app · HeyGen (Hong Kong / US)

HeyGen

HeyGen is the tool most people mean when they say "AI avatar video." Upload a photo (or use a stock avatar), type or paste a script, pick a voice, and it renders a lip-synced talking-head video in minutes — no camera, no studio. Its "Avatar IV" model produces natural mouth movement and expression from a single still photo. Beyond pre-recorded clips, HeyGen also ships an Interactive Avatar / Streaming Avatar API: you can wire an avatar to an LLM and have it hold a live, low-latency video conversation — useful for kiosks, virtual presenters, or a "talking chatbot" front end. The free tier is enough to try it; anything resembling regular use (a course, a product demo library, a support bot) needs a paid plan. Good starting point for students because the pre-recorded workflow requires zero technical setup — it is the closest thing to "PowerPoint with a face."

• paid
• cloud
• Commercial