Question: How can I add real-time collaboration features to my app without having to rewrite it from scratch?

Liveblocks is a developer toolkit that streamlines the addition of high-performance collaboration abilities. It includes features like presence, broadcast, comments, sharing and document browsing, all of which are deeply integrated with common frontend frameworks. With a variety of pricing plans, including a free starter plan, Liveblocks lets developers concentrate on their core product while Liveblocks handles the complexities of real-time collaboration.

Ably is a full-featured real-time digital experience platform with APIs for live chat, data broadcasting, data synchronization, multiplayer collaboration and more. It has libraries for multiple clients and servers and has strong security and reliability features. Ably's pay-as-you-go and committed use pricing plans accommodate different levels of demand, making it a good fit for a wide range of industries.

For a simpler integration, Velt has a JavaScript SDK that includes commenting, co-editing, real-time feedback and video walkthrough abilities. It works with different tech stacks and web frameworks, so it's good for tools like video editors and task managers. Velt emphasizes ease of use, security and support so developers can get collaborative abilities up and running quickly.