Stream caption and translation alternatives

Compare local models, hosted captions and Twitch extensions by the output your audience needs.

Compare four distinct workflows

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Caption and translation workflows
Tool	Processing	Delivery	Languages and viewer choice	Cost
StreamTranslate	Hosted speech recognition and translation; local capture and rendering still use resources	OBS/Streamlabs Browser Source; separate broadcaster-enabled Twitch extension	65 live-caption target languages; per-viewer selection through Twitch extension	3 free hours/month, card required; $12 Pass for 12 hours; monthly plans
LocalVocal	Local OBS models; CPU supported, GPU optional; optional cloud providers	OBS Studio plugin; text, file and RTMP caption outputs depend on configuration	Local translation and optional providers; coverage depends on model/path	Free open-source plugin; optional cloud provider costs
Stream Closed Captioner	Browser/service workflow configured by broadcaster	Twitch channel overlay or panel extension	Viewer settings and Bits-based enhanced translation; check current languages	Free basic captions; translation uses Bits
Caption.Ninja	Browser speech recognition with selectable translation backend	Capture page and Browser Source overlay	Free local translation or API-based options; language coverage depends on path	Free tool; paid API/provider charges can apply

Native CC is another output path

The Closed Captioning OBS Plugin by ratwithacompiler uses Google Cloud speech recognition and can send captions through Twitch’s native caption track, including VOD support described by the project. It also documents OBS text-source captions and transcript files. It supports multiple recognition languages; its native-track character-set restrictions matter for languages such as Japanese. This OBS Studio plugin does not load in Streamlabs Desktop. Check its release and encoder requirements before choosing it.

Local and browser translation choices

LocalVocal is a free OBS Studio plugin with local recognition and translation. It runs on CPU; a dedicated NVIDIA GPU is not required. GPU acceleration is optional. Choose local models to keep that processing on your machine, or explicitly configure a cloud provider with its own data path and costs. It is a good fit when local control matters and you can configure models and OBS sources. It is not a Streamlabs plugin.

Caption.Ninja provides a caption capture page and a Browser Source overlay. Its official page documents free local translation and paid API-based translation, so it is inaccurate to call it transcription-only. Chrome or Edge is recommended for recognition. Choose the translation path, language pair and audio route explicitly; paid provider usage may require your own API key and billing. A scene overlay gives all viewers the same rendered output.

Hosted services and audience language choice

Choose StreamTranslate when you want hosted speech processing, an OBS or Streamlabs Browser Source, or its broadcaster-enabled Twitch extension. The live-caption product supports 65 target languages; the separate video/VOD subtitle tool supports 60. Recognition support and capture methods depend on the source language and setup. In browser-microphone mode, keep Control open, select the intended mic, start the caption session and rehearse. The optional OBS audio plugin is separate from the visual Browser Source.

StreamTranslate’s official Twitch extension is enabled by the broadcaster: install and activate it on the channel, link the caption session and supply audio. Each viewer can choose a caption language. Viewers do not install a Chrome add-on. This does not translate an arbitrary channel that has no broadcaster setup, and it does not translate typed chat. An OBS/Streamlabs Browser Source is a separate output: its captions become part of the video, so all viewers see the selected overlay language. A native CC track is another integration.

Maestra has live transcription, translation and dubbing with OBS/vMix and audience-link workflows. Check Maestra Live’s documentation, rather than treating all Maestra products as upload-only.

Retired tools and old tutorials

The original Web Captioner service closed in 2023. Older tutorials can still rank, so verify the exact project and current owner before following an installation or entering audio/API details.

More product comparisons

Compare with your real speech

Use the same microphone, source language, target language and sample speech in each tool. Include names and gaming terms you actually say. Record under your normal OBS workload, compare missing words and translation meaning, then check scene changes, capture stop/restart and viewer controls. We have not measured a controlled speed, accuracy or CPU-use winner.

Current StreamTranslate plans

Free Plan: 3 active hours every month. Card required; no payment unless you upgrade. Stream Pass is $12 one-time for 12 active hours usable across sessions, without a wall-clock expiry. Starter is $14.99/month for 25 hours plus $1/hour overage; Pro is $34.99/month for 50 hours plus $0.50/hour overage; Elite is $149/month with unlimited hours. Pro and Elite include two overlay languages. The $1 first-month Starter offer is for first-time customers. See current plan details.

Questions before choosing

Which live-caption option should I choose?

Choose by audio capture, source and target languages, whether you need a scene overlay or viewer-controlled captions, privacy and expected usage. No tool on this page is a measured overall speed or accuracy winner.

Does LocalVocal require a GPU?

No. LocalVocal supports CPU processing with optional GPU acceleration. Recognition and translation performance depend on model, hardware and workload.

Can Twitch viewers choose separate languages?

StreamTranslate’s official Twitch extension gives viewers a language choice after the broadcaster installs, activates, links and supplies audio to it. A Browser Source video overlay is a separate output with shared visible text.

What does StreamTranslate cost?

The Free Plan includes 3 active hours every month, card required with no payment unless upgrading. Stream Pass is $12 one-time for 12 hours. Starter is $14.99/month for 25 hours; Pro is $34.99/month for 50 hours; Elite is $149/month with unlimited hours.

Provider documentation and scope

Reviewed October 15, 2026. StreamTranslate publishes this comparison. Linked provider documentation establishes features; this is not a controlled comparative accuracy, latency or CPU benchmark. The published OBS plugin test record does not by itself prove Twitch viewer delivery.

Test the output your viewers need

Configure the audio input, check the captions and verify the viewer controls before broadcasting.

Open StreamTranslate OBS and Streamlabs setup