Open Source Graylog Alternatives

Logstash is an open source, server-side data processing pipeline that ingests data from a multitude of sources simultaneously, transforms it, and then sends it to your favorite "stash.".

Fluentd is a fully free and open-source log management tool that simplifies your data collection and storage pipeline. It eliminates the need to maintain a set of ad-hoc scripts.

Open Web Analytics - Web Analytics – Open Source Web Analytics Framework.

Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.

Graphite is a highly scalable real-time graphing system.

Logit.io is used for a wide variety of use cases including log management, business intelligence, SIEM, APM, container monitoring, infrastructure monitoring, monitoring website uptime, measuring sales performance & vulnerability scanning.

logsniffer is a sophisticated open source web tool for viewing, monitoring and analyzing log data. It provides a modern and intuitive end to end web interface and log viewer to keep an eye on all your logs - in one place and in real-time.

Cortex provides horizontally scalable, highly available, multi-tenant, long term storage for Prometheus.

Open source observability platform. SigNoz helps developers find issues in their deployed applications & solve them quickly.

Chronix natively speaks time series. You can store nearly every kind of data type within a time series due to its flexible design. You decide what a time series looks like. Check out the documentation of Chronix.