Design and diagrams
Brono alternatives
2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.
The projects
nexu-io/open-design★85,140 GitHub starsApache-2.0 licenceLocal-first design app that generates prototypes and exports HTML/PDF/PPTX/MP4 from prompts.Open on GitHub ↗OpenCoworkAI/open-codesign★7,704 GitHub starsMIT licencePrompt-driven prototype generator that creates slides, PDFs, and interactive prototypes using multiple LLMs.Open on GitHub ↗
What you give up either way
- Custom trained audit & design engine tuned to a company design system
- Deep MCP integrations and plug-and-play connectors mentioned on the site
- Enterprise features (SSO/SCIM, dedicated infra, SLA)
- Polish, reliability, and UX of the vendor-hosted studio
- Predictive heatmap quality from a proprietary model and ongoing model improvements
An open-source project doing the core job proves a replacement is possible. It does not prove it matches Brono, and it does not prove anyone has run it for a month. How we decide.