Cybersecurity · head to head
One Identity vs Proton Mail
One Identity
Cybersecurity
Quest-owned identity governance, PAM and Active Directory management
- From
- On request
- Rated
- -
The short version
- Only Proton Mail has a free tier, so it costs nothing to try first.
- Each has a real cost: 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.; Proton Mail paid plan pricing not displayed on vendor site
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which One Identity and Proton Mail actually diverge.
| Attribute | One Identity | Proton Mail |
|---|---|---|
| Starting price | On request | Free |
| Pricing model | quote | freemium |
| Free tier | No | Yes |
| Platforms | Web, Windows, Linux | Web |
Identical on both: 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 One Identity
- Identity Manager
- Safeguard
- Active Roles
- OneLogin
- Password Manager
- syslog-ng
- Starling connectors
Only in Proton Mail
Nothing recorded that One Identity does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
One Identity
- An organisation whose authoritative directory will remain on premises Active Directory and needs delegated administration with attribute-level controlnot Proton Mail
- A government or defence environment requiring privileged session management on a hardened physical appliance rather than a cloud servicenot Proton Mail
- A manufacturer with SAP and Active Directory needing provisioning governed under one certification processnot Proton Mail
- An enterprise consolidating Active Directory after an acquisition and needing automated account lifecycle across both forestsnot Proton Mail
Proton Mail
- Encrypted email communicationnot One Identity
- Privacy-focused email servicenot One Identity
- Family email protectionnot One Identity
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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.
Proton Mail
- Paid plan pricing not displayed on vendor site
- Free tier limited to 1 GB storage
- Free tier limited to single email address
Pricing, plan by plan
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
Proton Mail
FreeNo published plan breakdown. See the Proton Mail review.
Which should you pick?
Choose One Identity if
- You need identity manager.
- You work on Web, Windows, Linux.
- You also want safeguard.
Questions people ask
- Is One Identity or Proton Mail better?
- Neither clearly leads. One Identity starts at On request and Proton Mail at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, One Identity or Proton Mail?
- Proton Mail has a free tier; the other does not. Paid plans start at On request for One Identity and Free for Proton Mail.
- Does One Identity or Proton Mail run on more platforms?
- One Identity runs on Web, Windows, Linux. Proton Mail runs on Web.
- Can I use Proton Mail for free?
- Yes. Proton Mail has a free tier, so you can try it without paying. One Identity starts at On request.
- What is One Identity best used for?
- One Identity is most often used for an organisation whose authoritative directory will remain on premises active directory and needs delegated administration with attribute-level control, a government or defence environment requiring privileged session management on a hardened physical appliance rather than a cloud service, a manufacturer with sap and active directory needing provisioning governed under one certification process, an enterprise consolidating active directory after an acquisition and needing automated account lifecycle across both forests. Of those, an organisation whose authoritative directory will remain on premises active directory and needs delegated administration with attribute-level control and a government or defence environment requiring privileged session management on a hardened physical appliance rather than a cloud service are not what Proton Mail is typically brought in for.
- What can One Identity do that Proton Mail cannot?
- One Identity covers Identity Manager, Safeguard, Active Roles, OneLogin.
Answered from the vendors’ own pages
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.
Proton Mail: Is there a free version of Proton Mail?
Yes, Proton Mail offers a free plan with 1 GB storage, 1 encrypted email address, and basic features like folders, labels, and filters.
SourceOne Identity: Does it include privileged access?
Safeguard provides it, but it is licensed separately from Identity Manager. Neither includes the other.
Proton Mail: What does the Mail Plus plan include?
Mail Plus includes 15 GB storage, 10 encrypted email addresses, support for 1 custom domain, 10 hide-my-email aliases, priority support, and access to Proton Calendar.
SourceOne 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.
Proton Mail: What is included in Proton Unlimited?
Proton Unlimited provides 500 GB storage, 15 email addresses, 3 custom domains, unlimited hide-my-email aliases, access to Mail, Calendar, VPN, Drive, and Pass, plus dedicated support.
SourceProton Mail: Does Proton Mail offer a money-back guarantee?
Yes, Proton Mail provides a 30-day money-back guarantee for paid plans.
SourceRelated pages
More on One Identity
More on Proton Mail
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