How to Multistream to Twitch, YouTube, Kick and TikTok at Once

The Rules on Each Platform (September 2026)

All four platforms allow multistreaming. What differs is the fine print, and the fine print is where accounts get warnings or lose income. Checked against each platform's own terms and help pages on September 26, 2026.

Twitch: the simulcasting guidelines

Twitch opened simulcasting to all streamers, Affiliates and Partners included, in late 2023. The rule sits in section 11 of Twitch's Terms of Service and has three conditions: the experience on Twitch must be no worse than on the other platforms, including how you engage with Twitch chat; you must not post links or otherwise push your community to leave Twitch for the other stream; and you must not use third-party services that merge activity from other platforms, such as chat, into your Twitch stream. Twitch's simulcasting FAQ draws the promotion line at actively advertising the other live stream. A normal social link to your YouTube or Kick channel in your panels is fine; “come watch on YouTube instead” is not.

The merged-chat condition changed in practice, not on paper. In February 2026 Twitch warned the streamer Gigguk for showing combined YouTube and Twitch chat. Days later, on Twitch's Patch Notes stream, CEO Dan Clancy said Twitch was updating its enforcement guidelines so it would no longer act against combined chat on the stream video, as Gaming Careers reported. The Terms of Service text still contained the merged-chat line when we checked it on September 26, 2026, and you remain responsible for anything from another platform's chat that appears on your Twitch video.

YouTube: the only one with an official how-to

YouTube publishes a “Stream across platforms” help article that treats multistreaming (“simulstreaming” in its wording) as a normal workflow. Its checklist: a verified channel with live streaming enabled (the first enable takes at least 24 hours), accounts in good standing on every other platform, enough upload for all streams combined, and a choice between a local encoder and a cloud relay. Our YouTube go-live guide covers the channel setup.

Kick: free to multistream, but Partners pay for it

Kick lets you stream anywhere, but its help center (updated May 22, 2026) sets a rule for the Kick Partner Program: if you are also live on another long-form platform such as Twitch or YouTube, you must turn on the Multistreaming toggle, found under the Partner Income toggle in your dashboard, or type /multi on in chat. While it is on, your payout is cut by 50%. Streaming to vertical or short-form platforms such as TikTok LIVE, YouTube Shorts or Instagram Live does not need the toggle, and multistreaming without it when it is required breaches the Partner terms. For the rest of the Kick setup, see how to stream on Kick.

TikTok LIVE: the stream key is the gate

Going LIVE from the TikTok app needs no key, but that stream cannot be sent anywhere else. To multistream, you build the stream in OBS or a relay and push it to TikTok with a server URL and stream key, and TikTok does not publish a single public rule for who gets one. Its LIVE Studio help says access depends on account age, recent LIVE time and follower count, that the thresholds vary by country, and that streamers from other platforms can apply by submitting details of their existing channel. You also have to be 18 or older to go LIVE.

If you plan to stream to TikTok through a relay, Restream's TikTok help page adds two details: TikTok asks for your main channel link and average concurrent viewers when you apply, and since July 7, 2025 it expects at least 50% of your content to be gaming to keep third-party streaming access. Everything else about getting LIVE on TikTok is in how to go live on TikTok and the TikTok LIVE Studio guide.

Three Ways to Multistream

There are only three architectures, and the difference between them is where the copying happens: on a server, on your PC, or on your PC with two separate canvases.

1. Cloud relay: Restream, StreamYard, Castr

You send one stream to the relay's server and it forwards a copy to every connected platform. Your PC and your connection carry exactly one stream whether you reach two platforms or eight, which makes this the answer for laptops and limited upload. The costs: a monthly fee once you pass the free tier, and one extra server hop between you and the viewers.

1. 1Create a Restream account and connect your channels (Twitch, YouTube, Kick…) in the dashboard. For a platform without a direct login, add it as a custom RTMP destination with that platform's server URL and stream key.
2. 2Copy Restream's RTMP server URL and stream key.
3. 3In OBS, open Settings → Stream, set Service to Custom…, paste the server and key, and press Apply.
4. 4In Settings → Output, set one bitrate for the single stream, CBR rate control and a 2-second keyframe interval, which both YouTube and Kick recommend.
5. 5Set the title and category on each platform, then press Start Streaming and check every channel.

Prices below are monthly billing as listed on each vendor's pricing page on September 26, 2026. Restream keeps your original resolution on every plan when you stream from OBS; its 720p/1080p split only applies to its browser Studio. For more services and a side-by-side view, see our multistreaming services comparison.

2. OBS plugins: Aitum Multistream and obs-multi-rtmp

OBS on its own still streams to one service at a time (version 32.2 is current). Its “multitrack video” feature sends several quality versions of your stream to Twitch for Enhanced Broadcasting; it does not send to several platforms. For that you add a plugin, and both established ones are free. If OBS itself is new to you, start with the OBS setup guide.

• Aitum Multistream (version 1.0.8, updated May 18, 2026; Windows, macOS and Linux; OBS 30 or newer). Install it, open the Aitum Multistream dock, choose Main Outputs, click Add Output, pick the platform (or Other Service for a custom server) and paste the server and key. Each output can reuse your main encoder (Built-in stream) or run its own. If it reuses the main encoder, start your main stream first or the extra output refuses to start. It pairs with Aitum Vertical, which adds a separate vertical canvas with its own Vertical Outputs.
• obs-multi-rtmp (open source, latest release August 2026; download the build that matches your OBS version). It adds a Multiple output dock: click Add new target, enter the server and key, and set the encoder to Reuse the streaming encoder as OBS when the platform takes the same settings. Tick Sync start with OBS so every target goes live with the main Start Streaming button, or use Start all.

Set your main OBS stream (Settings → Stream) to your primary platform and add the rest as plugin outputs. The trade-off versus a relay is upload: every output is a full extra stream leaving your connection, which the bandwidth table below puts into numbers.

3. Dual output and the hardware side

A dual-output setup encodes two different pictures, a 16:9 layout and a 9:16 layout, and sends each to its own platform. Streamlabs Dual Output does one horizontal and one vertical platform for free; in OBS the same thing is Aitum Vertical plus Aitum Multistream. It is covered in its own section below.

On the hardware side, the rule is simple: an output that reuses the main encoder costs upload but almost no extra processing, and an output with its own encoder costs both. Use a hardware encoder (NVIDIA NVENC, AMD or Intel) for anything beyond one stream, and watch codecs. Kick accepts only H.264 at up to 1080p60, while YouTube also takes HEVC and AV1, so a shared encoder only works if it outputs something every platform accepts. Standalone hardware encoders and streaming boxes fit the same model: point them at a relay's server URL and the relay does the copying. For per-platform encoder settings, use the bitrate and encoder cheat sheet.

Bandwidth Math: How Much Upload You Need

The formula comes from YouTube's own multistreaming help: add up the bitrate of every stream that leaves your PC, then have 1.5 to 2 times that in upload for stability. With a cloud relay only one stream leaves your PC. With plugin outputs, every platform adds its full bitrate.

Reference points for picking bitrates: YouTube recommends 12 Mbps for 1080p60 in H.264 (6 Mbps for 720p60), Kick caps ingest at 8,000 kbps, and Twitch's June 2026 update raised Enhanced Broadcasting to up to 7.5 Mbps at 1080p and 9 Mbps at 1440p. You do not have to max any of them. One 6 Mbps stream looks fine everywhere and keeps the math small.

Horizontal and Vertical at the Same Time

Sending a 16:9 gameplay stream to TikTok gives you a letterboxed strip in the middle of a phone screen. The fix is a second canvas with its own 9:16 layout: webcam on top, the important part of the game below, text kept away from the edges. Three ways to get there:

• Twitch Dual Format. Since June 17, 2026 every Twitch streamer can send a horizontal and a vertical layout at once; mobile viewers get the vertical view inside the same broadcast, and clips and VODs come in both formats. It runs on Enhanced Broadcasting, where your PC encodes several versions of the stream, and Twitch adds server-side transcoding for Partners and many Affiliates to lighten that load. Because Enhanced Broadcasting is built for the OBS-to-Twitch connection, keep Twitch as your main OBS stream and send other platforms as plugin outputs. Step-by-step setup: Twitch Dual Format guide.
• OBS with Aitum Vertical and Aitum Multistream. Free. Your horizontal canvas goes to Twitch, YouTube or Kick; the vertical canvas goes to TikTok through a Vertical Outputs entry with your TikTok server and key.
• Streamlabs Dual Output or Restream. Streamlabs sends one horizontal and one vertical platform for free. Restream offers dual-format output from its Professional plan ($49/mo).

A vertical TikTok stream alongside your Kick stream does not trigger Kick's Multistreaming toggle, because Kick exempts vertical platforms. A second horizontal stream to Twitch or YouTube does.

Unified Chat: Reading Every Platform in One Place

Multistreaming fails on chat more often than on video: a viewer on the platform you are not watching asks a question, gets no answer, and leaves. Pick one way to see every message and keep it next to your preview.

Reading a merged chat privately has never been a problem. Showing one on the Twitch video is what the written rule targets, and Twitch has said it will not enforce it; the side-by-side boxes option removes the question entirely. Whatever you show, moderation carries over: a slur typed in YouTube chat that appears on your Twitch overlay is on your Twitch stream. Give each platform its own moderators and use a chat tool with filtering.

Choosing a Multistreaming Service: What Actually Matters

• Simultaneous destinations on the plan. The number that decides the price. Count the platforms you will realistically use, not the 30 a service can connect to.
• Branding on the free tier. Restream and StreamYard free plans carry their branding; check whether it lands on your video or only on their studio.
• Resolution passthrough. Does the service forward what you send, or cap it? Restream keeps your original resolution from OBS on every plan.
• Custom RTMP destinations. Needed for any platform without a direct login and for a TikTok stream key.
• Vertical or dual-format output. Only matters if TikTok is on your list, and it moves you up a plan on Restream.
• Unified chat and cloud recording. Both save you a separate tool.
• Guests. If you run interviews, a browser studio (StreamYard, Restream Studio) replaces a separate call tool.

Pitfalls That Catch Most Multistreamers

• Different delays on every platform. Each platform buffers differently, so a question from one chat can arrive after you have moved on elsewhere. On YouTube you can shrink the gap in YouTube Studio → Create → Go live → Stream settings → Stream latency; YouTube says most viewers see under 10 seconds on Low latency and under 5 seconds on Ultra-low, at the cost of more buffering. Answer questions by name so viewers on a delay know which message you mean.
• Platform-exclusive features. Channel points and Hype Trains exist only on Twitch, Super Chat only on YouTube. Twitch requires its viewers get an experience no worse than elsewhere, so do not run giveaways or interactive segments that only one platform can join.
• Titles and categories. Every platform needs its own. Kick's help center warns that a stream without a title and category may not start correctly.
• TikTok key access. Build your setup after you have a key, not before; approval can take days and can be revoked if your content mix changes.
• Kick Partner payout. Forgetting the toggle is a terms breach; turning it on halves the session's payout. Decide per stream, not by habit.
• Lag and dropped frames. Open Docks → Stats in OBS. Dropped frames are the network, so lower bitrates or move to a relay. Skipped frames are encoding load, so reuse the main encoder or switch to hardware encoding. More fixes in the stream optimization guide.
• Not watching your own output. Open your Twitch, YouTube and Kick channels side by side in Multiwatch during a test stream to check audio, sync and quality on each platform at once.

Which Method Should You Use?

Start with two platforms, not four. Multistreaming is also an experiment: after a few weeks, compare average viewers and chat activity per platform (public Twitch, YouTube and Kick channel stats are on Streams Charts) and decide which one is home. If that decision is Twitch versus YouTube, the trade-offs are laid out in YouTube vs Twitch.