Bolt.new is an AI app builder made by StackBlitz, a company known for running development environments inside the browser. It launched in October 2024. Users describe an app, and Bolt writes the code, installs packages and runs it in a live preview.
Bolt runs on StackBlitz's WebContainers technology, so the whole project runs in the browser tab without a remote server. Users can keep changing the app by chat or edit the code directly. It supports common web frameworks and can build mobile apps with Expo. Apps can be published with one click, and projects can be linked to GitHub and Supabase. Users can also import designs from Figma to start a project.
There is a free plan with a daily token limit. Paid plans give more tokens, private projects and custom domains. Bolt is used by founders, designers and developers who want a working first version quickly. StackBlitz is based in San Francisco.