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Cybersecurity · head to head

MetricStream vs Proton Mail

MetricStream logo

MetricStream

Cybersecurity

Enterprise GRC suite for large regulated organisations, with implementation costs that exceed the licence

From
On request
Rated
-
Full reviewWebsite
Proton Mail logo

Proton Mail

Cybersecurity

Secure email that protects your privacy

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Proton Mail has a free tier, so it costs nothing to try first.
  • Each has a real cost: MetricStream implementation typically costs one and a half to two and a half times the first year licence, so a one million dollar licence carries a one and a half to two and a half million dollar rollout that rarely appears in the initial business case.; Proton Mail paid plan pricing not displayed on vendor site
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which MetricStream and Proton Mail actually diverge.

Attributes where MetricStream and Proton Mail differ
AttributeMetricStreamProton Mail
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes

Identical on both: platforms (Web), 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 MetricStream

  • Enterprise and operational risk
  • Regulatory compliance
  • Internal audit
  • Third-party risk
  • Cyber risk quantification
  • Policy and case management
  • Content libraries
  • ESG reporting

Only in Proton Mail

Nothing recorded that MetricStream does not also cover.

What people use each for

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

MetricStream

  • A multinational bank mapping one control set against obligations from several regulators and needing to evidence the mapping to examinersnot Proton Mail
  • An insurer consolidating separate risk, audit and vendor systems that currently produce contradictory numbers to the boardnot Proton Mail
  • A pharmaceutical company that must track regulatory change across jurisdictions and show what each change affectednot Proton Mail
  • An organisation whose three lines of defence must share one risk taxonomy rather than three overlapping spreadsheetsnot Proton Mail

Proton Mail

  • Encrypted email communicationnot MetricStream
  • Privacy-focused email servicenot MetricStream
  • Family email protectionnot MetricStream

Where each one falls short

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

MetricStream

  • Implementation typically costs one and a half to two and a half times the first year licence, so a one million dollar licence carries a one and a half to two and a half million dollar rollout that rarely appears in the initial business case.
  • Full deployment takes six to eighteen months, during which the organisation runs old and new processes in parallel and the promised efficiency gain is negative.
  • Per-user pricing in the low thousands per year per seat discourages giving access to the first line of defence, which is precisely where risk data originates, so many deployments end up with data still arriving by spreadsheet.
  • Configuration flexibility comes at the price of specialist skills, and organisations become dependent on MetricStream partners or a small internal team, making later changes slow and expensive.
  • The interface and workflow feel enterprise-heavy next to modern compliance tools, and infrequent business users find it hard, which suppresses the participation the platform is meant to enable.

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

MetricStream

On request
  • MetricStream GRC$undefined/year
    • Enterprise risk, audit, compliance and third-party modules
    • Regulatory content libraries
    • Multi-entity and multi-jurisdiction support

Proton Mail

Free

No published plan breakdown. See the Proton Mail review.

Which should you pick?

Choose MetricStream if

  • You need enterprise and operational risk.
  • You also want regulatory compliance.
MetricStream review

Choose Proton Mail if

  • You want to start without paying.
Proton Mail review

Questions people ask

Is MetricStream or Proton Mail better?
Neither clearly leads. MetricStream 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, MetricStream or Proton Mail?
Proton Mail has a free tier; the other does not. Paid plans start at On request for MetricStream and Free for Proton Mail.
Does MetricStream or Proton Mail run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Proton Mail for free?
Yes. Proton Mail has a free tier, so you can try it without paying. MetricStream starts at On request.
What is MetricStream best used for?
MetricStream is most often used for a multinational bank mapping one control set against obligations from several regulators and needing to evidence the mapping to examiners, an insurer consolidating separate risk, audit and vendor systems that currently produce contradictory numbers to the board, a pharmaceutical company that must track regulatory change across jurisdictions and show what each change affected, an organisation whose three lines of defence must share one risk taxonomy rather than three overlapping spreadsheets. Of those, a multinational bank mapping one control set against obligations from several regulators and needing to evidence the mapping to examiners and an insurer consolidating separate risk, audit and vendor systems that currently produce contradictory numbers to the board are not what Proton Mail is typically brought in for.
What can MetricStream do that Proton Mail cannot?
MetricStream covers Enterprise and operational risk, Regulatory compliance, Internal audit, Third-party risk.

Answered from the vendors’ own pages

MetricStream: What does MetricStream cost?

It is quoted. Market data suggests roughly 75,000 to 150,000 US dollars a year for small enterprise deployments, 250,000 to 500,000 for medium and 750,000 upwards for large.

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.

Source
MetricStream: How long is implementation?

Six to eighteen months for a full platform deployment, and the services cost usually exceeds the first year licence.

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.

Source
MetricStream: Is it right for a mid-market company?

Usually not. Its depth suits organisations with several regulators and formal three lines of defence structures.

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.

Source
MetricStream: Does it replace SOC 2 automation tools?

It can cover the framework, but it is not designed for the automated evidence collection those tools do cheaply.

Proton Mail: Does Proton Mail offer a money-back guarantee?

Yes, Proton Mail provides a 30-day money-back guarantee for paid plans.

Source
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