“AI app builder” now covers everything from a prompt box that spits out a React component to an autonomous agent that provisions a database and ships to production. They are not the same product, and ranking them on one axis is how people end up disappointed. So we built the same reference app — sign-in, a database table, an admin view, and a public page on a real domain — in each tool, and scored what happened.
Disclosure: Build Lab is published by Y Build, which competes in this space. This ranking is about the other tools. Where we use Y Build, we say so, and the full method is in our flagship teardown.
The rubric
Five things decide whether a tool is worth your time:
- Time to a working preview — prompt to something you can click.
- Backend & database — does it generate auth + a real DB, or just UI?
- Deploy story — how far from “preview” to a live URL on your domain.
- Code ownership — can you export and keep the code, or are you renting it?
- Ceiling — how far past the MVP it holds up before you fight it.
The ranking
| Tool | Best for | Backend / DB | Deploy story | From |
|---|---|---|---|---|
| Lovable | Non-technical founders shipping a SaaS MVP | Yes (Supabase) | Built-in + custom domain | $20/mo |
| Bolt.new | Fast throwaway prototypes, framework choice | External services | Bring your own host | $25/mo |
| Replit Agent | All-in-one build + host + run | Yes (Postgres) | Built-in | $25/mo |
| v0 | UI in an existing Next.js project | No | Vercel | $20/mo |
| Cursor | You write code, AI works alongside | N/A (your stack) | Your pipeline | $20/mo |
1. Lovable — the default for non-technical founders
Lovable is the breakout of this wave: a $6.6B valuation on a $330M Series B led by Benchmark in February 2026, 8M+ users in under a year, and $300M+ ARR. The reason it earns the top slot isn’t the funding — it’s that it generates an end-to-end app, including auth and a real database via Supabase, with the best out-of-the-box visual polish of the group. React code export means you’re not locked in.
Where it bites: it can feel sluggish once the backend gets complicated, and very custom logic still needs a developer. But for “I have an idea and a landing page in my head,” nothing else gets you to a shippable SaaS MVP faster.
2. Bolt.new — fastest scaffold, weakest follow-through
Bolt.new (by StackBlitz) is the quickest way to go from a sentence to a running app in a browser tab. Its edge over Lovable is framework flexibility — React, Vue, Svelte, Astro — plus mobile via Expo. At $25/mo it gives experienced builders more control.
The catch is the part the demos skip: it leans on external services for the database and gives you no built-in deploy, and it’s the one that struggles most once you iterate past the first working version. Perfect for prototypes you’ll throw away or hand to a real codebase.
3. Replit Agent — the most all-in-one
Replit’s Agent 3 (shipped September 2025) brought roughly 10× the autonomy of prior versions: autonomous app generation, real-browser testing, background tasks, even generating other agents, across 50+ languages. Crucially it’s the only one here where build, database (Postgres), hosting, and deploy live in one place — the Core plan is $25/mo and includes $25 of usage credits.
The trade is ecosystem lock-in: you’re building inside Replit’s world. If that’s fine, it’s the least-glue-required path from idea to running-and-hosted.
4. v0 — best UI, no backend
v0 (by Vercel) has the best React + Next.js + shadcn/ui design fidelity of anything here. But it’s honest about its lane: no backend generation. You get the interface; you wire up your own API routes and database. It’s a force multiplier for a single screen inside an existing Next app, not a way to ship a whole product.
5. Cursor — when you’ve outgrown prompt-to-app
Cursor isn’t a prompt-to-app builder; it’s the AI IDE you graduate to. Once your project has real structure, you want agents working alongside your code, not regenerating it. Different tool, different moment — but it’s where serious builds end up, so it earns a spot.
How to choose in one line
- Non-technical, shipping a SaaS MVP → Lovable
- Fast prototype you’ll throw away → Bolt.new
- One screen inside an existing Next.js app → v0
- Want database + hosting + deploy in one place → Replit Agent
- You write code and want AI in the loop → Cursor
Bottom line
There is no single “best.” There’s “best for the job in front of you.” If you only remember one thing: the demos all stop at a working preview, and the real difference shows up at deployment and iteration. That’s the test we run on every tool — see the timed, reproducible version in the flagship teardown.