The best free alternative to Splunk is Grafana, which is also Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Splunk and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Splunk are Graylog, Logstash, Wazuh and Prometheus.
Grafana provides a powerful and elegant way to create, explore, and share dashboards and data with your team and the world.
It's not a SIEM tool. Rather, it just displays arbitrary data.
Graylog is a powerful Security Information and Event Management (SIEM) solution offering a robust log analytics platform that simplifies the collection, search, analysis, and alerting of all types of machine-generated data.
freeware with good documentation
Pretty easy to setup once you figure out the log capture scripts. Then it's very powerful and realiable.
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.".
The "L" in the ELK-Stack. i. E. part of a splunk alternative
Wazuh is a free and open source platform used for threat prevention, detection, and response. It is capable of protecting workloads across on-premises, virtualized, containerized, and cloud-based environments.
Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community.
System / performance monitoring centric
Monitor your Laravel applications with precision. Enhance performance and reliability with error tracking, comprehensive logs, and deep insights tailored specifically for Laravel.
VictoriaMetrics can be used as long-term storage for Prometheus or for vmagent.
Grafana 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.
Unify your cloud-native monitoring with zero-code eBPF, advanced profiling, and 10x storage efficiency.
Sematext Logs is a cloud-based SaaS log management solution that offers you real-time actionable insights into your log analytics with hosted ELK as a service, in the cloud or on-premises.
With Sematext Cloud/Enterprise you can use any log shipping format or shipper you want (syslog, Logstash, Fluentd, Flume, nxlog, Filebeat). Plus, Sematext allows you to correlate logs with performance metrics quickly, easily and without contracts or commitments.
It's a hosted and on-premises log centralizing solution
Tracecat is the AI-native, open source automation platform for security teams. Build automation workflows and close cases fast. Deploy your first AI-assisted workflow in 15 minutes.
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Grafana is NOT a log monitor. It is only a graphing solution for logs and metrics from many different data sources but you will need solutions to get those logs and metrics in the first place.