Prototyping Speed vs Production-Ready Apps
Both tools are good at different jobs. Here is the short version.
| Feature | Fabricate | Bolt.new | Winner |
|---|---|---|---|
| AI Code GenerationBoth generate code from prompts | Yes | Yes | Tie |
| Generation SpeedBolt is optimized for speed | Yes | Yes | Bolt.new |
| Database IncludedBoth include one; Bolt lets you swap it, Fabricate defines the tables in your source | Durable Object SQLite, tables in your source | Bolt Database or your own Supabase | Tie |
| User AuthenticationBoth ship authentication without setup | Built-in: PBKDF2, cookie sessions | Bolt Cloud auth | Tie |
| Payment IntegrationOn both, the AI writes Stripe code against your own Stripe account; on Fabricate you add your own keys, which only the published app receives | Yes | Yes | Tie |
| Start From an Existing Design or RepoBolt imports from Figma and from GitHub; Fabricate starts projects rather than joining them | No | Yes | Bolt.new |
| Browser Check Before PublishingAn app that crashes, never mounts or renders a blank page is blocked from publishing | Opened in a real browser | Not documented | Fabricate |
| Runtime MeteringBolt bills for what the deployed app does; Fabricate meters only the build | None | Bolt Cloud usage | Fabricate |
| Code ExportBoth export your code; neither exports the managed backend behind it | Yes | Yes | Tie |
Bolt.new made a splash in the AI development space by prioritizing one thing above all else: speed. It generates working code from prompts faster than almost any competitor, making it the go-to tool for developers who need to quickly visualize an idea or create a demo. That speed-first philosophy has earned it a loyal following, particularly among developers who use prototypes as communication tools.
What has changed, and what most comparisons have not caught up with, is that Bolt is no longer a frontend generator. Bolt Cloud is a first-party backend documented as covering databases, authentication, file storage, secrets, email, server functions, user management, hosting with analytics, and domains. So the real distinction between these two tools is not whether a backend is included. It is how open each one is, and where the backend ends up living.
Bolt is the more open of the two, and deliberately so. It is one of very few builders that will start from something you already have, importing from Figma and from GitHub rather than insisting on a blank prompt. Supabase is documented as an alternative to Bolt Database and Netlify as an alternative to Bolt hosting, so either half of the stack can be swapped out, and Expo is the documented route to the app stores. Fabricate does none of that: it starts projects rather than joining them, and it targets one stack.
Fabricate is the more integrated. It generates against a single vertically integrated stack -- React 19 and TypeScript on the front, server routes in a Durable Object on Cloudflare Workers, and that Durable Object's built-in SQLite database -- so the database, the API and the deployment are produced together by the same system and are consistent by construction. The build is deployed to a live preview as it is written, and the AI can read the browser's console errors from that preview and fix them as it works. Before an app can be published it is opened in a real browser and the render is classified as crashed, never mounted, blank, unstyled or fine; an app that crashes, never mounts or renders a blank page is blocked from publishing.
Pricing differs in structure. Bolt meters tokens while you build and Bolt Cloud usage while the app runs, and documents unused tokens carrying into the following month while a paid subscription stays active. Fabricate meters credits against the AI work that builds the app, with nothing metering the traffic it later serves, and every tier gets identical model access -- plans differ in credit allowance and per-generation ceiling, not in which models you may use.
Which tool is best for your specific use case?
Bolt.new excels here, and more so if the brief already exists as a Figma file, because Bolt can import it rather than starting from a description. For a demo that has to exist by this afternoon, its generation speed is hard to beat and the fidelity of the starting point matters more than what is underneath.
Closer than it used to be, and Fabricate still has the edge. Both give you user accounts, data persistence and hosting now. The MVP-specific difference is the meter: an MVP that finds traction keeps drawing Bolt Cloud usage, while Fabricate credits are spent on building. The browser check before publishing also matters more here than at demo stage, because a real user landing on a blank page is a churn event rather than a laugh.
Fabricate has the edge for e-commerce, and payments are the reason. Bolt Cloud covers the product catalogue and customer accounts perfectly well; what it does not generate is the checkout. Fabricate's AI writes the Stripe code -- checkout sessions, webhook handling, order state -- as part of the same application; you add your own Stripe keys, which only the published app receives, so the first transaction is a test rather than a project.
Bolt.new's speed advantage makes it better for pure UI iteration -- quickly trying different layouts, color schemes, or component arrangements. Fabricate can also iterate on UI through conversation, but each generation includes the full stack, making pure design iteration slightly slower.
| Metric | Fabricate | Bolt.new |
|---|---|---|
| What the First Generation Produces | Full stack: UI, API, and database schema together | Full stack, with Bolt Cloud behind it |
| Can Start From an Existing Design or Repo | No -- starts projects rather than joining them | Yes -- imports from Figma and from GitHub |
| Where the Backend Lives | Durable Object and SQLite code in your generated source | Bolt Cloud, a managed service |
| Swappable Infrastructure | No -- one Cloudflare stack by design | Yes -- Supabase for the database, Netlify for hosting |
| Browser Check Before Publishing | Opened in a real browser; crashed, unmounted or blank apps are blocked | Not documented |
| Meters You Pay | One: credits for the build | Two: tokens to build, Bolt Cloud usage at runtime |
Tokens against credits is mostly a presentation difference; neither unit tells you what a feature costs until you have built something similar once. Two things underneath matter. Bolt documents unused tokens carrying into the following month while a paid subscription stays active, which beats an allowance that simply expires. Against that, Bolt Cloud usage is a second meter for what the deployed app does, where Fabricate meters only the AI work that builds it. Fabricate tiers differ in credit allowance and per-generation ceiling, never in model access. Current Fabricate plans, credit allowances, and publishing limits are listed on the pricing page at fabricate.build/pricing; check Bolt's own page for theirs, because published rates in this category moved more than once during 2026.
Both tools produce a working tool from this prompt: Bolt against Bolt Cloud, Fabricate against its own stack. What differs is what you are holding at the end. Fabricate writes the SQLite tables for tasks and workspaces, the API routes, the auth checks that keep one team out of another team's board, and the attachment handling into a repository you can download as a zip. Bolt Cloud does the equivalent job as a service you configure, which is faster to reason about on day one and stays behind on Bolt if you ever leave.
Build a project management tool with kanban boards, team assignments, due dates, file attachments, and activity logs. Include user authentication with team workspaces.
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