SIEM cost calculator
Estimate Microsoft Sentinel from Microsoft's own list prices, set it against your Splunk quote, and see an indicative SenseOn figure. Every number below is sourced, and nothing is stored or sent anywhere.
Microsoft Sentinel, list price
$211,560 a year
Analytics ingestion
150 GB a day on the cheapest option: 100 GB a day commitment tier
$162,060
Analytics retention beyond 90 days
$0.10 per GB per month, at steady state
$49,500
Data lake ingestion, processing and storage
$0.15 per GB in; $0.026 per GB per month at 6:1
$0
Splunk
Enter your quote
Your figure, as entered. Add Enterprise Security, archive and restore terms if they are quoted separately.
SenseOn, indicative
about $126,936 a year
SenseOn costs about 40% less than a traditional SIEM, applied here to: Sentinel, all data on the analytics tier ($211,560). Every source keeps detection, in every storage tier, with no per-GB ingestion charge. Your quote depends on your sources and retention.
Sentinel prices are Microsoft's US list prices for the East US region, in USD, read on 23 September 2026. They exclude tax, discounts, free allowances such as the Microsoft 365 E5 data benefit, and separately billed Azure services such as Logic Apps. Your contract, region and currency will change them.
| Item | Value used | Source |
|---|---|---|
| Sentinel analytics ingestion, pay-as-you-go | $4.30 per GB | Azure Retail Prices API |
| Sentinel commitment tiers | 50 to 50,000 GB a day; the calculator picks the cheapest, with overage at the tier rate | Microsoft Sentinel billing |
| Sentinel retention | 90 days free, then $0.10 per GB per month | Microsoft Sentinel billing |
| Sentinel data lake | $0.15 per GB in; $0.026 per GB per month stored at 6:1 | Manage data tiers in Microsoft Sentinel |
| Splunk | No published list price: enter your own quote | Splunk pricing models |
| SenseOn | About 40% lower cost than a traditional SIEM, with no per-GB ingestion charge | SenseOn pricing |
The working is explained in our Microsoft Sentinel pricing guide, Splunk pricing guide and Sentinel vs Splunk vs SenseOn comparison.
