(I'm a cofounder of Tesseral)

We're huge fans of Better Auth -- it's a really great offering. They might have their own take on how we differ, but here's my best attempt at a quick comparison.

We take pretty different approaches to roughly the same family of problems.

Better Auth is focused on being a great library for TypeScript. If you write Typescript and want to build your own auth, they're a great bet.

We're more of an API-first service that's agnostic to the language or framework that you use. We have a pretty opinionated product that is meant to handle auth for you -- it's not really an auth library per se.

I'm not even sure better auth is worth comparing to, there are so many critical open issues that impact not only security but feature parity with much more established and mature open source solutions.

Not to be harsh but the website not loading earlier clearly doesn't set a good first impression.