@NotWegant
I used it solution from @Nazarii
This solution is not for one site (it can be used for multiple sites without additional services)
Your funcaptcha solution works with additional captcha services, so your customer buys from you for $100-150 and then pays for each captcha solution as a separate service. This is the difference.
You can also sell for $15 or for free.
If the price doesn't fit you, just don't buy it and look for a cheaper option or a free solution. You have no obligation.