HeyGen vs Synthesia
as AI assistants see them, week of 2026-09-28
HeyGen edges out Synthesia in how AI assistants talk about AI video generators. HeyGen lands an overall score of 40 (ChatGPT 34, Claude 40, Perplexity 50) and gets named in 38 of 62 answers, while Synthesia scores 25 overall (ChatGPT 24, Claude 31, Perplexity 23) and is named in 25 of 62 answers. Head-to-head, HeyGen comes out ahead on 9 questions, Synthesia on just 1, with 10 ties. Both show up fully for lip sync in other languages and talking-head videos from a script, and both are never named for open-source models, footage cleanup, or commercial licensing questions.
Head to head
| metric | HeyGen | Synthesia |
|---|---|---|
| score | 40 | 25 |
| questions won | 16 | 13 |
By assistant
HeyGen
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 34 | 40% of answers | #2.1 |
| Claude | 40 | 75% of answers | #6.8 |
| Gemini | not sampled this week | ||
| Perplexity | 50 | 65% of answers | #2.9 |
Synthesia
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 24 | 30% of answers | #2.5 |
| Claude | 31 | 60% of answers | #7.2 |
| Gemini | not sampled this week | ||
| Perplexity | 23 | 30% of answers | #3.0 |
Where they differ
Only HeyGen gets named for
- What's the best AI video tool for social media ads?
- What's the best AI video tool for creators on a budget?
- Which AI video generator handles the longest clips?
- What's the best AI tool to animate a still image into video?
Only Synthesia gets named for
- Which AI video tool produces the most realistic footage?
More comparisons
Not sold on either?
Scores count how often each assistant names a product, weighted by position. How the score works · Full AI video generators leaderboard