Top Free Security Information and Event Management (SIEM) Software

Check out our list of free Security Information and Event Management (SIEM) Software. Products featured on this list are the ones that offer a free trial version. As with most free versions, there are limitations, typically time or features.

If you'd like to see more products and to evaluate additional feature options, compare all Security Information and Event Management (SIEM) Software to ensure you get the right product.

Top 10 Free Security Information and Event Management (SIEM) Software in 2021

  • IBM Security QRadar
  • Sumo Logic
  • AlienVault USM (from AT&T Cybersecurity)
  • SolarWinds Security Event Manager
  • Datadog
  • Blumira Automated Detection & Response
  • Netsurion EventTracker
  • InsightIDR
  • Snare Solutions
  • Exabeam Security Management Platform

View Free Security Information and Event Management (SIEM) Software

G2 takes pride in showing unbiased reviews on user satisfaction in our ratings and reports. We do not allow paid placements in any of our ratings, rankings, or reports. Learn about our scoring methodologies.
(191)4.3 out of 5
Optimized for quick response
Entry Level Price:FREE for 14 Days

IBM Security QRadar helps security teams accurately detect, understand and prioritize threats that matter most to the business. The solution ingests asset, cloud, network, endpoint, and user data, correlates it against vulnerability information and threat intelligence, and applies advanced analytics to identify and track the most serious threats as they progress through the kill chain. Once a credible threat is identified, AI-powered investigations provide rapid, intelligent insights into the

lalit u.
Best in creating use cases. You need not to be a query master to create use case. Just need to have a logic. Hence, much user friendly. Read review
Dani H.
It is very useful to analyze every threat to the system in the company, a product that is highly sought after by many companies because it is... Read review
(242)4.3 out of 5
Optimized for quick response
Entry Level Price:Free

Sumo Logic is the pioneer of continuous intelligence, a new category of software, which enables organizations of all sizes to address the data challenges and opportunities presented by digital transformation, modern applications and cloud computing. The Sumo Logic Continuous Intelligence Platform™ automates the collection, ingestion and analysis of application, infrastructure, security and IoT data to derive actionable insights within seconds. More than 2,000 customers around the world rely on S

Powerful query engine, log ingest and metric analytics enable easy dashboarding of my application Read review
I like its advanced technology that makes it easier to manage cloud infrastructures. Makes maintenance operations easier, and of course, also... Read review
(107)4.4 out of 5
Optimized for quick response

AlienVault USM Anywhere is a cloud-based security management solution that accelerates and centralizes threat detection, incident response, and compliance management for your cloud, hybrid cloud, and on-premises environments. USM Anywhere includes purpose-built cloud sensors that natively monitor your Amazon Web Services (AWS) and Microsoft Azure cloud environments. On premises, lightweight virtual sensors run on Microsoft Hyper-V and VMware ESXi to monitor your virtual private cloud and physica

Matthew W.
AlienVault USM Anywhere is easy to deploy with their Cloud-based model and deploying the required agents on-prem (or in the Cloud) is quick and... Read review
Kristopher H.
I like the fact they provide a free version of their flagship product in a .ova or vmdk file format so it is quickly loaded into VMWare or... Read review

Security Event Manager (SEM) is an ACTIVE monitoring SIEM solution that automatically detects, alerts and responds to suspicious behavior on multi-vendor network devices, servers, workstations and applications. SEM comes as a downloadable virtual appliance for quick deployment, and enables threat intelligence and real-time event correlations right out-of-the-box enabling faster response to cyber-attacks.

SolarWinds LEM has not bogged down with the amount of logging data we throw at it. This is comforting because we can rest assure that we can... Read review
The ease to view everything on one page. Read review
(213)4.2 out of 5
Entry Level Price:$0 Per host, per month

Datadog is the monitoring, security and analytics platform for developers, IT operations teams, security engineers and business users in the cloud age. The SaaS platform integrates and automates infrastructure monitoring, application performance monitoring and log management to provide unified, real-time observability of our customers' entire technology stack. Datadog is used by organizations of all sizes and across a wide range of industries to enable digital transformation and cloud migration,

Datadog has powerful integration. Practically, it can be supported with almost any service and it provides data collection with specific metrics... Read review
The simple it is to get started, just install the agent and create a dashboard. Then personalize the metrics you want to track Read review
(19)4.8 out of 5
Optimized for quick response
Entry Level Price:$144 User/Year

Blumira’s cloud SIEM platform offers both automated threat detection and response, enabling organizations of any size to more efficiently defend against cybersecurity threats in near real-time. It eases the burden of alert fatigue, complexity of log management and lack of IT visibility. Blumira's cloud SIEM can be deployed in hours with broad integration coverage across cloud, endpoint protection, firewall and identity providers including Office 365, G Suite, Crowdstrike, Okta, Palo Alto, Cisc

I appreciate that every finding comes with a playbook. This empowers responders to improve security. I also appreciate that Blumira uses honeypots... Read review
The pilot project was simple, installation was easy, and the follow through on everything with Blumira's team was spectacular! This is how a... Read review
(15)4.6 out of 5

EventTracker is the only cybersecurity solution that delivers SIEM and EDR with the full support of a global Security Operations Center (SOC). This enables us to provide threat management and compliance results, all with a focus on streamlined deployment and reasonable pricing for mid-size organizations. EventTracker Security Center An award winning SIEM platform that unifies machine learning, behavior analytics, and security orchestration to make security analysts more efficient and effective.

The visibility I have into my environment and the flexibility to gather all types of log data. Their new version has made great strides in the UI. Read review
(38)4.4 out of 5
Entry Level Price:$2,156 Per Month

Rapid7 InsightIDR is a SaaS SIEM for modern threat detection and response. InsightIDR enables security analysts to work more efficiently and effectively, by unifying diverse data sources, providing early and reliable out of the box detections, and delivering rich visual investigations and automation to expedite response. With a lightweight cloud deployment and intuitive UI and onboarding experience, InsightIDR customers recognize an accelerated return on their investment and start seeing valuabl

Insight IDR has the state of the art technological features for security of your applications such as you can prioritize your searches and... Read review
I like things like automation and security orchestration about insightIDR.It also has best in class incident response system.Using smart incident... Read review
(6)4.8 out of 5
Entry Level Price:FREE 45 Days

When it comes to solving log collection and management challenges, Snare helps you save time, save money and reduce your risk. Snare Central ingests logs from Snare Agents and syslog feeds and you select which logs go where. You can collect and send to any number of SIEM systems, even multiple SIEMs from different vendors, your MSSP and/or your SOC, all while using Snare Central’s affordable archival storage options. Want to send different sets of logs to different destinations? Do you need to m

Integrates with several network security platforms and SIEMs Read review
(3)4.8 out of 5
Optimized for quick response

Exabeam is SIEM that helps security operations and insider threat teams work smarter, allowing them to detect, investigate and respond to cyberattacks in 51 percent less time. Security organizations no longer have to live with missed distributed attacks, unknown threats, and manual investigations and remediation. With the modular Exabeam Security Management Platform, analysts can use behavioral analytics to detect attacks, automate investigation and incident response, and reduce storage costs.

Exabeam a several things going for it. First it is by far the most cost effective platform out there, second the UI is extremely clean and well... Read review
(2)5.0 out of 5

Log360, our comprehensive SIEM solution helps you secure your IT environment by detecting unauthorized security changes on your network and also alerts the people responsible (admins, helpdesk). Log360 can capture the sensitive changes in your network, and present the changes to you in the form of searchable reports using which you can configure alerts. With support extending to your typical IT setups like Active Directory (AD), Azure, file servers, data storage devices, and other services l

Kumar B.
Log360 helps us integrate the components and store logs in one location. We needed a solution to stay compliant and also get to know the threats on... Read review
It captures all the logs from different types of solutions and devices real time and generate alerts based on settings. Alerts can be send via sms,... Read review
0 ratings

Event Manager is a real-time cybersecurity insight and response platform, designed to help your existing staff respond to critical security threats faster. The Security Information and Event Management (SIEM) solution identifies, records, and prioritizes potential threats and incidents across your organization, reducing alert fatigue by only generating and sending alerts when needed.

0 ratings

SOC Prime makes threat detection easier. Our core product, Threat Detection Marketplace, is a SaaS content platform that provides detection, enrichment, integration and automation algorithms to translate big data, logs and cloud telemetry into actionable signals related to cyber security. We help security professionals to detect and respond to cyber threats as early in the attack life-cycle as possible, supercharging the capabilities and increasing ROI for the majority of SIEM, EDR, NSM and SOAR

Learn More About Security Information and Event Management (SIEM) Software

What is Security Information and Event Management (SIEM) Software?

SIEM is one of the most commonly used tools for security administrators and security incident response professionals. They provide a single platform capable of facilitating event and threat protection, log analysis and investigation, and threat remediation. Some cutting-edge tools provide additional functionality for creating response workflows, data normalization, and advanced threat protection.

SIEM platforms help security programs operate by collecting security data for future analysis, storing these data points, correlating them to security events, and facilitating analysis of those events.

Companies using SIEM solutions deploy sensors across digital assets to automate the collection of data. Sensors relay information back to the SIEM’s log and event database. When additional security incidents arise, the SIEM platform detects anomalies and correlates similar logs to provide context and threat information for security teams as they attempt to remediate any existing threats or vulnerabilities.

What Does SIEM Stand For?

SIEM stands for security information and event management (SIEM), which is actually a combination of two different acronyms for security technology: security information monitoring (SIM) and security event management (SEM).

SIM is the practice of collecting, aggregating, and analyzing security data, typically in the form of logs. SIM tools automate this process and document security information for other sources such as intrusion detection systems, firewalls, or routers. Event logs and their associated informational components are recorded and stored for long periods of time for either retrospective analysis or compliance requirements.

SEM is a family of security software for discovering, analyzing, visualizing, and responding to threats as they arise. SEM is a core component of a security operations system. While SIM tools are designed for log collection and storage, SEM tools typically rely on SQL databases for storing specific logs and other event data as it is generated in real time by security devices and IT systems. They typically also provide the functionality to correlate and analyze event data, monitor systems in real time, and alert security teams of abnormal activity.

SIEM combines the functionality of both SIM and SEM to centralize control over log storage, event management, and real-time analysis. For the most part, SIM and SEM have become defunct technologies as SIEM’s rise has provided a dual-purpose functionality. SIEM software offers a single tool capable of performing data aggregation, information correlation, and event management.

What Types of Security Information and Event Management (SIEM) Software Exist?

Traditional SIEM

Traditional SIEM solutions are deployed on premises with sensors placed on IT assets to analyze events and collect system logs. The data is used to develop baseline references and identify indicators of compromise. When a system becomes compromised, the SIEM tool alerts security teams for intervention. 

Cloud or virtual SIEM

Cloud-based and virtualized SIEM software are tools typically used to secure cloud infrastructure and services delivered by a cloud provider. These tools are often less expensive than on-premises solutions and easier to implement as no physical labor is required. These tools are ideal for companies without local IT infrastructure.

Managed SIEM services

Companies that do not have a full-fledged security program in place may choose managed SIEM services to aid in management and reduce work for internal employees. These solutions are delivered by managed service providers who deliver the customer data and dashboards with security information and activity, but the provider handles implementation and remediation. 

What are the Common Features of Security Information and Event Management (SIEM) Software?

The following are some core features within SIEM software that can help users in collecting security data, analyzing logs, and detecting threats:

Activity monitoring: SIEM systems document the actions from endpoints within a network. The system alerts users of incidents and abnormal activities and documents the access point. Real-time monitoring will document these as they happen for analysis as an event takes place.

Asset management: These SIEM features keep records of each network asset and its activity. The feature may also refer to the discovery of new assets accessing the network.

Log management: Log management functionality documents and stores event logs in a secure repository for reference and analysis or for compliance reasons.

Event management: As events occur in real time, the SIEM system alerts users of incidents. This allows security teams to intervene manually or triggers an automated response to resolve the issue.

Automated response: Response automation reduces the amount of time spent diagnosing and resolving issues manually. The features are typically capable of resolving common network security incidents quickly.

Incident reporting: Incident reports document cases of abnormal activity and compromised systems. These can be used for forensic analysis or as a reference point for future incidents.

Threat intelligence: Threat intelligence feeds integrate information to train SIEM systems to detect emerging and existing threats. These threat feeds store information related to potential threats and vulnerabilities to ensure issues are discovered and teams are provided with the information necessary to resolve issues as they occur.

Vulnerability assessment: Vulnerability assessment tools may scan networks for potential vulnerabilities or audit data to discover noncompliant practices. For the most part, they’re simply used to analyze an existing network and IT infrastructure to outline access points that can be easily compromised.

Advanced analytics: Advanced analytics features allow users to customize analysis with granular or individually specific metrics that are pertinent to the business’ relevant resources.

Data examination: Data examination features typically facilitate the forensic analysis of incident data and event logs. These features will allow users to search databases and incident logs to gain insights on vulnerabilities and incidents.

What are the Benefits of Security Information and Event Management (SIEM) Software?

Below are a few of the main reasons SIEM software is commonly used to protect businesses of all sizes:

Data aggregation and correlation: SIEM systems collect huge amounts of information from an entire network environment. This information is gathered from virtually anything interacting with a network, from endpoints and servers to firewalls and antivirus tools, and is either given directly to the SIEM or using agents (decision-making programs designed to identify irregular information). The platform is set up to deploy agents and collect and store similar information together according to security policies set in place by administrators.

Incident alerting: As information comes in from a network’s various connected components, the SIEM system correlates them using rule-based policies. These policies are used to inform agents of what normal behavior and threats look like. If any action violates these policies or malware or intrusion is discovered while the SIEM solution monitors network activity, it is labeled as suspicious, security controls restrict access, and administrators are alerted.

Security analysis: Retrospective analysis may be performed by searching log data during specific periods or based on specific criteria. Security teams may suspect a certain misconfiguration or kind of malware caused an event. They also may suspect an unapproved party went undetected at a specific time. Teams will analyze the logs and look for specific characteristics in the data to determine whether their suspicion was right. They also may discover vulnerabilities or misconfigurations leaving them susceptible to attack and remediate them.

Software Related to Security Information and Event Management (SIEM) Software

Many network and system security solutions are related to the collection and analysis of event logs and security information, but SIEM systems are typically the most all-encompassing solutions available for this purpose. Still, many other kinds of security solutions may integrate with SIEM systems for added functionality or complementary use. These are a few other technology categories that are related to SIEM software.

Threat intelligence software: Threat intelligence software is an informational service that provides SIEM tools and other information security systems with up-to-date information on web-based threats. They can inform the system of zero-day threats, new forms of malware, potential exploits, and other kinds of vulnerabilities.

Incident response software: Incident response may be facilitated by SIEM systems, but these tools are specifically designed to streamline the remediation process or add investigative capabilities during security workflow processes. Incident response solutions will not provide the same level of compliance maintenance or log storage capabilities but can be used to increase a team’s ability to tackle threats as they emerge.

Network security policy management (NSPM) software: NSPM software has some overlapping functionality used to ensure security hardware and IT systems are properly configured, but they do not have the ability to detect and resolve threats. They are typically used to ensure devices like firewalls or DNS filters are functioning properly in alignment with the security rules put in place by security teams.

Intrusion detection and prevention systems (IDPS): While SIEM systems specialize in log management, alerting, and correlation, IDPS provide both additional detection and protection features to prevent unapproved parties from accessing sensitive systems and preventing network breaches. They will not facilitate the analysis and forensic investigation of logs with the same level of detail as a SIEM system.

Managed security services providers: There are a variety of managed security services available for businesses without the resources or staff necessary to operate a full-fledged security administration and operations team. Managed services are a viable option and will provide companies with skilled staff working to protect their customers’ systems and keep their sensitive information protected.

Challenges with Security Information and Event Management (SIEM) Software

Staffing: There is an existing shortage of skilled security professionals. Managing SIEM software and maintaining a well-rounded security posture require dedicated personnel with highly-specialized skills. Some smaller or growing companies may not have the means to recruit, hire, and retain qualified security pros. In such cases, businesses can consider managed services to outsource the labor. 

Compliance: Some industries have specific compliance requirements determined by various governing bodies, but SIEM software can be used across a number of industries to maintain compliance standards. Many different industry-specific compliance requirements exist, but most of them require security teams to ensure sensitive data is protected, restrict access to unapproved parties, and monitor changes made to identities, information, or privileges. For example, SIEM systems can be used to maintain GDPR compliance by verifying security controls and data access, facilitating long-term storage of log data, and notifying security staff of security incidents, as is required by GDPR.

Which Companies Should Buy Security Information and Event Management (SIEM) Software?

Vertical industries: Vertical industries, such as healthcare and financial services, often have additional compliance requirements related to data protection and privacy. SIEM is an ideal solution to keep outline requirements, map threats, and remediate vulnerabilities. 

SaaS business: SaaS businesses utilizing resources from a cloud service provider are still responsible for a significant portion of the security efforts required to protect a cloud-native business. These companies may jump for cloud-native SIEM tools but will benefit from any SIEM to prevent, detect, and respond to any threat that arises. 

How to Buy Security Information and Event Management (SIEM) Software

Requirements Gathering (RFI/RFP) for Security Information and Event Management (SIEM) Software

The first step to purchasing a SIEM solution is to outline the options. Companies should be sure whether they need a cloud-based or on-premises solution. They should also outline the number of interconnected devices they will need and whether they want physical or virtual sensors to secure them. Additional and possibly obvious requirements should also include budgetary considerations, staffing limitations, and required integrations

Compare Security Information and Event Management (SIEM) Software Products

Create a long list

Once the requirements are outlined, buyers should rank the tools by priority and identify the ones with as many of the features that fit the budget window. It is recommended to restrict the list to products with desired features, pricing, and deployment methods to identify a dozen or so options. For example, if the business needs a cloud-native SIEM for less than $10k a year, half of the options for SIEM will be eliminated. 

Create a short list

Narrowing down a short list can be tricky, especially for the indecisive, but these decisions need to be made. Once the long list is limited to affordable products with the desired features, it’s time to search for third-party validation. At this point, for each tool, the buyer must analyze end-user reviews, analyst reports, empirical security evaluations. Combining these specified factors should help rank options and eliminate poorly performing products.  

Conduct demos

With the list narrowed down to three to five possible products, businesses can reach out to vendors and schedule demos. This will help to get first-hand experience with the product, ask targeted questions, and gauge the vendors quality of service. 

Selection of Security Information and Event Management (SIEM) Software

Choose a selection team

To choose a selection team, decision makers need to involve subject matter experts from all teams that will use the system. For backup software, this primarily involves product managers, developers, IT, and security staff. Any manager or department-level leader should also include individuals managing any solution the backup product will be integrating with. 


Depending on the maturity of the business, the seniority of the negotiation team may vary. It is advisable to include relevant directors or managers in the security and IT departments as well as from any other cross-functional departments that may be impacted.

Final decision

If the company has a chief information security officer (CISO), that individual will likely make the decision. If not, companies must trust their security professionals’ ability to use and understand the product. 

What Does Security Information and Event Management (SIEM) Software Cost?

If the buyer chooses a cloud-based SIEM tool that offers pricing on the SaaS, pay-as-you-use model, potential growth should be considered. Some solutions are inexpensive at the start and offer affordable low-tier pricing. Alternatively, some may rapidly increase pricing and fees as the company and storage needs to scale. Some vendors offer permanently free backup products for individuals or small teams.

Cloud SIEM: SIEM as a service pricing may vary, but will traditionally scale as the storage increases. Other additional costs may come for increased features such as automated remediation, security orchestration, and integrated threat intelligence. 

On premises SIEM: On-premises solutions are typically more expensive and require more effort and resources to implement. They will also be more expensive to maintain and require dedicated staff. Still, companies with high compliance requirements should adopt on-premises security regardless. 

Return on Investment (ROI)

Similar to its lower-average cost, cloud-based SIEM solutions will also provide a quicker ROI. It’s pretty cut and dry since there is a much lower initial investment and lower demand for dedicated staffing. 

However, for on-premises systems, the ROI will depend on the scale and scope of business IT systems. Hundreds of servers will require hundreds of sensors, potentially more as time takes its toll on computing equipment. Once implemented, they will need to be operated and maintained by (expensive) security professionals.