What each tool actually does — and where the pricing pages get sneaky
**HeyGen** sells three different things under one roof: standard avatar video (you write a script, an avatar reads it), Avatar IV (an upgraded, more lifelike rendering engine billed per credit at $0.30/credit per https://www.heygen.com/pricing), and Interactive Avatar starting at $99/mo, which is the conversational live-avatar product. That breadth is why the Creator plan looks cheap at $24/mo for 15 minutes but the real costs depend on which engine you actually use. If you only see the Creator tier, you have not seen the real HeyGen.
**Synthesia** is the corporate-training default. Plans on https://www.synthesia.io/pricing are pegged to monthly minute caps: Starter $18/mo for 10 min, Creator $64/mo for 30 min, plus Enterprise. The catch is that overage is hard — you do not pay extra per minute, you simply cannot publish more. That is great for budgeting and miserable for spiky campaigns. Synthesia avatars look conservative-corporate, which is exactly what L&D buyers want.
**D-ID** is unusual: a real API-first product priced at $0.30/min (https://www.d-id.com/pricing) on top of consumer plans starting at Lite $5.10/mo. Developers picking D-ID are usually embedding a talking head into a SaaS product, a kiosk, or a chatbot. The studio is fine; the API is the reason to buy.
**Colossyan** and **Hour One** both sit between Synthesia and HeyGen on positioning. Colossyan emphasizes scenario-based training with branching dialogue, priced at Starter $35/mo for 30 min and Pro $90/mo for 50 min and 3 users. Hour One leans into business video — sales enablement, product walk-throughs — at Lite $25/mo (10 min) and Business $108/mo (60 min). Neither tries to be a developer platform.
**Tavus** is in a separate category: Personalized Video and Conversational Video Interface. The published plan at https://www.tavus.io/pricing is $59/mo for 20 minutes of Personalized Video, plus a custom API tier. If you do not have a use case for 1:1 outbound at scale, Tavus is the wrong tool. If you do, nothing else is close.
**Vidnoz** and **Akool** are the value tier. Vidnoz starts at $19.99/mo and tops out at $99/mo Enterprise per https://www.vidnoz.com/pricing.html; Akool runs a credit system starting at Pro $30/mo for 200 credits and climbing to Pro Max $300/mo for 3500 credits (https://akool.com/pricing). They are good entry points if your only constraint is budget.