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AlienVault OSSIM vs Splunk Enterprise Security comparison

AT&T and Splunk are both solutions in the Security Information and Event Management (SIEM) category. AT&T is ranked #12 with an average rating of 7.4, while Splunk is ranked #1 with an average rating of 8.3. AT&T holds a 2.8% mindshare in SIEM, compared to Splunk’s 9.3% mindshare. Additionally, 80% of AT&T users are willing to recommend the solution, compared to 94% of Splunk users who would recommend it.
AlienVault OSSIM
Read 31 AlienVault OSSIM reviews
  • 4,916 Views
  • 4,818 Comparison Views
80% willing to recommend
Splunk Enterprise Security
Read 366 Splunk Enterprise Security reviews
  • 24,756 Views
  • 12,873 Comparison Views
94% willing to recommend
 

Comparison Buyer's Guide

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Executive SummaryUpdated on Jul 13, 2025

Splunk Enterprise Security and AlienVault OSSIM are both strong contenders in the enterprise security market. Splunk appears to have an advantage due to its comprehensive security features and robust support, while AlienVault offers a cost-effective option with essential functionalities.

Features:Splunk Enterprise Security provides capabilities for analyzing log data, threat detection, and advanced query options along with customizable dashboards. Other benefits include rapid and versatile data management, effective real-time alerts, and excellent search processing language support. AlienVault OSSIM offers free data correlation, vulnerability assessments, and easy integration with various security tools, making it ideal for smaller organizations.

Room for Improvement:Splunk could enhance cost-effectiveness and automate features to reduce manual input. More intuitive features, multi-cloud support, and affordable training are also areas to improve. AlienVault could benefit from better third-party integrations, a decrease in false positives, and improved stability.

Ease of Deployment and Customer Service:Splunk supports on-premises, hybrid, and comprehensive cloud solutions, providing responsive support. AlienVault offers affordable on-premises and hybrid deployment options with strong community support, making it suitable for users who prioritize simplicity.

Pricing and ROI:Splunk's advanced features come at a higher cost, suitable for large enterprises with substantial resources but may be prohibitive for smaller organizations. AlienVault OSSIM, being open-source, offers flexible pricing advantages, appealing to small-to-mid-sized businesses looking for effective solutions without significant financial investment.

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To learn more, read our detailed AlienVault OSSIM vs. Splunk Enterprise Security Report (Updated: September 2025).
Buyer's Guide
AlienVault OSSIM vs. Splunk Enterprise Security
September 2025
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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

AlienVault OSSIM
Ranking in Security Information and Event Management (SIEM)
12th
Average Rating
7.4
Reviews Sentiment
7.1
Number of Reviews
31
Ranking in other categories
No ranking in other categories
Splunk Enterprise Security
Ranking in Security Information and Event Management (SIEM)
1st
Average Rating
8.4
Reviews Sentiment
7.4
Number of Reviews
366
Ranking in other categories
Log Management (2nd), IT Operations Analytics (1st)
 

Mindshare comparison

As of September 2025, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 2.8%, down from 4.4% compared to the previous year. The mindshare of Splunk Enterprise Security is 9.3%, down from 11.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Market Share Distribution
ProductMarket Share (%)
Splunk Enterprise Security9.3%
AlienVault OSSIM2.8%
Other87.9%
Security Information and Event Management (SIEM)
 

Featured Reviews

HarshBhardiya - PeerSpot reviewer
An open-source solution that provide good detection and more visibility
The solution is not scalable. It impacts so hard. In the initial stages, AlienVault OSSIM can be suitable for small environments. There may be limitations if the customer expresses a desire to expand and add more devices. In such cases, we would need to either explore additional solutions or work within the constraints of the existing setup. We have set up alerts and configured everything in AlienVault OSSIM. It actively monitors for any security incidents. It provides us with regular updates and notifications about any ongoing activities. Only one person is using the solution. It is the perfect solution for small businesses. I rate the solution’s scalability a three out of ten.
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Kyle Vernham - PeerSpot reviewer
Built-in searches and unified data access streamline alert investigation and boosts analyst efficiency
The two features I appreciate the most in Splunk Enterprise Security are the built-in searches, which have been very easy for us to get started with right out of the box, and the fact that it accesses all of our other systems. You can access it as a pane of glass rather than having to search individually. We also have the option to compare our analysts from our service to service. Splunk Enterprise Security helps our SOC team prioritize and investigate high-fidelity alerts more effectively by providing a more in-depth look and the ability to access a lot more of our data. Instead of jumping from several segmented systems, it allows us to have everything brought together in one place. For example, you have to move from our purview to our build system and to Splunk Enterprise Security, and it enables us to streamline that process. The built-in features of Splunk Enterprise Security, which we recently procured, have given us a good starting point and demonstrated the value of the product, providing an easy way to sell it to our company. The ease of getting everything into our purview helps us, and it serves as a good start for the investigation part in one location rather than what we usually have, which is jumping from system to system to system. Splunk Enterprise Security plays a role in our company's strategy to combat insider threats and advanced persistent threats by currently being in its technical test phase. We are still rolling it out, and it should help us find any insider threats based on information that our policy states should not be present in our system. Splunk Enterprise Security's risk-based alerting (RBA) has impacted our alert volume and analyst productivity because we've got many different systems feeding into it. However, it has helped to make it easier for our analysts to go through a set of events rather than 100 alerts. RBA allows us to streamline the process and customize it for our analysts. When it comes to leveraging Splunk Enterprise Security's dashboards and visualizations to communicate security posture to executives, it's pretty straightforward for any type of information. The visualization is easy to understand, but I haven't had any direct conversations with our executives.
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Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"Better than other SIEM solutions because almost everything can be integrated."
"The product is easy to use."
"Network traffic analysis is highly efficient."
"You can customize the dashboards as well as the reporting."
"The open vault component and the checking of vulnerabilities are the most valuable features. The page management helps with this. If you know how your device is vulnerable at least you can do something about it."
"Its user-friendliness is the most valuable. It is very easy to use and explore. The dashboard is very well packaged and integrated. You don't have to spend a lot of time in configuring it and checking out the RPM etc. It is also free and very powerful."
"You pay monthly for the solution. I think it's one of the best products. If you compare with other companies, like LogRhythm, etc., the top 8 or 10 CMs, I think Alien Vault has the best price-performance ratio."
"With AlienVault you get everything in one box."
More AlienVault OSSIM pros
"The biggest advantage I can see in Splunk Enterprise Security is the big data analytics."
"The solution's most valuable feature is the criticality of alerts."
"We have a one stop dashboard for health of some of our services where you can click in and it takes you to other dashboards that have custom near real-time metrics that show the application's health."
"Now with Splunk Enterprise Security, we have everything in one place—the notables are created automatically, but they can also create their own notables based on the investigation, which improved and reduced about 50% of the manual work that was done before versus what we are doing now."
"Splunk is user-friendly. We can easily customize the monitoring script."
"I like the search feature and the indexing. It's very fast and comprehensive."
"Integrity with many vendors: This simplifies the implementation and integration with different devices"
"The solution has made us more secure."
More Splunk Enterprise Security pros
 

Cons

"The solution needs more integration with cyber intelligence systems."
"The correlation engine needs to be improved."
"The initial setup was a bit complex. You've got to do a lot of reading. It's not an intuitive implementation."
"It's under heavy traffic. If you have heavy traffic, the system is slow."
"AlienVault OSSIM on-premise version is more difficult to implement than the cloud version. Additionally, they should add integration between several different environments at once and improve their online knowledge base."
"The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"They can add more compliance templates."
More AlienVault OSSIM cons
"Splunk could enhance its offerings by incorporating modules for network detection and response and fraud management, along with improving its threat intelligence management capabilities."
"It needs integration with a configuration management solution."
"This is not really a monitoring solution."
"Cybersecurity and infrastructure monitoring have room for improvement."
"The access and identity features could be improved. For example, let's say we have onboarded 65 logs. Now, we can identify the various processes, but we run into trouble when we're updating the processes for AWS CloudTrail, EDR, MDR, and XDR."
"While Splunk Enterprise Security offers valuable features, its cost is high and could be more competitive."
"Free-floating panels in the dashboards are like a glass table."
"I find the process for customizing, developing, testing, deploying, and refining detections in Splunk Enterprise Security to be cumbersome."
More Splunk Enterprise Security cons
 

Pricing and Cost Advice

"The price of AlienVault OSSIM is too high sometimes for us to present to our customers. The price should be lower. We are on a three-year license to use the solution. We had to pay extra for the support."
"We are using the community version, which can be used for free."
"When comparing AlienVault OSSIM to Microsoft Sentinel, AlienVault OSSIM incurs additional costs due to its licensing price structure. If you are using AlienVault for security purposes at a certain level it can have a higher price point than the current pricing of Microsoft Sentinel."
"I used the paid version of the tool and found it to be expensive. It has been a while since I changed to Securonix. I will have to check whether AlienVault charges per device, user, or log."
"We are using a free version of the solution. If you purchase a license there are more features available but the price is a little high. The solution should be cheaper to allow more customers to be able to afford it."
"OSSIM is open source, and USM is the paid license. So, if you want, you can switch to USM. There you will have to buy a license, and they have a support team that helps you out on issues you face."
"The tool's licensing costs are yearly."
"AlienVault OSSIM is an open-source solution."
More AlienVault OSSIM pricing and cost advice
"The price of Splunk Enterprise Security is high."
"I believe that Splunk Enterprise Security is worth the price, but it is expensive."
"The pricing is a little bit on the higher side, but looking at what Splunk provides us, it is reasonable."
"Pricing and licensing are quite high compared to other tools or SIEM tools, but the features justify it."
"I've heard Splunk is often preferred over other options, but the cost can be prohibitive for smaller organizations."
"I have no opinion on pricing."
"It is expensive. That is why many customers have moved to IBM QRadar. The price is definitely a challenge for customers."
"The pricing model is based on the number of gigabytes that you ingest into the Splunk system. So it can be an expensive solution."
More Splunk Enterprise Security pricing and cost advice
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Comparison Review

VS
Feb 26, 2015
HP ArcSight vs. IBM QRadar vs. ​McAfee Nitro vs. Splunk vs. RSA Security vs. LogRhythm
We at Infosecnirvana.com have done several posts on SIEM. After the Dummies Guide on SIEM, we are following it up with a SIEM Product Comparison – 101 deck. So, here it is for your viewing pleasure. Let me know what you think by posting your comments below. The key products compared here are…
Read full review
 

Top Industries

By visitors reading reviews
Computer Software Company
14%
Comms Service Provider
12%
University
8%
Educational Organization
8%
Computer Software Company
14%
Financial Services Firm
13%
Manufacturing Company
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business18
Midsize Enterprise9
Large Enterprise8
By reviewers
Company SizeCount
Small Business109
Midsize Enterprise49
Large Enterprise255
 

Questions from the Community

What do you like most about AlienVault OSSIM?
Asset discovery is good.
See all answers
What is your experience regarding pricing and costs for AlienVault OSSIM?
It depends. I would need to review their cost models, but generally, they are on a scaled basis based on throughput usage. Because it's a software as a service solution for their core product for U...
See all answers
What needs improvement with AlienVault OSSIM?
Scaling for USM is always challenging for any product unless it is purpose-built or overbuilt at the front end. They will use Palo Alto and its competitors, and LevelBlue will manage that implement...
See all answers
What SOC product do you recommend?
For tools I’d recommend: -SIEM- LogRhythm -SOAR- Palo Alto XSOAR Doing commercial w/o both (or at least an XDR) is asking to miss details that are critical, and ending up a statistic. Also, rememb...
See all answers
What is a better choice, Splunk or Azure Sentinel?
It would really depend on (1) which logs you need to ingest and (2) what are your use cases Splunk is easy for ingestion of anything, but the charge per GB/Day Indexed and it gets expensive as log ...
See all answers
How does Splunk compare with Azure Monitor?
Splunk handles a high amount of data very well. We use Splunk to capture information and as an aggregator for monitoring information from different sources. Splunk is very good at alerting us if we...
See all answers
 

Comparisons

Wazuh vs AlienVault OSSIM Logo
Wazuh vs AlienVault OSSIM
Compared 71% of the time
USM Anywhere vs AlienVault OSSIM Logo
USM Anywhere vs AlienVault OSSIM
Compared 6% of the time
Venusense USM vs AlienVault OSSIM Logo
Venusense USM vs AlienVault OSSIM
Compared 5% of the time
Elastic Security vs AlienVault OSSIM Logo
Elastic Security vs AlienVault OSSIM
Compared 4% of the time
Rapid7 InsightIDR vs AlienVault OSSIM Logo
Rapid7 InsightIDR vs AlienVault OSSIM
Compared 2% of the time
More AlienVault OSSIM Competitors
IBM Security QRadar vs Splunk Enterprise Security Logo
IBM Security QRadar vs Splunk Enterprise Security
Compared 8% of the time
Dynatrace vs Splunk Enterprise Security Logo
Dynatrace vs Splunk Enterprise Security
Compared 7% of the time
Wazuh vs Splunk Enterprise Security Logo
Wazuh vs Splunk Enterprise Security
Compared 7% of the time
Datadog vs Splunk Enterprise Security Logo
Datadog vs Splunk Enterprise Security
Compared 5% of the time
Security Onion vs Splunk Enterprise Security Logo
Security Onion vs Splunk Enterprise Security
Compared 4% of the time
More Splunk Enterprise Security Competitors
 

Product Reports

Buyer's Guide
AlienVault OSSIM
September 2025
AlienVault OSSIM reportDownload AlienVault OSSIM product report
Buyer's Guide
Splunk Enterprise Security
August 2025
Splunk Enterprise Security reportDownload Splunk Enterprise Security product report
 

Also Known As

OSSIM
No data available
 

Overview

AlienVault OSSIM, Open Source Security Information and Event Management (SIEM), provides you with a feature-rich open source SIEM complete with event collection, normalization and correlation. Launched by security engineers because of the lack of available open source products, AlienVault OSSIM was created specifically to address the reality many security professionals face: A SIEM, whether it is open source or commercial, is virtually useless without the basic security controls necessary for security visibility.

AT&T

Splunk Enterprise Security delivers powerful log management, rapid searches, and intuitive dashboards, enhancing real-time analytics and security measures. Its advanced machine learning and wide system compatibility streamline threat detection and incident response across diverse IT environments.

Splunk Enterprise Security stands out in security operations with robust features like comprehensive threat intelligence and seamless data integration. Its real-time analytics and customizable queries enable proactive threat analysis and efficient incident response. Integration with multiple third-party feeds allows detailed threat correlation and streamlined data visualization. Users find the intuitive UI and broad compatibility support efficient threat detection while reducing false positives. Despite its strengths, areas such as visualization capabilities and integration processes with cloud environments need enhancement. Users face a high learning curve, and improvements in automation, AI, documentation, and training are desired to maximize its potential.

What Are the Key Features of Splunk Enterprise Security?
  • Log Management: Efficiently manages and organizes a vast amount of logs for better data handling.
  • Rapid Data Search: Quickly retrieves relevant data for fast decision-making.
  • Flexible Dashboards: Customizable dashboards provide clear data visualization.
  • Comprehensive Threat Intelligence: Offers detailed insights to preemptively defend against threats.
  • Real-Time Analytics: Analyzes data in real-time to enhance response times.
  • Integration with Third-Party Feeds: Streamlines information flow from multiple sources.
What Benefits Should Users Investigate in Reviews?
  • Efficient Incident Response: Enhances the ability to respond promptly to threats.
  • False Positive Reduction: Minimizes incorrect threat alarms, making monitoring more efficient.
  • Threat Detection Speed: Accelerates the identification and evaluation of security threats.
  • Cost-Effectiveness: Potential savings through better licensing options and operational efficiency.
  • User Adaptability: Enhancements in documentation and training resources aid in overcoming the learning curve.

In specific industries like finance and healthcare, Splunk Enterprise Security is instrumental for log aggregation, SIEM functionalities, and compliance monitoring. Companies leverage its capabilities for proactive threat analysis and response, ensuring comprehensive security monitoring and integration with various tools for heightened operational intelligence.

Splunk
 

Sample Customers

Council Rock School District
Splunk has more than 7,000 customers spread across over 90 countries. These customers include Telenor, UniCredit, ideeli, McKenney's, Tesco, and SurveyMonkey.
Buyer's Guide
AlienVault OSSIM vs. Splunk Enterprise Security
September 2025
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