Aitum Multistream: The New Standard for Free Multistreaming in OBS
Ever wondered how creators go live on Twitch, YouTube, and TikTok at the same time?
As livestreaming becomes the go-to way to engage, 28.4% of global internet users now watch live video weekly (Statista, 2024). But your audience isn’t just on one platform—Twitch holds 61% of the market, while YouTube Gaming and Kick split most of the rest.
That means if you’re only streaming to one platform, you’re missing out—recent creator data shows that simulcasting can bring in up to 6x more viewers than sticking to just one platform. (Restream, 2024). The good news? Aitum Multistream makes it free and easy—right inside OBS. 👉 In this guide, I’ll walk you through:
What Is Aitum Multistream? (aka The Best OBS Multistream Plugin Right Now)
Aitum Multistream is a free plugin for OBS Studio that lets you stream to multiple platforms—like Twitch, YouTube, TikTok, and Facebook—simultaneously, right from your desktop. No third-party services, no monthly fees, no cloud encoding middleman.
Think of it as your own personal multistream server that lives inside OBS. It even lets you:
- Stream to each platform at different resolutions (4K to YouTube, 720p to Twitch)
- Send separate audio tracks to different platforms (e.g., background music only to Twitch)
- Run vertical and horizontal streams side by side (great for TikTok or YouTube Shorts)
It's made by the same devs behind Aitum Vertical Plugin, so if you've used that before, you're in good hands.
How to Use Aitum Multistream in OBS (Step-by-Step for Beginners)
Aitum Multistream is a powerful new OBS plugin designed to make multistreaming easy, fast, and free. It lets you broadcast to Twitch, YouTube, Facebook, TikTok, and more — all at the same time, directly from OBS without any middleman servers. Here’s how to get started:
1. Download and Install Aitum Multistream
- Search for Aitum Multistream on Google or visit the official download link.
- Download the installer, which is straightforward and quick to set up.
- After installation, restart OBS Studio.
- Once restarted, you’ll see a new dock called Aitum Multistream in OBS. If not visible, go to View > Docks > Aitum Multistream to enable it.
2. Set Up Your Base Stream in OBS
- Before adding multiple platforms in Aitum, configure your primary stream the usual way:
- Open Settings > Stream in OBS.
- Choose your main platform (e.g., Twitch, YouTube, Facebook).
- Enter the Stream Key and configure encoding settings as you normally would.
- It’s recommended to set Twitch as your primary platform, as other streams piggyback off this base stream by default (more on this later).
3. Add Additional Platforms in Aitum Multistream
- Open the Aitum Multistream dock.
- Go to Main Outputs.
- Add other platforms by entering their Stream Keys. For example, if Twitch is your base, add your YouTube account here.
- Aitum provides direct links to each platform’s stream key page for easy access.
- Paste your stream keys carefully and save.
4. Understand Piggyback Streaming & Independent Streams
- By default, secondary streams (e.g., YouTube) piggyback on your base stream (e.g., Twitch). This means the quality and settings are mirrored.
- You must start the base stream first; otherwise, you’ll get an error.
- If you want different quality or settings on other platforms, you can configure independent streams by changing the Main Encoder in the advanced settings of each platform inside Aitum.
- Note: Independent streams use more CPU/GPU resources since OBS encodes separately for each platform.
5. Manage Audio Tracks for Different Platforms
- OBS supports up to 6 audio tracks. You can assign different audio to each track.
- Use the Advanced Audio Properties in OBS to route specific audio tracks to different platforms.
- For example, you might want to play copyrighted music on Twitch but mute it on YouTube to avoid copyright claims.
- In Aitum, when Twitch is your primary platform, you can take advantage of its VOD track for separate audio, but secondary platforms don’t support this feature yet.
6. Go Live on Multiple Platforms
- Once all platforms are configured and ready, simply click Go Live on the Aitum Multistream dock.
- You can select which platforms to stream to and start broadcasting simultaneously.
- Monitor your stream quality and PC performance to ensure smooth delivery.
7. Streaming to Vertical Platforms (TikTok, YouTube Shorts)
- Aitum Multistream supports vertical streaming via the Aitum Vertical plugin.
- Set up vertical streams separately by adding stream keys for vertical formats.
- For YouTube, you need to create a new stream key for vertical streams before each broadcast in your YouTube dashboard.
- This allows simultaneous horizontal and vertical streams.
Tips and Notes
- Since Aitum sends streams directly to each platform, a fast and stable internet connection is essential.
- No middleman means no extra subscription costs — it’s completely free!
- You can stream to multiple accounts on the same platform (e.g., several Twitch or YouTube channels).
- Using independent streams offers better quality control but requires more PC power.
- Stay updated on upcoming Twitch vertical streaming support, which Aitum plans to fully support.
Aitum Vertical Plugin + TikTok Streaming = Win
If you’re targeting mobile platforms like TikTok, YouTube Shorts, or Instagram Live, vertical streaming is a must. The Aitum Vertical plugin works seamlessly with Aitum Multistream, allowing you to run a second vertical canvas inside OBS.
This means:
- You can stream in both 16:9 and 9:16 at the same time
- Each format can have different overlays, layouts, and branding
- Vertical viewers see a fully optimized version, not a cropped mess
You just need to add a second stream key to the vertical output, and you’re ready to go live in both orientations.
Why the Aitum Plugin Beats other Multistream Platforms
Don’t get me wrong—Restream, StreamYard, and Switchboard Live are great tools, especially for people who don’t want to mess with OBS.
But Aitum wins for serious streamers who want:
- Zero monthly fees
- Direct streaming (no added latency or third-party servers)
- Full quality control (bitrate, audio, resolution per platform)
- Vertical + landscape control in one place
If you’ve got the bandwidth and the gear, Aitum is hands-down the best free multistreaming plugin for OBS right now.
Pro Tip: Better Gear = Smoother Streams
OBS multistreaming—especially when sending different formats to different platforms—is demanding on your CPU, GPU, and upload bandwidth.
To keep things smooth:
- Use hardware encoding (like NVENC on NVIDIA GPUs)
- Close background apps
- Consider upgrading your setup
Need a gear boost? I use the NearStream VM20 4K camera for plug-and-play sharpness, and the VK40 green screen kit to keep my background crisp and professional—perfect for vertical content too.
FAQs: Multistreaming with Aitum and OBS
Q1: Is Aitum Multistream really free? Yes! 100% free. No subscriptions, no hidden fees.
Q2: Do I need the Aitum Vertical plugin to stream on TikTok? Yes, for vertical layouts you’ll need the Aitum Vertical plugin.
Q3: Can I stream to YouTube and Twitch in different resolutions? Absolutely. You can set unique resolutions, bitrates, and audio for each platform.
Q4: What if my internet isn’t fast enough? Try using just two platforms, lower your bitrate, or use a service like Restream that sends only one upload from your PC.
Q5: What platforms does Aitum support? Almost everything: Twitch, YouTube, Facebook, TikTok, Kick, LinkedIn, and more.
