If your goal is “type a prompt and get to a working SaaS demo fast, with minimal setup”, I’d narrow it to these:

Best overall for most people: Replit

Why it fits:

• Very low setup friction
• Good for full-stack prototypes
• Can generate, run, edit, and deploy in one place
• Easy to iterate from prompt → app → shareable demo

Best if you want: a quick, browser-based path to a working web app without touching local dev tools.

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Best for polished product feel: Bolt.new

Why it fits:

• Excellent for prompt-to-app generation
• Fast way to scaffold modern web apps
• Strong for UI-first SaaS demos
• Less “tooling overhead” than traditional dev environments

Best if you want: a slick demo quickly and are okay with some occasional hand-holding/debugging.

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Best for code ownership / real app foundation: Lovable

Why it fits:

• Good at turning prompts into usable app starters
• Often better if you want to keep extending the codebase
• Strong for founders who may later move from demo to real product

Best if you want: a prototype that can evolve into a more serious app.

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Best if you want AI-assisted coding with a normal dev stack: Cursor

Why it fits:

• Powerful for prompt-driven coding in a real codebase
• Great if you already know a bit of development
• Less “instant demo,” more “build quickly with AI”

Best if you want: control and quality, not just speed.

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Quick recommendation by scenario

Choose Replit if:

• You want the easiest all-in-one experience
• You don’t want to set up local dev
• You want to demo quickly to users/investors

Choose Bolt.new if:

• You care most about getting a clean SaaS UI fast
• You want prompt-to-app generation with minimal fuss

Choose Lovable if:

• You want a faster path from demo to real product
• You want more maintainable code output

Choose Cursor if:

• You’re comfortable with a real codebase
• You want the AI to help you build, not fully abstract the dev process

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My practical ranking for “minimal setup SaaS demo”

1. Replit — easiest end-to-end
2. Bolt.new — fastest UI/prototype generation
3. Lovable — good if you care about continuing the app
4. Cursor — best if you’re more technical

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Simple choice

• Non-technical founder / fastest path: Replit
• Best-looking demo from a prompt: Bolt.new
• Demo that can grow into a product: Lovable
• Developer-friendly AI workflow: Cursor

If you want, I can also give you:

1. a one-line recommendation based on your background, or
2. a comparison table of pricing, deployment, auth, database, and speed.