Pick HeyGen if you want the most lifelike avatar of yourself, longer videos on cheap plans (30 minutes on Creator at $29/month) and 175+ translation languages. Pick Synthesia if you make training video for a company: more included minutes per dollar on annual billing ($18/month), SOC 2 Type II plus ISO 27001 and ISO 42001, and an editor built for slide-style modules.
HeyGen vs Synthesia is the most common shortlist in AI avatar video. Both turn a script into a talking-presenter video, and both start at $29 a month.
They are built for different buyers. HeyGen chases realism and creator speed, while Synthesia chases the enterprise training team.
This comparison puts them side by side on the four things that decide the purchase: avatar quality, video length limits, language support and real cost per finished minute. Every price below comes from each vendor’s own pricing page, checked October 2026.
TL;DR — who wins each dimension
- Avatar realism: HeyGen. Avatar V builds a personal avatar from about 30 seconds of footage, with phoneme-level lip-sync.
- Stock avatar library: HeyGen. 1,100+ presenters vs Synthesia’s 240+ (Enterprise) or 125+ (Starter).
- Video length: HeyGen on cheap plans (30 minutes per video on Creator). Synthesia has no per-video cap, but a smaller monthly minute allowance.
- Languages: HeyGen for translation (175 languages and dialects). Synthesia for voices (1,000+ across 140+ languages).
- Price per finished minute: Synthesia on annual billing, about $0.80/minute on Starter.
- Security and compliance: Synthesia. SOC 2 Type II, ISO 27001 and ISO 42001.
- Free plan: Synthesia for minutes (10/month). HeyGen for a free custom avatar.
HeyGen vs Synthesia: overview
HeyGen is an AI avatar video platform for creators, marketers and sales teams, built around realistic personal avatars and one-click video translation, from $29/month. It also ships photo avatars, voice cloning and a Video Agent that drafts a video from a prompt.
Synthesia is an AI video platform for corporate training and internal comms, built around stock and studio avatars in a slide-based editor, from $18/month on annual billing. It adds dubbing, interactive surveys, roleplay Sessions and an AI agent called Syren.
The short version: HeyGen is a creative tool that scaled up to teams. Synthesia is a team tool that keeps getting more creative.
If neither fits, we compared the wider field in HeyGen alternatives and Synthesia alternatives.
HeyGen deep dive
HeyGen — AI avatar video and video translation in 175+ languages
HeyGen’s selling point is how real its avatars look. Its newest model, Avatar V, powers Personal Avatars that “look, move, and gesture like you”, with lips synced at the phoneme level and shots that range from wide to close-up.
You record about 30 seconds of video to camera, read a consent statement, and most avatars are ready in 10 to 20 minutes. From there one avatar can wear up to 500 outfits and settings without a reshoot.
HeyGen bills in credits, and the model you pick sets the burn rate. Per the HeyGen help center, Avatar III costs 4 credits a minute, Avatar IV costs 31 and Avatar V costs 48.
That spread matters. Creator’s 600 monthly credits buy 150 minutes on Avatar III but only about 12 minutes on Avatar V.
Pros
- Most lifelike personal avatars in this pair, built from roughly 30 seconds of footage
- 1,100+ stock presenters, with 700+ available on paid plans
- Videos up to 30 minutes on Creator and Pro, 60 minutes on Business
- 4K export from the Pro plan ($49/month)
- Video translation in 175 languages and dialects, with lip-sync from 6 credits a minute
- One custom video avatar even on the free plan
Cons
- Credit pricing is hard to predict: Avatar V burns 12 times the credits of Avatar III
- Creator exports cap at 1080p
- Business seats cost $20/month per added member on top of $149/month
- Compliance story is thinner than Synthesia’s: SOC 2 Type II and GDPR, no ISO certifications on the avatars page
Best for: Creators, marketers and sales teams who want a convincing avatar of themselves, and anyone translating existing video into many languages.
Pricing: Free (3 videos a month, 1 minute each, watermarked). Creator $29/month, or about $24/month billed yearly, for 600 credits. Pro from $49/month for 1,000 credits. Business $149/month for 1,500 credits. Enterprise is custom (HeyGen pricing, checked October 2026).
Synthesia deep dive
Synthesia — AI avatar video for business training and communication
Synthesia is built like a presentation tool that talks. You write a script, build scenes the way you would build slides, and drop a stock or personal avatar on each one.
Its avatars are full-body, with natural gestures and expressions. Personal avatars come from a short recorded video or a professional studio session, and a live on-camera consent recording “can’t be skipped or uploaded after the fact”.
Synthesia also bills in credits, but it publishes a rule of thumb. Its pricing FAQ says a typical finished minute uses about 100 credits, more if the avatar is on screen throughout.
On top of that, every plan, including the free one, gets 10 minutes of video or dubbing a month. That free allowance is why Synthesia Starter delivers about 22 minutes a month for $29.
Pros
- Best minutes per dollar on annual billing: Starter is $18/month for up to about 150 extra minutes a year
- Strongest compliance: SOC 2 Type II, ISO 27001, ISO 42001 and GDPR, per Synthesia’s avatar page
- 1,000+ AI voices across 140+ languages
- Slide-style editor that L&D and comms teams pick up fast
- Training extras: interactive surveys, roleplay Sessions, SCORM export for LMS upload
- Clear credit guide: about 100 credits per finished minute
Cons
- Smaller stock library: 9 avatars on Basic, 125+ on Starter, 180+ on Pro, 240+ on Enterprise
- No personal avatar on the free plan
- Full HD (1920 x 1080) downloads, no 4K listed
- Dubbing covers 70+ languages on self-serve plans; 140+ needs Enterprise
- Avatars read as polished presenters, less like a candid recording of you
Best for: L&D, HR and internal comms teams producing training modules, onboarding and policy video at scale, especially in regulated industries.
Pricing: Basic free (10 minutes a month, watermarked). Starter $29/month, or $18/month billed yearly, for 1,250 credits a month. Pro $89/month, or $64/month billed yearly, for 6,000 credits a month. Enterprise is custom (Synthesia pricing, checked October 2026).
HeyGen vs Synthesia: head-to-head comparison
| HeyGen | Synthesia | |
|---|---|---|
| Starting paid price | $29/month (about $24 billed yearly) | $29/month ($18 billed yearly) |
| Free plan | 3 videos/month, 1 min each, watermark | 10 min/month, watermark |
| Stock avatars | 1,100+ (700+ on paid plans) | 125+ Starter, 180+ Pro, 240+ Enterprise |
| Custom avatars | 1 on Free, 1+ on Creator and Pro, 5+ on Business | 3 on Starter, 5 on Pro |
| Avatar footage needed | About 30 seconds | Short video or studio session |
| Max video length | 1 min Free, 30 min Creator/Pro, 60 min Business | No per-video cap listed; limited by plan minutes |
| Export resolution | 1080p Creator, 4K from Pro | Full HD 1080p |
| Languages | 175 languages and dialects (translation) | 140+ languages, 1,000+ voices |
| Dubbing languages | 175 on paid plans | 70+ self-serve, 140+ Enterprise |
| Compliance | SOC 2 Type II, GDPR | SOC 2 Type II, ISO 27001, ISO 42001, GDPR |
| Best for | Creators, marketing, sales, translation | Training, HR, internal comms |
Prices and limits from HeyGen pricing and Synthesia pricing, checked October 2026.
Key differences that decide the purchase
Avatar quality
HeyGen wins on realism. Avatar V is trained on your own footage and keeps expressions consistent across clips, which matters when the avatar is meant to pass as you.
Synthesia’s avatars are cleaner and more presenter-like. For a compliance module, that consistency is a feature, not a flaw.
Test both with your own script. Lip-sync on product names and technical terms is where every avatar model still slips.
Video length limits
HeyGen sets a hard cap per video: 1 minute on Free, 30 minutes on Creator and Pro, 60 on Business. Enterprise removes it.
Synthesia doesn’t list a per-video cap on its pricing page. The practical limit is your minute allowance, so a 30-minute course on Starter eats more than a month of credits.
If you make long videos rarely, HeyGen’s cap is generous. If you make lots of short modules, Synthesia’s allowance stretches further.
Language support
HeyGen leads on translation: 175 languages and dialects on every paid plan, with lip-sync translation from 6 credits a minute. Free gets 30+.
Synthesia leads on voice choice: 1,000+ voices across 140+ languages for new avatar video. Its dubbing is narrower on self-serve plans, at 70+ languages.
For a deeper look at dubbing tools beyond these two, see AI video dubbing tools compared.
True cost per finished minute
Sticker prices match at $29. Cost per minute doesn’t.
| Plan | Billing | Avatar minutes you get | Cost per minute |
|---|---|---|---|
| HeyGen Creator, Avatar V (48 cr/min) | Monthly, $29 | About 12.5 | About $2.32 |
| HeyGen Creator, Avatar V | Yearly, about $24 | About 12.5 | About $1.92 |
| HeyGen Creator, Avatar IV video look (31 cr/min) | Monthly, $29 | About 19 | About $1.50 |
| Synthesia Starter (about 100 cr/min) | Monthly, $29 | About 22 incl. 10 free | About $1.32 |
| Synthesia Starter | Yearly, $18 | About 270 a year incl. free | About $0.80 |
Our math, from each vendor’s published credit rates and plan grants. Synthesia’s estimate rises when the avatar stays on screen the whole video.
HeyGen gets cheaper fast if you drop to Avatar III (4 credits a minute). You trade realism for volume.
Learning curve
Synthesia is easier for non-video people. Its scene editor feels like building slides, and templates cover the common training formats.
HeyGen’s studio is quick too, but the menu of avatar models, looks and credit rates takes a few videos to learn.
Which one should you pick?
Pick HeyGen if you:
- Want an avatar that looks and moves like you, for YouTube, LinkedIn or sales outreach
- Need videos longer than 20 minutes on a low-tier plan
- Translate existing videos into many languages with lip-sync
- Want 4K export without an enterprise contract
Pick Synthesia if you:
- Build training, onboarding or compliance video for a company
- Need ISO 27001 or ISO 42001 for procurement sign-off
- Produce lots of short modules and want the lowest cost per minute
- Want interactive surveys, roleplay and SCORM export in the same tool
Consider something else if you:
- Need an enterprise L&D suite with a course builder: see Colossyan alternatives
- Want to animate a single photo or run a live conversational avatar: see D-ID alternatives
- Already have real footage and only need it in other languages: an avatar is the wrong tool. A dubbing tool keeps the real speaker on screen
Conclusion: HeyGen vs Synthesia in 2026
HeyGen is the better AI avatar maker for realism, translation and long videos on cheap plans. If the avatar has to be you, start there.
Synthesia is the better pick for corporate training. On annual billing it delivers the most minutes per dollar, and its compliance stack clears procurement faster.
Both have free plans. Run the same 60-second script through each before you pay, and judge the lip-sync on your own product names.