HeyGen overlaps heavily with Synthesia on avatar-led video and pushes harder on translation and lip sync across languages.
Three one-minute clips is a demo budget, not a trial budget
The free plan permits three videos a month with a one-minute ceiling on each. That is enough to see whether the avatars and voices clear your quality bar, and not enough to produce anything you would ship. Whether that is a fair trade depends on what you are evaluating.
Why there is no entry price on this profile
HeyGen's pricing page redirects by locale. Asked for it twice, once with an explicit English preference, we were served the Vietnamese page both times, and the English path we tried returned a 404. That page does carry figures and it offers a monthly and a yearly cadence, and we could not establish which of the two the price we could see belongs to. So the entry price is off this profile rather than converted or guessed.
That is the same standing rule that applies to Pika and to Zapier: this site publishes the month to month figure or none. Read HeyGen's current number on their page.