An AI lip-sync and visual dubbing platform from US-based Sync Labs. Give it a video and an audio track, and it redraws the speaker’s mouth to match the audio, making the footage look as though it was shot in another language. It is designed for the hard conditions of live-action footage — a face partly hidden by a hand or a prop, several people on screen, extreme camera angles, low light — and is used in film, advertising, and podcast production. Beyond the web Studio, it offers a REST API, Python and TypeScript SDKs, an Adobe Premiere Pro plugin, and a ComfyUI node, so it drops straight into an existing editing workflow.
Key Features
- Multiple lip-sync models for different jobs:
lipsync-1.9for maximum speed on simple videos,lipsync-2as a general-purpose model that preserves speaking style,lipsync-2-prowith enhanced facial detail,react-1for expressive short clips, and the latestsync-3. You can trade quality against speed and cost - sync-3 for difficult footage: It builds wide spatial context to understand the scene, which lets it handle close-ups, extreme angles, and objects obstructing the face. It supports 4K resolution and is positioned for production-grade video work
- Multilingual visual dubbing: Combined with text-to-speech, it makes the original speaker appear to be speaking another language. You can reuse an existing audio track or reproduce the speaker’s voice with voice cloning
- Automation via API, SDKs, and webhooks: Alongside the REST API there are official SDKs for Python 3.8+ and TypeScript (Node.js 18+), plus webhooks for async workflows. Higher plans add a batch API that processes up to 500 videos per batch
- Plugins for editing tools: The Adobe Premiere Pro plugin lets you pick a clip from the timeline and generate lip-synced video without leaving the editor, and a custom node is available for ComfyUI
Pricing
| Plan | Monthly | What’s included |
|---|---|---|
| Hobbyist | $5 | Videos up to 1 min, 1 concurrent job, up to 3 cloned voices, API / SDK / Studio access (usage at $0.05/second) |
| Creator | $19 | Up to 5 min, 3 concurrent jobs, up to 5 cloned voices, bring your own TTS API key, active speaker detection, no watermark ($0.05/second) |
| Growth | $49 | Up to 10 min, 6 concurrent jobs, up to 15 cloned voices, 3 team seats included, 5% usage discount ($0.0475/second) |
| Scale | $249 | Up to 30 min, 15 concurrent jobs, up to 50 cloned voices, 5 team seats, batch API, dedicated support, 20% usage discount ($0.04/second) |
| Enterprise | Contact sales | Custom pricing |
A free trial is available before subscribing, with limits on clip length and number of generations. Note that usage is billed per second of generated video on top of the monthly fee.
Pricing is current as of August 2026. Check the official site for the latest rates.
Pros & Cons
✅ Pros
- Built for the awkward realities of live-action footage — obstructed faces, near-profile angles, low light — so it can be applied to finished, carefully shot material
- Five models let you draft with a fast one and deliver with sync-3, keeping costs down
- The Adobe Premiere Pro plugin and ComfyUI node make it easy to fold into an existing editing or generation workflow
- API, SDKs, webhooks, and batch processing suit automated pipelines that produce many language versions
- Starts at $5/month with Hobbyist, so you can try it small and scale up
⚠️ Cons
- Per-second usage billing on top of the monthly fee makes costs hard to predict for long or high-volume work
- Maximum clip length (1 to 30 minutes) and concurrency are set per plan, so long-form work requires a higher tier
- Lower plans add a watermark to the output (removed from Creator upward)
- Because it works with real people’s faces and voices, likeness and audio licensing need to be cleared first
- The dashboard and documentation are primarily in English, with limited Japanese material
Comparison with Similar Services
| Criteria | sync. | HeyGen | Rask AI | ElevenLabs Dubbing |
|---|---|---|---|---|
| Main purpose | Lip-sync and visual dubbing for live-action video | AI avatar video generation and video translation | Multilingual video dubbing | Audio-first multilingual dubbing |
| Role of lip-sync | Core capability, with several dedicated models | Part of the translation feature | Part of the translation feature | Available on some plans |
| Applying to existing footage | Strong, designed for hard conditions | Supported | Supported | Audio-centric |
| Editing tool integration | Premiere Pro / ComfyUI | Limited | Limited | Limited |
| Developer API | Extensive (SDKs, webhooks, batch) | Yes | Yes | Yes |
The use cases separate cleanly. If you want to build an avatar from scratch, HeyGen fits; if you have already shot live-action footage and need the mouth to match another language, sync. is the closer match.
Who Is It For
- Video production companies and ad agencies taking already-shot live-action footage to other languages
- Creators who want English and Japanese versions of their YouTube videos or podcasts
- Developers embedding a dubbing feature into their own product, given the mature API and SDKs
- Editors who work daily in Adobe Premiere Pro or ComfyUI and want to stay inside those tools
- Anyone working with material — obstructed faces, changing angles — that general-purpose tools tend to break on
Summary
sync. treats lip-sync as the core product rather than a bonus attached to video translation. Its strengths are sync-3’s handling of difficult live-action footage and the ease of embedding it through the API, SDKs, and editing plugins, which pays off most when you produce language versions continuously and at volume rather than as one-offs. At $5/month you can start by checking the output quality on a short clip of your own, then pick a plan based on the length and number of videos you actually need. If real people are involved, clear the rights questions first.