Developer Tools · head to head
Keil MDK vs Microsoft Sentinel
Keil MDK
Developer Tools
Microcontroller Development Kit for Arm-based devices
- From
- Free
- Free plan
- Yes
Microsoft Sentinel
Cybersecurity
Cloud-native SIEM and SOAR solution
- From
- Free
- Free plan
- Yes
The short version
- Each has a real cost: Keil MDK pricing for Essential and Professional subscriptions not disclosed on primary site; 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
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which Keil MDK and Microsoft Sentinel actually diverge.
| Attribute | Keil MDK | Microsoft Sentinel |
|---|---|---|
| Pricing model | freemium | usage-based |
| Platforms | Web | Web, Api |
| Category | Developer Tools | Cybersecurity |
| Founded | Unknown | 1975 |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
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 Keil MDK
Nothing recorded that Microsoft Sentinel does not also cover.
Only in Microsoft Sentinel
- AI-powered analytics
- Fusion detection
- UEBA
- Automated response playbooks
- Threat intelligence
- Hunting queries
- Workbooks
- Incident management
What people use each for
The jobs each tool is most often brought in to do.
Keil MDK
- Embedded software developmentnot Microsoft Sentinel
- ARM microcontroller programmingnot Microsoft Sentinel
- Professional development environmentsnot Microsoft Sentinel
Microsoft Sentinel
- Cloud-based security information and event management (SIEM)not Keil MDK
- Extended detection and response (XDR) across enterprise infrastructurenot Keil MDK
- Data ingestion and long-term security analyticsnot Keil MDK
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Keil MDK
- Pricing for Essential and Professional subscriptions not disclosed on primary site
- Customers must contact Arm Developer Tools store for subscription rates
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
Pricing, plan by plan
Keil MDK
FreeNo published plan breakdown. See the Keil MDK review.
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
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 Keil MDK or Microsoft Sentinel better?
- Neither clearly leads. Keil MDK starts at Free and Microsoft Sentinel at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Keil MDK or Microsoft Sentinel?
- Keil MDK starts at Free and Microsoft Sentinel at Free.
- Does Keil MDK or Microsoft Sentinel run on more platforms?
- Keil MDK runs on Web. Microsoft Sentinel runs on Web, Api.
- Can I use Keil MDK for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Keil MDK best used for?
- Keil MDK is most often used for embedded software development, arm microcontroller programming, professional development environments. Of those, embedded software development and arm microcontroller programming are not what Microsoft Sentinel is typically brought in for.
- What can Keil MDK do that Microsoft Sentinel cannot?
- Microsoft Sentinel covers AI-powered analytics, Fusion detection, UEBA, Automated response playbooks.
Answered from the vendors’ own pages
Keil MDK: Does Keil MDK have a free version?
Yes, Keil MDK Community Edition is free for non-commercial projects. Essential and Professional editions are available as monthly or annual subscriptions.
SourceMicrosoft 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/
SourceKeil MDK: How much do Keil MDK paid editions cost?
Specific pricing for Essential and Professional editions is not published on the main site. Rates are available from the Arm Developer Tools store or by contacting Arm sales.
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/
SourceRelated pages
More on Microsoft Sentinel
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