HeyGen vs Substack
Side-by-side comparison of HeyGen and Substack.
Create AI avatar videos without a camera
Newsletter publishing and monetization in one place
What they are
HeyGen
HeyGen generates studio-quality videos using AI avatars and text-to-speech voices, so creators and marketers can produce talking-head content without filming themselves. It supports over 175 languages and lets you clone your own voice and likeness. Teams use it for product explainers, onboarding videos, and localized content at scale. The avatar quality is impressive for scripted material, but unscripted or conversational styles still feel noticeably synthetic.
Substack
Substack is a publishing platform where writers host email newsletters and charge subscribers a recurring fee. Independent journalists, essayists, and niche experts use it to build direct audiences without relying on ad revenue. The platform handles payments, delivery, and a basic website automatically. Substack takes a 10% cut of paid subscription revenue on top of stripe fees, which becomes a real cost as an audience grows.
if you need ai video. It has a usable free tier to start with.
- +Realistic AI avatars reduce need for on-camera recording
- +Voice cloning reproduces your tone and accent with reasonable accuracy
- +Supports 175-plus languages for localized video without re-recording
if you need hosting and monetization. It has a usable free tier to start with.
- +Free to start with no upfront cost
- +Built-in payment processing removes the need for a separate tool
- +Readers can comment and respond, creating light community features
Which to choose
HeyGen and Substack solve different problems, so most people would not choose between them directly. The comparison below helps if you are weighing where to spend budget, or deciding whether you need both.
Read the full reviews for HeyGen and Substack.
Pricing checked 7 Jun 2026.