KoalaSync

Privacy-first, self-hostable browser extension for synchronized video watch parties on any site.

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KoalaSync is a free, open-source, privacy-first browser extension and relay server for synchronized watch parties on nearly any site with a video element, including Netflix, Emby, and Jellyfin, which lack native sync features. It runs on a zero-persistence, RAM-based relay with no session logs, usable via the official hosted relay or fully self-hosted via Docker. It's aimed at friends who want to watch video together remotely on platforms without built-in sync, with an option for full data control via self-hosting.

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Problem & pain-point mapping
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