Liveblocks

Liveblocks belongs in the catalog because collaborative state has become part of modern product infrastructure, especially in AI products where users and copilots increasingly work inside the same document, canvas, or workspace. The official site positions Liveblocks around realtime infrastructure, comments, notifications, pre-built components, AI collaboration, and AI copilot workflows. That makes it more relevant than a generic websocket vendor entry; it is product infrastructure for collaborative interfaces.

It also deserves inclusion because the pricing model is straightforward and unusually well-documented. Liveblocks publishes a free tier, a $30/month Pro plan, a $600/month Team plan, explicit overage metering on monthly active rooms, and separate add-on prices for SOC 2 report access, version history, SAML, and HIPAA. That level of packaging detail is strong editorial material for teams budgeting collaborative app features.