure by default than auth0.