
Adding community to your app used to mean building everything from scratch: messaging protocols, feed algorithms, moderation pipelines, real-time infrastructure. That’s months of engineering before users see a single feature. Community SDKs exist to compress that timeline. They give your team pre-built components, native integrations, and APIs that handle the hard parts so you can ship social features without rebuilding what already exists. But the SDKs on the market cover very different ground. Some handle chat. Some handle video. Some cover the full stack. This guide compares five, what each is built for, and how to choose the right one for your app.