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Open beta · free

Gather your community

Multichat, OBS widgets, video requests on stream and AI posts from news for Telegram and Discord. Everything that brings viewers around your stream, in one place.

Start for freeWhat Koster does
People gathered around a campfire at night listening to a storyteller, the way a streamer gathers a community

What Koster does

Six tools in one dashboard. Turn on the ones you need, the rest stay out of the way.

Stream multichat

Koster’s multichat brings stream messages and events into one feed. Keep it in its own window on a second monitor and reply to viewers right from it. Twitch, YouTube and VK Video connect today.

  • Subs, gifts, raids and bits stand out in the feed
  • Channel point rewards come with the viewer’s text
  • Reply in chat as yourself, no Twitch tab needed
  • The same chat on your scene through an OBS widget
Learn more

AI news autoposting

Subscribe to game news on Steam and on developer websites. Koster picks up every new item, AI translates it and formats it into a post, and you approve it in the Inbox or let it publish right away to your Telegram channel and Discord server.

  • Sources: a game’s Steam page or a website’s news section
  • AI translates to Russian and formats the post with a headline and lists
  • Long patch notes become a series of posts by topic
  • One source to several channels, with a delivery log

Planned: post templates with your own signature and style.

Learn more

Video requests on stream

A viewer spends Twitch channel points and sends a YouTube or VK link. Koster checks the video, adds it to the queue and plays it in a player on your OBS scene. Koster creates the Twitch rewards itself when you open requests.

  • Manual approval and limits on video length, views and queue size
  • An OBS dock: pause, skip, seek, approve
  • Points are refunded if a request is declined or the video fails to start
  • Request history: replay a video or refund points

Planned: requests through donation services and song requests.

Learn more

OBS widgets

A Koster widget is a link for a Browser source in OBS. It shows chat on top of your game or reads messages and rewards aloud. Change the settings on the site and they show up on stream right away, no new link needed.

  • On-screen chat: theme, text size, background, how messages appear
  • Filters: bots, “!” commands, banned words
  • Text-to-speech: voice, speed, volume, a chime before each message
  • Several widgets for different scenes

Planned: alerts for subs, raids and rewards, and new voices, including AI voices.

Learn more

Go-live announcements

When your Twitch stream starts, Koster posts an announcement to your Telegram and Discord with the title, game and link. Followers learn about the stream without you posting by hand.

  • Triggered by your Twitch stream going live
  • Pings the right role in Discord
  • Separate channels for announcements and news
Learn more

Desktop overlaySoon

An app for Windows and macOS that shows chat right on top of your game. Handy when there is no second monitor and you need to read viewers without leaving the game.

  • The window lets clicks through and stays out of the game’s way
  • The chat look comes from your Koster widgets
  • Tray icon and hotkeys
Learn more

Get started

  1. Log in with Twitch

    Or with Discord or Telegram if you only need posts.

  2. Pick what to set up

    Live tools, posts or both. The setup wizard takes a couple of minutes.

  3. Add the link to OBS or connect a channel

    Chat and requests show up on stream, posts reach your followers.

Start for free

Questions and answers

How much does Koster cost?

Koster is free during the open beta. Paid plans will come later, and we will announce them in the dashboard in advance.

Which platforms does Koster work with?

Multichat and the chat widget bring together Twitch, YouTube and VK Video, and video requests work with Twitch. Posts and announcements go to Telegram and Discord. You can log in with Twitch, Discord or Telegram.

How do I add Koster chat to OBS?

Create a widget under “OBS widgets”, copy the link and paste it into a Browser source in OBS. After that you change the chat’s look on the site, no new link needed.

How do video requests on stream work?

When you open requests, Koster creates a Twitch reward. A viewer pays with points and sends a YouTube or VK link, the video joins the queue and plays in the OBS player. If the request is declined or the video fails to start, the points are refunded. Requests through donation services are planned.

Do I need to install anything?

No. The dashboard runs in the browser and widgets go into OBS as a link. The desktop overlay app is only needed if you want chat on top of your game.

How does news autoposting work?

You subscribe to a game’s news on Steam or a website’s news page and pick your channels. Koster picks up every new item, AI formats it into a post, and the post waits for your approval or goes out right away.

Does it work with YouTube and VK Video chat?

Yes: connect your channel by link and its messages arrive in the same multichat feed and the same OBS widget. To reply from Koster, connect the channel through Google or VK.

Where is my data stored?

Koster’s servers are in Russia, and data is processed under Russian personal data law (152-FZ). Text is sent to external services for AI post formatting and text-to-speech. The privacy policy has the details.

How do I contact the Koster team?

Write to the email in the site footer. We answer questions, bug reports and beta feedback.

Bring your people to the fire

Koster is free during the beta. All you need is a Twitch, Discord or Telegram account.

Start for free