Bolt
In-browser full-stack app builder by StackBlitz.
Bolt.new runs a full dev environment in the browser, generating and executing code for React, Next.js, Astro, and more. Fast prototyping without local setup.
Bolt alternatives
Other tools in the Prompt to App category.
Lovable
Prompt to full-stack app, Supabase built in.
v0
Vercel AI UI generator for React and Next.js.
Base44
Prompt-to-app builder for internal tools and MVPs.
Rork
AI-first mobile app builder using React Native.
Softgen
AI software architect for end-to-end web apps.
Databutton
AI-first builder for data apps and internal tools.
What to check before shipping
Bolt is good at getting a working demo fast. These are the production checks it typically skips.
Auth Check Only in Client Code
The auth gate runs only in a client component (a useEffect redirect or conditional render), so an attacker can bypass it by calling the API route directly.
IDOR Vulnerability on REST Endpoint
A REST endpoint returns resources by id without checking the caller owns them, so any signed-in user can read another user's data by changing the id.
Missing Row Level Security on Supabase Table
A public Supabase table has RLS disabled or an overly permissive policy, so any signed-in user can read or modify every row regardless of ownership.
Secret API Key Exposed in Client Bundle
A sensitive key (Stripe secret, OpenAI, Supabase service role) has a NEXT_PUBLIC_ prefix, so it is inlined into the browser bundle for anyone to read.
For a deeper dive on production readiness specific to Bolt, see the Bolt vibe coding guide.
Bolt on the blog
Bolt.new Apps: 7 Production Issues and How to Fix Them
Bolt.new gets you to a working app in minutes, but its code has patterns that break in production. Seven specific issues, with code-level fixes.
toolsCursor vs Lovable vs Bolt: What Each Tool Gets Right (and What They All Skip)
An honest comparison of Cursor, Lovable, and Bolt: what each does well, the gaps all three leave, and how to close them before you ship.
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