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Cisco IOS Security vs Corelight Open NDR comparison

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Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

ROI

Sentiment score
7.4
Cisco IOS Security delivered significant ROI through improved routing, security, stability, and cost-efficiency, despite competitive vendor pressures.
Sentiment score
7.0
Corelight Open NDR provides cost-effective, enhanced visibility and ROI through strategic pricing, on-premises hosting, and competitive partnerships.
The return on investment is satisfactory with Cisco products as they have long lifespans, and our customers are satisfied with them.
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
Corelight Investigator is sold as a software as a service license, and sensors are of course a one-time fee with their hardware maintenance.
Growth And Strategy Lead at a computer software company with 51-200 employees
I believe I have seen a return on my investment with Corelight Open NDR.
Principle Security Architect at Eversource Energy
 

Customer Service

Sentiment score
6.7
Cisco IOS Security support is generally praised for speed and skill, though some report delays and complexity in access.
Sentiment score
7.1
Corelight Open NDR's customer service is praised for responsiveness and expertise, despite occasional reports of poor service quality.
My impression is that the support quality has deteriorated over time.
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
I bring in hundreds of subnet variable definitions via an automated import process, enabling me to leverage all those variables in my Suricata alerts.
Principle Security Architect at Eversource Energy
I would probably say we are at an eight or nine as far as the quality of support, which I think is very reasonable.
Growth And Strategy Lead at a computer software company with 51-200 employees
 

Scalability Issues

Sentiment score
7.4
Cisco IOS Security offers scalable, enterprise-level solutions but may increase costs and limit universality due to required hardware.
Sentiment score
7.2
Corelight Open NDR offers scalable, flexible sensor solutions for diverse businesses, simplifying network traffic management and expansion, especially in Kubernetes.
With Investigator itself, Corelight Open NDR is very easy to scale and manage as a business changes.
Growth And Strategy Lead at a computer software company with 51-200 employees
 

Stability Issues

Sentiment score
7.6
Cisco IOS Security is generally reliable with occasional issues, frequently updated for stability, scoring 7-10 in satisfaction.
Sentiment score
8.4
Corelight Open NDR offers reliability and stability, leveraging Zeek technology and effective fleet management for consistent performance.
We find Cisco products stable and thoroughly tested before new software or firmware versions are released.
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
I find Cisco IOS Security to be a very stable product.
Partner/Owner and Director of Human Resources at Up arrow Systems
I cannot think of any time we have had a serious disruption to anything we have been doing due to some technical issue on their side.
Growth And Strategy Lead at a computer software company with 51-200 employees
Corelight Open NDR has been very stable as a solution.
Principle Security Architect at Eversource Energy
 

Room For Improvement

Cisco IOS Security struggles with integration, usability, cost, lacking features, complex licensing, performance, and requires enhancement and support.
Corelight Open NDR users desire an interactive interface, better customer support, simplified querying, enhanced documentation, and more transparent pricing.
Cisco changes their licensing policy quite frequently, which is becoming confusing and complicated.
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
I believe what they have done with it, taking an open-source engine and bundling it into an appliance with professional support, was a brilliant idea.
Principle Security Architect at Eversource Energy
Corelight has done a really good job of making sure that everything is explainable and everything is mapped when it comes to leveraging any of their artificial intelligence features.
Growth And Strategy Lead at a computer software company with 51-200 employees
 

Setup Cost

Cisco IOS Security is costly, favoring medium to large enterprises with longer-term savings over SMB challenges.
Corelight Open NDR's pricing is mixed, with affordable options for experts but costly for new adopters, despite communication issues.
The cost of Cisco IOS Security for customers is on the higher end of pricing compared to the competition, depending on the targeted customers.
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
Corelight Investigator is sold as a software as a service license, and sensors are of course a one-time fee with their hardware maintenance.
Growth And Strategy Lead at a computer software company with 51-200 employees
 

Valuable Features

Cisco IOS Security offers scalable, stable solutions with VPN, AAA, firewall integration, and user-friendly management for high-demand environments.
Corelight Open NDR provides cost-effective, efficient network threat detection and management with machine learning to reduce alert fatigue.
There are higher-level systems such as intrusion prevention systems which detect intrusions within the system.
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
This solution, called Network Access Controller, handles authentication, authorization, and accounting for devices accessing the network.
Partner/Owner and Director of Human Resources at Up arrow Systems
The benefits include visibility, as the Suricata engine can scan huge volumes of traffic.
Principle Security Architect at Eversource Energy
Corelight Open NDR is a really powerful platform. Pairing up the sensors with Investigator, you are getting incredibly rich data, which we are also able to further enrich with additional feeds such as CrowdStrike or CISAIAS.
Growth And Strategy Lead at a computer software company with 51-200 employees
 

Categories and Ranking

Cisco IOS Security
Ranking in Intrusion Detection and Prevention Software (IDPS)
17th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
49
Ranking in other categories
Firewalls (38th)
Corelight Open NDR
Ranking in Intrusion Detection and Prevention Software (IDPS)
19th
Average Rating
8.8
Reviews Sentiment
7.2
Number of Reviews
7
Ranking in other categories
Network Traffic Analysis (NTA) (4th), Network Detection and Response (NDR) (6th), AI-Powered Cybersecurity Platforms (12th)
 

Mindshare comparison

As of November 2026, in the Intrusion Detection and Prevention Software (IDPS) category, the mindshare of Cisco IOS Security is 2.2%, up from 1.5% compared to the previous year. The mindshare of Corelight Open NDR is 1.3%, down from 2.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Intrusion Detection and Prevention Software (IDPS) Mindshare Distribution
ProductMindshare (%)
Cisco IOS Security2.2%
Corelight Open NDR1.3%
Other96.5%
Intrusion Detection and Prevention Software (IDPS)
 

Featured Reviews

Danijel Cerovecki - PeerSpot reviewer
Head of Cyber Defense Department and Network Technologies Department at Verso Altima
Have faced challenges in keeping licensing clear and consistent while ensuring reliable network protection
We are a Gold Partner with Cisco. Our customers come from various industries, including service providers, and we target service providers and enterprise customers.We do not extensively use Zone-Based Firewalls in Cisco IOS Security, instead typically deploying standalone firewalls such as Cisco FTDs or Cisco ASA devices. For threat analytics and vulnerability scanning, we utilize third-party vendors with dedicated devices and software. We use products such as Tenable from Nessus for this type of analysis. We have implemented Secure Access Control Server in Cisco IOS Security, which combines multiple security mechanisms including AAA, 802.1X for network access control with Cisco ICE, TrustSec for identity-based segmentation, and Cisco DNA Center. Cisco IOS Security's VPN support is comprehensive and increasingly important in daily communication, from basic site-to-site tunnels to remote access VPNs and SD-WAN secure VPNs. Protecting and encrypting communication is essential in modern networks. The challenges with Cisco IOS Security are more operational than product-related. There is an understaffing issue, making automation and orchestration capabilities particularly valuable. For the products themselves, we only encounter routine operational matters such as addressing new vulnerabilities and patching. For those considering Cisco IOS Security, it is important to understand that Cisco offers a complete ecosystem. When embracing the Cisco ecosystem fully, customers receive excellent products and comprehensive solutions. On a scale of 1-10, I rate Cisco IOS Security a 9.
reviewer2834367 - PeerSpot reviewer
Growth And Strategy Lead at a computer software company with 51-200 employees
Network visibility has transformed how we detect nation state threats and protect critical industry
Before Corelight recently started pushing some of the agentic features, querying at times could be a little difficult, depending on your mastery of log scale. However, I think with a lot of the artificial intelligence that they are building in, it is getting a lot easier to query in the platform. I would definitely encourage them to continue down that path where anybody can hop into the platform and start running queries, whether it is a simple instruction like I want this, and an artificial intelligence process can actually build the query and do it. I think that would be super powerful. Cyber skill sets are in high demand, and there is a huge backlog in cyber talent. We cannot fill all the positions we need. The easier we can make these cyber systems for people to pick up and be effective on, I think is really key. Explainability of data is hyper important. In the past few artificial intelligence related updates we have gotten from Corelight, that has been one of the first questions our team has asked every time or that I have asked: show me what the model is doing, show me how it came to this analysis. Within Investigator platform, they are able to walk through and see exactly what data the artificial intelligence pulled from where and why it did what it did as far as making its suggestions. They have definitely built their system with artificial intelligence in mind up front, and having that openness as one of the key features of any of their artificial intelligence and machine learning processes in the platform is important. The issue with black boxes is obviously hallucinations from artificial intelligence and just not being able to trace to ground truth. When we are talking about these cyber incidents and being able to do forensics, you need to be able to pinpoint and tie everything together, and black boxes really obscure that and prevent you from doing so. Corelight has done a really good job of making sure that everything is explainable and everything is mapped when it comes to leveraging any of their artificial intelligence features.
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Top Industries

By visitors reading reviews
Construction Company
16%
Outsourcing Company
14%
Financial Services Firm
9%
Manufacturing Company
8%
Financial Services Firm
11%
Government
8%
Real Estate/Law Firm
8%
Computer Software Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise14
Large Enterprise18
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise3
Large Enterprise3
 

Questions from the Community

What is your experience regarding pricing and costs for Cisco IOS Security?
The cost of Cisco IOS Security for customers is on the higher end of pricing compared to the competition, depending on the targeted customers.This can be a major issue as enterprise customers are o...
What needs improvement with Cisco IOS Security?
Regarding improvements in Cisco IOS Security, what consistently confuses me is the inability of Cisco to maintain a clear licensing policy.This is an issue that I have observed for years now. Cisco...
What is your primary use case for Cisco IOS Security?
The main use cases for Cisco IOS Security include elementary device hardening, access control, control-plane policing, AAA (Authentication, Authorization, and Accounting), network security, Layer 2...
What is your experience regarding pricing and costs for Corelight?
I have a fortunate experience with pricing, setup costs, and licensing of Corelight Open NDR, as being a principal architect, I get to sit outside of that conversation and just choose the best prod...
What needs improvement with Corelight?
Corelight Open NDR does not need any improvements or additional features in the next releases. The product is excellent at what it does, and I believe what they have done with it, taking an open-so...
What is your primary use case for Corelight?
I have been using Corelight Open NDR solution for approximately three years. I leverage the Suricata engine heavily for alerting on indicators of compromise as my main use case for this solution.
 

Also Known As

IOS Security
Corelight Open NDR
 

Overview

 

Sample Customers

Arup Group, Brunel University London, City of Biel, Gobierno de Castilla-La Mancha, K&L Gates , New South Wales Rural Fire Service, Offshore Northern Seas, Transplace
CarrefourEdnonGrand Canyon EducationSektorCERTTietoevryVolkswagen Financial Services
Find out what your peers are saying about Cisco IOS Security vs. Corelight Open NDR and other solutions. Updated: November 2026.
921,523 professionals have used our research since 2012.