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Top 5 Free SIEM of 2021🥇

Security Information and Event Management (SIEM) is a way to centralize software to do with information and the security of an organization. This allows IT professionals to have an insight into their organization when it comes to their security and management of information.

The software combines Security Event Management (SEM) which analyses data in real time in order to monitor for cyber security threats and provide incident responses.

Security Information Management (SIM) works to collect, analyse and report data. The combination of the two make up what SIEM is. As you can imagine, this type of software is very useful to companies.

Here are the top 5 free SIEM of 2021:

  1. UTMStack

UTMStack aims to help all companies to be able to afford cyber security, and does not believe it should be a luxury. They believe in doing so as many small businesses fail due to data breaches and cyber-attacks which cost them a lot. UTMStack aims to reduce this with their service.

  1. Security Onion

Security Onion

Security Onion is an open source software that helps to hunt for threats and manage logs. Its software package includes numerous security tools which are essential to a business’s cyber security layout.

  1. Alienvault OSSIM

Alienvault OSSIM provides all the SIEM essential features required for a business. It allows users to contribute and receive real time information about malicious hosts, providing true insight into the business’s security.

  1. Splunk


Splunk aims to help accelerate a business’s digitization and ensure its resilience against cyber-attacks for now and in the future. By combining tools together, it makes it easier than ever for any business.

  1. Elastic SIEM

Elastic SIEM provides easy ways to monitor threats and have pre anomaly threat detection in place. It also helps to manage data, all through an easy to use UI. A must have for any business looking to up their cyber security game.

These are the top 5 best free SIEM software available for businesses to use. SIEM is highly recommended for cyber security and data management purposes.


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