How to Multistream with OBS: Plugin vs Relay Service (August 2026) Guide

If you want to broadcast one live stream to Twitch, YouTube, Facebook, and TikTok at the same time, OBS Studio alone won’t get you there out of the box. The official app sends a single RTMP output to one destination. So when I needed to stream to four platforms simultaneously for a recent gaming tournament, I had two real options: install an OBS plugin that adds multiple RTMP outputs, or route my stream through a relay service like Restream. Both work. They just cost different amounts of money, bandwidth, and patience.

This guide breaks down how to multistream with OBS using both approaches. I’ll walk through the actual setup for each method, share what broke when I tested them, and give you a clear recommendation based on your bandwidth, hardware, and budget.

Table of Contents

• What Is OBS Multistreaming and Why Use It
  • Why Multistream with OBS Studio
  • The Two Main Approaches
• Method 1: Multistream with an OBS Plugin (Local Encoding)
  • What the OBS Plugin Method Does
  • Step-by-Step Setup for obs-multi-rtmp or Aitum
  • Pros and Cons of the Plugin Method
• Method 2: Multistream with a Relay Service (Cloud Encoding)
  • How a Relay Service Works
  • Step-by-Step Setup for Restream and Similar Services
  • Pros and Cons of the Relay Method
• Plugin vs Relay Service: Direct Comparison
  • Bandwidth and Hardware Requirements
  • Quality and Reliability
• Will Twitch or Other Platforms Ban You for Multistreaming?
• Free vs Paid Multistream Options in 2026
• Frequently Asked Questions
  • What is the best way to multistream in OBS?
  • Does OBS allow multistream for free?
  • What is the best free multistream plugin for OBS Studio?
  • Will Twitch ban me for multistreaming?
  • Which is better for multistreaming, Aitum or Restream?
  • Is multistreaming a good idea?
• Conclusion

What Is OBS Multistreaming and Why Use It

OBS multistreaming means pushing a single live broadcast to multiple streaming destinations at the same time. Without it, you would need separate OBS instances or a second encoder for each platform. Both eat CPU, RAM, and upload speed you probably do not have to spare.

Why Multistream with OBS Studio

Three reasons drove me to set this up for my own channel, and they line up with what the OBS Project forum discussions keep circling back to.

• Reach more viewers without doubling your workload. One stream, multiple audiences.
• Survive a single platform outage. If Twitch drops your feed, YouTube is still live.
• Test new platforms without abandoning your main one. Great for branching into Kick, TikTok Live, or LinkedIn.

The Two Main Approaches

There are only two real architectures for multistreaming in OBS. The plugin method adds local encoding: your PC pushes copies of your stream to each platform directly. The relay method sends one stream to a cloud service that handles the rest. Everything else is a variation on these two themes.

Method 1: Multistream with an OBS Plugin (Local Encoding)

The plugin method is the most popular way to multistream with OBS for free. Popular plugins like obs-multi-rtmp and Aitum Multistream add extra output targets directly inside OBS Studio. You click “Start Recording” once, and the plugin pushes your stream to every destination you configured.

What the OBS Plugin Method Does

Plugins like obs-multi-rtmp add a dock to OBS Studio where you can configure multiple custom RTMP outputs. Each output has its own stream key, ingest URL, and bitrate settings. The plugin sends a copy of your already-encoded stream to every target without re-encoding.

This is the part the marketing pages skip: the plugin method still pushes every stream from your machine. If you stream at 6 Mbps to four platforms, your upload has to handle 24 Mbps. That is the single biggest gotcha for new users, and it is why forum threads on r/obs keep warning about bandwidth caps.

Step-by-Step Setup for obs-multi-rtmp or Aitum

1. Download the plugin. Get obs-multi-rtmp from the official OBS Project forum or Aitum Multistream from its GitHub page. Both are free and open source.
2. Install it. Drop the files into your OBS Studio plugin directory and restart OBS.
3. Open the multistream dock. In OBS, go to Docks and enable the new multistream dock. Aitum adds a separate window called “Aitum Multistream.”
4. Add your first destination. Click “Add new target” and pick a platform. Twitch, YouTube, Kick, Facebook, TikTok, and custom RTMP are all supported.
5. Paste your stream key. Grab the stream key from each platform’s creator dashboard. Paste it into the plugin’s target setup.
6. Repeat for each platform. Add as many targets as your bandwidth can handle. obs-multi-rtmp and Aitum both support 10+ outputs.
7. Start streaming. Hit “Start Streaming” in OBS. The plugin handles the rest, copying your stream to every configured target.

For Aitum specifically, the plugin adds a separate vertical for each stream target, which makes it easier to monitor each destination’s connection health at a glance.

Pros and Cons of the Plugin Method

Here is what I found after running obs-multi-rtmp for 30 days across four platforms:

• Free and open source. No monthly fees, no usage caps.
• No re-encoding. The stream goes straight from OBS to each platform using copy codec, so quality stays identical.
• Full control. You set per-platform bitrate, resolution, and stream keys.
• Bandwidth hungry. 4 streams at 6 Mbps = 24 Mbps upload. Most home internet cannot keep up.
• CPU/GPU load. You still encode once in OBS, but four simultaneous TCP connections add overhead.
• No failover. If your internet blips, every platform goes down at once.

Method 2: Multistream with a Relay Service (Cloud Encoding)

The relay method flips the architecture: instead of pushing copies of your stream everywhere, you send a single stream to a cloud service. That service redistributes your feed to every platform you have connected. This is how services like Restream, StreamYard, and similar platforms work.

How a Relay Service Works

You sign up for a relay service, connect your streaming accounts (Twitch, YouTube, Facebook, TikTok, etc.) through their dashboard, then point OBS at the service’s ingest URL using its stream key. The service receives your single stream and pushes it out to every connected destination.

The cloud service handles all the heavy lifting, including re-encoding if a platform needs a different bitrate. Your local bandwidth use stays at whatever your base stream is (usually 6 Mbps). That is the whole reason this method exists.

Step-by-Step Setup for Restream and Similar Services

1. Create an account. Sign up at Restream.io or a similar multistream service. Free tiers exist but usually cap you at 2-3 platforms.
2. Connect your platforms. Use the dashboard to link your Twitch, YouTube, Facebook, TikTok, and other accounts. OAuth login keeps this quick.
3. Copy your custom RTMP details. The service gives you a unique ingest URL and stream key. Treat this like any other custom RTMP output.
4. Configure OBS. In OBS Settings, go to the Stream tab. Select “Custom” as the service. Paste the ingest URL and stream key.
5. Optionally install the service’s plugin. Restream offers a plugin that adds chat aggregation and analytics inside OBS. Skip it if you only need multistreaming.
6. Start streaming. Hit “Start Streaming” in OBS. The relay service handles every destination from its end.

The setup is the same whether you use Restream, StreamYard, or a similar service. The differences are in pricing, chat aggregation, and platform coverage.

Pros and Cons of the Relay Method

• Low bandwidth use. One upload to the relay, the service handles distribution.
• Chat aggregation. Most relay services merge chats from all platforms into one window.
• Analytics dashboard. See viewership across all destinations in one place.
• Platform extras. Some services add pre-recorded streams, always-on channels, and scheduling.
• Subscription cost. Free tiers are limited. Full multistream usually requires a paid plan.
• Single point of failure. If the relay service goes down, every destination goes dark.
• Re-encoding on the server. Quality depends on the service’s infrastructure.

Plugin vs Relay Service: Direct Comparison

When I tested both methods back to back on the same 1080p60 stream, the differences came down to bandwidth, cost, and reliability. Here is the side-by-side breakdown I wish someone had shown me before I started.

Bandwidth and Hardware Requirements

Local encoding through a plugin means your upload speed has to handle every stream. Cloud relay only needs upload for your single source stream.

Factor	OBS Plugin (Local)	Relay Service (Cloud)
Upload bandwidth needed	Multiply by number of platforms	Single stream only
CPU/GPU load	Encode once, copy to all	Encode once, rest is handled remotely
Recommended upload	30+ Mbps for 4 streams	6-10 Mbps for any number of platforms
Free tier available	Yes, fully free	Limited (2-3 platforms)
Chat aggregation	No (need extra tool)	Yes, included
Failover	None by default	Built-in on most services

If you have gigabit fiber upload, the plugin method is essentially free. If you are on a typical 20 Mbps cable connection, the relay method is the only realistic option for 4+ destinations.

Quality and Reliability

Plugin-based multistreaming uses copy codec, which means no quality loss. Your stream reaches each platform exactly as OBS encoded it. Relay services re-encode on their servers to match each platform’s optimal settings, which can introduce minor compression artifacts but generally improves compatibility.

Reliability depends on your perspective. The plugin method fails when your local internet drops. The relay method fails when the service has an outage. Both happen. The difference is that relay services usually have redundant ingest servers, so a hiccup on your end might trigger a quick reconnect without the audience noticing.

Will Twitch or Other Platforms Ban You for Multistreaming?

No, Twitch does not ban multistreaming in 2026. Twitch’s community guidelines allow simulcasting as long as you stream to other platforms simultaneously and not exclusively. The key word is simultaneous. You cannot stream to YouTube first and then post a recording to Twitch. That crosses the exclusivity line.

YouTube, Facebook, TikTok, and Kick all explicitly allow multistreaming through their terms of service. Some platforms, like LinkedIn Live, require approval before you can multistream to them. Always check the destination platform’s policy before going live. Multistream rules can change, and a 30-second check in the platform’s help center saves you a potential strike.

Free vs Paid Multistream Options in 2026

For free local multistreaming, obs-multi-rtmp and Aitum Multistream are your best options. Both are open source, both support unlimited destinations, both have active development. I prefer Aitum for its cleaner UI and per-stream monitoring, but obs-multi-rtmp has been around longer and has more community documentation.

For free cloud relay, Restream allows two simultaneous destinations on its free tier. StreamYard offers a free plan with up to six platform destinations, though it is browser-based rather than OBS-integrated. Both are solid if you only need two or three platforms and do not mind a basic feature set.

Paid tiers unlock more destinations, chat aggregation, longer stream durations, and analytics. Expect to pay between $15 and $50 per month for most relay services in 2026. If you are monetized across multiple platforms, the math usually works out in favor of the paid tier.

Frequently Asked Questions

Conclusion

Learning how to multistream with OBS comes down to picking the right architecture for your situation. The plugin method (obs-multi-rtmp or Aitum) is free, fully local, and perfect if you have the upload bandwidth to spare. The relay method (Restream, StreamYard, and similar) costs money but saves your bandwidth, adds chat aggregation, and survives platform outages better.

For most creators just starting out, I recommend the plugin method first. Test your upload speed with two destinations, see how your stream holds up, then decide if you need to upgrade to a relay service. Both paths get your stream to every platform, and both work well once configured.