"AI website builder" now covers two very different products: tools that generate a full, ownable web app from a prompt, and hosted platforms that build a marketing site for you. They differ in what you own, what you can change, and — the part most lists skip — what security holes they leave behind.
Here are the best AI website builders in 2026, sorted by type, with an honest take on ownership and security.
Quick comparison
| Tool | Type | You own the code? | Security gap |
|---|---|---|---|
| Lovable | Full app (React + Supabase) | Yes | Supabase RLS off → public data |
| Bolt.new | Full app (in-browser) | Yes | Secrets in the client bundle |
| v0 | Full app (Next.js) | Yes | NEXT_PUBLIC_ leaks, unguarded routes |
| Replit | Cloud IDE + hosting | Yes | Public Repls leaking secrets |
| Framer AI | Marketing site | No (hosted) | Low — no backend you control |
| Webflow AI | Marketing site / CMS | No (hosted) | Low — hosted |
| Wix / Squarespace AI | Marketing site | No (hosted) | Low — hosted |
App builders — full apps from a prompt
These generate real, ownable code. More power, more risk.
- Lovable — full React + Supabase apps, deployed for you. Best for non-technical founders shipping a product. Its classic failure is leaving Supabase RLS off. See Is Lovable safe?
- Bolt.new — builds and runs a full-stack app in the browser. Great for prototypes; watch for secrets in the bundle. See Is Bolt safe?
- v0 — Vercel's generator, strongest for clean Next.js. Watch
NEXT_PUBLIC_and unguarded route handlers. See Is v0 safe? - Replit — all-in-one cloud IDE with hosting and an agent. Keep Repls private and secrets in the manager. See Is Replit safe?
Site builders — marketing sites, hosted
- Framer AI — design-led marketing sites with strong animation; hosted, so little backend risk.
- Webflow AI — visual CMS with AI assists; powerful for content sites.
- Wix ADI / Squarespace AI — fastest path to a simple, hosted business site.
Because these host the backend, your security surface is small — but you trade away ownership and flexibility.
Which should you pick?
- Shipping a product/app → Lovable, Bolt or v0 (or Replit for all-in-one). You own the code — and the responsibility to secure it.
- Marketing site → Framer or Webflow for design; Wix/Squarespace for speed.
- Either way → if it has a backend you control, scan it before launch.
Whatever you build, the same gaps recur — exposed secrets, missing auth, open databases. Nurbak scans any deployed site or app for these in seconds, free. See the full vibe coding tools comparison for the app-builder deep dive.