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Synthesys vs HeyGen

A detailed head-to-head comparison to help you choose the right AI video tool.

7.8

Synthesys

AI Avatar & Voice Generation

VS
9.2

HeyGen

Marketing Teams

HeyGen wins with an overall score of 9.2/10. But the best choice depends on your specific needs — read on for the full breakdown.

Score Comparison

Ease of Use
8.2
9.5
Video Quality
7.8
9
Avatar Quality
8
9.4
Voice Quality
8.2
9
Value for Money
8
8.5
Features
8
9.3

Feature Comparison

FeatureSynthesysHeyGen
AI Avatar Generation
Text-to-Video
Text-to-Speech
Video Templates
Brand Kit
API Access
Custom Avatar Creation
Team Collaboration
Auto Subtitles

Pros & Cons

Synthesys

Pros

  • 140+ languages supported
  • Custom video avatars on all paid plans
  • UGC creator tools
  • Both video and voice generation
  • Currently 50% off promotions

Cons

  • Less known than HeyGen/Synthesia
  • Video quality slightly below top competitors
  • Pricing can be confusing with promotions
  • Smaller avatar library than leaders

HeyGen

Pros

  • Extremely realistic AI avatars with natural lip-sync
  • 175+ languages with 300+ voice options
  • Intuitive drag-and-drop video editor
  • Fast rendering times (under 5 minutes)
  • API available for automation

Cons

  • Free plan is very limited (1 credit only)
  • Custom avatar creation requires Business plan
  • Some avatar gestures can look repetitive
  • Video length limited per credit

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