Choose HeyGen if you need personalized avatar videos, sales messages, or fast marketing clips; choose Synthesia if you need polished training, onboarding, or internal communication videos at team scale. Both tools create avatar video, but they are optimized for different buying reasons.
The wrong comparison is "which one has more avatars?" The better question is where the video will be used, who approves it, and how often the workflow repeats.
Where HeyGen wins
HeyGen is strong for personalized video workflows. It fits sales, marketing, outreach, explainers, and short-form business videos where speed and variation matter.
Use HeyGen when you need to create many versions of a message or test avatar video without a heavy production process.
Where Synthesia wins
Synthesia is stronger for formal business video. Training, onboarding, internal updates, compliance-style explainers, and repeatable team content are better fits.
Use Synthesia when the video needs to feel controlled, structured, and easy to standardize across a company.
Where Runway fits
Runway ML is not a direct avatar-video replacement. It belongs in the comparison when you need generative scenes, cinematic clips, or creative video assets instead of presenter-led content.
Quick comparison
| Tool | Starting price | Core job | Best fit |
|---|---|---|---|
| HeyGen | From $29/mo | avatar and personalized videos | Sales and marketing messages |
| Synthesia | From $29/mo | structured avatar videos | Training and internal comms |
| Runway ML | From $15/mo | generative video | Creative and cinematic clips |
Which one should you use?
Choose HeyGen if the video is external, personalized, or campaign-driven. Choose Synthesia if the video is internal, repeatable, and part of a learning or communication system. Choose Runway when avatar presentation is not the core format.
FAQ
Is HeyGen cheaper than Synthesia? The woska directory lists both from $29/mo, but plan limits change often. Check current vendor pages before buying.
Which is better for training videos? Synthesia is usually the safer starting point for training, onboarding, and standardized internal video.
Which is better for sales outreach? HeyGen is usually better for personalized sales videos and short campaign clips.
Related guides
*Ratings and pricing reviewed monthly. Last updated July 2026.*