Best SIEM Software · 2026
Graylog Security vs 
Securonix Unified Defense SIEM Graylog Security vs Securonix Unified Defense SIEM: on our data-weighted scoring, Graylog Security edges ahead (8.1 vs 7.0/10). 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; 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 Graylog Security 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.
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 | Securonix Unified Defense SIEM |
|---|---|---|
| Editorial | 8.1 | 7.0 |
| User reviews | 8.8 | 7.8 |
| Adoption | 5.5 | 3.0 |
| Affordability | 9.5 | 5.0 |
| Feature breadth | 6.0 | 6.0 |
| Ease of trial | 10.0 | 3.0 |
| Graylog Security | Securonix Unified Defense SIEM | |
|---|---|---|
| Starting price | $18000/yr (Security, 10 GB/day) | Custom quote |
| Pricing model | per gb | quote |
| Free trial / tier | Free tier + 14 days | — |
| Best for | Teams wanting SIEM-grade threat detection without Splunk-level cost or complexity | MSSPs and enterprises wanting a cloud-native SIEM with deep UEBA and GB/day consumption pricing |
| Deployment | Cloud + self-host | Cloud |
| G2 rating | 4.4/5 (116) | 3.9/5 (13) |
| Capterra rating | — | — |
| Our score | 8.1 | 7.0 |
You need teams wanting siem-grade threat detection without splunk-level cost or complexity.
You need mssps and enterprises wanting a cloud-native siem with deep ueba and gb/day consumption pricing.
Graylog Security bills on a per gb model from $18000/yr (Security, 10 GB/day) (free tier available), 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.
Graylog Security ships 6 headline capabilities (Free open-source tier, SIEM with MITRE ATT&CK mapping, Sigma rules + UEBA + risk scoring, Pipeline-based enrichment) and deploys Cloud + self-host. 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.
Graylog Security holds 4.4/5 (~116 G2 reviews); Securonix Unified Defense SIEM holds 3.9/5 (~13 G2 reviews). On our data-weighted score, Graylog Security 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 Graylog Security alternatives or Securonix Unified Defense SIEM alternatives.
