HeyGen vs Synthesia

HeyGen makes AI videos of you, or a custom avatar, saying anything you type.

Record a short training clip once. HeyGen builds an avatar that lipsyncs to written scripts and looks convincingly like the person it was trained on. From there you can generate hundreds of personalized videos at scale, swapping in different names, companies, or details pulled from a spreadsheet or CRM.

This isn't meant to replace hero brand video. It replaces the videos no one was ever going to record by hand because the math didn't work: one-to-one welcome videos for new prospects, named follow-ups after demos, conference invitations that say each recipient's company out loud.

Common workflows by role:

• Sales reps send personalized prospect outreach videos at scale
• Customer success teams record onboarding videos for new accounts
• Marketers run named-account campaigns where each contact gets their own clip
• L and D teams produce localized training without re-recording per market

The avatar can speak in 30+ languages with reasonable lipsync, so the same recorded performance carries into markets where the speaker doesn't know the language. Quality varies by language and use case, so review output before sending anything sensitive.

There's also an API for plugging into your CRM and triggering video generation off lead events. A new demo request lands, HeyGen renders a personalized welcome from the AE, and the email sequence drops it into the next touch. No manual rendering, no batching nights before a campaign launch.

A few specifics worth knowing:

• Custom avatars require a short training video that you submit
• Stock avatars are available for teams that don't want to put a real face on camera
• Voice cloning runs on a short sample of the speaker's voice
• Output formats cover horizontal, vertical, and square for different channels

The consent and disclosure piece matters here. Cloning a real person needs their permission, and audiences should know they're watching an AI video. HeyGen's terms cover this, and most teams add a soft disclosure in the script.

Freemium model with paid subscription tiers scaling by minutes of video generated and team seats. An API tier is available for production integrations where volume needs to flow programmatically.

Best for personalized outreach and onboarding where each video reaches a specific person whose name is in the script. Not the right tool for hero brand video where the audience is being asked to feel something about the company. Use human production for that.

Synthesia makes AI talking-head videos for enterprise content: training, product walkthroughs, software demos, and onboarding sequences.

Pick from 140+ stock avatars or pay to create a custom one based on a real person. Write a script. Synthesia generates a finished video in about five minutes, with the avatar lipsyncing to your text. Output works in 30+ languages with native-sounding voices, which makes it useful for global L and D teams localizing training content without re-recording per market.

The product lives on the internal and educational side rather than brand or marketing. Think training a global sales team on a new product, refreshing onboarding videos when policies change, or building software walkthroughs that have to be updated every quarter. Re-shooting human video for any of that would be prohibitive.

Common workflows by role:

• L and D teams produce training content at scale across markets
• Product marketers build feature walkthroughs that get updated alongside releases
• HR teams ship onboarding sequences in each employee's local language
• Customer education teams build help-center video without a video crew

For enterprise buyers, compliance is the differentiator. The platform ships with:

• SOC 2 Type II
• GDPR
• ISO 27001
• SAML SSO
• Audit logs
• Role-based permissions

Those features remove the usual friction when legal and security teams evaluate AI video. The data handling and access controls are the kind enterprise IT signs off on.

The editor is built for people who don't edit video. You write the script, pick the avatar, choose a background template, and ship. There's no timeline, no clips, no transitions to fight with. Updating a video means editing the script and re-rendering, which maps well to enterprise content that gets revised often.

A few specifics worth knowing:

• Custom avatars are based on a real person who recorded a short training session
• Stock avatars cover a range of ages, ethnicities, and styles
• Languages include native voice quality, not just translation overlays
• Branded templates ensure consistency across a team's outputs

Synthesia is built for content distributed to many viewers, not videos that name one person per render. For personalized one-to-one outreach where each video addresses a specific named recipient, HeyGen is the more focused alternative.

Paid subscription with tiers scaling by minutes of video generated per month and number of seats. Enterprise pricing is available for teams producing at high volume.

Best for internal training, product walkthroughs, and explainer content at scale where compliance and approval flows matter. Not ideal for personalized one-to-one outreach. HeyGen is more focused there.