Kast Has Shut Down — Pick Up Right Where You Left Off

Kast Shut Down?
Switch to Kosmi.

Now that Kast is gone, Kosmi picks up right where it left off. Watch Netflix, YouTube, Disney+, HBO, Plex and more with friends in perfect sync — with screen share and video chat, in your browser or the native iOS and Android apps. Same experience you knew on Kast, still online, plus built-in games.

Create a Free Room Kosmi vs Kast
✓ 100% Free ✓ Built-in Games ✓ No Sign-Up Required ✓ Works on Any Device
📢

Kast has shut down. Your watch parties don't have to.

If you're here because Kast - Watch Together closed down, Kosmi is the stable, actively developed home to move to. It works the same way — synced video with friends in your browser or the iOS and Android apps, with screen share and video chat — plus built-in multiplayer games. Bring your movie nights over in minutes.

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Synced Watch Parties
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Built-in Games
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Voice & Video Chat
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Screen Share
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Works in Browser
Why Switch?

Kosmi vs Kast

Kast and Kosmi work the same way — browser-based watch-together with native iOS and Android apps, synced streaming, screen share and chat. Now that Kast is gone, Kosmi is the closest living replacement: still actively built, with multiplayer games on top.

Kosmi Kosmi

  • ✓ Online and actively developed, with regular updates
  • ✓ Works in your browser, plus native iOS & Android apps
  • ✓ Netflix, YouTube, Disney+, HBO, Hulu, Prime, Twitch, Plex & almost any site
  • ✓ Built-in voice and video chat in every room
  • ✓ Screen sharing built in (HD on Premium)
  • ✓ Dozens of built-in multiplayer games (Poker, CAH, retro consoles)
  • ✓ Shared virtual browsers, open any URL, custom room themes
  • ✓ Share a link — guests join without an account
  • ✓ Free to use, with an optional Premium tier

K Kast

  • ✗ Shut down — no longer available
  • ✗ No more updates, support or new features
  • ✗ Your saved rooms and watch parties are gone
  • ✗ No built-in games to play between movies
  • ★ Everything else it did, Kosmi still does
Features

Everything Kast Had — Still Online

Kosmi keeps everything you loved about Kast — synced watch parties, screen share, video chat — and adds built-in multiplayer games. One room, one link, everything synced.

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Synced Watch Parties

Watch Netflix, YouTube, Disney+, HBO Max, Hulu, Amazon Prime, Twitch, Plex, Google Drive videos and almost any website together — frame-accurate sync, just like Kast.

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Voice & Video Chat

Every Kosmi room comes with built-in voice and video chat. See and hear your friends react in real time while the movie plays — no extra call on Discord or FaceTime needed.

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Screen Share

Just like Kast, you can share your screen with the whole room — a local video file, a website, a game, anything. Standard screen share is free; higher resolutions are available on Premium.

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Built-in Games

Between movies, jump straight into Poker, Cards Against Humanity, drawing games, NES/SNES/PlayStation classics and more — all multiplayer, all in the same room.

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One Link to Join

No app installs, no friction. Share your room link in iMessage, WhatsApp, Discord, Snapchat — friends tap and they're in. Works on iPhone, Android, Mac, Windows, Linux.

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Private by Default

Your rooms are private. Only people with the link can join, and you can lock the room any time. No randoms, no spam — just your friends.

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Virtual Browsers

Spin up a shared virtual browser right inside the room. Co-browse any website together, sign in to sites, or watch something that won't embed — all in sync, with nothing to install.

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Open Any URL

Drop in almost any link — a streaming site, a YouTube video, a Google Drive file, an image or a plain webpage — and it loads right inside the room for everyone, perfectly synced.

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Room Themes

Make the space yours. Customize your room with themes so movie night, game night and your everyday hangouts each get their own look and feel.

How It Works

From Kast to Kosmi in 30 Seconds

No new account for everyone. Same flow you knew on Kast. Just open Kosmi and you're already most of the way to a watch party.

1

Create a Room

Click the button. Your room is ready instantly — no sign-up needed.

2

Share the Link

Send your friends the room link. They join in one tap from any device.

3

Pick Something to Watch

Open Netflix, YouTube, Disney+, Plex or any site inside the room. Everyone's synced.

Create a Room Now
Use Cases

Why Kast Users Are Moving to Kosmi

The same kinds of hangouts you used Kast for — only better, on more devices, with more to do.

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Movie Nights

Sync up Netflix, Disney+, Hulu, HBO or your own Plex library and watch with friends. React together with built-in voice and video chat.

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Long-Distance Date Nights

Pick a movie or YouTube playlist, hop on video chat, and spend the evening together — even when you're an ocean apart. The best Kast alternative for couples.

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Anime & Show Marathons

Long anime arcs, K-drama binges, comfort-show rewatches — everyone in perfect sync, with chat off to the side so you can talk without spoiling for late joiners.

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Music & YouTube Hangs

Queue up YouTube music videos, live concerts, podcasts or TikToks together. Just like a Kast watch party, but in a browser and with voice chat on.

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Game Nights

Something Kast didn't have: built-in multiplayer games. Poker, Cards Against Humanity, drawing games, retro consoles — all without leaving the room.

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Cross-Platform Friend Groups

Half your friends on iPhone, half on Android, one on a Chromebook? With Kosmi it doesn't matter — everyone joins from a browser link and sees the same room.

FAQ

Kast Alternative FAQ

The most common questions from people moving from Kast to Kosmi.

What is the best alternative to Kast? ▼

Kosmi is the best Kast alternative in 2026. It works just like Kast did — a browser-based watch-together app with native iOS and Android apps — letting you watch Netflix, YouTube, Disney+, HBO Max, Hulu, Amazon Prime, Plex and almost any streaming service together in perfect sync, with screen share and video chat. The big differences: Kosmi is still online and actively maintained, and every room has built-in multiplayer games.

Has Kast shut down? ▼

Yes — Kast (Kast - Watch Together) has shut down, leaving its users without a watch-together app. Kosmi is a stable, actively developed replacement that works the same way: watch parties in your browser or the iOS and Android apps. You can move your movie nights and watch parties over in minutes.

Is Kosmi like Kast? ▼

Yes, very much so. Like Kast, Kosmi runs in your web browser and also has native iOS and Android apps. You get the same synced watch parties — Netflix, YouTube, Disney+, HBO Max, Plex and more — plus screen share and video chat. The main differences: Kosmi is still online and actively maintained, and it adds dozens of built-in multiplayer games you can play between movies.

Can I watch Netflix together on Kosmi like I did on Kast? ▼

Yes. Kosmi supports synced playback of Netflix, YouTube, Disney+, HBO Max, Hulu, Amazon Prime Video, Twitch, Plex, Google Drive videos and almost any website with a video on it. Everyone in the room watches at the exact same moment, and you can react with voice chat, video chat or text in real time.

Is Kosmi free? ▼

Yes. Create unlimited rooms, invite anyone with a link, watch together, voice chat, screen share and play games at no cost. Like Kast, Kosmi has an optional Premium tier that unlocks extras such as higher-resolution screen share and bigger rooms, but everything you need for a classic Kast-style watch party is free.

Can I play games with friends on Kosmi too? ▼

Yes. This is a major thing Kosmi adds on top of the Kast experience. Every room has dozens of built-in multiplayer games — Poker, Cards Against Humanity, drawing games, retro consoles (NES, SNES, PlayStation), and more. Watch a movie, then jump straight into a game without leaving the room.

How is Kosmi different from Kast? ▼

Kast and Kosmi are very similar — both are browser-based watch-together apps with native iOS and Android apps, synced streaming, screen share and chat. The difference that matters now is that Kast has shut down while Kosmi is actively maintained — and Kosmi adds extras Kast never had: built-in multiplayer games, shared virtual browsers, the ability to open almost any URL in the room, and custom room themes.

Lost Kast? Start Fresh on Kosmi.

Create a free Kosmi room and bring your friends over in seconds. No sign-up, the same watch-together experience you had on Kast — plus games, and it's still online.

Get Started Free

Why Kosmi Is the Best Kast Alternative

If you're searching for a Kast alternative, a Kast replacement, or you just found out that Kast shut down, you're in the right place. Kosmi is the watch-together app for the post-Kast era — the same kind of experience you had on Kast, built for synced video with friends, and still online and actively maintained.

An Actively Developed Kast Replacement

The reason so many people are now looking for an alternative to Kast is simple: the app has shut down. Kosmi is a stable, actively maintained product backed by a team that ships updates regularly. You don't have to wonder whether your watch-party app will still be there next week — and moving over takes minutes.

The Same Browser-Based Experience

Like Kast, Kosmi runs in any modern browser — Chrome, Safari, Firefox, Edge — and also offers native iOS and Android apps. There's nothing new to learn: open a link and you're in the room, just like you did on Kast. Watch together, screen share, and chat by voice or video, all in one place.

Watch Netflix, YouTube and More Together

As a Kast alternative for Netflix, YouTube and beyond, Kosmi supports a wide catalog of services: Netflix, YouTube, Disney+, HBO Max, Hulu, Amazon Prime Video, Twitch, Plex, Google Drive videos, Vimeo, Dailymotion and effectively any site with a video on it. Everything stays in perfect sync for the whole room.

Voice, Video and Screen Share — Just Like Kast

Kosmi gives you chat, voice, and video, plus screen sharing — all in one room, the same way Kast did. Standard screen share is free, with higher resolutions available on Premium. No more juggling a separate Discord call on the side just to see each other's reactions while you watch.

Games and Hangouts, Not Just Watch Parties

One thing Kast didn't offer is what makes Kosmi more than a like-for-like Kast app alternative: built-in multiplayer games. Poker, Cards Against Humanity, drawing games, retro NES/SNES/PlayStation classics — all playable right in the room, with no installs. When the movie ends, the hangout doesn't have to.

Virtual Browsers, Any URL, and Room Themes

Kosmi goes further than Kast in a few more ways. Shared virtual browsers let your whole group co-browse any website together — sign in, fill forms, or watch something that won't normally embed, all in sync. You can open almost any URL inside the room, from streaming sites to YouTube, Google Drive files, images and plain webpages. And with room themes, you can customize how your space looks so every kind of hangout feels its own way.

The Easiest Way to Bring Your Kast Friends Over

Switching is painless. Create a Kosmi room, copy the link, and drop it in whatever chat you're already using — iMessage, WhatsApp, Discord, Snapchat, Telegram. Your friends tap the link and they're in — they don't even need an account to join. Kosmi is the Kast alternative built to get your group back together fast.

The Best Kast Alternative for 2026

Whether you're a longtime Kast user left stranded by the shutdown, a couple in a long-distance relationship, a group of friends scattered across time zones, or just someone who wants to watch something with another human tonight — Kosmi is the modern, browser-based Kast alternative built to last. Try it free.