Best open-source alternatives to Webflow

ShareX is a Windows-focused screen capture and file sharing tool aimed at users who need to quickly create, edit, and distribute screenshots or recordings as part of a productivity workflow. The project presents itself as more than a simple capture utility by combining capture actions, image effects, OCR, and upload integrations in one desktop application. The README points users to the project's website and documentation pages for topics such as keybinds, scrolling screenshots, command-line arguments, translation, custom uploaders, and cloud storage guides. It also highlights the project's ecosystem of downloadable builds and community links, suggesting an actively maintained desktop application with broad sharing and automation features.

Onlook is an open-source, visual-first code editor aimed at helping people craft websites, prototypes, and designs with AI. It focuses on Next.js and TailwindCSS projects, letting users start from scratch, from text or image prompts, or from prebuilt templates, then edit the resulting app visually in the browser. The project is designed for builders who want a tighter connection between design and code. Its editor supports real-time preview, direct DOM editing, code-side navigation, checkpoint-based saving, branching for experimentation, and deployment-oriented features like shareable links and custom domains. The README also indicates a web-based product with local development support, backed by a stack that includes Supabase, tRPC, Bun, Docker, and multiple AI/model providers.

Webstudio is presented as an open-source visual development platform aimed at developers, designers, and cross-functional teams. It is positioned as a product that lets users build visually while retaining ownership of their data, components, and infrastructure. The README indicates that the project can be used as a hosted service or self-hosted by rolling out one’s own instance. It also points readers to documentation, design resources, contributing guides, community discussions, and project tracking links, suggesting an active ecosystem around both usage and contribution. The license section further shows that the core is open source under AGPL-3.0-or-later, while one optional package is proprietary.