HeyGen vs Synthesia
A source-aware comparison of pricing, documented capabilities and workflow fit.
Short answer
- Price: not directly comparable — HeyGen is free tier available, Synthesia is pricing not verified.
- How to start: HeyGen is free tier available, Synthesia is pricing not verified.
- Where they differ: on what we checked they match — both offer public api and sso (saml).
These lines are generated from the pricing we track, not from a paid placement. How we score tools.
What HeyGen is
HeyGen creates avatar videos and translates existing footage into other languages with matched lip movement. Translating existing footage with matched lip movement is the feature that saves real money on localisation. Avatar output is convincing in short business formats and still recognisable as synthetic at length.
What Synthesia is
Synthesia produces videos of AI presenters speaking a script, in many languages, without filming. The practical use is internal material that would otherwise never be made — training modules, product updates, compliance briefings — where a studio shoot cannot be justified and a rewrite means re-recording. Changing a sentence means editing text and regenerating, not booking a camera again. It is weakest where a real presence matters: marketing that depends on a recognisable face.
Side by side
| HeyGen | Synthesia | |
|---|---|---|
| Category | AI Tools | AI Tools |
| How to start | Free tiernot a monthly price | Not verifiednot a monthly price |
| Public API | Yes | Yes |
| Mobile app | No | No |
| Open source / self-hostable | No | No |
| SSO (SAML) | Yes | Yes |
| Visit | HeyGen ↗ | Synthesia ↗ |
What HeyGen is built to do
- Avatar video
- Produces presenter video from a script without filming.
- Video translation
- Redubs footage into other languages with matched lip movement.
- Brand templates
- Reuses layouts and voices across a series of videos.
What Synthesia is built to do
- Script-to-video
- Paste a script and generate a presenter reading it, with no camera or studio.
- Multilingual output
- The same script rendered in many languages from one source.
- Edit and regenerate
- Revising the text regenerates the video, so updates do not mean re-recording.
- Custom avatars
- Paid tiers can build an avatar from footage of a real presenter.
Choose HeyGen if
- Teams localising video content across markets.
Choose Synthesia if
- Companies producing training or product videos at volume.
Evidence and freshness
Where a claim on this page comes from a vendor page, it is linked here.
HeyGen: pros & cons
- Video translation with lip sync
- Custom avatars from your own footage
- Fast turnaround
- Credit-based pricing runs down quickly
- Quality varies by language
- Consent and likeness issues need care
Synthesia: pros & cons
- No filming or studio needed
- Many languages and avatars
- Updating a video means editing the script
- Presenters still read as synthetic
- Priced per video minute
- Custom avatars cost extra
Our verdict on HeyGen
The translation feature is the standout. Get explicit consent for any real person's likeness.
Our verdict on Synthesia
Excellent for content that must be updated often. Marketing work where authenticity matters still needs people.