Bolt.new: our review

Bolt.new generates a complete web application — frontend, backend, database — from a description in natural language, and runs it directly in the browser through WebContainer, the technology built by StackBlitz. No installation, no server to rent for the preview: the code runs in a Node.js environment compiled to WebAssembly, client-side. That technical detail is what sets Bolt.new apart from a simple generator that shows a static preview.

What it actually does

You describe an application in the chat — a quote configurator, a stock-tracking dashboard — and Bolt.new writes the full project, installs it, runs it and shows a preview within seconds. Each following message picks up the existing project and applies the requested change: changing a component, connecting a database through Bolt Database, adding a page. Running in the browser means you can work from any machine with no local setup, a real advantage for an SME that wants to test an idea without tying up its IT department.

Where the code goes, and how to get it back

Bolt.new claims no ownership over the code it produces: StackBlitz states this explicitly in its terms of service, which specify that it claims no rights over data or content submitted by the user. The project can be synced two ways with a GitHub repository, which lets you continue development in a regular IDE, deploy somewhere other than Bolt's infrastructure, or simply keep a copy outside the platform. That's the condition for this kind of tool to go beyond a throwaway prototype: a project stuck inside the browser loses all its value the moment it needs to grow as a team effort.

What an iteration costs

Bolt.new bills by the token, the unit of measure for any language model, not by a flat-rate message. The documentation spells it out: most of the consumption comes from syncing the project's file system to the AI on every message — the bigger the project, the more tokens even a minor exchange costs. The free tier caps at 300,000 tokens a day and 1 million a month, with a "Bolt" mention visible on the published site. The Pro plan, at $25 a month, starts at 10 million tokens a month, which roll over to the following two months if unused. Beyond that volume, a top-up is still possible, but its exact price depends on the subscription tier and only shows up at the point of purchase — impossible to budget in advance without already being a customer.

Where it falls short

Two reservations. First, the token-based model mechanically penalises projects as they grow: a one-line fix on a fifty-file application costs more than the same fix on a five-file project, since the entire context gets resynced with every message. Second, rolling back with version history restores the code, not the tokens already spent on the messages that led to that state: a failed iteration is billed the same as a successful one, and the documentation mentions no goodwill gesture in that case.

Our recommendation

Bolt.new suits a developer or small team who wants a prototyping environment they can access with no installation, and who syncs to GitHub as soon as the project deserves to be picked up seriously. See also our selection of app-generation tools. Skip it if the project is already large: the cost per message climbs with the project's size, not with the complexity of the task asked of it.