What are the best open source alternatives to Onlook?

The top open source alternatives to Onlook include WebStudio and Plasmic. These tools offer similar functionality while being free and open source.

Why choose an open source alternative to Onlook?

Open source alternatives provide transparency, community support, no vendor lock-in, and often cost savings. You can customize the software to your needs and have full control over your data.

Are these Onlook alternatives really free?

Yes, all listed alternatives are open source and free to use. You may need to pay for hosting if you self-host, but the software itself is free.

2 Best Open Source Onlook Alternatives in 2026

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:

Intuitive Visual Editor: Drag-and-drop interface for rapid prototyping and design.
Code-Level Control: Seamlessly switch between visual editing and direct HTML/CSS manipulation.
Responsive Design: Built-in tools for creating mobile-friendly layouts.
Component Library: Extensive collection of pre-built, customizable components.
Real-time Collaboration: Work together with team members in real-time.
Version Control: Built-in versioning system for easy tracking and rollbacks.
Export Options: Generate clean, optimized code for various hosting platforms.
Performance Optimization: Automated tools for improving website speed and efficiency.

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.

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:

Data connectors for Supabase, Contentful, Shopify, and any HTTP or GraphQL API endpoint
Figma import to turn designs into production React components without manual translation
Custom component library so your design system stays consistent across every project
Branching and multiplayer for teams working in parallel without stepping on each other
Fine-grained permissions to control who can view, edit, or publish within Plasmic and inside your app
On-premise deployment for organizations that need to keep everything behind a firewall
SOC 2 compliance and SSO support for enterprise security requirements

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.