Best SIEM Software · 2026
Graylog Security vs 
Splunk Enterprise Security Graylog Security vs Splunk Enterprise Security: on our data-weighted scoring, Graylog Security edges ahead (8.1 vs 8.1/10). Graylog Security starts at $18000/yr (Security, 10 GB/day) and is best for teams wanting siem-grade threat detection without splunk-level cost or complexity; Splunk Enterprise Security starts at Custom quote and is best for large enterprises needing deep, mature siem with extensive integrations and log analytics. Choose Graylog Security for the stronger overall track record; consider Splunk Enterprise Security 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 | Graylog Security | Splunk Enterprise Security |
|---|---|---|
| Editorial | 8.1 | 8.1 |
| User reviews | 8.8 | 8.6 |
| Adoption | 5.5 | 6.2 |
| Affordability | 9.5 | 5.0 |
| Feature breadth | 6.0 | 7.0 |
| Ease of trial | 10.0 | 6.0 |
| Graylog Security | Splunk Enterprise Security | |
|---|---|---|
| Starting price | $18000/yr (Security, 10 GB/day) | Custom quote |
| Pricing model | per gb | quote |
| Free trial / tier | Free tier + 14 days | 14 days |
| Best for | Teams wanting SIEM-grade threat detection without Splunk-level cost or complexity | Large enterprises needing deep, mature SIEM with extensive integrations and log analytics |
| Deployment | Cloud + self-host | Cloud + on-prem |
| G2 rating | 4.4/5 (116) | 4.3/5 (222) |
| Capterra rating | — | — |
| Our score | 8.1 | 8.1 |
You need teams wanting siem-grade threat detection without splunk-level cost or complexity.
You need large enterprises needing deep, mature siem with extensive integrations and log analytics.
Splunk Enterprise Security bills on a quote model from Custom quote (14 days trial), while Graylog Security uses a per gb model from $18000/yr (Security, 10 GB/day) (free tier available). Because the models differ, the cheaper option flips depending on your fleet size — model both at your seat/endpoint count.
Splunk Enterprise Security ships 7 headline capabilities (Industry-leading SPL search + analytics, Risk-based alerting + correlation, 2, 800+ integrations) and deploys Cloud + on-prem. Graylog Security ships 6 (Free open-source tier, SIEM with MITRE ATT&CK mapping, Sigma rules + UEBA + risk scoring, Pipeline-based enrichment), deploying Cloud + self-host.
Splunk Enterprise Security holds 4.3/5 (~222 G2 reviews); Graylog Security holds 4.4/5 (~116 G2 reviews). On our data-weighted score, Splunk Enterprise Security edges ahead (8.1 vs 8.1/10). Pick Graylog Security instead when teams wanting siem-grade threat detection without splunk-level cost or complexity. See Splunk Enterprise Security alternatives or Graylog Security alternatives.