K 
Kinde
Auth, billing and feature flags for startups in one package.
NOT REALLY
why this verdict
Keep paying — Anthropic has not replaced it
Anthropic's version overlaps, but does not finish the security job, so this one still earns its $25/mo.
- A named launch, not a vibe named, unlinked
- Auth is bundled free into backend platforms. Anthropic, January 1, 2025 — no announcement link recorded yet.
- How much of the job it covers not the job editorial call
- Parts of it. The job still needs the tool to get finished.
- Is there a free way to do it? yes
- 2 of 2 listed replacements have a usable free tier: Clerk and Better Auth.
- What the call is worth $300/yr
- $25/mo at the entry paid tier — $300 a year per seat.
Reason composed from the fields above missing: announcement linked recorded: free replacement listed recorded: two or more escape hatches
- Threatened by
- Anthropic
- Since
- January 1, 2025
- List price
- $25/mo
- Per year
- $300
The backstory
Kinde bundles the three things every new SaaS needs on day one — who the user is, whether they paid, and what they can see. Bundling is its defence against free auth in Supabase and against a model generating a half-correct login page.
Escape hatches
C 
Clerk Better components.
clerk.com open_in_new B 
Better Auth Free and self-hosted.
better-auth.com open_in_new2 of 2 replacements have a usable free tier.