HeyGen vs Synthesia: Which AI Avatar Video Platform Is Better?
Choose HeyGen if you are a creator or small team who wants to translate real speaking videos while keeping the voice and lip-sync. Choose Synthesia if you are a company producing training and internal explainers at scale, with brand control and review workflows.
| HeyGen | Synthesia | |
|---|---|---|
| In one line | Avatar presenter videos and video translation | Enterprise AI avatar video platform built for training and explainers |
| Pricing | Free credits; subscription for longer videos | Limited free tier; real use needs a subscription, with custom enterprise pricing |
| Access | Reachable from mainland China | Reachable from mainland China |
| Tags | Avatars · Presenter · Translation | AI avatars · Training · Multilingual |
| Full review·Official site ↗ | Full review·Official site ↗ |
Pricing and features change often; check the official site before relying on them.
Key differences
HeyGen and Synthesia do the same core job: write a script, pick an avatar, and get a talking-to-camera video that you update by editing text rather than reshooting. Both have stock avatar libraries, both let you build a custom avatar from real footage, and both are multilingual. The differences lie in who they are built for and which step they do best.
- Positioning: HeyGen is friendlier to individuals and small teams, with free credits, subscriptions for longer videos, and photo avatars that create a talking presenter from a single picture. Synthesia behaves like enterprise software: brand kits for logos, fonts and colours, multi-user editing with comments, reviews and version history, and noticeable investment in security, compliance and access control. The flip side is a free tier that does very little, pricing that feels steep to individuals, and custom enterprise quotes.
- Multilingual focus: HeyGen’s headline is video translation — take a real person speaking, translate it while keeping their own voice, and re-sync the lips, with lip-sync that stands out in its category. Synthesia’s strength is multilingual voiceover and quickly turning avatar videos into many language versions, ideal for distributing one set of material to staff or customers in different countries.
- Drafting: Synthesia can generate a script and first-draft video from a document or web page. HeyGen offers layout templates for adding captions, images and backgrounds in the browser.
- Shared weaknesses: Avatars look mechanical in close-up and over longer videos, with limited expression and gesture, so neither suits content that needs emotional pull. Custom avatars require the subject’s consent on both. Synthesia also moderates political and news topics strictly.
Choose HeyGen if
- You already have footage of a real presenter and want cheap versions in other languages.
- You are a solo creator or small team who wants to try free credits before subscribing.
- You want a personal avatar so future videos only need new text.
- You only have a photo and want the lowest-effort way to a talking presenter.
Choose Synthesia if
- Training, onboarding or internal announcements must be produced steadily, in volume and to a standard.
- Several people work on each video and you need reviews, version history and permissions.
- Brand rules are strict and every video must use the same logo, fonts and colours.
- You have lots of existing documents and want scripts and drafts generated from them.
If you are in mainland China
Both are overseas services. Access and payment for HeyGen may not be smooth from mainland China; for Synthesia, too, confirm that your network and payment method work before committing. For Chinese narration, Synthesia’s Chinese voices are less natural than its English ones, so test on the free tier first; with HeyGen, likewise try a Chinese script before subscribing. Both deliver the most value on multilingual content aimed at overseas audiences.