Graylog vs OpenSearch
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
Graylog
Centralized log management and analysis platform
VS
OpenSearch
Search and observability suite with logs and dashboards
| Feature | Graylog | OpenSearch |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 90 · Excellent | 94 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | SSPL-1.0 | Apache-2.0 |
| Language | Java | Java |
| Setup difficulty | Medium | Hard |
| Min. RAM | 2,048 MB | 2,048 MB |
| Deployment | docker, bare-metal | docker, kubernetes, helm |
| GitHub stars | ★ 8,144 | ★ 13,765 |
| First released | 2010 | 2021 |
| Replaces | Splunk, Datadog Logs | Elasticsearch, Splunk |
What are Graylog and OpenSearch?
Graylog
Graylog is a centralized log management platform that collects, indexes, and analyzes machine data in real time. It offers powerful search, dashboards, and alerting for troubleshooting and security monitoring.
- Centralized log collection
- Fast full-text search
- Dashboards and alerts
- Stream-based routing
OpenSearch
OpenSearch is a community-driven search, analytics, and observability suite forked from Elasticsearch and Kibana. OpenSearch Dashboards provides log exploration, visualizations, and alerting for operational data.
- Full-text and log search
- Observability dashboards
- Anomaly detection
- Alerting plugin
Graylog vs OpenSearch: key differences
Both projects are written in Java. Licensing differs — SSPL-1.0 for Graylog versus Apache-2.0 for OpenSearch. Graylog is the more established project (first released 2010), while OpenSearch arrived in 2021.
Why pick each one
Choose Graylog if…
- Powerful search and pipelines
- Polished web UI
Watch out for
- Needs OpenSearch and MongoDB
- Memory hungry
Choose OpenSearch if…
- Truly open-source license
- Rich analytics features
Watch out for
- Resource heavy
- Cluster tuning required
Frequently asked questions
Is Graylog or OpenSearch better?
Neither is universally better. OpenSearch has the larger community, while Graylog is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Graylog and OpenSearch free and open-source?
Yes. Graylog is licensed under SSPL-1.0 and OpenSearch under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Graylog and OpenSearch with Docker?
Graylog: yes. OpenSearch: yes.