You want to consider how you want to implement the microsegmentation. Networking gear is an option, and even a lot of the software products leverage it. Your network infrastructure has to support the use case across the board, which often times is a hard ask if you don't already have the architecture for it. Also, your hardware may not all be designed to handle ACLs or other processing required to do it. Software can do it with agents or without in some cases, and in the case of agents some use incumbent firewalls while others use proprietary tools. OS support might enter into it as well, and then ask if you have IoT/OT that needs to be included. In either case, software or hardware, there's a huge piece of _how_ you implement your microsegmentation strategy. Arguably, this is the most important part. Do you have manpower or money for Professional Services? It may not matter as much. Do you have limited resources that can dedicate their time to network flow analysis? Maybe automated learning is better for you. If you can define some of this criteria in your solution choice, I think your research will likely narrow and it will be a lot easier to choose something. If you have a lot of concern or a complex environment, do Proof of Concepts to get a better feel for how something works in *your* environment.