The best open source alternative to Instapage is Onlook. If that doesn't suit you, we've compiled a ranked list of other open source Instapage alternatives to help you find a suitable replacement. Other interesting open source alternatives to Instapage are: WebStudio, Plasmic, Silex, and Frappe Builder.
Instapage alternatives are mainly Low-Code/No-Code Platforms but may also be Website Builders or Frontend Development Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Instapage.
Onlook is an open-source desktop app that allows you to visually edit React applications and automatically write changes back to your code in real-time.

Onlook brings the power of visual editing to React development, similar to how Webflow works for web design. This innovative tool allows developers to:
Key features:
Onlook is perfect for developers who want to streamline their workflow, designers who wish to contribute directly to React projects, and teams looking to bridge the gap between design and development.
Get started with Onlook today and experience a new way of building React applications that combines the best of visual design and coding.
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.
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.
Build web apps, internal tools, and customer portals fast with visual editing, drag-and-drop design, and seamless codebase integration. Deploy anywhere without limits.

Plasmic is an open-source visual editing platform that lets you build websites and applications at remarkable speed. Unlike traditional no-code builders, it integrates directly with your existing codebase, giving you complete flexibility without being locked into a walled garden.
Key capabilities include:
Perfect for building: internal tools, customer portals, SaaS applications, e-commerce storefronts, content-managed websites, and custom experiences. The platform scales with your organization while letting you maintain control over your technology stack and deployment environment.
An online tool for visually creating static sites with dynamic data. With the free/libre spirit of internet, together.

Silex is a powerful open-source website builder that enables designers and no-code developers to create stunning responsive websites visually, without writing code.
Key features:
Silex stands out by combining the ease of no-code tools with the flexibility and control of open-source software. Designers can create custom, professional-quality websites efficiently, while developers can extend functionality as needed.
The platform embraces modern web standards and static site generation for fast, SEO-friendly websites. With its focus on freedom and customization, Silex is an excellent choice for agencies, freelancers and businesses who want full control over their web projects without sacrificing ease of use.
Frappe Builder is an open-source, low-code website builder that enables users to create beautiful, responsive websites with an intuitive visual interface.

Frappe Builder is an innovative open-source website builder designed for simplicity, speed, and flexibility. It empowers users to craft beautiful websites effortlessly using an intuitive visual interface.
Key features of Frappe Builder include:
Frappe Builder bridges the gap between design and publishing, offering a seamless experience for both designers seeking ease of use and developers requiring customization. Whether you're creating a simple landing page or a complex website, Frappe Builder provides the tools to bring your vision to life quickly and efficiently.
Built on the Frappe Framework, this tool combines the power of a full-stack low-code framework with an accessible website creation process. It's ideal for businesses, developers, and individuals looking to establish a professional web presence without the complexity of traditional web development.
Build, manage, and host custom websites with a visual drag-and-drop builder and CMS. Self-host free or use managed cloud hosting.

Ycode is a visual website builder and CMS that gives you full control over your site's design, content, and infrastructure. It's aimed at designers, founders, and agencies who want the polish of a tool like Webflow without being locked into a closed platform.
The self-hosted version is completely free and open source. You get full code access, custom domains, unlimited pages, unlimited CMS items, unlimited users, and unlimited form entries. No usage caps, no vendor lock-in. If you'd rather skip the infrastructure work, a managed cloud option handles hosting, CDN delivery, and updates automatically.
Key capabilities include:
For agencies, a white-label workspace lets you run Ycode under your own domain with multi-user access and unlimited cloud projects bundled in.
Compared to other open source website builders or headless CMS tools, Ycode stands out by combining the visual design layer and content management in one place, rather than splitting them across separate tools. Users migrating from closed platforms cite GDPR compliance and community responsiveness as practical reasons for switching.
The self-hosted path deploys to Vercel with Supabase as the database backend, keeping your stack on infrastructure you already control.