Quick Answer
No public benchmark ranks lip sync quality, so treat any list that crowns one tool with suspicion, this one included. What can be compared is what each maker publishes. Percify takes one photo plus audio and charges 2 credits a second, about $2.53 a minute on the Creator plan, with no watermark on any plan. Sync.so charges $0.05 a second on its $5 Hobbyist plan. D-ID animates any photo, with a 14 day trial of 3 minutes carrying a full screen watermark. HeyGen and Synthesia lead with stock presenter libraries instead. The models underneath, InfiniteTalk and LatentSync, are Apache 2.0 and free to run yourself.
Lip sync platforms compared on what they publish: what each takes as input, the price a minute, free terms and watermarks, plus the five point test to run on your own clip. Checked 15 September 2026.
Related next steps
Every list of this kind ends by crowning one tool, and none of them publishes the test. There is no shared benchmark for lip sync, no agreed metric, and no way for a reader to check the ranking, so this page does something else: it compares what each maker states on its own pages, and then gives you the test to run yourself in ten minutes.
We make Percify, so read its row with that in mind. Everything below was read on each maker's own page on 15 September 2026.
What each one publishes
| Platform | What it takes | What it charges | Free terms | Watermark |
|---|---|---|---|---|
| Percify | One photo plus audio, or a script | 2 credits a second, about $2.53 a minute on Creator | 10 credits, no card | None on any plan |
| Sync.so | Video or image plus audio | $0.05 a second on Hobbyist, $5 | Not listed | None from Creator, $19 |
| D-ID | Any photo | Lite $4.70, Pro $16, billed yearly | 14 day trial, 3 minutes, personal use | Full screen on the trial |
| HeyGen | Stock avatars, 1 custom on free | Creator $29 a month | 3 videos a month, up to a minute | Removed from Creator |
| Synthesia | Stock avatars, personal from Creator | Starter €26, or €16 billed yearly | Basic 1,200 credits, no downloads | Logo removed from Starter |
| Vidnoz | 1,900+ stock avatars | $26.99 a month, or $19.99 billed yearly | 30 credits a day, about 60 seconds | On the free plan, at 720p |
| Descript | Footage you filmed | Hobbyist $16 billed yearly, $24 monthly | Not read on this date | Not read on this date |
Two different products sit in that table. Percify, Sync.so and D-ID animate an image or a video you bring. HeyGen, Synthesia and Vidnoz sell a library of presenters to pick from. If the face has to be yours, the second group is answering a different question.
The test to run yourself
Lip sync fails in specific, visible ways, so judge it on the same clip everywhere:
- Use one audio file across every tool, 15 seconds, with ordinary speech rather than a demo script.
- Watch the closures. P, B and M force the lips shut. If they stay parted, the model is approximating.
- Watch the pauses. A mouth that keeps moving through silence is the most common giveaway.
- Watch the teeth and tongue at the start of a word, where cheap models blur.
- Play it at half speed once, then at full speed with sound off.
Ten minutes of that tells you more than any ranked list, because it uses your audio, your face and your language.
The models underneath are open
Much of what these platforms run is public. InfiniteTalk ↗ released weights and code under Apache 2.0 on 19 August 2025, and it takes an image or a video plus audio, with no length limit. LatentSync ↗ is Apache 2.0, reaching 1.6 on 11 June 2025. MuseTalk is MIT. One trap: the open version of Wav2Lip is non commercial, so check the licence before shipping client work with it.
Running them yourself trades a subscription for a GPU and your own time. Hosted tools are buying you the workflow, not the model.
What a minute costs
On Percify, InfiniteTalk Fast ↗ is 2 credits a second, so a minute is 120 credits, about $2.53 on the Creator plan ($26 for 1,233 credits), and the avatar itself is 5 credits for the face and 5 for the voice, once, which the free plan's 10 credits cover. Higher quality InfiniteTalk runs 4 credits a second at 480p, and 1.5 times that at 720p. Sync.so publishes a per second price too, $0.05 on Hobbyist. The subscription tools price by plan instead, which is cheaper at volume and more expensive for the occasional video.
See also free lip sync generators, the best AI lip sync app, the best AI avatar generators compared and Percify's plans and packs.
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Frequently asked
Nobody can answer that from published data, because there is no public benchmark and no maker publishes a comparable test. Run your own: one 15 second audio file through each tool, then check that P, B and M close the lips, that the mouth stops during silence, and that the teeth stay sharp at the start of words.
On Percify, 2 credits a second, so 120 credits a minute, about $2.53 on the Creator plan ($26 for 1,233 credits), read on 15 September 2026. Sync.so lists $0.05 a second on its $5 Hobbyist plan. HeyGen, Synthesia and Vidnoz sell monthly plans rather than per second pricing.
Yes, on the tools that animate an image you bring: Percify takes one photo plus an audio file, and D-ID animates any photo. Platforms built around stock avatar libraries start from their own presenters instead.
Read on 15 September 2026: Percify gives 10 credits with no card and adds no watermark; HeyGen's free plan allows 3 videos a month of up to a minute; Vidnoz gives 30 credits a day at 720p with a watermark; D-ID offers a 14 day trial of 3 minutes with a full screen watermark for personal use; Synthesia's Basic plan gives credits but no downloads.
Several are. InfiniteTalk released weights and code under Apache 2.0 on 19 August 2025, LatentSync is Apache 2.0, and MuseTalk is MIT. Wav2Lip's open version is non commercial, so it cannot be used for client work without a commercial licence.
