Runway Act-Two vs sync.
7 facts side by side from each company’s published specs and prices, plus our same-brief bench where both have run it. By GoCrazyAI Lab, method here.
Runway Act-Two
by Runway · Act-Two
sync.
by sync. labs · sync-3
The short answer
sync. wins 4 of the 4 rounds a number or a yes/no can decide, Runway Act-Two takes 0. In the Best lip-sync AI tools guide Runway Act-Two is #5 (Best for acting out a character) and sync. is #2 (Best for re-syncing real footage).
Runway Act-Two wins
0 / 4
Act-Two maps your own filmed performance onto a character, lips, face and body, so the delivery is exactly yours. Clips are short, capped at 30 seconds.
sync. wins
4 / 4
sync-3 is a dedicated lip-sync model that copes with close-ups, profiles and partly covered faces, outputs up to 4K and takes photos too. Per-second pricing and editor plugins make it the professional default.
Round by round
Bold marks the winner of a row; rows without a number or yes/no have no winner. As published, checked September 25, 2026.
| Spec | Runway Act-Two | sync. |
|---|---|---|
| Cheapest paid plan | $15/mo (Standard, 625 credits) | $5/mo + $0.05 per second (Hobbyist, watermarked) |
| Works from | Your performance video + a character image or video | Video or photo, with audio or text |
| Longest job | 30 min | 60 min |
| Languages | Any: follows your performance | 95+ |
| Top resolution | 720p | Up to 4K (sync-3) |
| API | Not published | Yes |
| No-cost plan | Trial credits, but Act-Two needs Standard or higher | Yes: 3 generations a month, 20 seconds each |
By the numbers
- Runway Act-Two30 sec
- sync.1 min
- Runway Act-Two$15
- sync.$5
See them work
Runway Act-Two: what we like
- Transfers your whole facial performance, not only the lips.
- Works on stylised, animated and non-human characters.
Watch out for
- Clips are capped at 30 seconds at 720p.
- Not available on the no-cost plan.
sync.: what we like
- Handles close-ups, profiles and partly covered faces on real footage.
- Pay per second, with an API, SDKs and plugins for Premiere, Resolve and ComfyUI.
Watch out for
- The $5 plan keeps a watermark; the first plan without one is $19.
- Long jobs need higher tiers: one minute per job on Hobbyist, 30 on Scale.
Make it on GoCrazyAI
Make the whole thing on GoCrazyAI
Make the photo talk or sing in the Lip Sync Studio, and prepare the voice, song and footage around it, all on the same credits from $9.99 a week.
Frequently asked questions
Which is cheaper to start, Runway Act-Two or sync.?
Runway Act-Two starts at $15/mo (Standard, 625 credits); sync. at $5/mo + $0.05 per second (Hobbyist, watermarked). No-cost tier: Runway Act-Two trial credits, but act-two needs standard or higher, sync. yes: 3 generations a month, 20 seconds each. Prices as published on each company's pricing page, checked September 25, 2026.
Longest single job on the cheapest paid plan: Runway Act-Two or sync.?
Runway Act-Two: 30 sec. sync.: 1 min.
Can I use either on GoCrazyAI?
Runway Act-Two is a separate product; the GoCrazyAI tools below do the same job on one subscription. sync. is a separate product; the GoCrazyAI tools below do the same job on one subscription.
Sources
- Runway Act-Two: Runway Act-Two help
- Runway Act-Two: Runway pricing
- Runway Act-Two: Runway on lip sync and consent
- sync.: sync. pricing
- sync.: sync-3 model docs
- sync.: sync. terms
GoCrazyAI publishes this comparison. Product names are trademarks of their owners; neither company sponsored, reviewed or endorsed this page. Facts are summarised from the sources above and may have changed since the dates shown.
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