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Cybersecurity · head to head

Mimecast vs One Identity

Mimecast logo

Mimecast

Cybersecurity

Email and collaboration security

From
$4/month
Rated
-
Full reviewWebsite
One Identity logo

One Identity

Cybersecurity

Quest-owned identity governance, PAM and Active Directory management

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Mimecast no pricing is published for any product or plan, and every route ends at a quote or demo request; One Identity the portfolio is assembled from separate acquisitions, so components are separately licensed, separately administered and do not present one console, which raises operational cost.
  • They diverge on capability: Mimecast covers Advanced threat detection, One Identity covers Identity Manager.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Mimecast and One Identity actually diverge.

Attributes where Mimecast and One Identity differ
AttributeMimecastOne Identity
Starting price$4/monthOn request
Pricing modelsubscriptionquote
PlatformsEmail, Cloud, CollaborationWeb, Windows, Linux
Founded2003Unknown

Identical on both: free tier (No), user rating (Not yet rated), category (Cybersecurity).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Mimecast

  • Advanced threat detection
  • Secure sharing
  • Email encryption
  • Message tracking
  • Email archiving
  • Legal hold
  • eDiscovery
  • Backup and recovery

Only in One Identity

  • Identity Manager
  • Safeguard
  • Active Roles
  • OneLogin
  • Password Manager
  • syslog-ng
  • Starling connectors

What people use each for

The jobs each tool is most often brought in to do.

Mimecast

  • Email security filtering against phishing and targeted attacksnot One Identity
  • Email archiving, continuity and compliance for organisationsnot One Identity

One Identity

  • An organisation whose authoritative directory will remain on premises Active Directory and needs delegated administration with attribute-level controlnot Mimecast
  • A government or defence environment requiring privileged session management on a hardened physical appliance rather than a cloud servicenot Mimecast
  • A manufacturer with SAP and Active Directory needing provisioning governed under one certification processnot Mimecast
  • An enterprise consolidating Active Directory after an acquisition and needing automated account lifecycle across both forestsnot Mimecast

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Mimecast

  • No pricing is published for any product or plan, and every route ends at a quote or demo request
  • The platform is split into separately sold products for email security, awareness training, data protection and governance
  • Collaboration threat protection, DMARC analysis, incident response and email archiving are all further add ons on top of those

One Identity

  • The portfolio is assembled from separate acquisitions, so components are separately licensed, separately administered and do not present one console, which raises operational cost.
  • Identity Manager implementations are customisation-heavy and commonly run over a year, with the services spend exceeding the licence cost in the first year.
  • Quest has changed private equity ownership more than once since the Dell separation, and buyers should ask directly about product investment commitments before signing a multi-year deal.
  • Product documentation and support sit behind a customer portal, which makes independent evaluation before purchase harder than with vendors that publish openly.
  • The cloud-native and developer experience trails the pure-play identity vendors, so organisations moving decisively to SaaS applications find the on premises heritage becomes a constraint rather than an asset.

Pricing, plan by plan

Mimecast

$4/month
  • Defender$4/month
    • Per user
    • Threat protection
    • Impersonation prevention
  • Archive$3/month
    • Email archiving
    • Legal hold
    • Search & recall
  • Unified$6/month
    • All Defender features
    • All Archive features
    • Backup

One Identity

On request
  • Identity Manager$undefined/year
    • Priced per managed identity
    • On premises or hosted
    • Access certification and provisioning
  • Safeguard$undefined/year
    • Priced per privileged user or per appliance
    • Hardened appliance option for session management
    • Licensed separately from Identity Manager
  • Active Roles$undefined/year
    • Priced per managed Active Directory account
    • Delegated administration and automated provisioning
    • Licensed separately

Which should you pick?

Choose Mimecast if

  • You need advanced threat detection.
  • You work on Email, Cloud, Collaboration.
  • You also want secure sharing.
Mimecast review

Choose One Identity if

  • You need identity manager.
  • You work on Web, Windows, Linux.
  • You also want safeguard.
One Identity review

Questions people ask

Is Mimecast or One Identity better?
Neither clearly leads. Mimecast starts at $4/month and One Identity at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Mimecast or One Identity?
Mimecast starts at $4/month and One Identity at On request.
Does Mimecast or One Identity run on more platforms?
Mimecast runs on Email, Cloud, Collaboration. One Identity runs on Web, Windows, Linux.
What is Mimecast best used for?
Mimecast is most often used for email security filtering against phishing and targeted attacks, email archiving, continuity and compliance for organisations. Of those, email security filtering against phishing and targeted attacks and email archiving, continuity and compliance for organisations are not what One Identity is typically brought in for.
What can Mimecast do that One Identity cannot?
Mimecast covers Advanced threat detection, Secure sharing, Email encryption, Message tracking. One Identity covers Identity Manager, Safeguard, Active Roles, OneLogin.

Answered from the vendors’ own pages

Mimecast: How much does Mimecast cost?

Mimecast does not publish pricing on its website. Customers must request a custom quote by contacting the sales team at +1 617 393 7000 or using the Get a Quote button.

Source
One Identity: Is One Identity the same company as Quest?

Yes. One Identity is Quest Software's identity and access management business unit, not a separate vendor.

Mimecast: Is there a free trial of Mimecast?

Mimecast's trial and pricing options are not specified on the public website. Contact sales at +1 617 393 7000 or through their support portal at mimecastsupport.zendesk.com for trial availability.

Source
One Identity: Does it include privileged access?

Safeguard provides it, but it is licensed separately from Identity Manager. Neither includes the other.

One Identity: Why choose this over SailPoint or Saviynt?

Almost always because of Active Directory depth via Active Roles or an appliance requirement for privileged sessions. For cloud-first estates the specialists are the stronger choice.

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