LocalVocal vs StreamFluent: What's the Difference for Live OBS Translation?
Matt McElligott
LocalVocal vs StreamFluent: What's the Real Difference for Live OBS Translation?
Both LocalVocal and StreamFluent do live translation in OBS. That is where the similarity ends.
They solve different problems. They produce different outputs. They serve different goals. Picking the wrong one for your situation means frustration, not just a bad experience.
This is a genuine comparison. LocalVocal is a real, good product. If it fits your needs, use it. This post will help you figure out which one fits.
What LocalVocal Does
LocalVocal is a free OBS plugin. It runs OpenAI Whisper on your local machine, transcribes your speech in real time, and displays translated captions as a text source in your OBS scene.
Key facts:
- Price: Free. No subscription.
- Setup: Download plugin, install, configure a caption source in OBS.
- Output: Text captions overlaid on your stream.
- Processing: Runs entirely on your CPU and GPU. No cloud dependency.
- Viewer experience: Viewers see text on screen while they watch.
It works well. On a capable machine, transcription is fast and reasonably accurate. For a streamer who wants captions on their main stream, LocalVocal is a solid choice.
The limitation is what it produces. Text.
What StreamFluent Does
StreamFluent is a cloud-based live dubbing service with an OBS plugin. It generates actual dubbed audio in your voice, in another language, in real time. That audio is routed to a separate stream destination.
Key facts:
- Price: Free tier with 3 hours included. Paid plans start at $9.99/month.
- Setup: Install plugin, configure language pair, add second stream output in OBS. About 10 minutes total.
- Output: Dubbed audio in a second language, routed to a separate live stream channel.
- Processing: Cloud-based. Under 2% CPU overhead on your machine.
- Languages: 32.
- Latency: Under 1 second end-to-end.
- Viewer experience: Viewers on the second channel hear you speaking their language. They do not read anything.
The distinction is what your viewers actually receive. StreamFluent gives them a stream. Not text on top of a stream. An actual audio experience in their language.
Side-by-Side Comparison
| LocalVocal | StreamFluent | |
|---|---|---|
| Price | Free | Free tier (3 hrs), then $9.99/mo+ |
| Setup time | 15-30 min | ~10 min |
| Output | Caption text overlay | Dubbed audio stream |
| Languages | Whisper model dependent | 32 |
| CPU usage | Moderate to high (local) | Under 2% (cloud) |
| Second channel | No | Yes |
| Voice cloning | No | Yes (Pro tier) |
| Viewer experience | Reads captions | Hears you in their language |
| Offline capable | Yes | No (requires internet) |
When to Use LocalVocal
LocalVocal is the right choice when:
- You want captions on your main stream and nothing else.
- You are not trying to build a separate international audience.
- Budget is the deciding factor. Free wins.
- You have a machine with enough CPU and GPU headroom to run Whisper without impacting stream quality.
- You prefer everything to run locally without cloud dependencies.
There is nothing wrong with this choice. Captions serve a real purpose. They help viewers in environments where they cannot use audio. They help hearing-impaired viewers. They help people who need visual context while following fast gameplay.
When to Use StreamFluent
StreamFluent is the right choice when:
- You want international viewers to actually hear your stream, not read it.
- You want to grow a second-language audience on a separate channel.
- Your machine is already maxed during streams and you need cloud offloading.
- You want voice cloning so the dubbed voice actually sounds like you.
- You want a separate English, Spanish, French, or other language channel running alongside your main channel.
The key argument for StreamFluent is audience behavior. Native speakers in other languages do not watch gaming streams by reading subtitles. They scan, see captions, and leave. If the audio sounds like their language, they stay.
LocalVocal gives your viewers text. StreamFluent gives them a stream.
If your goal is to have a real international audience watching your content live, captions alone will not build that audience.
Can You Use Both?
Yes. And it is a reasonable setup.
LocalVocal handles captions on your main stream for viewers who prefer text support. StreamFluent handles the dubbed audio routed to your second-language channel.
Your main stream gets captions via LocalVocal. Your English or Spanish channel gets live dubbed audio via StreamFluent. Two tools, two outputs, one original stream.
The CPU impact is worth thinking about. LocalVocal runs locally and takes real CPU. StreamFluent uses under 2% because the processing is in the cloud. Running both is feasible on most modern streaming machines.
If you want to start simple, pick one based on your primary goal. Want captions on your main stream? LocalVocal. Want a second audience that actually listens? StreamFluent. Want both? Run them together.
Try StreamFluent Free. 3 hours included, no credit card required.