HeyGen makes a synthetic presenter speak your script, and translates existing video into other languages with the lip movement matched. All of it happens on its servers. Montaj is a HeyGen alternative for the opposite job: the person on screen is really you, and the clip needs subtitles, the dead air gone and a clean voice track. Done on your device, with nothing uploaded.
You want to publish in languages you do not speak with the lips matching, or you want a presenter on screen without filming one.
Choose Montaj if…
You filmed yourself, and the clip needs captioning, tightening and cleaning before it goes out.
Montaj vs HeyGen at a glance
Feature
Montaj
HeyGen
Where your video goes
Nowhere. It stays on your device
Uploaded to HeyGen, where the generation and translation run
Video translation with lip-sync
Not offered
The signature feature
Realistic AI avatars
Not offered. The person on screen is the one you filmed
A core part of the product
Turning a photo or an audio file into video
Not offered
Supported alongside script-to-video
Word-by-word subtitles on a real take
On-device transcription, editable inline with word-level timing
Captions follow the script it was given
Removing dead air and cleaning the voice
One-tap silence removal plus an on-device neural denoiser
Not the problem it solves, the delivery is generated
Works offline
Fully offline after the one-time model download
Cloud generation, it needs a connection
Price
Free today, no watermark
Free plan with limits; paid subscription plans
The honest summary: HeyGen wins on reach: lip-synced translation and realistic avatars open doors no editor can. Montaj wins on the original take, which it finishes on your device for free.
Categories
Why a HeyGen alternative is not another avatar generator
HeyGen exists so a message can be delivered by someone who was never in the room. An avatar, or you, dubbed into a language you have never spoken. It is a distribution tool disguised as a video tool.
Montaj exists so the take you actually shot stops looking like a rough draft. There is no generation in it anywhere, and that is a design decision rather than a gap waiting to be filled.
Winner: HeyGen for synthetic delivery; Montaj for the real one
Privacy
HeyGen vs Montaj on where your face ends up
Avatar work and lip-synced dubbing require the source video on HeyGen's servers; there is no other way to do it. Worth knowing, given the source video is usually your face.
Montaj keeps the whole pass local:
On-device transcription, then word-by-word karaoke subtitles with word-level timing.
One-tap silence removal, reversible and non-destructive, with 100-step undo.
Neural voice denoising running on the device.
A self-verifying export that checks duration, dimensions, audio and decoded frames.
Winner: Montaj, nothing is uploaded
Honest limits
Where HeyGen wins
Lip-synced translation is the strongest single feature in this whole directory for anyone trying to reach an audience beyond their own language, and Montaj does not translate at all. Avatars, cloning and image-to-video are equally out of reach.
Montaj is vertical 9:16 only, single-user, and does not yet save projects, closing one loses it.
Winner: HeyGen, translation and synthetic presenters
The verdict
The lip-synced translation is the thing worth paying for here. Watching your own video come back in another language with the mouth matching is not a gimmick, it is a distribution strategy. If that is the plan, take HeyGen. Montaj is the tool for the step before anyone thinks about languages: making the original take watchable at all, on the device it was filmed on, without it going anywhere.
For avatars and lip-synced translation, the alternatives are other generative platforms and Montaj is not one. For finishing a real recording on your device, Montaj is the strongest HeyGen alternative, free and with nothing uploaded.
Can Montaj translate or dub my video?
No. Montaj transcribes on your device and does not translate or dub. If reaching another language is the goal, HeyGen is built for it.
Does HeyGen upload my video?
Yes. Avatar generation and lip-synced translation both run on its servers, so the source video is uploaded. Montaj processes everything on your device.
Is there a video editor that keeps my face off the cloud?
Montaj runs transcription, subtitles, silence removal and denoising on your device, so your video never leaves it.