HeyGen and Synthesia both compete for the same broad job: turn a script into a professional-looking AI avatar speaking it, in a language and voice your audience understands. Both are general-purpose platforms aimed more at corporate training, explainers, and internal communications than ecommerce ad creative — neither ingests a product URL or publishes directly to an ad account.
The meaningful differences show up in how each one prices and structures usage, and in the depth of enterprise governance tooling.
HeyGen offers 500+ stock avatars at the free tier alone, with custom digital twins on paid plans (1 on Creator/Pro, 5 on Business) and lip-sync across 175+ languages.
Synthesia offers a smaller free-tier library (9 stock avatars on Basic) that scales up through paid tiers to 240+ on Enterprise, with 3–5 personal avatars on Starter/Creator and translation across 160+ languages.
At the free and entry tiers, HeyGen's avatar selection is broader. At the enterprise tier, Synthesia's avatar count and governance features (brand kits, SSO, SCORM export) pull ahead for large organisations standardising avatar video across departments.
This is the structural difference that matters most:
HeyGen meters by credits — premium avatar footage is billed per second, so a Creator plan's 600 credits ($29/month) cover a limited amount of premium avatar video, with lighter avatars costing less.
Synthesia meters by video minutes per month — Starter ($29/month) caps at 10 minutes, Creator ($89/month) at 30 minutes, regardless of how many separate videos that's split across.
| HeyGen | Synthesia | |
|---|---|---|
| Free tier | 3 videos/month, 500+ avatars | 10 min/month, 9 avatars |
| Entry paid | $29/month, 600 credits | $29/month, 10 min/month |
| Mid-tier | $49/month, 1,000 credits, 4K | $89/month, 30 min/month |
| Metering unit | Credits (per second of footage) | Minutes (per month) |
For a small number of longer videos, Synthesia's minutes-based model is easier to predict. For many short clips, HeyGen's credit system is generally more economical since credits scale down with lighter-weight avatars.
Sellable turns a single product photo into studio-quality images, UGC-style video ads, and on-brand campaigns — in under 60 seconds.
Try Sellable free →HeyGen for teams that want a larger avatar selection at lower entry cost, and more flexibility producing many shorter pieces of content.
Synthesia for enterprise L&D and compliance teams that need governance features (SSO, SCORM, brand kits) and are comfortable with a minutes-based quota for a smaller number of longer, more polished videos.
Neither is built for ecommerce ad-creative workflows — for that, purpose-built tools like Creatify or Arcads are closer fits, and neither one touches product photography, which is Sellable's core function.
At the free and entry tiers, HeyGen (500+ stock avatars) has a larger selection than Synthesia (9 on free Basic, scaling to 240+ on Enterprise). Synthesia's advantage shows up at the enterprise tier with governance and brand-management features layered around the avatars.
At comparable entry tiers ($29/month each), HeyGen's credit-based system generally stretches further for producing multiple shorter videos, while Synthesia's minutes-based cap is simpler to reason about for a smaller number of longer videos.
No — neither HeyGen nor Synthesia connects directly to Meta, TikTok, or Google ad accounts. Both export video for manual use elsewhere.
Neither is purpose-built for that workflow. Both can technically produce an avatar-led ad, but tools like Creatify (product-URL ingestion, ad-account publishing) are more directly built for ecommerce ad creative than either HeyGen or Synthesia.
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