AI Tools for Marketing

HeyGen vs Synthesia

Two video tools, two different best-cases. Here is the short read on which one fits your situation.

The short answer

Pick HeyGen if:

Sales and customer-success teams sending personalized video at scale.

Pick Synthesia if:

Internal training videos and product walkthroughs at scale.

HeyGen logo

HeyGen

AI avatars and voice cloning for personalized video at scale.

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

Record a short training video once. HeyGen builds an avatar that lipsyncs to scripts and looks convincingly like you. From there, generate hundreds of personalized videos at scale, swapping in different names, companies, or details from a spreadsheet or CRM.

Sales teams use it for one-to-one outreach: welcome videos for new prospects, follow-ups after demo calls, conference invitations that mention the recipient's company by name. Marketing teams use it for personalized customer-success videos or localized campaign content.

The avatar can speak in 30+ languages with reasonable lipsync, so the same recording works in markets where you do not speak the local language. There is also an API for plugging into your CRM to trigger video generation off lead events.

Freemium model with paid subscription tiers scaling by minutes of video generated and team seats. An API is available for production integrations.

Best for personalized outreach at scale where each video reaches a specific person. Not the right tool for hero brand video where the audience is asked to feel something about the company.

What it does well

  • Avatar voice cloning works on a short sample
  • API enables personalized video at scale
  • Lipsyncing across 30+ languages for localization

What it does not

  • Best features are gated to higher plans

Pricing

Free + paid plans

Synthesia logo

Synthesia

AI video platform built for enterprise training and explainer content.

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 5 minutes, with the avatar lipsyncing to your text. Output works in 30+ languages with native-sounding voices, which makes it useful for global L&D teams localizing training content.

Compliance is the differentiator for enterprise buyers. SOC 2 Type II, GDPR, ISO 27001, SAML SSO, audit logs, and role-based permissions all come standard. For legal and security teams evaluating the tool, these features remove the usual friction around adopting AI video.

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 videos, product walkthroughs, and explainer content at scale. For personalized one-to-one outreach where each video addresses a specific person, HeyGen is the more focused alternative.

What it does well

  • Enterprise compliance certifications (SOC 2, GDPR, ISO 27001)
  • 120+ languages with native-sounding voices
  • Custom avatars available

What it does not

  • Pricing scales quickly with usage

Pricing

Paid (subscription)

When to skip both

Skip HeyGen if: Brand content where the video itself is the product. Use human production.

Skip Synthesia if: Personalized one-to-one outreach. HeyGen is more focused there.