The best open source alternative to Onlook is WebStudio. If that doesn't suit you, we've compiled a ranked list of other open source Onlook alternatives to help you find a suitable replacement. Other interesting open source alternative to Onlook is Plasmic.
Onlook alternatives are mainly Low-Code/No-Code Platforms but may also be Frontend Development Tools or Website Builders. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Onlook.
Powerful no-code platform for building responsive websites. Combines visual editing with full HTML/CSS customization.

WebStudio revolutionizes web development by bridging the gap between visual design and code-level control. This innovative platform empowers both designers and developers to create stunning, responsive websites without compromising on flexibility or performance.
Key benefits of WebStudio include:
WebStudio is perfect for freelancers, agencies, and in-house teams looking to streamline their web development process. Whether you're building a simple landing page or a complex web application, WebStudio provides the tools and flexibility to bring your vision to life efficiently and professionally.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Open-source visual editor for building websites and web apps. Connect to any data source, design custom UIs, and ship production React code without leaving your stack.

Plasmic is a visual builder and content platform for teams that want to move fast without abandoning their existing codebase. Unlike tools such as Softr or Glide that keep you inside a walled garden, Plasmic generates real React code and integrates directly into your current applications. No iframes, no lock-in.
It's built for mixed teams. Developers can register their own components as drag-and-drop building blocks, then hand the canvas over to designers, marketers, or product managers who can build and publish without filing a ticket. The result is fewer bottlenecks and a smaller backlog.
Key capabilities include:
Plasmic covers a wide range of use cases: internal tools, customer portals, SaaS products, storefronts, and content-heavy marketing sites. Tools like AppSmith and Builder overlap on internal tools, but Plasmic's Figma-to-code workflow and deep React integration make it a stronger fit for teams that also ship public-facing products.
The free plan has no time limit, and self-hosting is available for teams that need full infrastructure control.