Three tools, one lazy word — monitoring. Buying the wrong one is easy when the questions they answer get blurred together. Here they are, separated.
An office rarely needs more monitoring. It needs an answer to one specific question it cannot currently answer. DEX answers are our people suffering on their computers. OpManager, ManageEngine's network and server monitor, answers is our infrastructure up and healthy. Inventory — the asset register inside Endpoint Central or a tool like PDQ Inventory — answers what do we own and what is installed on it. Confuse the questions and you buy a dashboard that cannot help you.
👆 Each tool sees a different layer — none substitutes for another
Choose DEX when the pain sounds like this: "the PCs are slow and we cannot prove where", "users complain but tickets tell us nothing", "we replace computers by age and hope". DEX's evidence is per-device experience — scores, boot and logon trends, crash patterns — and its output is a repair and refresh priority list. It is the only one of the three that can tell you which specific computer is ruining someone's day.
Choose OpManager when the pain sounds like this: "the server went down at night and we found out from users at 9 AM", "we do not know which switch port is erroring", "the internet line saturates and nobody knows with what". It polls servers, network devices, links and services and alerts on availability and performance. It will not tell you that one accountant's PC takes four minutes to log on — that is not its layer, and expecting it is how good tools get blamed unfairly.
Choose inventory when the pain sounds like this: "how many PCs do we actually have", "which machines still run the old software version", "the auditor wants a licence count by Friday". Inventory is a register: hardware details, installed software, versions, warranties. It knows what exists, not how it feels or whether it is up right now. It is also the foundation the other two quietly depend on — you cannot score or monitor devices you have not first discovered.
In a mature setup the three feed each other. Inventory keeps the device list true. OpManager keeps the shared infrastructure honest — and when DEX shows a whole branch's logon times spiking, OpManager's view of that branch's server and link often holds the cause. DEX keeps the endpoint experience visible and converts the other tools' blind spot into repair lists. Notice the direction of the example: DEX found the symptom, infrastructure monitoring explained it. Neither alone told the whole story.
Watch the DEX review first, then list your own top three IT questions and match each to the tool that actually answers it.
▶️ Watch Full VideoNot in the DEX sense. OpManager monitors servers, network devices and services for availability and performance. Per-user endpoint experience — boot time, logon time, app crashes on each PC — is DEX's job, delivered through endpoint agents.
Yes, in practice. DEX scores devices it knows about; inventory is the discipline that keeps the device list complete and current, including details DEX does not focus on like warranties and installed-software registers. In Endpoint Central both live on the same agent foundation.
Start with the question that hurts. Most small offices get the fastest relief from inventory plus endpoint management as the foundation, adding DEX when slow-PC complaints need proof and priorities, and network monitoring when infrastructure surprises begin.