Mimecast Incydr vs Microsoft Purview: which catches insider risk?
Microsoft Purview gives Microsoft 365 estates insider risk management and data loss prevention inside the licences many already own. Mimecast Incydr takes a different approach: see how data actually moves first, then decide what is risky. Both are credible. This guide compares them on the things that decide the outcome, says when Purview alone is the right answer, and explains why we usually recommend Incydr where insider risk is a live concern. C4C is an accredited Mimecast partner, disclosed up front.
Insider risk is the problem most organisations have strong perimeter security and no real answer to. The question is rarely whether people move sensitive data, they do, every day, for good reasons and occasionally for bad ones. The question is whether you can see it, tell the leaver from the careless from the malicious, and respond in proportion. Our guide on insider risk management covers the problem. This guide is about the two products most UK enterprises shortlist to solve it.
They start from opposite ends. Purview starts from policy: define what sensitive data is and what may not happen to it, then enforce. Incydr starts from visibility: record what moved, where and by whom, then score the risk and act on the exceptions. That difference explains almost everything else in the comparison.
What each one actually is
Microsoft Purview is Microsoft’s compliance and data governance suite. For insider risk it offers two things: Purview Data Loss Prevention, which applies policies to data in Microsoft 365 and on endpoints onboarded through Defender for Endpoint, and Purview Insider Risk Management, which uses signals from the Microsoft estate and policy templates such as departing employee data theft to raise alerts. It is included in Microsoft 365 E5 and the E5 Compliance add on. It is strongest where the estate is Microsoft and the sensitive data is already classified.
Mimecast Incydr is an insider risk management platform built for visibility first. A lightweight agent records file activity across Windows and Mac endpoints, browsers, email, removable media and cloud services including Microsoft 365, Google Drive, Box and personal cloud accounts. It scores each event by what the file is, where it went and who moved it against a baseline of normal activity for the role, prioritises the exceptions, and automates the response, from alerting security or HR to containing the action. Our Mimecast Incydr page covers what it does in more detail.
Head to head
The rows below are where the two actually differ in practice. Where Purview holds its own we say so.
| What matters | Microsoft Purview | Mimecast Incydr |
|---|---|---|
| Approach | Policy first. Define sensitive data and the rules, then enforce. Only as good as the policies written. | Visibility first. Record everything that moved, score it, act on the exceptions. Useful from day one without a rulebook. |
| Coverage of the estate | Microsoft 365 and endpoints onboarded through Defender for Endpoint. Non Microsoft cloud services need connectors and are patchier. | Endpoints, browsers, email, removable media and cloud including Microsoft 365, Google Drive, Box and personal accounts. Built for the mixed estate. |
| Windows and Mac | Both, with Mac depending on Defender for Endpoint onboarding and lagging on some capabilities. | Both, natively. |
| Time to value | Weeks to months. Data classification and policy design come first, and they are the hard part. | Days. Baseline normal activity, then the risk score does the prioritising. |
| Signal quality | Alerts fire on rule matches. Noisy until the policies are refined, quiet on anything the policies did not anticipate. | Prioritised by risk score across file, vector and user. Fewer alerts, more genuine cases, and it catches what nobody wrote a rule for. |
| Leavers and departing employees | A policy template for departing employee data theft, driven from HR connector data. | Built in. Elevated scoring for leavers and a workflow for the exit period. |
| Response | Block, quarantine or warn through DLP policy actions. | Contain or block in the moment, automated triage, and a case handed to security or HR with the evidence attached. |
| Investigation and evidence | Activity explorer and alert detail within the Microsoft estate. | Full file activity history across every vector, exportable as an auditable record a regulator will accept. |
| Licensing | Included in E5 or the E5 Compliance add on. If you own E5, the incremental cost is zero. | Per user subscription on quote. |
| Who runs it | Needs Microsoft compliance skills and a policy owner. | Security and HR workflow. C4C implements and supports it as an accredited partner. |
When Purview alone is the right answer
If your estate is Microsoft end to end, you own E5 or E5 Compliance, your sensitive data is already classified with sensitivity labels, and you have a compliance team able to write and refine policies and live with the tuning period, Purview can be enough. Its integration with Microsoft 365 is native, the licence is already paid for, and for a well governed Microsoft only environment the incremental case for a second platform is weaker. We say so when that is the situation.
What Purview will struggle with even then is the data that leaves through the routes its policies did not anticipate, and the non Microsoft cloud services and Macs that sit outside its strongest coverage. If those are a small part of your world, it does not matter much. If they are not, it does.
Ask whether you could answer, today, how sensitive data actually left the organisation last month, by which routes, and who moved it. If Purview and its policies can answer that for your whole estate, including Macs and non Microsoft cloud, you may be covered. If the honest answer is that you would find out from a policy you happened to have written, that is the gap Incydr closes.
When Incydr earns its place, and why we usually recommend it
For most organisations we work with, insider risk is a visibility problem before it is a policy problem, and that is why Incydr is the product we recommend more often than not. You cannot write a rule for a risk you have not seen yet, and the routes data actually leaves by, a personal Google Drive, a USB stick, a browser upload from a Mac, are the ones policy first tools are weakest on. Incydr records all of it from day one, scores it, and surfaces the exceptions, which turns the question from writing rules to reviewing cases.
It is also the right answer for the mixed estate, which is most estates. Google Drive, Box, personal cloud accounts and Macs are covered natively rather than as afterthoughts. Leavers, who are the single most predictable insider risk, get elevated scoring and a workflow rather than a template. And the evidence trail is built for the conversation with HR, legal or a regulator, not only for the security console.
The proof is a real engagement. For a leading UK financial services organisation with strong perimeter security and no insight into how its own people moved data, C4C deployed Incydr with custom risk scoring and automated triage. Within ninety days the organisation had full visibility of data movement across endpoints and cloud and an 80 percent reduction in unmonitored file transfers, with auditable records for its regulator. The Incydr case study has the detail.
Where C4C stands
C4C Group is an accredited UK Mimecast partner and reseller. We supply, implement and support Incydr, and we tell clients when Purview alone is the right answer, which happens in well governed Microsoft only estates and which is why the recommendation carries weight when we make it. Our independence is in the recommendation, our partnership is in the delivery and support. The free human risk assessment is an honest first read on where your insider risk exposure sits.
Not sure whether Purview covers your insider risk?
Tell us your Microsoft licensing, whether the estate includes Macs or non Microsoft cloud, and what is prompting the question. We will tell you honestly whether Purview properly run is enough, or whether Incydr earns its place, and give you a like for like quote if it does. We will tell you if it does not.
Prefer email? Reach us directly at hello@c4cgroup.co.uk.
Frequently asked questions
Is Mimecast Incydr better than Microsoft Purview?
They solve the problem from opposite ends. Purview is policy first and strongest in a well governed, Microsoft only estate where sensitive data is already classified. Incydr is visibility first: it records how data actually moves across endpoints, browsers, removable media and cloud, scores the risk and surfaces the exceptions without a rulebook. For mixed estates and for organisations that do not yet know how their data leaves, Incydr is usually the stronger answer.
Do I need Incydr if I have Microsoft 365 E5?
Not automatically. E5 includes Purview Insider Risk Management and DLP, and if your estate is Microsoft end to end, your data is classified and a compliance team owns the policies, Purview may be enough. Incydr earns its place where Macs, Google Drive, Box or personal cloud are in the estate, where nobody can write the policies, or where you need visibility now rather than after a classification project.
Does Incydr work with Microsoft 365?
Yes. Incydr monitors file movement to and from Microsoft 365 alongside Google Drive, Box and personal cloud accounts, and the agent runs on Windows and Mac endpoints. It sits alongside Purview rather than requiring you to remove it, and many organisations keep Purview’s classification while using Incydr for detection and response.
How long does it take to get value from Incydr versus Purview?
Incydr baselines normal file activity in days and the risk scoring prioritises from there, so the first genuine cases surface quickly. Purview depends on data classification and policy design before it is useful, which typically takes weeks to months and needs skilled owners. In the Incydr engagement on this site, measurable results came within ninety days.
Which is cheaper, Incydr or Purview?
If you already own Microsoft 365 E5 or the E5 Compliance add on, Purview costs nothing extra and Incydr is a new per user subscription. If you would be buying the add on, the comparison is closer. Incydr is priced on quote, so the honest answer needs your user count. C4C gives like for like quotes and says what is negotiable.
Is C4C independent if it partners with Mimecast?
C4C is an accredited Mimecast partner and reseller, disclosed on every page that recommends it. The test is whether we will point you away from it, and we do: for a well governed Microsoft only estate with a compliance team, we say Purview can be enough. Incydr is a frequent recommendation because it fits the mixed estate and the visibility problem well, not because it is the answer to every question.