Sync.so is an AI-powered lip-sync tool that allows users to seamlessly edit lip movements in videos to match any audio in up to 4K resolution. It supports live-action, animated, and AI-generated characters, enabling voice cloning from audio, text, or recordings. Sync.so offers an intuitive Lipsync Studio for creators and a robust API for developers, featuring advanced diffusion models and zero-shot learning for instant use without prior training. This tool is ideal for content localization, video editing, and multi-language dubbing across industries
Sync.so is a video editing service focused on realistic lip-sync and dialogue editing. You upload a video, provide new audio or a translated script (or record your voice), and Sync.so generates a new video where the speaker’s lips move in sync with the new audio. It supports high-quality outputs even up to 4K resolution.
Behind the scenes, Sync.so offers several models. Its “lipsync-2” model adjusts lip movement to match audio, preserving the unique speaking style of the original speaker. For the highest fidelity sharper facial detail, natural teeth, beard realism it offers “lipsync-2-pro”.
The service is useful for many scenarios: translating or dubbing videos into other languages while preserving realism, creating localized versions of content, replacing dialogue entirely, editing or re-filming scenes without new recording, or working on animations or AI-generated characters.
Sync.so offers both a studio interface for creators and an API/SDK for developers or integration into production workflows.
Pricing is usage-based. There are tiers for small creators (short clips), and larger plans for long videos, team use, and heavy use of voice clones and video exports.
In short, Sync.so aims to make video content malleable: you can rewrite dialogue, dub content, or translate videos all with lip-sync fidelity without reshooting.
Lets you replace video dialogue or dub in other languages while syncing lips to maintain realism.
Supports live-action, animation and AI-generated video across various video types.
Offers high quality output, including 4K resolution and detailed facial fidelity with its top model.
Provides both a user friendly studio interface and API access for developers or larger workflows.
Makes video localization or dubbing easier without reshooting saves time and cost.
For long videos or heavy use, costs can add up quickly because export and processing are usage based.
If source video has complex facial features or close ups, even best model may show slight detail loss or distortion.
Highly stylized or unconventional speech patterns may not sync perfectly automatically.
Quality depends on initial audio and video noisy audio or low resolution may lead to poor result.
For heavy or enterprise workflows, setup via API may need more technical work compared to simple upload-and-go.
Automatic lip sync may struggle with overlapping speakers or multiple voices in a scene.
For complex edits beyond speech replacement like background match, scene edits, motion tracking additional editing tools may still be required.
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