Cybersecurity · head to head
Microsoft Sentinel vs Proton Mail
The short version
- Each has a real cost: Microsoft Sentinel billing is driven by the volume of log data ingested per day, so cost scales with log noise rather than with users or protected assets; Proton Mail paid plan pricing not displayed on vendor site
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which Microsoft Sentinel and Proton Mail actually diverge.
| Attribute | Microsoft Sentinel | Proton Mail |
|---|---|---|
| Pricing model | usage-based | freemium |
| Platforms | Web, Api | Web |
| Founded | 1975 | Unknown |
Identical on both: starting price (Free), free tier (Yes), 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 Microsoft Sentinel
- AI-powered analytics
- Fusion detection
- UEBA
- Automated response playbooks
- Threat intelligence
- Hunting queries
- Workbooks
- Incident management
Only in Proton Mail
Nothing recorded that Microsoft Sentinel does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
Microsoft Sentinel
- Cloud-based security information and event management (SIEM)not Proton Mail
- Extended detection and response (XDR) across enterprise infrastructurenot Proton Mail
- Data ingestion and long-term security analyticsnot Proton Mail
Proton Mail
- Encrypted email communicationnot Microsoft Sentinel
- Privacy-focused email servicenot Microsoft Sentinel
- Family email protectionnot Microsoft Sentinel
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Microsoft Sentinel
- Billing is driven by the volume of log data ingested per day, so cost scales with log noise rather than with users or protected assets
- Commitment tier discounts require reserving daily ingestion capacity in advance, and a tier cannot be downgraded until 31 days have passed
- Commitment tiers start at 100 GB per day, above what smaller estates ingest
- Charges for Log Analytics, Logic Apps and Machine Learning are billed separately on top of Sentinel itself
- The free allowance is only up to 5 MB per user per day for selected Microsoft 365 security logs
- Promotional commitment pricing is time limited and locks in only until a stated end date
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
Microsoft Sentinel
Free- Pay-As-You-Go$2.46/day
- Per GB ingested
- 90-day retention
- First 31 days free for new workspaces
- Commitment TiersFree
- 100GB to 50TB tiers
- Up to 65% discount
- Predictable billing
- Microsoft 365 E5Free
- Free data ingestion for M365 logs
- Bundled with E5 license
Proton Mail
FreeNo published plan breakdown. See the Proton Mail review.
Which should you pick?
Choose Microsoft Sentinel if
- You need ai-powered analytics.
- You want to start without paying.
- You work on Web, Api.
- You also want fusion detection.
Questions people ask
- Is Microsoft Sentinel or Proton Mail better?
- Neither clearly leads. Microsoft Sentinel starts at Free and Proton Mail at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Microsoft Sentinel or Proton Mail?
- Microsoft Sentinel starts at Free and Proton Mail at Free.
- Does Microsoft Sentinel or Proton Mail run on more platforms?
- Microsoft Sentinel runs on Web, Api. Proton Mail runs on Web.
- Can I use Microsoft Sentinel for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Microsoft Sentinel best used for?
- Microsoft Sentinel is most often used for cloud-based security information and event management (siem), extended detection and response (xdr) across enterprise infrastructure, data ingestion and long-term security analytics. Of those, cloud-based security information and event management (siem) and extended detection and response (xdr) across enterprise infrastructure are not what Proton Mail is typically brought in for.
- What can Microsoft Sentinel do that Proton Mail cannot?
- Microsoft Sentinel covers AI-powered analytics, Fusion detection, UEBA, Automated response playbooks.
Answered from the vendors’ own pages
Microsoft Sentinel: How is Microsoft Sentinel pricing calculated?
Microsoft Sentinel uses a pay-as-you-go usage-based model where you pay only for data ingested, stored, and consumed. Flexible commitment tiers are available to reduce total cost of ownership, with specific rates not published on the public pricing page. Source: https://www.microsoft.com/security/business/siem-and-xdr/microsoft-sentinel/
SourceProton 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.
SourceMicrosoft Sentinel: Does Microsoft Sentinel require an Azure subscription?
Yes, Microsoft Sentinel requires a Microsoft Azure subscription to operate. Pricing is handled through Azure and varies based on data consumption and the commitment tier you select. Source: https://www.microsoft.com/security/business/siem-and-xdr/microsoft-sentinel/
SourceProton 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.
SourceProton 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 Microsoft Sentinel
More on Proton Mail
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- Proton Mail vs Arnica
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