Cybersecurity · head to head
DataGrail vs Proton Mail
DataGrail
Cybersecurity
Privacy platform that finds shadow data systems and automates data subject requests across them
- 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: DataGrail no pricing is published, and while benchmarking suggests it undercuts OneTrust for comparable scope, cost still scales with request volume and connected systems, which grow with the business.; 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 DataGrail and Proton Mail actually diverge.
| Attribute | DataGrail | Proton Mail |
|---|---|---|
| Starting price | On request | Free |
| Pricing model | quote | freemium |
| Free tier | No | Yes |
| Platforms | Web, API | 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 DataGrail
- Live data discovery
- Request automation
- Audit trail
- Consent management
- Integration catalogue
- Risk monitoring
- Consumer request portal
- Reporting
Only in Proton Mail
Nothing recorded that DataGrail does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
DataGrail
- A consumer brand whose deletion requests keep missing data in marketing tools the privacy team did not know existednot Proton Mail
- A company processing hundreds of CCPA requests a month where manual fulfilment has become a full-time jobnot Proton Mail
- A privacy team leaving OneTrust because the platform tracked requests but staff still completed them by handnot Proton Mail
- An organisation needing evidence for a regulator that deletion actually occurred in every system, not that a ticket was closednot Proton Mail
Proton Mail
- Encrypted email communicationnot DataGrail
- Privacy-focused email servicenot DataGrail
- Family email protectionnot DataGrail
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
DataGrail
- No pricing is published, and while benchmarking suggests it undercuts OneTrust for comparable scope, cost still scales with request volume and connected systems, which grow with the business.
- Automated fulfilment only works for systems with a supported connector, so homegrown applications and legacy databases still need manual handling, and those are usually where the awkward data lives.
- Discovery works by observing integrations and traffic patterns, so genuinely isolated systems, offline data and files on employee machines remain invisible and outside the data map.
- It is narrower than the enterprise privacy suites, lacking the assessment, third-party risk and wider GRC modules a large regulated organisation will also need, so it may be one of two platforms rather than the only one.
- Deletion automation is irreversible and mistakes are unrecoverable, so teams need real confidence in identity verification before enabling it, and that caution often keeps deletion semi-manual for months after purchase.
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
DataGrail
On request- DataGrail Platform$undefined/year
- Data discovery and mapping
- Data subject request automation
- Consent management
Proton Mail
FreeNo published plan breakdown. See the Proton Mail review.
Which should you pick?
Choose DataGrail if
- You need live data discovery.
- You work on Web, API.
- You also want request automation.
Questions people ask
- Is DataGrail or Proton Mail better?
- Neither clearly leads. DataGrail 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, DataGrail or Proton Mail?
- Proton Mail has a free tier; the other does not. Paid plans start at On request for DataGrail and Free for Proton Mail.
- Does DataGrail or Proton Mail run on more platforms?
- DataGrail runs on Web, API. 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. DataGrail starts at On request.
- What is DataGrail best used for?
- DataGrail is most often used for a consumer brand whose deletion requests keep missing data in marketing tools the privacy team did not know existed, a company processing hundreds of ccpa requests a month where manual fulfilment has become a full-time job, a privacy team leaving onetrust because the platform tracked requests but staff still completed them by hand, an organisation needing evidence for a regulator that deletion actually occurred in every system, not that a ticket was closed. Of those, a consumer brand whose deletion requests keep missing data in marketing tools the privacy team did not know existed and a company processing hundreds of ccpa requests a month where manual fulfilment has become a full-time job are not what Proton Mail is typically brought in for.
- What can DataGrail do that Proton Mail cannot?
- DataGrail covers Live data discovery, Request automation, Audit trail, Consent management.
Answered from the vendors’ own pages
DataGrail: How is DataGrail different from OneTrust?
OneTrust orchestrates the workflow; DataGrail focuses on connecting to systems and completing the request, and benchmark data suggests it prices materially below OneTrust for comparable scope.
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.
SourceDataGrail: Does it find systems we do not know about?
Yes. Continuous discovery of unsanctioned tools processing personal data is its main technical claim.
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.
SourceDataGrail: What does it cost?
Not published. Pricing is quoted by request volume and connected systems, with multi-year commitments typically discounted.
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.
SourceDataGrail: Does it cover consent as well as requests?
Yes, it includes consent management, though publishers needing certified advertising consent usually use a specialist CMP.
Proton 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 Proton Mail
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