How to A/B test different pages?

Question

Software testing

Hello everyone,
The question of a / b testing is acute. I have no experience in this, after an hour of searching on Google I did not find an intelligible answer. I decided to turn to the community in the hope of the help of experts. As I understand it, most services offer changing some elements such as buttons and a title and freezing them - this option does not suit me.
I need to measure 2 different pages. There is a current page of the payment site and a completely different one in structure after the redesign. In this case, how can you distribute traffic 50/50 and measure conversions?
Wish the service was free :)

Answer 1

What "service" are you talking about?
1) You have two payment pages
2) When a user visits the site for the first time, create a cookie for him and put him on the first or second page with a probability of 0.5.
3) Write down the necessary actions in the database, keep statistics for two pages
4) Compare the indicators
5) Draw conclusions
If you are too lazy to mess with several pages at the same time, then test separately. 7 days one page and 7 days the second.

Answer 2

There is an Optimizely service, from paid alternatives - Visual Website Optimizer and Kameleoon