Synthesia 3.0 review: full-body AI avatars, AI dubbing & pricing

Synthesia 3.0 is the biggest update the platform has shipped — full-body avatars that actually move, conversational "video agents" you can talk to, and AI dubbing that's good enough to ship. If you're producing training videos, sales enablement, or any "talking head" content at scale, this is worth your attention.

It's also the most expensive update they've ever shipped. Here's the honest breakdown of what's new, what's still rough, and who should actually pay for it.

Express 2: full-body avatars

The headline feature. Previous Synthesia avatars were waist-up cardboard cutouts — they looked great from the chest up and broke completely if you tried to do anything else.

Express 2 gives you a full body that walks, gestures with both hands, and shifts weight between feet. The motion isn't perfect (you'll catch the occasional weird limb), but it's the first AI avatar I've seen that doesn't immediately scream "AI" when shown at full height.

Video agents: conversational AI in a face

This is the sleeper feature. Video agents are interactive avatars your viewers can talk to. Embed one on a landing page, in a knowledge base, or in a training portal, and your audience asks questions out loud — the avatar answers in real time with synced lip movement.

Think internal helpdesk, sales agent, onboarding buddy. The use cases for B2B teams are obvious.

AI voice cloning and dubbing

Synthesia 3.0 ships proper voice cloning plus automatic dubbing into 140+ languages. You record yourself once, the system learns your voice, and every future avatar can speak in your voice across any language.

For global teams, this is the killer app. One script becomes 30 localized videos in an afternoon.

Interactive features and the AI screen recorder

Two smaller-but-useful additions:

• Interactive video — clickable hotspots, branching paths, in-video quizzes
• AI screen recorder — records your screen and automatically removes "umm"s, dead air, and pauses

The screen recorder is the kind of thing you don't realize you needed until you use it. It saves an hour of editing per recording.

The catches

Three things to know before you buy:

1. The uncanny valley is real. Express 2 is great, but extended close-ups still feel slightly off. Use medium shots.
2. Custom avatars cost serious money. A studio-recorded custom avatar is in the four-figure range. The stock library is fine for most use cases.
3. Strict content moderation. Synthesia blocks anything that could be a deepfake or political misuse. If your script gets flagged, you'll have to rewrite it.

Synthesia pricing: free vs. paid

The free plan gets you ~3 minutes of video per month with limited avatars. Paid plans start in the low hundreds per month and unlock the full library plus Express 2. For agencies and corporate teams it's worth it; for solo creators producing one video a week, it's overkill.

Who should buy it

• Yes: L&D teams, internal comms, B2B sales, multilingual content shops
• Probably: course creators, agencies with corporate clients
• No: YouTubers, TikTok creators, anyone making lifestyle/entertainment content

A cheaper, broader alternative

If you need more than just an avatar — scripts, hooks, B-roll, voiceover, captions, thumbnails — a single-feature tool isn't enough. The AI Media Machine bundles 12 AI apps into one workflow, including avatar generation, for the price of one Synthesia month. Try it for $1 and see whether you actually need a Synthesia subscription on top.