Stream is a fast and scalable API designed for building social networks, activity feeds, and chat apps. It includes robust features like a Chat Messaging API, Activity Feeds API, and Video & Audio API, all of which are designed to ensure scalability and reliability. Stream also provides UI kits and tutorials to help you build rich social experiences, and offers several pricing plans to suit different needs, including a free tier for up to 100 MAU.
Another notable option is Waverly, which leverages conversational AI to facilitate meaningful interactions and community engagement. Users can create customized spaces called "waves" where they can connect with others who share similar interests. The AI system suggests content and tailors the feed to match user preferences, ensuring that users see relevant content and engage in useful discussions.