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KoalaSync
Sync Netflix, Emby & more perfectly. Free & open-source.
KoalaSync perfectly synchronizes video streams across multiple devices. It works universally with Netflix, YouTube, and any HTML5 player, but was specifically built to support self-hosted servers like Emby, Jellyfin and Plex. No accounts, no tracking. Features include TV show auto-syncing and smart tab matching. It's 100% free, open-source, and you can even self-host the WebSocket relay server for complete data privacy.
Hey Product Hunt 👋
I got incredibly frustrated that established watch-party tools completely ignore self-hosted media servers like Emby, Jellyfin or Plex. So, I decided to scratch my own itch and built my own alternative: KoalaSync.
It's a free, privacy-first browser extension that perfectly syncs video streams in real-time.
What makes it different?
🌍 Universal: Works on Emby, Plex, Netflix, YouTube, Twitch & pretty much any HTML5 video.
🚫 Frictionless: Absolutely no accounts, sign-ups, or databases. Just generate a room link and share it.
💻 Self-Hostable: It works out of the box, but you can also completely self-host the real-time WebSocket backend yourself via Docker.
✨ QoL Features: Handles TV show auto-syncing (waits for everyone before playing the next episode) and smart tab matching.
I built this to be as lightweight and strictly private as possible. I'd love to hear your feedback or answer any questions you might have. Let me know what you think!
About KoalaSync on Product Hunt
“Sync Netflix, Emby & more perfectly. Free & open-source.”
KoalaSync was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #36 on the daily leaderboard. KoalaSync perfectly synchronizes video streams across multiple devices. It works universally with Netflix, YouTube, and any HTML5 player, but was specifically built to support self-hosted servers like Emby, Jellyfin and Plex. No accounts, no tracking. Features include TV show auto-syncing and smart tab matching. It's 100% free, open-source, and you can even self-host the WebSocket relay server for complete data privacy.
On the analytics side, KoalaSync competes within Browser Extensions, Chrome Extensions, Open Source and GitHub — topics that collectively have 167.8k followers on Product Hunt. The dashboard above tracks how KoalaSync performed against the three products that launched closest to it on the same day.
Who hunted KoalaSync?
KoalaSync was hunted by KoalaDev. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of KoalaSync including community comment highlights and product details, visit the product overview.
KoalaDev