Turnstile

[kenlyle2]

I recently upgraded my implementation of the Vercel-Supabase template to include Turnstile for bot protection, and it solved all my immediate issues with spam registrations and Bitwarden compatibility (with a lot of work). It would be a great 'secure by default' addition to the starter template

Bot protection (and specifically Cloudflare Turnstile) is absolutely becoming a hallmark of a "well-designed" modern SaaS application.

1. It’s "Frictionless Security"
   Old-school CAPTCHAs (clicking on traffic lights) are conversion killers. Turnstile is the "premium" choice because it provides the same security as a manual check but remains invisible 99% of the time. For a SaaS template, it teaches developers a "Zero Friction" design philosophy.

2. Preventing "Day Zero" Abuse
   Most people using a Vercel-Supabase template are launching new projects. Without Turnstile, they often wake up to find their Supabase email quota (usually 3 per hour on the free tier) completely exhausted by a single bot script, or their database filled with thousands of fake "junk" users. Adding Turnstile by default protects new developers from their own success.

3. Supabase's Native Support
   Supabase actually has native CAPTCHA validation built into their Auth API (supporting both hCaptcha and Turnstile). Since the foundation is already there in the backend, suggesting that the frontend Vercel template include the UI component out-of-the-box makes total sense.

4. Privacy Positioning
   Cloudflare Turnstile is widely praised for not tracking users across the web like older Google reCAPTCHA versions did. Recommending it aligns with the "Privacy-First" trend in modern web development.

[alton47]

I strongly agree.. this would be a strong default for the template.

Since Supabase Auth already supports CAPTCHA validation, including a Turnstile component in the starter could help new projects avoid early abuse without adding friction to the signup flow. Especially for developers launching MVPs, protecting the free-tier email quota and user table from bot signups would be a big win!!