Why are organizations replacing Cisco ISE?

Cost is a big reason to look. Per-endpoint licensing adds up quickly on a large network, especially if the renewal price has increased. Compare quotes using your actual endpoint count and the features you need rather than assuming a single price applies everywhere.

There's also the amount of work involved. ISE gives you a lot of flexibility, but someone has to build and maintain the policies. That can be a tough sell for a small team.

ClearPass is one alternative to evaluate if you want a different administration experience. Compare how each product handles your actual policies and integrations, not just how quickly a demo gets set up.

Juniper Mist Access Assurance is another option if cloud-managed network access control appeals to you. I'd put it on a shortlist alongside the other products and check whether it supports the devices and access policies you need.

Sometimes the reason is a network redesign rather than a direct product swap. If users are on internet-only networks and access to applications is controlled through a SASE platform, the role of 802.1X may change.

That doesn't automatically make network access control unnecessary. Check what still needs local network access, how devices are separated, and whether management interfaces are reachable before removing it.

Security concerns can be part of the decision too, especially if a team is unhappy with how vulnerabilities are addressed. I'd compare each vendor's security advisories and patch process rather than treating a general concern as proof that one product is safer.