Fusion
One codebase for engineers, designers, PMs, and marketers. Everyone works from one source of truth, on brand and in code, with no handoffs to clean up.
Fusion launched on June 18, 2025 with 297 votes, #96 of 7,999 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Fusion is a developer tool that connects to GitHub repositories and uses AI to generate production-ready UI code based on your design system and APIs. It automates the workflow by opening branches, creating pull requests, and providing live previews for each change, allowing developers to work at any scale. The tool is designed for teams looking to streamline their code generation and UI development process.
written from the facts on this page · September 2026
From the sources
Fusion links directly to your GitHub repos and learns your design system and APIs, then uses AI to generate and visually edit production-ready UI code in place. It opens a branch, pushes a PR, and spins up a live preview for every change.
Create real product experiences that stay on brand, in code, and ready to ship. Everyone works from the same source of truth, with the context they need and no handoffs to clean up later. Code in Builder or your AI tool of choice, then push the branch so designers, PMs, and QA can polish pixels, edit copy, and run tests in the real app. Every change uses your code and design system, so it comes back cleaner and closer to merge. Try new directions, refine layouts, and ship polished UI in the real product with your design system already wired in. The details you obsess over stay intact all the way to production. Act on customer feedback, stakeholder requests, and experiment ideas from Slack…from builder.io
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