Bolt

Bolt (bolt.new) is developed by StackBlitz, the venture-backed company behind WebContainer browser technology, with co-founder Eric Simons among its leadership. The product launched publicly in October 2024 and grew explosively — reaching around $20 million in ARR within two months and surpassing 2 million registered users.

Bolt has continued to expand beyond pure code generation into a fuller platform, adding Bolt Cloud for backend infrastructure and emphasizing larger project context handling, automated error reduction, and design-system-driven, production-oriented output. The company positions Bolt as a professional building tool that adapts to a range of roles rather than a single audience.

At its core, Bolt converts natural-language prompts into complete, deployable full-stack projects within a live in-browser environment. A coding agent generates project structure and code, then tests, refactors, and iterates to reduce errors, while automatic model routing selects an appropriate model per task to balance quality and cost. A higher-capability tier is available for more demanding work, and the platform is built to handle substantially larger projects than earlier versions.

Bolt Cloud extends the product into backend territory, providing hosting, unlimited databases, user management and authentication, analytics, file storage, custom domains, and SEO optimization inside one interface. This lets builders ship a working, hosted product without assembling separate services.

Bolt also supports importing from Figma and GitHub and building against established design systems and brand component libraries, so teams can produce on-brand, production-oriented interfaces rather than generic scaffolds.

Bolt serves a broad set of product-building roles rather than a single developer niche. Its primary segments include entrepreneurs and startup founders launching MVPs, product managers prototyping concepts, marketers spinning up campaign and landing pages, agencies scaling delivery, and students or indie builders learning by shipping. Custom enterprise plans extend the reach to organizations that need enterprise-grade backend infrastructure and dedicated terms.

Bolt is a product of StackBlitz, which is venture-backed (not bootstrapped). StackBlitz has raised roughly $135M in total, including a $105.5M Series B in January 2025 led by Emergence Capital and GV (with Madrona, Greylock, Insight Partners, and Conviction), at a reported ~$700M valuation, following an earlier ~$22M Series A. Bolt's growth has been among the fastest ever for a software product — from $0 to about $20M ARR within two months of its October 2024 launch and roughly $40M ARR by March 2025, with over 5 million registered users. The company has pushed hard into enterprise: in May 2026 it added a Microsoft Azure/Microsoft 365 partnership, and Bolt reports that a majority of the Fortune 500 now use the platform.