HeyGen and Synthesia both turn a written script into an avatar-led video without cameras, actors, or studios, but they are built around different core jobs.…
| HeyGen | Synthesia | |
|---|---|---|
| Primary category | AI Video Generation | AI Video Generation |
| Rating | Not documented | Not documented |
| Pricing model | Freemium | freemium |
| Starting price | Free (3 videos/month); paid plans from $29/month | Free (paid plans from $18/month billed annually) |
| Free plan | Yes | Yes |
| Free trial | Not documented | Not documented |
| Platforms | Web | Web |
| Team collaboration | Not documented | Not documented |
| AI features | Yes | Yes |
| Public API | Yes | Yes |
Company origin & maturity
HeyGen: Founded 2020 in Los Angeles, California
Synthesia: Founded 2017 in London, UK — three years longer track record
A longer operating history can correlate with more mature enterprise processes and support
Entry-level paid pricing
HeyGen: Creator plan starts from $29/month
Synthesia: Starter plan starts at $18/month billed annually ($29/month billed monthly)
Synthesia's annual pricing is nominally cheaper at entry level for buyers willing to commit yearly
Free plan limits
HeyGen: Free plan gives a limited number of videos per month with a watermark; usage is credit/video-based rather than a stated minute cap
Synthesia: Free plan is explicitly capped at 10 minutes of video per month with 9 stock avatars and a watermark
Knowing the exact free-tier limit matters for anyone testing before buying
Voice cloning
HeyGen: Explicit Voice Cloning feature generates a voice from a short sample
Synthesia: Offers a large AI voice/text-to-speech library, but a dedicated voice-cloning feature is not documented
Voice cloning lets creators keep a consistent, personal vocal identity instead of picking a generic AI voice
Real-time conversational avatars
HeyGen: Interactive Avatars can respond to viewers in real time for live presenter/support use cases
Synthesia: Not documented as offering real-time conversational avatars
Real-time interactivity supports live use cases like virtual receptionists or support agents, beyond pre-rendered video
Interactive video elements
HeyGen: Not documented
Synthesia: Interactive Video adds clickable buttons, branching paths, and embedded forms inside pre-rendered videos
Branching, clickable video matters for training modules and lead-gen content where viewer choices affect the path
Source-content import
HeyGen: Not documented
Synthesia: PowerPoint & Document Import converts existing slide decks and documents directly into narrated avatar videos
Teams with an existing library of decks can repurpose that content without rebuilding scripts from scratch
Bulk/personalized video generation
HeyGen: API Access supports programmatic generation, but bulk spreadsheet-driven personalization is not documented
Synthesia: API & Bulk Personalization explicitly generates many personalized variants at once from a spreadsheet of names or data fields
Bulk personalization is essential for scaled use cases like personalized sales outreach or onboarding across many employees
Learning-management export
HeyGen: Not documented
Synthesia: Enterprise plan includes SCORM export for direct integration into learning-management systems
SCORM compliance is a hard requirement for many corporate LMS platforms
Usage-limiting model
HeyGen: Paid tiers are credit-based, with a monthly credit allowance for video generation
Synthesia: Paid tiers are minute-based with an annual allowance (e.g., up to 120 minutes/year on Starter, 360 on Creator)
Credits vs. minutes changes how usage gets budgeted and how overages are likely handled
| Feature | HeyGen | Synthesia |
|---|---|---|
| Stock AI avatar library | Available | Available |
| Custom/personal digital-twin avatar | Available | Available |
| Documented consent process for personal-likeness avatars | Not documented | Available |
| Feature | HeyGen | Synthesia |
|---|---|---|
| Multi-language voice library | Available | Available |
| Voice cloning from a sample | Available | Not documented |
| Video translation & dubbing | Available | Available |
| Feature | HeyGen | Synthesia |
|---|---|---|
| Script-to-video generation | Available | Available |
| Prebuilt templates (ads, demos, training) | Available | Not documented |
| AI-drafted script/video from a prompt or document link | Not documented | Available |
| PowerPoint/document import | Not documented | Available |
| Feature | HeyGen | Synthesia |
|---|---|---|
| Real-time conversational avatars | Available | Not documented |
| Clickable/branching interactive video | Not documented | Available |
| Feature | HeyGen | Synthesia |
|---|---|---|
| API access | Available | Available |
| Bulk/spreadsheet-driven personalization | Not documented | Available |
| Feature | HeyGen | Synthesia |
|---|---|---|
| Team workspaces / shared collaboration | Available | Available |
| SSO/SAML | Available | Available |
| Brand kit / brand asset management | Available | Available |
| SCORM export for LMS | Not documented | Available |
| Feature | HeyGen | Synthesia |
|---|---|---|
| Free plan | Available | Available |
| Custom Enterprise pricing tier | Available | Available |
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Pros
Cons
Pros
Cons
Synthesia's entry-level Starter plan is nominally cheaper at $18/month if billed annually ($29/month billed monthly), while HeyGen's Creator plan starts at $29/month; both also offer free plans with watermarks and limited usage, so the cheaper pick depends on whether you can commit to an annual Synthesia contract.
Both are designed for non-editors — you write or paste a script, pick an avatar and voice, and the tool renders the video — so beginners can get started on either; HeyGen's free plan and lower monthly Creator price make it slightly more approachable for individuals just testing the concept, while Synthesia's slide-like editor and PowerPoint import suit beginners who already have existing training content to repurpose.
Yes, both tools offer dedicated video translation and dubbing that adjust lip-sync to match translated audio — HeyGen markets this as Video Translation & Dubbing and Synthesia as Multilingual Dubbing & Translation, with Synthesia documenting coverage of well over 100 languages.
Yes, both provide API access for programmatic video generation, though Synthesia explicitly documents an additional bulk personalization capability for generating many customized video variants at once from a spreadsheet, which is not documented for HeyGen.
Synthesia documents specific avatar counts that scale with plan tier — 9 on the free plan up to 240+ on Enterprise — while HeyGen describes only a 'large library' of stock avatars without a published count, so an exact side-by-side comparison isn't possible from documented data.
HeyGen has a dedicated Voice Cloning feature that generates a voice from a short sample, while Synthesia's documented AI Voices & Text-to-Speech feature offers a large voice library but does not document a personal voice-cloning capability.
Read the full HeyGen review · Read the full Synthesia review