Best SIEM Software (2026)
9 siem tools ranked on real review data, live pricing and feature coverage — refreshed automatically.
Wazuh
8.3/10Best for Teams wanting a free, open-source SIEM/XDR they can self-host (or run as managed cloud).
The best siem software in 2026 is Wazuh — best for teams wanting a free, open-source SIEM/XDR they can self-host (or run as managed cloud). It scores 8.3/10 on our data-weighted ranking (4.5/5 (~59 G2 reviews)) and starts at $571/mo (Cloud, up to 100 agents). Elastic Security is the strongest runner-up. Full comparison table and per-tool breakdown below — all figures stamped with a data-as-of date and linked sources.
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Best for Teams wanting a free, open-source SIEM/XDR they can self-host (or run as managed cloud).
- Open-source SIEM + XDR
- Log analysis + file integrity monitoring
- Vulnerability detection
Overview · Pricing · Review · Alternatives
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Best for Teams wanting an open, search-powered SIEM with consumption pricing and no per-endpoint fees.
- Search-powered SIEM + analytics
- Built-in EDR + cloud security
- Prebuilt detection rules + MITRE ATT&CK
Overview · Pricing · Review · Alternatives
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Best for Microsoft-centric orgs wanting a cloud-native SIEM with deep Entra/Defender integration.
- Cloud-native SIEM + SOAR
- Native Entra ID + Defender + M365 connectors
- KQL hunting + analytics rules
Overview · Pricing · Review · Alternatives
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Best for Large enterprises needing deep, mature SIEM with extensive integrations and log analytics.
- Industry-leading SPL search + analytics
- Risk-based alerting + correlation
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Overview · Pricing · Review · Alternatives
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Best for Lean IT teams wanting easy SIEM + detection with a free tier.
- Cloud SIEM
- Automated detections + playbooks
- 24/7 SecOps support
Overview · Pricing · Review · Alternatives
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Best for Cloud-native teams wanting log analytics + Cloud SIEM with a credit-based consumption model.
- Cloud-native log analytics
- Cloud SIEM + Cloud SOAR
- Credit-based flexible consumption
Overview · Pricing · Review · Alternatives
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Best for Teams wanting SIEM-grade threat detection without Splunk-level cost or complexity.
- Free open-source tier
- SIEM with MITRE ATT&CK mapping
- Sigma rules + UEBA + risk scoring
Overview · Pricing · Review · Alternatives
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Best for Security teams wanting AI/UEBA-driven SIEM, available cloud-native or self-hosted (LogRhythm SIEM).
- Cloud-native + on-prem SIEM options
- Behavioral analytics (UEBA)
- Exabeam Copilot (AI)
Overview · Pricing · Review · Alternatives
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Best for MSSPs and enterprises wanting a cloud-native SIEM with deep UEBA and GB/day consumption pricing.
- Cloud-native SIEM on Snowflake
- UEBA behavioral analytics
- Built-in SOAR + threat intel
Overview · Pricing · Review · Alternatives
No products match these filters.
| Tool | Best for | Starting price | Free trial | Reviews | Our score /10 |
|---|---|---|---|---|---|
| Wazuh | Teams wanting a free, open-source SIEM/XDR they can self-host (or run as managed cloud) | $571/mo (Cloud, up to 100 agents) | Free tier + 14 days | 4.5 (59) | 8.3 |
| Elastic Security | Teams wanting an open, search-powered SIEM with consumption pricing and no per-endpoint fees | Free tier available | Free tier + 14 days | 4.5 (23) | 8.2 |
| Microsoft Sentinel | Microsoft-centric orgs wanting a cloud-native SIEM with deep Entra/Defender integration | $4.3/GB ingested (PAYG, East US) | 31 days | 4.4 (289) | 8.1 |
| Splunk Enterprise Security | Large enterprises needing deep, mature SIEM with extensive integrations and log analytics | Custom quote | 14 days | 4.3 (222) | 8.1 |
| Blumira | Lean IT teams wanting easy SIEM + detection with a free tier | Free tier available | Free tier + 14 days | 4.6 (120) | 8.1 |
| Sumo Logic | Cloud-native teams wanting log analytics + Cloud SIEM with a credit-based consumption model | Free tier available | Free tier + 30 days | 4.3 (338) | 8.1 |
| Graylog Security | Teams wanting SIEM-grade threat detection without Splunk-level cost or complexity | $18000/yr (Security, 10 GB/day) | Free tier + 14 days | 4.4 (116) | 8.1 |
| Exabeam New-Scale Platform | Security teams wanting AI/UEBA-driven SIEM, available cloud-native or self-hosted (LogRhythm SIEM) | Custom quote | — | 4.6 (14) | 7.6 |
| Securonix Unified Defense SIEM | MSSPs and enterprises wanting a cloud-native SIEM with deep UEBA and GB/day consumption pricing | Custom quote | — | 3.9 (13) | 7.0 |
SIEM Leaders Matrix
Every tracked tool plotted by ability to deliver (our data-weighted score) against market presence (independent review volume). Top-right is a market leader — hover any logo. How this is scored →
- 1 Wazuh 8.3
- 2
Elastic Security 8.2 - 3
Microsoft Sentinel 8.1 - 4
Splunk Enterprise Security 8.1 - 5
Blumira 8.1 - 6
Sumo Logic 8.1 - 7
Graylog Security 8.1 - 8
Exabeam New-Scale Platform 7.6 - 9
Securonix Unified Defense SIEM 7.0
How to choose
When choosing siem software, weigh four things against your environment: pricing model (per-endpoint vs per-technician vs per-user — it changes total cost dramatically at scale), deployment and integration fit with your existing stack, breadth of automation, and independent review scores. The table above ranks every tracked option on the data we hold; use the per-tool notes to match capabilities to your use case.
Budgeting the whole stack? Use our MSP software cost calculator to estimate monthly and annual spend for siem alongside the rest of your tools, using real published pricing.
Buyer's guide
How we ranked the best siem software
We score every tool on a transparent 0–10 scale weighted from third-party review data (G2/Capterra, adjusted for review volume), published pricing, and verified feature breadth — never opinion alone. All figures were last checked June 2026 and every row links its source.
Pricing models in siem software
Across the 9 tracked tools, billing runs on flat, per gb, quote, per user models — which changes total cost dramatically at scale, so compare on your endpoint or technician count, not headline price. Microsoft Sentinel carries the lowest published entry price at $4.3/GB ingested (PAYG, East US). Wazuh, Elastic Security, Blumira offer a genuinely free tier; several others run free trials.
Who each is for
- Wazuh — Teams wanting a free, open-source SIEM/XDR they can self-host (or run as managed cloud). 8.3/10, from $571/mo (Cloud, up to 100 agents) (4.5/5 (~59 G2 reviews)).
- Elastic Security — Teams wanting an open, search-powered SIEM with consumption pricing and no per-endpoint fees. 8.2/10, from Free tier available (4.5/5 (~23 G2 reviews)).
- Microsoft Sentinel — Microsoft-centric orgs wanting a cloud-native SIEM with deep Entra/Defender integration. 8.1/10, from $4.3/GB ingested (PAYG, East US) (4.4/5 (~289 G2 reviews)).
- Splunk Enterprise Security — Large enterprises needing deep, mature SIEM with extensive integrations and log analytics. 8.1/10, from Custom quote (4.3/5 (~222 G2 reviews)).
- Blumira — Lean IT teams wanting easy SIEM + detection with a free tier. 8.1/10, from Free tier available (4.6/5 (~120 G2 reviews)).
- Sumo Logic — Cloud-native teams wanting log analytics + Cloud SIEM with a credit-based consumption model. 8.1/10, from Free tier available (4.3/5 (~338 G2 reviews)).
Our pick
On the data we hold, Wazuh leads at 8.3/10. The open-source SIEM/XDR of choice — free to license and genuinely capable, if you can invest the engineering to run it. Read the full Wazuh review or compare it head-to-head below.
Frequently asked questions
- What is the best siem software in 2026?
- Wazuh ranks first in our data-weighted comparison (8.3/10, 4.5/5 (~59 G2 reviews)), starting at $571/mo (Cloud, up to 100 agents).
- What is the cheapest siem software?
- Among tracked options, Microsoft Sentinel has the lowest published starting price at $4.3/GB ingested (PAYG, East US). Pricing models differ, so compare per-endpoint vs per-technician costs for your fleet size.
- Is there a free siem software option?
- Wazuh offers a free tier. Several others provide free trials — see the pricing column in the table above.