Do Atlassian products have to be purchased?

Do all Atlassian products have to be purchased? Or are some free?

Most of them have to be purchased. Here is our info about the cost: https://info.seibert-media.net/display/Atlassian/Atlassian+licenses+-+prices+and+costs

Some are free, like some add-ons or HipChat for example: https://www.hipchat.com/