sync. (sync.so) review 2026. Honest scoring on lip sync accuracy, visual dubbing, the sync-3 model, API, pricing, scope limits, and who should actually buy it.
sync. is one of the best dedicated lip sync and visual dubbing engines you can buy in 2026 — the sync-3 model holds a clean sync through close-ups, occlusions, and hard angles, and the API-first design slots it neatly into real pipelines. It is also a single-capability tool: it re-syncs a mouth on footage you already have and does nothing else, so buy it for dubbing and localization, not as a content engine.
sync. (at sync.so, from sync.labs) does one thing and does it unusually well: it makes a face's mouth match new audio. Dub a video into another language, swap in a re-recorded voiceover, or fix lips that drifted after a script change — sync. re-renders the mouth so the result stops looking like an overdub. The company came out of Y Combinator and was founded by the team behind Wav2Lip, the open-source lip-sync project a lot of this field grew out of.
I run a competing product (Kompozy), so let me be precise about what is and isn't a fair fight here. sync. is not an all-in-one content tool and does not pretend to be — comparing it to a full generation-and-publishing engine on breadth would be a straw man. The honest review is about how good it is at its actual job, and where its narrow scope will leave you assembling the rest of a workflow yourself.
The short version: as a lip-sync and dubbing specialist, sync. is excellent and I'd recommend it for that. As the center of a content operation, it isn't one, and it was never trying to be. This review scores it on its lane and tells you plainly where that lane ends.
sync. is an AI lip sync and visual dubbing platform. You upload a video, give it a voice — clone an existing one, generate a new one, or keep the clip's own audio — and the model re-renders the speaker's mouth to match. Its flagship sync-3 model builds a whole-shot understanding of the person and generates frames together rather than stitching isolated snippets, which is what keeps the sync stable through close-ups, occlusions, extreme angles, and low light. Earlier models including the zero-shot lipsync-2 and lipsync-2-pro remain available, alongside a react-1 model for expression-driven output. The platform is API-first as much as it is an app. You can work in a web Lipsync Studio, call the models through an API and SDKs, or run them inside Adobe Premiere Pro and ComfyUI via plugins. It also ships a watermark scheme for provenance, so a video modified with sync. can be verified as such. What it deliberately is not: a text-to-video generator, a script or caption writer, an image tool, or a publisher. It returns a synced MP4.
The clearest fit is anyone who already has footage and needs the mouth to match different audio — localization teams dubbing one hero video into many languages, course creators and marketers swapping re-recorded narration without a reshoot, agencies cleaning up lip drift after edits, and developers who want to embed lip sync into their own product through an API. If you have no source footage, or your real problem is producing and distributing content rather than fixing a specific clip, sync. is the wrong center of gravity — it has nothing to generate from and no way to publish what it makes.
| Dimension | Score | Why |
|---|---|---|
| Lip sync accuracy (sync-3) | 4.7 / 5 | Best-in-class. Holds a convincing sync through close-ups, occlusions, hard angles, and low light. |
| Visual dubbing / localization | 4.4 / 5 | Re-syncs one presenter into many languages cleanly; the strongest practical use case. |
| Model range and roadmap | 4.3 / 5 | sync-3 flagship plus zero-shot lipsync-2, lipsync-2-pro, and react-1, with an active shipping cadence. |
| API & developer experience | 4.5 / 5 | API-first with SDKs and native Premiere/ComfyUI plugins — built to slot into a real pipeline. |
| Web studio ease of use | 4.0 / 5 | Lipsync Studio is straightforward: upload, pick a voice, render. Not much to learn. |
| Pricing transparency & value | 3.8 / 5 | Public tiers and a free trial, but per-second usage on top of the plan is harder to predict at volume. |
| Scope / breadth of capability | 2.0 / 5 | Single-capability by design. No generation, captioning, clipping, or publishing. |
| Output provenance / safety | 4.0 / 5 | Built-in watermarking lets you verify a video was modified with sync. — a responsible touch. |
| Documentation | 4.0 / 5 | Solid model docs and API references; the developer-facing material is the strong point. |
sync. prices on a public page with no smoke. There is a free way to try it, then paid tiers that at the time of writing ran Hobbyist at $5/month, Creator at $19/month, Growth at $49/month, and Scale at $249/month, each with a per-second usage charge layered on top, plus a custom Enterprise tier. The plans ladder sensibly: longer maximum video length, more concurrent jobs, more voice clones, and progressively larger usage discounts as you climb.
The model is fair for what it is, but you have to read it correctly. The monthly fee is mostly an access and limits tier; the real cost is the per-second usage on the video you actually generate. For occasional dubbing that is cheap and efficient. For high, daily volume it becomes a variable line item you need to forecast — and the cheapest tiers also watermark the output, so any professional use effectively starts at the $19 Creator plan.
The honest framing on value: sync. is priced like the focused utility it is, not like a full content suite, and that is appropriate. Just budget for it as one tool among several. You will still pay separately for whatever writes your copy, generates your images, and publishes your posts — sync. covers the lip sync and nothing adjacent.
| Use case | Fit | Why |
|---|---|---|
| Dubbing one video into multiple languages | Strong | This is sync.'s sharpest use case — re-sync a real presenter's mouth to translated audio, no reshoot. |
| Fixing lip drift after a re-recorded voiceover or script edit | Strong | Re-syncing existing footage to corrected audio is exactly what the model is built for. |
| Embedding lip sync into your own product via API | Strong | API-first with SDKs and editor plugins makes it a clean integration target. |
| Localizing a talking-head course or marketing video | Strong | Keeps the original presenter on screen while the language changes — better than a voiceover-only dub. |
| Generating content from a brief or topic | Weak | No generation layer. sync. needs source footage and produces nothing on its own. |
| Captioning, reframing, and publishing across platforms | Weak | It returns an MP4; there is no caption, resize, or publishing step in the product. |
| Maintaining brand voice across written posts | Weak | No persona or voice system. sync. doesn't write anything to govern. |
| Running a full multi-platform content operation | Weak | Out of scope by design — it's a lip sync specialist, not a content engine. |
Kompozy and sync. sit in different categories, and the honest comparison says so. sync. is a lip-sync and dubbing specialist that perfects the mouth on footage you already have. Kompozy is a content generation and publishing engine: it writes copy in your voice through a Persona Brief, generates avatar video (Persona Shorts, Persona HeyGen), images, carousels, blogs, and newsletters, then captions, reframes, schedules, and publishes across nine platforms. Kompozy does not re-sync existing footage, and sync. does not generate or publish content. Neither replaces the other.
Where they meet is the handoff. A sync.-dubbed video is an excellent input to Kompozy: localize your hero clip in sync., then let Kompozy fan each language version into a market's worth of captioned, scheduled posts and supporting copy. If your shortage is "a clean dub," sync. is the buy. If your shortage is "enough finished content going out every week," that's Kompozy's job — and the two pair cleanly rather than compete.
If you need lip sync or visual dubbing on footage you already have, yes — sync. is one of the best dedicated engines for it, and the sync-3 model holds up well in hard conditions. If you expected an all-in-one content tool that writes, generates, and publishes, it isn't that and was never meant to be.
sync-3 is sync.'s flagship lip-sync model. Rather than stitching isolated frames, it builds a whole-shot understanding of the person and generates the frames together, which keeps the sync convincing through close-ups, occlusions, extreme angles, and low light. Older models like the zero-shot lipsync-2 remain available.
There is a free trial, then paid plans that started around $5/mo (Hobbyist), $19/mo (Creator), $49/mo (Growth), and $249/mo (Scale), each with a per-second usage charge on top, plus custom Enterprise. Watermark-free output begins on the $19 Creator tier. Check sync.so/pricing for current numbers.
No. sync. re-animates the mouth on existing footage to match new audio. It is a lip sync and dubbing tool, not a text-to-video generator. For talking-head video created from scratch, you'd want a tool like HeyGen or Kompozy's Persona formats.
Yes — visual dubbing is one of its strongest uses. Feed a translated voiceover and the on-screen presenter's mouth re-syncs to the new language, so the dub looks native instead of like an obvious overdub. sync. supports a wide range of languages; check its docs for the current list.
Pick sync. if your job is lip sync or dubbing on footage you already filmed. Pick Kompozy if your job is generating and publishing a full content stream across platforms. They're different layers — many creators dub in sync., then use Kompozy to caption, fan out, and publish the result.
The free and Hobbyist tiers carry a watermark. Watermark-free output starts on the $19/mo Creator plan. Separately, sync. uses a provenance watermark scheme so a video can be verified as having been modified with the tool — that's a transparency feature, not the visible plan watermark.