Auth0 vs Clerk vs Authon: Migrating Your Auth Layer in 2026

So last week I stumbled across a Reddit post where someone was genuinely shocked that their open source auth project got written up by a stranger. It hit home because I've spent the last few months evaluating auth providers for two different projects — and honestly, the landscape has shifted a lot. If you're currently on Auth0 or Clerk and wondering whether the grass is greener, or if you're starting fresh and drowning in options, this is the comparison I wish I had six months ago. Why I Started Looking Auth0 has been my default for years. It works. But the pricing model started squeezing one of my side projects hard — turns out "free tier" means something very different when you actually get users. Clerk came along with a slick DX and I migrated one project to it. Then I heard about Authon and decided to do a proper three-way comparison. Let me be upfront: there's no single winner here. Each of these tools makes different tradeoffs, and the right choice depends on your specific situat