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Open Source Splunk Alternatives

The best open source alternative to Splunk is Grafana. If that doesn't suit you, our users have ranked more than 50 alternatives to Splunk and 16 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Splunk are Prometheus, Graylog, Logstash and Loki.

Splunk alternatives are mainly Web Log Analyzers but may also be Log Management Tools or Log Analyzers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Splunk.
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Splunk iconSplunk
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  • FreemiumProprietary
  • Mac
  • Windows
  • Linux

Splunk is software that provides unique visibility across your entire IT infrastructure from one place in real time. Only...

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  1. Grafana icon

    Grafana

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    • Cloudron
    • Node.JS

    Grafana provides a powerful and elegant way to create, explore, and share dashboards and data with your team and the world.

    Screenshot
    Grafana vs Splunk opinions
    Some users think Grafana is a great alternative to Splunk, some don't.

    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.

    Negative comment ago
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    11

    It's not a SIEM tool. Rather, it just displays arbitrary data.

    Negative comment ago
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    -4
  2. Prometheus icon

    Prometheus

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Cloudron

    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.

    Screenshot
    Prometheus vs Splunk opinions
    pros, cons and recent comments

    System / performance monitoring centric

    Negative comment ago
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    1


  3. Graylog icon

    Graylog

    • FreeOpen Source
    • Mac
    • Linux
    • Self-Hosted
    • Java

    Graylog is an open source syslog implementation that stores your logs in Elasticsearch. It consists of a server and web interface written in Java that accepts your syslog messages via TCP or UDP (or GELF messages) and stores it in the database.

    Screenshot
    Graylog vs Splunk opinions
    Most users think Graylog is a great alternative to Splunk.

    Pretty easy to setup once you figure out the log capture scripts. Then it's very powerful and realiable.

    Positive comment ago
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    0

    freeware with good documentation

    Positive comment ago
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    0
  4. Logstash icon

    Logstash

    • FreeOpen Source
    • Linux
    • Java Mobile
    • BSD

    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.".

    sample logs in Kibana
    Logstash vs Splunk opinions
    Some users think Logstash is a great alternative to Splunk, some don't.

    The "L" in the ELK-Stack. i. E. part of a splunk alternative

    Positive comment ago
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    0
  5. Loki icon

    Loki

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted

    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.

    No screenshots yet


  6. Graphite icon

    Graphite

    • FreeOpen Source
    • Mac
    • Linux
    • Python
    • fontconfig
    • Django

    Graphite is a highly scalable real-time graphing system.

    Graphite Browser Web Interface
  7. Fluentd icon

    Fluentd

    • FreeOpen Source
    • Mac
    • Linux

    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.

    Screenshot
  8. Prelude icon

    Prelude

    • FreeOpen Source
    • Linux

    Prelude is a Universal Security Information & Event Management (SIEM) system. It collects, normalizes, sorts, aggregates, correlates and reports all security-related events independently of the product brand or license giving rise to such events.

    Alert module is the heart of Prelude SIEM's in-depth detection
  9. SIEMonster icon

    SIEMonster

    • FreeOpen Source
    • Linux
    • Self-Hosted

    A very powerful and well documented open source SIEM with options to purchase support packages.

    Screenshot
  10.  Apache Flink icon

    Apache Flink

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD

    Flink’s core is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations over data streams.

    No screenshots yet
Showing 10 of 16 alternatives