Replyke is an open-source framework that aims to deliver a robust social layer for both web and mobile applications, equipping developers with pre-built APIs, SDKs, and UI components for features such as comments, feeds, notifications, user profiles, follow graphs, voting, and moderation, thus eliminating the need to create these functionalities from the ground up. With a headless and TypeScript-first architecture, it allows for effortless integration into various existing tech stacks, whether they are hosted on-premises or in the cloud. Developers can easily implement threaded comment systems that include features like mentions, votes, replies, and GIF support; customize their feeds using filters for tags, metadata, follows, or timeframes; and set up in-app notifications for significant events such as mentions or follows. Moreover, they can create curated user lists, manage one-way follow relationships, and utilize built-in moderation tools along with administrative dashboards for efficient content and report management. The framework is compatible with React and React Native right out of the box, providing hooks and components, and it also grants full API access for those seeking more tailored server-side implementations. Overall, Replyke significantly streamlines the development process by offering essential social features in a cohesive package.