LangSwap
LangSwap: A focused open-source option for language-pair dubbing on NVIDIA GPU systems. Ranked #21 of 26 in AI Dubbing Software by our editors (7.1/10); pricing: Open source; best for self-hosters needing lightweight language-pair dubbing.
At a glance
- Editor score7.1 / 10
- PricingOpen source
- Best forSelf-hosters needing lightweight language-pair dubbing
- Paid fromFree
- Facts checked20 Sep 2026
Where it wins
- Combines speech recognition, translation, voice cloning, and subtitle output
- Timing-aware dubbing adjusts speed and stretches speech to fit video
- Offers Docker browser deployment plus command-line processing
Where it doesn't
- Designed for users with an NVIDIA GPU
- Self-hosting requires local deployment and model management
- Named integration coverage is limited to ElevenLabs
Our verdict on LangSwap
LangSwap is an open-source, self-hosted video dubbing application from Peace Data Inc. It is aimed at users who want to process video locally with an NVIDIA GPU rather than rely solely on a hosted workflow. The application combines automatic speech recognition, translation between language pairs, voice-cloned text-to-speech, timing-aware dubbing, and subtitle generation. It provides a browser-based interface through Docker and also supports command-line processing, with dubbed video and source and translated SRT files as outputs.
Its strongest distinction is the depth of its dubbing workflow. LangSwap is designed to carry a video from speech recognition through translation and cloned speech generation, while timing-aware speed adjustment and stretching help align the dubbed audio with the source timing. Local model inference is supported alongside selected hosted APIs, and the published feature set includes lip sync and voice cloning. This makes it a practical match for self-hosters who need a focused language-pair dubbing tool with both a graphical workflow and command-line access.
The trade-off is operational and ecosystem scope. Docker deployment, local model inference, and an NVIDIA GPU requirement make LangSwap better suited to technically comfortable users than teams seeking a managed setup. ElevenLabs is the named integration, so organizations that depend on a wider collection of connected services may find the platform narrower than their workflow requires. Choose LangSwap for local control, subtitle generation, timing-aware dubbing, and a lightweight open-source deployment; choose an alternative if broad integrations or a hosted-first experience matter more than self-hosting.
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LangSwap pricing
LangSwap fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Output languages | Not verified |
| Lip synchronization | Yes |
| Speaker matching | Not verified |
| Voice cloning | Yes |
| Maximum clip duration | Not verified |
| API access | Not verified |
| Deployment | Self-hosted |
| Platforms | Web |
| Support | Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 1 integrations: ElevenLabs |
| Pricing | Open source |
| Website | langswap.app |
| Facts checked | 20 Sep 2026 |
LangSwap integrations
LangSwap lists 1 integrations on its own site.
- ElevenLabs
Alternatives to LangSwap
- pyVideoTransA broad, free workflow for teams that want local control over AI video dubbing.9.4
- DubverseAffordable collaborative dubbing with voice cloning, lip sync, subtitles, and API access.9.2
- VidbyA web-based dubbing suite with 70 languages, voice cloning, lip sync and review options.9.1
See all LangSwap alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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