Yes, adam.ai is completely free to use up to 5 members, with 5GB meetplace storage.
Subscribing for the annual plan will provide you a 50% off discount.
adam.ai charges per member on either a monthly or annual basis.
The pro plan costs $10 per member per month when billed monthly and $4.99 per member per month when billed annually.
Please check the pricing page on adam.ai/pricing