LatentSync

At a glance

• Editor score
  6.8 / 10
• Pricing
  Open source
• Best for
  Researchers training latent lip-sync models
• Paid from
  Free
• Facts checked
  21 Sep 2026

• Where it wins

  • Includes latent-diffusion inference with pretrained model checkpoints
  • Supports both local Gradio and command-line inference workflows
  • Provides data processing, U-Net training, and SyncNet evaluation scripts

• Where it doesn't

  • Requires compatible local GPU hardware and self-hosted operation
  • Output resolution is limited to 720p or lower
  • Technical workflows are better suited to developers and researchers

Our verdict on LatentSync

LatentSync is an open-source lip-sync system from ByteDance for developers and researchers working with audio-driven video generation. Its core approach uses audio-conditioned latent diffusion to generate synchronized mouth movements in video. The package combines pretrained checkpoints with local inference options, making it suitable for teams that want to run a model on their own hardware rather than use a hosted application. Its intended audience is technical: users need to manage the local environment and provide compatible GPU hardware.

The strongest part of LatentSync is its coverage of the model lifecycle. Inference is available through a local Gradio app or a command-line workflow, while the repository also includes video and audio data-processing tools, U-Net training scripts, and SyncNet training and evaluation. That breadth makes it relevant to researchers training latent lip-sync models, not only to users who need a single inference interface. Pretrained checkpoints also provide a starting point for running the system without beginning with model training.

The trade-off is the self-hosted focus. LatentSync is delivered as local open-source software, so it fits organizations with engineering resources, GPU access, and a need to control their own workflows. The published output specification is 720p or lower, which may limit projects requiring higher-resolution results. Teams seeking a managed video service, a simple no-code experience, or a hosted integration should choose a different type of tool. LatentSync is a stronger fit when model training, evaluation, and local inference matter more than service convenience.

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LatentSync pricing

LatentSync fact sheet

Alternatives to LatentSync

• LipDubA multilingual dubbing platform with voice cloning, 4K output, and API access.9.4
• Sync LabsA flexible lip-sync toolkit with 4K output, voice cloning, and developer integrations.9.2
• CHAMELAION LipSync APIA low-cost lip-sync API with uploads, speaker detection, SDKs, and asynchronous jobs.9.1

See all LatentSync alternatives →

Featured on iTechGuides

LatentSync is listed in our AI Video Lip Sync Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update