Four prompt-to-app tools compared on stack, deployment, code ownership and pricing model, with recommendations by scenario rather than a single winner.
Quick answer: If your project must be a Next.js app, v0 (by Vercel) and Massvai generate Next.js by default. v0 builds on Next.js, React, Tailwind and shadcn/ui and deploys to Vercel. Massvai scaffolds Next.js 15 with Supabase and Stripe and deploys through GitHub to Vercel. Bolt supports JavaScript frameworks broadly, so Next.js is possible but not its only path, and it hosts on Bolt Cloud by default. Lovable doesn't offer Next.js: new Lovable apps use TanStack Start with a built-in backend or Supabase. All four let you take your code to GitHub.
Quick Verdict
There's no single best tool here, because the four products make different bets:
- Lovable bets on an all-in-one platform: it builds, hosts and runs the backend for you, on its own fixed stack.
- Bolt bets on flexibility: many JavaScript frameworks, built-in hosting and databases, and even Expo mobile apps.
- v0 bets on the Vercel ecosystem: Next.js-first code, GitHub pull-request workflows and one-click Vercel production deploys.
- Massvai bets on one opinionated full-stack template: Next.js 15 + Supabase + Stripe, built by an agent, then pushed to GitHub and deployed to Vercel, with every file exportable.
If "Next.js" is a hard requirement, start with v0 or Massvai. If it isn't, Lovable and Bolt deserve a fair look.
Comparison table
Based on each vendor's official site and documentation, checked October 2026. Plans change often, so confirm current details before you buy.
| Lovable | Bolt | v0 | Massvai | |
|---|---|---|---|---|
| Default framework | TanStack Start (new apps from May 13, 2026); React + Vite for older apps | JavaScript frameworks; Node.js backends | Next.js, React, TypeScript, Tailwind, shadcn/ui | Next.js 15, TypeScript, Tailwind |
| Can you choose Next.js? | No (fixed stack) | Yes, among other JS frameworks | Yes, it's the default | Yes, it's the default |
| Database / backend | Built-in Lovable Cloud (managed PostgreSQL, auth, storage) or Supabase | Bolt Cloud database or Supabase | Vercel Marketplace integrations (e.g. Neon, Supabase, Upstash) | Supabase |
| Payments | Built-in payments (paid plans) or your own Stripe | Stripe via Bolt Cloud | Stripe available as a Marketplace integration | Stripe in the stack |
| Default hosting | Lovable hosting (lovable.app); self-host possible |
Bolt Cloud; Netlify integration; others via GitHub | Vercel | Vercel (guided GitHub → Vercel flow) |
| GitHub | Git sync on any plan; creates a new repo (no import of existing repos) | Sync, branches, import existing repos | Import repos; automatic branches and PRs | GitHub sync |
| Code export | ZIP download on paid plans; Git sync on all plans | Via GitHub sync or download | Export code; deploy elsewhere | Export every file |
| Pricing model | Credits, priced per workspace (not per seat) | Tokens, per user on Teams | Plan + usage credits, per user on team plans | Credits, monthly or annual plans |
Stack: how "Next.js" is each tool?
v0 says plainly that it "uses Next.js, React, TypeScript, Tailwind CSS, and shadcn/ui," and its docs point to Next.js patterns for things like internationalization. Since its February 2026 update, previews run in Vercel Sandbox, so server-side code, API routes and database connections work in the preview.
Massvai is built around one stack: a Next.js 15 project in TypeScript with Tailwind, Supabase for auth and data, and Stripe for payments. Its agent plans the work first and keeps the build visible in a live preview. Because the stack is fixed, you get fewer choices but a consistent project structure.
Bolt focuses on JavaScript web technologies: Node.js on the backend and any JavaScript framework on the frontend. You can ask for Next.js, but Bolt isn't tied to it. You can also get an Expo-compatible mobile app by putting "mobile app" in your first prompt. Bolt doesn't support Python or PHP backends.
Lovable is open about this: you can't choose a different framework such as Next.js. Apps created from May 13, 2026 use TanStack Start, which renders on the server. Older apps use React + Vite. If you need another stack, Lovable suggests syncing to Git and continuing outside Lovable. For many apps that's fine. For a team standardized on Next.js, it decides the question.
Deploy: where does the app live?
-
Lovable hosts your app for you. Publishing to a
lovable.appURL is free on all plans, and custom domains need a paid plan. You can also deploy to other hosting. - Bolt hosts every new project on Bolt Cloud, which Bolt says is powered by Netlify and Supabase and covers hosting, domains, databases, auth, file storage, server functions and analytics. You can also publish through the Netlify integration, or anywhere else via GitHub.
-
v0 deploys to Vercel with Publish. In GitHub-backed projects, Publish creates or reuses a pull request, merges it, and starts the production deployment. v0 never pushes directly to
main, and required checks still apply. - Massvai pushes the reviewed codebase to GitHub and deploys to Vercel through a guided one-click flow. Your app runs on your own Vercel project.
The real question is whether you want the builder to also be your host (Lovable, Bolt Cloud) or want deployments in an account you already control (v0 and Massvai on Vercel, or anything via GitHub).
Code ownership and portability
All four vendors say you can take your code with you, but the details differ:
- Lovable states that your apps, code and content are yours. Git sync works on any plan, and ZIP download needs a paid plan. One catch is that Git sync creates a new repository, so you can't start from an existing repo. Database data is exported separately.
- Bolt syncs commits to GitHub automatically, supports branches, and can import an existing repository as a new project. Merging branches happens on GitHub, not inside Bolt.
- v0 can import existing GitHub repositories, Vercel projects or ZIP files, and syncs with GitHub in both directions. Vercel's FAQ says it doesn't own the code generated from your prompts. The full experience assumes a connected Vercel project, but you can export and deploy elsewhere.
- Massvai lets you inspect and export every file and sync the repo to GitHub. Because it's a standard Next.js + Supabase project, you can keep developing in your own editor and pipeline.
If you might leave the tool later, a standard framework plus a GitHub repo you control matters more than any single feature.
Pricing model (not just price)
All four use usage-based units, but they count usage differently:
- Lovable uses credits. One workspace balance covers building, chatting, hosting, the built-in backend and in-app AI features. Plans are priced by credits, not seats, so adding teammates doesn't change the subscription. The Free plan includes 5 daily build credits, up to 30 a month.
- Bolt uses tokens. Bolt says most token use comes from syncing your project files to the AI, so larger projects use more tokens per message. Its pricing page lists a Free plan (1M tokens a month, 300K daily limit), Pro from $25 a month (starting at 10M tokens), and Teams at $30 per member a month. Paid tokens roll over one extra month.
- v0 combines a plan with usage credits, billed against per-model token rates. Its pricing page lists Free (7 messages a day), Plus at $30 per user a month with $30 of monthly credits, Business at $100 per user a month, and Enterprise.
- Massvai uses credits per agent generation. The Free plan includes 100 welcome credits with live preview and code export. Paid plans are Builder ($25 a month, 1,500 credits) and Pro ($49 a month, 4,000 credits, with Supabase setup help, version history and priority support).
Don't compare headline prices alone. The credit and token systems aren't equivalent, and the real cost depends on project size and how many iterations you need.
Best for: by scenario
"My team standardizes on Next.js and Vercel, and we work through pull requests."
→ v0. It's Next.js-first, imports existing repos, and its PR-based publish flow fits teams with code review and CI checks.
"I'm a founder who wants a SaaS skeleton (auth, database, payments) on a standard stack I can hand to a developer later."
→ Massvai. It starts with Next.js 15 + Supabase + Stripe, syncs to GitHub, deploys to your Vercel account, and exports every file.
"I don't care about the framework. I want the platform to handle hosting, database and payments."
→ Lovable. Built-in hosting, a managed backend, built-in payments and one credit balance mean fewer services to set up.
"I want framework flexibility, or a mobile app too."
→ Bolt. It supports a range of JavaScript frameworks, Node backends, Bolt Cloud or Netlify hosting, and Expo mobile apps.
"I already have a repo and want AI help on it."
→ v0 or Bolt, since both import existing GitHub repositories. Lovable currently doesn't.
"I'm budgeting a team."
→ Look closely at seat vs. pool pricing: Lovable prices by workspace credits, while v0 team plans and Bolt Teams are priced per user.
Final thoughts
These tools overlap less than their marketing suggests. Lovable and Bolt are full platforms that can host everything. v0 and Massvai produce Next.js code that deploys to Vercel. If Next.js is a requirement, that narrows the field quickly. Then decide whether you want an open-ended Vercel-native assistant (v0) or an opinionated Next.js 15 + Supabase + Stripe starting point you fully own (Massvai). The best test is to give the same product brief to two of them and see which output you'd rather maintain.
Sources: Lovable docs FAQ and pricing page; Bolt pricing page and support docs (Supported technologies, Bolt Cloud, GitHub); v0 docs, FAQ and pricing page; Massvai homepage. Checked October 2026.
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