Leona

Free plan APISelf-hostedWeb

What Leona is

Leona is a free, open-source log management system that organizations deploy themselves through web access, REST APIs, or documented configuration. It aggregates, organizes, and analyzes log data. Streams place incoming messages into real-time categories using team rules, while processing pipelines can route, deny, modify, or enrich those messages. Search uses simplified Lucene-like syntax with relative or absolute time ranges. Dashboards present indicators, charts, graphs, and maps through widgets. Event definitions can create events and send notifications when conditions are met. Index sets configure retention, sharding, replication, and rotation for data held in OpenSearch or Elasticsearch; MongoDB stores application data. A Docker Compose quickstart opens the interface in a browser on port 9000. Leona is Apache 2.0 licensed, with security guidance covering current and previous releases from the last twelve months.

Who it suits

Leona suits teams needing self-hosted log aggregation, processing, search, dashboards, and alerts. It is appropriate for users comfortable deploying Docker Compose and managing OpenSearch or Elasticsearch storage.

What it does well

Free and open-source under Apache 2.0
Real-time streams and processing pipelines
Lucene-like search with time ranges
Dashboards include charts and maps
REST API documentation available

What to know first

Self-hosted deployment required
Storage setup uses OpenSearch or Elasticsearch
Older releases may fall outside security coverage

Plans

Plan	Billed and limits	Price
Leona	Free and open source log management	Free

As github.com lists them, read 12 Oct 2026. The maker's own page has the final word.

Verdict

Leona combines log collection, processing, search, visualization, and alerting in a self-hosted system. Its free license and configurable storage appeal to teams prepared to operate the deployment themselves.

Facts from Leona's own pages

Alerts: Event definitions contain conditions that can create events and trigger notifications when conditions are met. · github.com, 12 Oct 2026
API: The project documentation lists REST APIs as a configuration topic. · github.com, 12 Oct 2026
Dashboards: Dashboards use widgets to summarize or visualize log data with indicators, charts, graphs, and maps. · github.com, 12 Oct 2026
Data retention: Index sets configure retention, sharding, and replication, with retention and rotation strategy set per index. · github.com, 12 Oct 2026
Deployment: The quickstart installs LeonaLog with Docker Compose and opens its interface in a browser on port 9000. · github.com, 12 Oct 2026
Free plan: Yes · github.com, 22 Sept 2026
License: Leona is released under the Apache License, Version 2.0. · github.com, 12 Oct 2026
Log pipelines: Yes · github.com, 22 Sept 2026
Processing: Processing pipelines can route, deny, modify, and enrich messages as they flow through LeonaLog. · github.com, 12 Oct 2026
Purpose: LeonaLog is a centralized log management system for aggregating, organizing, and analyzing log data. · github.com, 12 Oct 2026
REST API: The documentation navigation includes REST API documentation, and the server configuration exposes a REST listen URI. · github.com, 12 Oct 2026
Search: The search page uses a simplified syntax similar to Lucene and supports configurable relative or absolute time ranges. · github.com, 12 Oct 2026
Security: The README links to documentation about ModSecurity, user activity logging, and URL whitelisting. · github.com, 12 Oct 2026
Security updates: The security policy says vulnerabilities are addressed for current and previous releases from the last twelve months and recommends upgrading older versions. · github.com, 12 Oct 2026
Storage: Index sets configure retention, sharding, and replication for data stored in OpenSearch and Elasticsearch. · github.com, 12 Oct 2026
Storage integrations: The documented server configuration connects to OpenSearch or Elasticsearch for indexes and MongoDB for application data. · github.com, 12 Oct 2026
Streams: Streams route incoming messages into categories in real time using team rules. · github.com, 12 Oct 2026
Support: The project directs bug reports and improvement ideas to GitHub Issues. · github.com, 12 Oct 2026
Vulnerability reporting: The security policy asks users to report critical vulnerabilities by email before publishing them and allows non-critical reports by email or GitHub issue. · github.com, 12 Oct 2026

Where Leona stands on Freedom251

Log Management Software#37 of 111