Best SIEM Software · 2026
Microsoft Sentinel vs 
Securonix Unified Defense SIEM Microsoft Sentinel vs Securonix Unified Defense SIEM: on our data-weighted scoring, Microsoft Sentinel edges ahead (8.1 vs 7.0/10). Microsoft Sentinel starts at $4.3/GB ingested (PAYG, East US) and is best for microsoft-centric orgs wanting a cloud-native SIEM with deep Entra/Defender integration; Securonix Unified Defense SIEM starts at Custom quote and is best for MSSPs and enterprises wanting a cloud-native SIEM with deep UEBA and GB/day consumption pricing. Choose Microsoft Sentinel for the stronger overall track record; consider Securonix Unified Defense SIEM if its pricing model or fit matches your environment better. Side-by-side table below.
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Six criteria, each scored 0–10 on the same scale from real review data, public pricing and feature coverage. See our methodology →
| Criterion | Microsoft Sentinel | Securonix Unified Defense SIEM |
|---|---|---|
| Editorial | 8.1 | 7.0 |
| User reviews | 8.8 | 7.8 |
| Adoption | 6.5 | 3.0 |
| Affordability | 6.8 | 5.0 |
| Feature breadth | 6.0 | 6.0 |
| Ease of trial | 6.0 | 3.0 |
| Microsoft Sentinel | Securonix Unified Defense SIEM | |
|---|---|---|
| Starting price | $4.3/GB ingested (PAYG, East US) | Custom quote |
| Pricing model | per gb | quote |
| Free trial / tier | 31 days | — |
| Best for | Microsoft-centric orgs wanting a cloud-native SIEM with deep Entra/Defender integration | MSSPs and enterprises wanting a cloud-native SIEM with deep UEBA and GB/day consumption pricing |
| Deployment | Cloud | Cloud |
| G2 rating | 4.4/5 (289) | 3.9/5 (13) |
| Capterra rating | — | — |
| Our score | 8.1 | 7.0 |
You need microsoft-centric orgs wanting a cloud-native siem with deep entra/defender integration.
You need mssps and enterprises wanting a cloud-native siem with deep ueba and gb/day consumption pricing.
Microsoft Sentinel bills on a per gb model from $4.3/GB ingested (PAYG, East US) (31 days trial), while Securonix Unified Defense SIEM uses a quote model from Custom quote. Because the models differ, the cheaper option flips depending on your fleet size — model both at your seat/endpoint count.
Microsoft Sentinel ships 6 headline capabilities (Cloud-native SIEM + SOAR, Native Entra ID + Defender + M365 connectors, KQL hunting + analytics rules, UEBA + ML anomaly detection) and deploys Cloud. Securonix Unified Defense SIEM ships 6 (Cloud-native SIEM on Snowflake, UEBA behavioral analytics, Built-in SOAR + threat intel, GB/day consumption + DPM Flex), deploying Cloud.
Microsoft Sentinel holds 4.4/5 (~289 G2 reviews); Securonix Unified Defense SIEM holds 3.9/5 (~13 G2 reviews). On our data-weighted score, Microsoft Sentinel edges ahead (8.1 vs 7.0/10). Pick Securonix Unified Defense SIEM instead when mssps and enterprises wanting a cloud-native siem with deep ueba and gb/day consumption pricing. See Microsoft Sentinel alternatives or Securonix Unified Defense SIEM alternatives.
