Task
Best AI tools to lip sync videos
We compared 2 AI tools to lip sync videos. All 2 have a free plan. HeyGen ranks first on our task-fit signals: video Translation applies lip-sync to translated videos, and developers can call a dedicated Lipsync API. Listings were last checked on Nov 6, 2026.
Lip-sync tools match a face in a video to new audio, used for dubbing and avatar videos. Use them only with footage and voices you have the rights and consent to use. Compare output resolution, the languages supported, and how many minutes each plan includes.
Preview build: this list has 2 of the 8+ tools a task page needs before it can be published (methodology, coverage rule).
The ranking
- 1
HeyGen
FreemiumFrom $29/moWhy it fits: Video Translation applies lip-sync to translated videos, and developers can call a dedicated Lipsync API.
Fit score 5/9: The tool's primary category matches the task's category; Five or more verified features; A free plan is available (stated on its pricing page); Plans and prices are verified from its own pricing page
- 2
Synthesia
FreemiumFrom $29/moWhy it fits: AI Dubbing re-voices existing videos with voice preservation and an optional lip sync step.
Fit score 5/9: The tool's primary category matches the task's category; Five or more verified features; A free plan is available (stated on its pricing page); Plans and prices are verified from its own pricing page
Side-by-side
Choosing a tool to lip sync videos: what the data says
- Free to try: HeyGen and Synthesia have a free plan.
- Lowest listed entry price: HeyGen at $29/mo; the highest entry price here is Synthesia at $29/mo.
- For developers: HeyGen and Synthesia offer an API.
Order is by fit score, from published signals; ties go alphabetically and no tool can pay for a position. How the score works.