A technically distinctive in-browser AI app builder held back by unpredictable token costs and AI-only support.
Bolt.new is StackBlitz's AI-powered app builder that turns natural-language prompts into running full-stack web applications inside the browser. It uses WebContainers, StackBlitz's own in-browser Node.js runtime, so generated code installs dependencies and runs live without a remote server round-trip. The free plan works for testing ideas; paid plans add more tokens, custom domains, and a Supabase-backed "Bolt Cloud" backend.
Type a natural-language prompt describing the app you want; Bolt's agent plans the build before writing code.
The agent writes files, installs npm packages, and starts a dev server, all inside a WebContainer running in your browser tab.
A live preview, code editor, file tree, and terminal update in real time; you can edit code directly or keep prompting.
Connect Bolt Cloud for a Postgres database, authentication, storage, and edge functions, powered by Supabase.
Publish the site; paid plans remove Bolt branding and add a custom domain, and you can keep prompting or editing as requirements change.
AI synthesis of external reviews · not on bestaiq
Synthesized from 4 external reviews. Independent signal (Trustpilot / Reddit / verified aggregators) weighted higher than commission-carrying review sites.
Yes, there is a free plan with 1 million tokens per month and a 300,000-token daily cap. Paid plans start at $25 per month for individuals and $30 per month per member for teams.
Bolt Cloud is Bolt.new's built-in backend offering. It is powered by Supabase and gives generated projects a Postgres database, authentication (including SSO and row-level security), file storage, and edge functions.
Bolt.new is Claude-only. Historically it let users pick between named Claude models such as Haiku, Sonnet, and Opus; more recently it has moved to two agent tiers, Standard and Max, that select the underlying model automatically. A separate open-source fork called bolt.diy supports many other providers, but that is a different project from the hosted bolt.new.
StackBlitz's privacy policy says it may use inputs and outputs to improve its AI, but only on aggregated, anonymized, or de-identified data, and states an opt-out is available depending on account type or plan. The exact mechanics of that opt-out are not detailed on the page.
We did not find a verified, widely reported data-loss incident. There is one documented status-page incident in March 2026 involving database ownership claims, which the company says did not affect actual data, plus scattered individual user reports on Trustpilot and Reddit about the AI agent deleting project files. Those user reports are unverified single accounts, not confirmed platform-wide events.
The official pricing page states up to 28% savings with annual billing. Two third-party sites instead cite a 10% discount, and we could not test the live billing toggle ourselves this session, so treat the exact annual price as unconfirmed until checked directly on bolt.new.
Bolt.new offers a technically distinctive way to build full-stack apps by running Node.js directly in the browser, with a genuine free tier and a Supabase-backed database layer. Reviewers consistently flag token-cost unpredictability and AI-only support as the main friction points, and some of the more negative third-party ratings and the exact annual-billing discount could not be independently confirmed. Test it on the free plan before committing to Pro or Teams.