Velt

Velt is a developer toolkit that lets you add collaborative features directly into your existing web application. Instead of building real-time commenting, multiplayer editing, or notification systems from scratch, you can use Velt's SDK and pre-built React components to integrate these features. It works by providing a set of tools that you add to your product's frontend, enabling users to comment on specific elements, see each other's cursors, and communicate without leaving your app.

The toolkit is designed for developers who want to ship collaboration features quickly. It offers different components that mimic popular patterns from tools like Figma (canvas comments), Google Sheets (cell comments), Frame.io (video comments), and Slack (huddles). You get a free API key to start, and the components are customizable to match your product's design. The focus is on reducing development time for common interactive features that keep users engaged.

This is most useful for B2B SaaS companies and product teams building web applications where user collaboration is important. If you have a dashboard, documentation portal, video editor, CMS, or canvas-based tool, Velt can help you add features that let users work together inside your product. The goal is to keep conversations and collaboration happening within your app, rather than forcing users to switch to external communication tools.