Introduction

What’s Sync?

Sync is a research company building AI video technology, currently focused on lip sync. Our AI lip sync API takes any video and audio input and generates perfectly matched lip movements — with multiple models optimized for different quality and speed tradeoffs, and official Python and TypeScript SDKs for production integration.

You can use Sync through Studio (our web app) to explore and compare models directly from your browser, or integrate via the API and SDKs to build lip sync into your own apps and workflows.

Send a video of a person speaking English and an audio track in Japanese — Sync produces a new video where the speaker’s lips move naturally to match the Japanese audio. This powers video dubbing, content localization, personalized video messaging, and more.

At a glance

What are Sync’s key capabilities?

• AI Lip Sync Models — Multiple models (lipsync-1.9, lipsync-2, lipsync-2-pro, react-1) optimized for different quality and speed tradeoffs. Pick the right model for your use case.
• Video Dubbing — Combine Sync with TTS services like ElevenLabs to build end-to-end AI video dubbing pipelines. Translate and dub videos into any language.
• Batch Processing — Process up to 500 videos in a single batch operation. Ideal for large-scale content localization and media workflows.
• Python & TypeScript SDKs — Official client libraries so you can integrate the lip sync API in minutes, not days.
• Webhooks — Get real-time status notifications for async workflows. No polling required.

What can I build with Sync?

Sync’s visual dubbing API fits anywhere you need lip movements to match new audio:

• E-learning & training — Localize course videos into dozens of languages while keeping the instructor’s face natural and in sync.
• Marketing & personalized outreach — Generate personalized video messages at scale. One recording becomes thousands of tailored videos.
• Content localization & dubbing — Dub films, YouTube videos, and social content for global audiences with AI lip sync that looks native.
• Entertainment, media & gaming — Power in-game characters, animated content, and post-production dubbing with lipsync technology that runs on API calls.

How do I get started with Sync?

Get from zero to your first AI lip sync generation in three steps:

1. Get your API key — Create one from the Dashboard.
2. Install the SDK — pip install syncsdk for Python or npm i @sync.so/sdk for TypeScript.
3. Make your first generation — Follow the Quickstart to generate a synced video in minutes.

Next steps

Frequently Asked Questions