Introduction

What’s Sync Labs?

Sync Labs 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 Labs 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 Labs 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


Models	lipsync-1.9, lipsync-2, lipsync-2-pro, react-1, sync-3
Face resolution	512×512 (lipsync-2, lipsync-2-pro), 4K native (sync-3)
Max video duration	Up to 30 minutes depending on plan
Pricing (at 25 fps)	From $0.02/sec (lipsync-1.9) to $0.133/sec (sync-3)
Rate limit	60 requests/min on POST /v2/generate
Batch processing	Up to 500 generations per batch (Scale+ plans)
SDKs	Python 3.8+ and TypeScript/Node.js 18+
Free trial	3 generations/month, max 20s each — no credit card required

What are Sync Labs’ key capabilities?

AI Lip Sync Models — Multiple models (lipsync-1.9, lipsync-2, lipsync-2-pro, react-1, sync-3) optimized for different quality and speed tradeoffs. Pick the right model for your use case.
Video Dubbing — Combine Sync Labs 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 Labs?

Sync Labs’ 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 Labs?

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

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

Next steps

Play with models

Explore and compare models directly from your browser to understand how they work.

Explore API

Learn how to integrate our API into your apps, platforms, and services.

Join Discord

Stay connected, ask for help, and learn from the community.

Build with our SDKs

Use our Python and TypeScript SDKs to integrate Sync Labs into your applications.

Frequently Asked Questions

What is Sync Labs?

Sync Labs is an AI lip sync API that generates perfectly matched lip movements for any video and audio input. It powers video dubbing, content localization, personalized video messaging, and more. Built by a research company focused on AI video technology, Sync Labs produces studio-grade results at scale.

How much does Sync Labs cost?

Sync Labs offers multiple plans based on usage. You can estimate costs before submitting a generation using the cost estimation endpoint. Visit the Billing page in your dashboard for detailed pricing, plan comparisons, and current usage information for your account.

Which model should I use?

Use lipsync-2 for general purpose lip sync that preserves speaking style. Choose lipsync-2-pro for premium quality with enhanced facial detail. Use lipsync-1.9.0-beta for maximum speed on simple videos, react-1 for expressive lip sync with emotions on short clips, and sync-3 for professional-grade video with native visual intelligence that handles close-ups, extreme angles, and obstructions automatically.

What file formats does Sync Labs support?

Sync Labs accepts common video formats like MP4 for video input and WAV or MP3 for audio input. Videos and audio can be provided via publicly accessible URLs, uploaded directly through the API, or referenced by asset ID from your media library.