Cybersecurity · head to head
Proton Mail vs Resolver
Resolver
Cybersecurity
Risk, incident and investigations platform for corporate security and operational risk teams, owned by Kroll
- 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: Proton Mail paid plan pricing not displayed on vendor site; Resolver kroll ownership since 2022 means the product is sold alongside risk consulting services, so buyers who want software with no services attach should expect that conversation and should price the licence separately in negotiation.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Proton Mail and Resolver actually diverge.
| Attribute | Proton Mail | Resolver |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | freemium | quote |
| Free tier | Yes | No |
| Platforms | Web | Web, iOS, Android |
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 Proton Mail
Nothing recorded that Resolver does not also cover.
Only in Resolver
- Incident management
- Investigations
- Enterprise risk management
- Internal audit
- Compliance and obligations
- Business continuity
- Risk Event Management
- Configurable dashboards
What people use each for
The jobs each tool is most often brought in to do.
Proton Mail
- Encrypted email communicationnot Resolver
- Privacy-focused email servicenot Resolver
- Family email protectionnot Resolver
Resolver
- A national retailer consolidating store incident reporting, loss prevention cases and investigations into one system with defensible evidence handlingnot Proton Mail
- A bank that needs operational risk events captured against a risk and control register rather than in spreadsheets and emailnot Proton Mail
- A university security operations centre running dispatch, case management and clery-style reporting from a single recordnot Proton Mail
- An organisation that already retains Kroll for investigations and wants case intake and vendor handoff in the same platformnot Proton Mail
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Proton Mail
- Paid plan pricing not displayed on vendor site
- Free tier limited to 1 GB storage
- Free tier limited to single email address
Resolver
- Kroll ownership since 2022 means the product is sold alongside risk consulting services, so buyers who want software with no services attach should expect that conversation and should price the licence separately in negotiation.
- Configuration flexibility comes at the cost of implementation time, with deployments commonly running several months and typically requiring vendor or partner services, so the first-year cost is well above the annual licence.
- Module-based pricing means the platform gets expensive quickly once you add audit, compliance and continuity to a security-led purchase, and modules bought later rarely carry the discount of the original deal.
- The IT and cyber compliance side is thinner than dedicated tools, so organisations chasing SOC 2 or ISO 27001 evidence automation will find it does not replace a Drata or Vanta.
- Reporting is capable but the drag and drop builder has a real learning curve, and organisations that do not train an internal administrator end up raising support tickets for changes that should be self-service.
Pricing, plan by plan
Proton Mail
FreeNo published plan breakdown. See the Proton Mail review.
Resolver
On request- Resolver Core$undefined/year
- Priced by modules selected and number of users
- Annual or multi-year enterprise agreement
- Implementation and configuration quoted separately
Which should you pick?
Choose Resolver if
- You need incident management.
- You work on Web, iOS, Android.
- You also want investigations.
Questions people ask
- Is Proton Mail or Resolver better?
- Neither clearly leads. Proton Mail starts at Free and Resolver at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Proton Mail or Resolver?
- Proton Mail has a free tier; the other does not. Paid plans start at Free for Proton Mail and On request for Resolver.
- Does Proton Mail or Resolver run on more platforms?
- Proton Mail runs on Web. Resolver runs on Web, iOS, Android.
- Can I use Proton Mail for free?
- Yes. Proton Mail has a free tier, so you can try it without paying. Resolver starts at On request.
- What is Proton Mail best used for?
- Proton Mail is most often used for encrypted email communication, privacy-focused email service, family email protection. Of those, encrypted email communication and privacy-focused email service are not what Resolver is typically brought in for.
- What can Proton Mail do that Resolver cannot?
- Resolver covers Incident management, Investigations, Enterprise risk management, Internal audit.
Answered from the vendors’ own pages
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.
SourceResolver: Who owns Resolver?
Kroll, which acquired it in 2022. It is marketed as a Kroll business and sold alongside Kroll risk and investigations services.
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.
SourceResolver: What does Resolver cost?
Pricing is not published. It is quoted by module and user count on an annual or multi-year enterprise agreement, with implementation charged separately.
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.
SourceResolver: Is Resolver a SOC 2 compliance tool?
No. It is a risk, incident and investigations platform. Automated evidence collection for security certifications is not its strength.
Proton Mail: Does Proton Mail offer a money-back guarantee?
Yes, Proton Mail provides a 30-day money-back guarantee for paid plans.
SourceResolver: How long does implementation take?
Months rather than weeks for a multi-module deployment, and most customers use vendor or partner services to configure it.
Related pages
More on Proton Mail
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