What Is Kosmi and What Can You Do on It?

Updated

Kosmi is a free, browser-based watch party and virtual hangout platform. You can sync Netflix, YouTube, or other streaming video with friends while using built-in voice, video, and text chat—no download or sign-up required. It fits long-distance friends, couples, remote teams, or anyone who wants a shared online room for movie nights, game nights, or casual co-presence. The platform also supports games, music, shared browsing, screen sharing, link sharing, and file sharing, so it can replace juggling several separate services for one gathering.

Core uses

Kosmi groups several social activities into one room. According to the site, the main uses are:

  • Watch parties — Host movie nights with Netflix, YouTube, or any streaming service, with playback synced across participants.
  • Games — Play built-in online games such as poker, 8 Ball Pool, shuffleboard, mini golf, Four Colors, cornhole, Blast Arena, Kosmic Kart, Cards Against Humanity, and retro console parties (SNES, NES, PSX, OpenArena).
  • Music and video chat — Add music and talk over voice, video, or messaging while watching or playing.
  • Shared browsing and screen sharing — Browse together, share your screen, or pass links and files inside the room.
  • Custom rooms — Design private rooms with themes like a virtual living room, drive-in, games room, coffee shop, or pub. You can create multiple rooms and invite different groups to each.

If you are flying solo, the site says you can check public rooms in the lobby or invite a community you already belong to.

How to start a session

The flow is intentionally lightweight. Based on the site’s description:

  1. Launch Kosmi in your browser. No download or sign-up is required to jump in.
  2. Create or enter a room. You can customize a private room or browse public rooms in the lobby.
  3. Invite friends with a link. Sharing the room link is the main invitation method described.
  4. Add what you want to do together. Start a synced video, open a game, share your screen, or upload a file.
  5. Talk while you hang out. Voice, video, and messaging are integrated in the room.

A mobile app is available for on-the-go hangouts, but the site recommends desktop or tablet for the full experience.

What you need to know before choosing it

Consideration What the site says
Cost Free to use; no credit card needed. An optional Premium tier exists for extras.
Account No sign-up required to jump in and invite friends with a link.
Installation No download; works in the browser. A mobile app is also available.
Streaming support Integrates with popular streaming services, including Netflix and YouTube.
Room customization Private rooms can be themed and multiplied for different groups.
Best device Desktop or tablet recommended for the full experience.

Who it is for

Kosmi is a reasonable fit if you want one link that handles synced video, chat, and optional games without asking everyone to install software or create accounts. It is less suited if you need a formal meeting tool with scheduling, recording, or enterprise controls—the site positions it around casual watch parties, game nights, and virtual hangouts rather than work meetings.

The platform is backed by founders Haukur Rosinkranz and Jim Rand, with support reachable at support[at]kosmi.io.