We did a comparison between different solutions, and we used a methodology from Gartner to make the decision. The decision was to go with Citrix SD-WAN because it had the best score on most of our non-negotiable items. We had listed some objectives, and we scored all different solutions against our objectives. One of the parameters was cost, but it was not the only parameter. Citrix SD-WAN came out as the best solution for us.

We looked at the Cisco product at the time. (Briefly). But we found the Citrix product to be better because it uses a packet by packet switching, where as the Cisco apparently switched session by session to the best line. This was some time back, and I have not looked at the Cisco product since.

Before choosing the solution I evaluated Juniper Networks and Cisco Meraki.

We also looked at Cisco Load Balancer and Radware. We did the PoC and we found the scale was good, so that's why we bought NetScaler.

Citrix is a good product so I have not looked at other options.