The best Log Management & SIEM
Every option ranked — open-source, self-hostable, and commercial — by our transparent Sovereignty Score, with honest trade-offs so you choose what fits you, not us.
Tools that ingest, index, search, and alert on logs and events at scale — the backbone of troubleshooting and security analytics (SIEM), distinct from metrics-first infrastructure monitoring.
L3Infrastructure — layer 3 of the AI stack- 1
OpenSearch
Top pickOpen sourceThe Apache-2.0 search and log-analytics platform (the Elasticsearch fork).
Free / self-host; managed options available from AWS and others · in our Splunk comparison →
What is OpenSearch? →88sovereignty - 2
Grafana Loki
Open sourceCost-efficient log aggregation that indexes labels, not full text.
Free / self-host; optional Grafana Cloud · in our Splunk comparison →
What is Grafana Loki? →86sovereignty - 3
SigNoz
Open sourceOpenTelemetry-native logs, traces, and metrics in one app.
Free / self-host; optional managed cloud · in our Splunk comparison →
What is SigNoz? →84sovereignty
Run these yourself
What each one actually needs — real RAM, honest running cost, and the setup time nobody quotes.
- Self-hosting OpenSearch 8 GB heap on a 16 GB machine
- Self-hosting Grafana Loki 4 GB
- Self-hosting SigNoz 8 GB
Replacing a specific tool?
Head-to-head comparisons for each popular log management & siem product.
Straight head-to-heads
Two log management & siem tools, side by side — verified facts and a plain verdict.