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ronda vs Builder.io Fusion
Builder.io Fusion gives designers a visual canvas on top of your repo. ronda is the shortest path from "please change this" to a reviewed pull request.
Builder.io Fusion (now marketed as Builder Code) connects to an existing repository, runs your dev server, and combines a visual editor with AI prompting, Figma import and design-system indexing. Per Builder.io's public docs, it can deliver changes as pull requests when Commit Mode is set to "Pull Requests". ronda starts from the same place, an existing GitHub repository, but is narrower on purpose. A teammate describes a change in plain English or clicks Select element in a live preview of the real app to point at the exact button, heading or card, optionally attaches up to 3 images, and ronda opens a pull request your engineers review. ronda never merges or deploys, and every change is normal code in your existing components. Builder.io is the stronger pick when designers want a full visual canvas. ronda is the stronger pick when you want small and medium changes to reach review quickly on the app you already ship.
Side by side
ronda vs Builder.io Fusion
| Dimension | ronda | Builder.io Fusion |
|---|---|---|
| Primary job | Turn a plain-English request into a reviewed pull request on an existing app. | Visual editing, AI prompting and design-to-code on top of an existing repository. |
| Starting point | A GitHub repository you already own and run. | An existing repository, per Builder.io's public docs on GitHub, GitLab, Bitbucket and Azure DevOps. |
| How you point at a change | Describe it in plain English, click Select element in the live preview, or attach up to 3 images such as a screenshot or mockup. | A visual editor plus AI prompting, with Figma import for design-to-code. |
| Visual canvas | No. ronda is not a drag-and-drop page builder, on purpose. You point at an element in the live preview and describe the change. | Yes. A visual editing surface is central to the product. |
| Figma and design systems | You can attach a Figma export as an image. There is no Figma import or design-system indexing. | Figma import and design-system indexing, per Builder.io's public docs. |
| Runs your real app | Each session boots your real dev server in its own isolated sandbox VM. | Runs your dev server, per Builder.io's public docs. |
| How changes are delivered | Always a new branch and a pull request when you ask for one. ronda never merges, never pushes to your default branch and never deploys. | A pull request when Commit Mode is set to "Pull Requests", per Builder.io's public docs. |
| Code that gets written | Normal code in your existing components and styles, readable in a standard diff. | Changes are made in your repository. Check Builder.io's public docs for how visual edits and AI edits map to code. |
| Git hosts | GitHub only. | GitHub, GitLab, Bitbucket and Azure DevOps, per Builder.io's public docs. |
| What fits | Web apps that start with a Node dev server, such as Next.js, Vite and Astro, including monorepos and apps in a subfolder. One app per sandbox. | Check Builder.io's public docs for supported frameworks and project setups. |
| What does not fit yet | Frontends that need a separate backend started with docker-compose, and non-web repos such as mobile apps, Electron apps or smart contracts. | Check Builder.io's public docs for limits. |
| AI key | None from ChatGPT or Claude, where the assistant does the editing. In the web editor you connect your own model key, from Anthropic or any OpenAI-compatible endpoint, and pay your provider directly. ronda never marks up AI usage. | Credits-based AI usage, per Builder.io's public docs. |
| Pricing model | Free ($0: 3 projects, 1 sandbox, 1 collaborator). Starter ($9/month: 5 projects, 5 sandboxes per project, unlimited collaborators). | Per-seat plans with credits. Check Builder.io for current pricing. |
| Data handling | Your model key is encrypted at rest with AES-256-GCM and only its last four characters are shown back. In the web editor, instructions and relevant code go to the model provider you chose. ronda does not sell your data. | See Builder.io's security and privacy documentation. |
| Enterprise controls | ronda does not offer SSO today. | Check Builder.io's public docs for SSO, compliance and role controls. |
| Agent-drivable | An app in ChatGPT, and an MCP server that lets Claude, Cursor or any MCP-capable agent drive ronda end to end. | Check Builder.io's public docs for agent and API access. |
| Best fit | A PM, marketer or designer making small or medium changes to the app a small team already ships, with engineers reviewing every pull request. | A team whose designers want a full visual canvas with Figma-to-code and design-system awareness. |
We describe Builder.io Fusion as fairly as we can from its publicly documented behavior. If something here is out of date, email [email protected] and we will correct it.
ronda is the better choice when
- You want the shortest path from "please change this" to a reviewed pull request on the app you already ship.
- Small and medium changes are made by PMs, marketers or designers who describe the change or point at the element.
- Pull-request review must always be the gate: ronda never merges or deploys.
- You want flat team pricing: $9/month with unlimited collaborators on Starter.
- You want to use ronda from ChatGPT or Claude with no model key, or bring your own Anthropic or OpenAI-compatible key in the web editor.
Builder.io Fusion is the better choice when
- Your designers want a full visual canvas, Figma-to-code and design-system indexing.
- Your enterprise needs SSO, compliance documentation or role controls that ronda does not offer today.
- Your code lives on GitLab, Bitbucket or Azure DevOps rather than GitHub.
- You want visual editing as a first-class way of working, beyond pointing at an element.
Questions
What teams ask before switching
Is ronda a visual editor like Builder.io?+
No. ronda is not a drag-and-drop page builder. It does let you click Select element in the live preview of your real app and point at the exact button, heading or card you want to change, and you can attach up to 3 images such as a screenshot or a Figma export. The change is then written as normal code in your existing components and delivered as a pull request.
Do both tools open pull requests?+
ronda always works through a branch and a pull request when you ask for one, and it never merges or deploys. Per Builder.io's public docs, Builder.io can deliver changes as pull requests when Commit Mode is set to "Pull Requests". Check Builder.io for the other modes it offers.
What does the AI cost with ronda?+
ronda never marks up AI usage. From ChatGPT or Claude no model key is needed, because the assistant does the editing. In the web editor you connect your own model key, from Anthropic or any OpenAI-compatible endpoint, and pay your provider directly. Plans are Free at $0 and Starter at $9 per month with unlimited collaborators.
Which apps does ronda work with?+
ronda works with web apps that start with a Node dev server, such as Next.js, Vite and Astro, including monorepos and apps in a subfolder. Each preview runs one app in one sandbox, so frontends that need a separate backend started with docker-compose are not a fit yet, and neither are mobile apps, Electron apps or smart contracts. The free Repo analyzer at useronda.com/tools/repo-analyzer scores a public repo before you sign up.
Where do my code and keys go?+
Each session runs your app in its own isolated sandbox VM, and nothing runs on your infrastructure. ronda only works on a new branch, so your branch protection and reviewers stay in charge. Your model key is encrypted at rest with AES-256-GCM. In the web editor your instructions and the relevant code go to the model provider you chose, using your key. ronda does not sell your data.
See it on your own repo
Connect a GitHub repository, describe a change in plain English, and review the pull request ronda opens. The free plan needs no credit card.