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Bolt.new (StackBlitz)
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TaglineRun any open-source AI model with an API call.Prompt to deployed full-stack app in the browser.Vector + raster AI for designers. Actually controls the output.
CategoryDev PlatformCodingImage
PricingPay per second of computeFree + $20-$200/moFree + $12-$48/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).PMs, founders, non-devs shipping MVPs.Designers, brand teams, anyone needing vector output or tight style control.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Less hyped than Midjourney
  • Learning curve for non-designers
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Best for fast prototypes. Competitive with Lovable — try both.S-tier for designers. The only one that takes vectors seriously.
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