Graylog Security Review (2026)
- Starting price
- $18000/yr (Security, 10 GB/day)
- Free trial
- Free tier + 14 days
- Deployment
- Cloud + self-host
- Best for
- Teams wanting SIEM-grade threat detection without Splunk-level cost or complexity
Verdict: 8.1/10
Graylog Security earns 8.1/10 in our review, weighted from 4.4/5 (~116 G2 reviews) and its feature/pricing profile. The pragmatic mid-market SIEM — much of Splunk's value at a fraction of the cost, with a credible free tier to start. Best for teams wanting siem-grade threat detection without splunk-level cost or complexity. Starting price: $18000/yr (Security, 10 GB/day).
Based on aggregated third-party ratings (4.4/5 (~116 G2 reviews)) and Graylog Security's published feature and pricing data. Hands-on testing notes are added as we trial each tool — see how we test.
Pros
- Strong value vs Splunk
- Real free self-hosted tier
- Data Lake avoids ingestion tax
Cons
- Enterprise pricing requires sales
- Inherits Elastic/OpenSearch ops complexity
- Limited OTLP/observability scope
Features
- Free open-source tier
- SIEM with MITRE ATT&CK mapping
- Sigma rules + UEBA + risk scoring
- Pipeline-based enrichment
- Data Lake (untaxed retention)
- Built on Elasticsearch/OpenSearch
How it compares
| Graylog Security | Blumira | Microsoft Sentinel | |
|---|---|---|---|
| Starting price | $18000/yr (Security, 10 GB/day) | Free tier available | $4.3/GB ingested (PAYG, East US) |
| Pricing model | per gb | per user | per gb |
| Free trial / tier | Free tier + 14 days | Free tier + 14 days | 31 days |
| Best for | Teams wanting SIEM-grade threat detection without Splunk-level cost or complexity | Lean IT teams wanting easy SIEM + detection with a free tier | Microsoft-centric orgs wanting a cloud-native SIEM with deep Entra/Defender integration |
| Deployment | Cloud + self-host | Cloud | Cloud |
| G2 rating | 4.4/5 (116) | 4.6/5 (120) | 4.4/5 (289) |
| Capterra rating | — | — | — |
| Our score | 8.1 | 8.1 | 8.1 |
Affiliate link: Graylog Security may pay us a commission if you sign up through this link. It never affects our data-driven ranking.
Full review
Graylog Security review — 8.1/10
The pragmatic mid-market SIEM — much of Splunk’s value at a fraction of the cost, with a credible free tier to start. Our score weights 4.4/5 (~116 G2 reviews) against feature breadth and pricing value.
Core features
- Free open-source tier
- SIEM with MITRE ATT&CK mapping
- Sigma rules + UEBA + risk scoring
- Pipeline-based enrichment
- Data Lake (untaxed retention)
- Built on Elasticsearch/OpenSearch
Pricing value
Graylog Security starts at $18000/yr (Security, 10 GB/day) on a per gb model with a free tier. See the full pricing breakdown.
Pros & cons
Pros: Strong value vs Splunk; Real free self-hosted tier; Data Lake avoids ingestion tax.
Cons: Enterprise pricing requires sales; Inherits Elastic/OpenSearch ops complexity; Limited OTLP/observability scope.
Who should buy Graylog Security
Best for teams wanting siem-grade threat detection without splunk-level cost or complexity. If that is not you, weigh the alternatives.
Frequently asked questions
- Is Graylog Security worth it?
- Graylog Security earns 8.1/10 in our review, weighted from 4.4/5 (~116 G2 reviews) and its feature/pricing profile. The pragmatic mid-market SIEM — much of Splunk's value at a fraction of the cost, with a credible free tier to start. Best for teams wanting siem-grade threat detection without splunk-level cost or complexity. Starting price: $18000/yr (Security, 10 GB/day).
- What does Graylog Security cost?
- From $18000/yr (Security, 10 GB/day) — see the pricing page.