Synthesia vs HeyGen
The same facts the Atlas reads for every tool, side by side, each with its page and date. No winner: which fits depends on the job.
Where they differ
visits a month · estimate · log scale
- 1.6×HeyGen gets about 1.6× the visits of Synthesia.visit estimates, read 2026-09-17
- $18Synthesia starts lower: $18/mo against $29/mo.pricing pages, read 2026-09-20 and 2026-09-17
- FreeBoth have a free plan.pricing pages, read 2026-09-20 and 2026-09-17
- SOC 2Only HeyGen names SOC 2 on its pages.their trust and security pages
Price & plans
| Price & plans | Synthesia | HeyGen |
|---|---|---|
| Price | Free plan · From $18/mopricing page, read 2026-09-20 | Free plan · From $29/mopricing page, read 2026-09-17 |
| Free plan | Yespricing page, read 2026-09-20 | Yespricing page, read 2026-09-17 |
| Paid plans from | $18/mopricing page, read 2026-09-20 | $29/mopricing page, read 2026-09-17 |
Who it's for & what it does
| Who it's for & what it does | Synthesia | HeyGen |
|---|---|---|
| What it is | Generates studio-quality videos from text scripts using AI avatars and voiceovers in 160 languages, with translation and analytics. | Generates realistic AI videos with lifelike avatars, voice cloning, and multilingual translation from text or existing footage. |
| For | Teams and individuals creating AI video content for training, marketing, and internal communications | Creators, marketers, and teams making video content without cameras or production crews |
| What people do with it |
|
|
| How it runs | Hosted only | Hosted only |
| Shelf | Marketing | Marketing |
Use & momentum
| Use & momentum | Synthesia | HeyGen |
|---|---|---|
| Use | ||
| Visits | ≈ 122k visits/moestimate, read 2026-09-17 | ≈ 189k visits/moestimate, read 2026-09-17 |
| iPhone app | none found | iPhone & iPad · 4.8★ from 26.8k ratingsiPhone & iPad · updated 2026-10-05 |
| Activity | Actively maintainedsite updated 9 days ago | Actively maintainedrelease 11 days ago · site updated yesterday |
Your data & compliance
| Your data & compliance | Synthesia | HeyGen |
|---|---|---|
| Trains AI on your data | not stated on the pages we read | Yes, you can opt outtheir words |
| Certifications | none named on their pages | SOC 2 Type II · GDPR · CCPAtheir words |
For developers: API & MCP
| For developers: API & MCP | Synthesia | HeyGen |
|---|---|---|
| API docs | synthesia.io/apithe vendor's page | app.heygen.com/developers/apithe vendor's page |
The company
| The company | Synthesia | HeyGen |
|---|---|---|
| Run by | Synthesia Limitedsite footer | HeyGen Technology Inc.privacy policy |
| Founded | 2017per Wikidata | not on record |
| Domain since | not on record | 2015domain registered |
| Raised | not on record | $500Mper their About page |
| Headquarters | Londonper Wikidata | Los Angelesper Wikidata |
What is the difference between Synthesia and HeyGen?
Synthesia: Generates studio-quality videos from text scripts using AI avatars and voiceovers in 160 languages, with translation and analytics. HeyGen: Generates realistic AI videos with lifelike avatars, voice cloning, and multilingual translation from text or existing footage.
Which is cheaper, Synthesia or HeyGen?
Synthesia starts at $18/mo (pricing page, 2026-09-20); HeyGen starts at $29/mo (pricing page, 2026-09-17). Plans and limits differ; both pages are linked above.
Which is more widely used, Synthesia or HeyGen?
Synthesia: about 122k visits/mo; HeyGen: about 189k (estimates, 2026-09-17).
Do Synthesia or HeyGen train AI on your data?
Synthesia: its pages do not say plainly. HeyGen: yes, you can opt out, in its own words: “You may have the right to object to our processing of personal information, including to object to (i.e., opt out of) your information being used to train our models, by contacting us at [email protected] You can also object to marketing at any time by using the unsubscribe/opt-out function displayed in our communications to you.”
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.