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sync. Review

Sync.so is an AI-powered platform that provides natural lip-sync for speech across live-action, animation, and AI-generated video footage up to 4K resolution.

shipped Apr 2, 2026aifreemium
ai
sync. — product screenshot

Why it matters

1Provides natural lip-sync for speech across live-action, animation, and AI-generated video footage up to 4K resolution.
2Features the sync-3 AI model, released June 2026, which offers global understanding and handles complex video scenarios.
3Offers API access and workflow integrations via plugins for Adobe Premiere and DaVinci Resolve.
4Operates on a freemium business model, supporting multilingual translation and voice cloning.

Stork’s verdict on sync.

Sync. delivers natural 4K lip-sync for diverse video, yet subtle emotional nuances can be lost.

Specs

API Docs

View Documentation →

GitHub

View Repository →

API Available

Yes, public API

overview

What is sync.?

sync. is an AI video lip-sync tool developed by Synchronicity Labs that enables video content creators, film and animation studios, and software developers to generate natural lip-sync for speech across live-action, animation, and AI-generated video footage. It supports resolutions up to 4K and offers both a web studio and an API for integration.

features

Key Features of sync.

sync. provides a comprehensive suite of features designed for high-fidelity lip-sync and video manipulation, leveraging advanced AI models to ensure realism and accuracy across diverse content types and challenging scenarios.

  • Natural lip-sync for speech across live-action, animation, and AI-generated video footage.
  • Supports video resolutions up to 4K, preserving fine details like teeth and facial features.
  • API and web studio access for flexible integration into existing workflows and custom applications.
  • Proprietary sync-3 AI model (released June 2026) for global understanding of a person across an entire shot, handling close-ups, cropped frames, partially obscured faces, and extreme angles.
  • lipsync-2-pro model (reviewed September 2025) offering studio-grade lip sync, multilingual translation, and voice cloning via API.
  • lipsync-2 model with "style preservation" capability, learning and generating a speaker's unique speech cadence across different languages.
  • Automatic obstruction detection and generation around elements like hands or microphones without manual intervention.
  • Workflow integration through plugins and extensions for popular video editing software, including Adobe Premiere and DaVinci Resolve.
  • Proprietary watermarking technology for easy verification of modified videos.
  • Handles complex video scenarios such as multiple faces, low light conditions, and fast camera movements.

use cases

Who Should Use sync.?

sync. is designed for professionals and organizations requiring precise, natural lip-sync capabilities for video content, enabling efficient localization, post-production, and personalized communication.

  • Video Content Creators & Film/Animation Studios: For dubbing trailers, short-form content, and character re-animation in animated content and games without traditional studio sessions.
  • E-learning & Marketing Professionals: To update lessons across various languages or repurpose creator videos for different regional markets and updated product messaging.
  • SaaS Companies: For aligning onboarding and support videos with updated product messaging across various languages, maintaining original instructors on screen.
  • Software Developers: Utilizing the robust API and SDKs (Python, TypeScript) for custom integrations, automated workflows, and large-scale analysis of human speech patterns in video.
  • Video Editors & Post-Production Teams: For dialogue replacement, fixing misreads, updating scripts, and localizing videos for global audiences without requiring reshoots.

how to use

How to Use sync.

Users can begin utilizing sync. by accessing its web studio or integrating its API into existing workflows. The platform is designed for straightforward video processing, allowing for rapid generation of lip-synced content.

  • 1Access the sync.so web studio or integrate the API using available SDKs for Python and TypeScript.
  • 2Upload video footage (live-action, animation, or AI-generated) up to 4K resolution.
  • 3Provide new audio or typed text that the speaker's mouth movements will be matched to.
  • 4Select desired AI models (e.g., sync-3, lipsync-2-pro) for specific capabilities like style preservation, multilingual translation, or voice cloning.
  • 5Generate the lip-synced video, which can include voice cloning or audio generation for the new input.
  • 6Integrate the output into professional editing software using plugins for Adobe Premiere or DaVinci Resolve, or download the processed video directly.

pricing

sync. Pricing & Plans

sync. operates on a freemium model, providing a free tier with limited capabilities and usage. Paid plans are available for users requiring advanced features, higher resolution processing (up to 4K), and increased quotas. Specific pricing details for these tiers are published on the official sync.so pricing page.

  • Freemium: Includes a free tier with basic features and usage limits.
  • Paid Plans: Offer enhanced capabilities, higher resolution support (up to 4K), and increased processing quotas; details available on https://sync.so/pricing.

Pros

  • +Provides high-fidelity, natural lip-sync for diverse video types (live-action, animation, AI-generated) up to 4K resolution.
  • +Offers robust API access and SDKs (Python, TypeScript) for developer integration and automated workflows.
  • +Features advanced AI models (sync-3, lipsync-2-pro) capable of handling complex scenarios like obstructions, extreme angles, and preserving original style/emotion.
  • +Enables seamless multilingual translation and dubbing, facilitating global content localization.
  • +Offers direct workflow integration through plugins for professional video editing software like Adobe Premiere and DaVinci Resolve.
  • +Includes proprietary watermarking technology for easy verification of modified video content.

Cons

  • −Potential for subtle emotional nuances to be lost if the new audio significantly deviates from the original's emotional delivery.
  • −Specific pricing details for paid tiers are not transparently listed without visiting the dedicated pricing page.
  • −Optimal results are contingent on the quality of the input video and audio, requiring users to provide high-fidelity source material.
  • −The platform's primary focus is on lip-sync, which may not fully address broader video generation or comprehensive localization needs beyond the core functionality.

Policies

Pricing Page

View Pricing→

Similar Tools

sync. vs Competitors

sync. distinguishes itself in the AI video lip-sync market through its dedicated focus on high-fidelity, natural lip-sync for existing video footage, often excelling in precision compared to more general-purpose video generation tools.

1
Rask AIOn StorkCompare

Rask AI is an AI-powered video localization and dubbing platform that integrates lip-sync for human-quality multilingual content.

While sync. focuses on pure lip-sync quality and offers a freemium model, Rask AI excels at end-to-end video localization at scale with support for over 130 languages, though its lip-sync feature is part of paid plans.

2
HeyGenOn StorkCompare

HeyGen specializes in generating talking avatar videos with AI-driven lip-sync, often used for marketing, e-learning, and quick video localization.

HeyGen focuses on creating talking avatar videos from scripts or audio, offering customizable AI avatars and multilingual support, whereas sync. is described as a tool for modifying speech in existing video footage (live-action, animation, AI-generated) with high precision. HeyGen also offers free tools and trials.

3
SynthesysOn StorkCompare

Synthesys is an AI video agent that orchestrates multiple frontier models to produce various video styles, including ads, UGC, and training videos, with integrated lip-sync and voice cloning.

Synthesys provides a comprehensive AI video generation platform with a wide range of avatars, voices, and video formats, handling lip-sync as part of a broader video creation workflow, while sync. is specifically focused on high-fidelity lip-sync for existing video content. Synthesys supports 4K resolution and multilingual content.

4
LipDub AIOn StorkCompare

LipDub AI is designed for professional production, offering high-fidelity AI lip-sync that preserves unique speaker details and maintains quality across natural movement.

LipDub AI emphasizes data ownership and a proprietary model built for natural articulation and reliable performance, supporting all languages and 4K resolution, similar to sync.'s focus on high-quality lip-sync for various footage types. It offers a free trial.

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