Outpost Firewall is a free product. The more advanced Outpost Firewall PRO is "Shareware". This means that we have made the software available to you for free evaluation. You are entitled to evaluate the software for up to 30 days without obligation to pay. After 30 days, if you decide to keep the software, you must register your copy with us for a small fee.
If you are not sure which version you need, Outpost Firewall or Outpost Firewall PRO, please visit http://www.agnitum.com/products/outpost/profree.html to help you decide.
For pricing information please visit http://www.agnitum.com/purchase/.