Model comparison
Compare Hedra Avatar and Express-3 using the same provider-sourced ai avatars & digital humans rubric. No mystery score and no invented benchmark ranking.
Facts checked September 4, 2026
Quick take
Hedra's audio-driven character model for creating talking videos from one image, one to four speakers, and optional performance direction.
Credit units are not dollars, and a ten-minute 1080p render can consume substantial capacity. Verify generation time, moderation, identity consent, storage, and the credit package behind the account.
Synthesia's business-video avatar model for script-aware speech, gestures, body motion, and multilingual presenter content inside a complete editor.
A plan can include Express-3 without including every API or custom-avatar feature. Confirm video limits, avatar consent, voice rights, brand workflow, downloads, and enterprise controls.
Compare the published facts
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| AI avatars & digital humans | Hedra Avatar | Express-3 |
|---|---|---|
| Price basisA representative current subscription, credit, minute, or generated-second price with its route identified. | 2.5–6.25 credits per generated second by resolution | Included in plans; paid subscriptions from $29/month |
| Delivery modeRealtime interactive streaming or an asynchronously rendered video. | Asynchronously rendered video | Platform-rendered presenter video |
| Source inputsImages, recordings, scripts, audio, prompts, or preset avatars accepted by the product. | One image, audio, and an optional behavior prompt | Script plus stock, builder, or approved custom avatar |
| Output & limitsPublished resolution, frame rate, session length, clip length, or other practical production limit. | 540p, 720p, or 1080p; clips up to 10 minutes | Plan-based video minutes; standalone model limits not published |
| Languages & voicesPublished language support and whether teams can bring or clone a voice. | Any supported input audio; Hedra speech and voice tools are optional | 160+ languages in the Synthesia platform |
| Performance controlGestures, emotion, direction, motion prompts, multi-speaker support, or similar controls. | Prompted behavior and one to four audio speakers | Lip sync, gestures, body motion, and script-aware sentiment |
| Where to use itDirect API, widget, editor, conferencing integration, or other first-party access route. | Hedra product and direct API | Synthesia editor; API availability depends on plan |
How to choose
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
The model guide does not state one complete retention or training-use commitment. Confirm current Hedra workspace, upload, consent, and enterprise terms before using identifiable or confidential media.
Provider and API links
Synthesia says customer inputs and outputs are not used to pre-train its models. Customer-directed fine-tuning and approved custom-avatar workflows are separate; follow consent and biometric-data requirements.
Provider and API links
Frequently asked questions
Hedra Avatar: Hedra's audio-driven character model for creating talking videos from one image, one to four speakers, and optional performance direction. Express-3: Synthesia's business-video avatar model for script-aware speech, gestures, body motion, and multilingual presenter content inside a complete editor.
Consider Hedra Avatar when your priority is Long-form talking-character video. Consider Express-3 when your priority is Multilingual training and internal communication. Test both with your own data and provider route before committing.
No. This comparison aligns provider-published facts for the AI avatars & digital humans category. It does not claim a universal winner or combine incompatible third-party benchmark scores.
