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Cisco Identity Services Engine (ISE) vs Fortinet FortiAuthenticator comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 20, 2025

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
8.4
Cisco Identity Services Engine enhances security and efficiency, providing cost savings and IT consolidation, making it vital for network management.
Sentiment score
5.9
Fortinet FortiAuthenticator enhances security and compliance, offering quick ROI through two-factor authentication, reducing breaches and compliance costs.
Direct comparisons with Forescout reveal up to 30% to 40% difference in cost savings.
It enhances security by ensuring only the right person can access systems, even if their login credentials are compromised.
 

Customer Service

Sentiment score
5.9
Cisco Identity Services Engine customer service is praised for commitment, but technical support feedback varies due to delays and complexities.
Sentiment score
7.1
Fortinet FortiAuthenticator's support is responsive and knowledgeable, but complex issues may face initial delays.
I rate the technical support as one out of ten.
Sometimes it's challenging to identify which support team is responsible for certain issues, which is a significant concern.
Customer service and support are excellent.
At times, some technical staff lack knowledge, which delays issue resolution.
When we send a ticket to Fortinet, they go into research mode as if they are hearing the problem for the first time.
 

Scalability Issues

Sentiment score
7.3
Cisco ISE excels in scalable environments, efficiently supporting deployments with flexibility for thousands of endpoints across various sizes.
Sentiment score
7.7
Fortinet FortiAuthenticator excels in scalability for medium to large enterprises, with adaptable licenses and both virtual and physical options.
Factors like architecture, business nature, and legal limitations such as GDPR affect it.
The scalability of FortiAuthenticator is good, and I would rate it an eight on a scale of one to ten.
I find Fortinet FortiAuthenticator to be highly scalable, and I would rate it an eight out of ten for scalability.
 

Stability Issues

Sentiment score
7.7
Cisco ISE is reliable with high user satisfaction, though some report stability issues, especially during upgrades and high capacity.
Sentiment score
7.6
Fortinet FortiAuthenticator is praised for stability, but larger user bases may face reliability issues, affecting performance and authentication.
The stability of Cisco Identity Services Engine (ISE) is poor for certain use cases, like authentication.
Cisco Identity Services Engine (ISE) is considered very reliable and stable.
It remains stable even when the number of concurrent users increases.
 

Room For Improvement

Cisco ISE struggles with setup complexity, non-intuitive UI, integration challenges, upgrade issues, and demands for better features.
Fortinet FortiAuthenticator needs interface updates, better documentation, improved integration, scalability, automation, and support with attention to pricing.
The whole setup works well with Cisco access points and Cisco switches, but when you have multiple vendors in the environment, such as HP switches or access points like Aruba, you'll find they will not work well with Cisco Identity Services Engine (ISE).
Pricing can be more expensive compared to other vendors, and there is a significant price gap observed, which doesn't seem justified by some specific features.
Additionally, the product is vulnerable and has many bugs.
For example, authentication for wireless users expires after 24 hours, requiring re-authentication daily.
I recommend Fortinet make its images migratable between environments.
The technical support could be improved as some staff lacks the necessary knowledge to assist effectively.
 

Setup Cost

Cisco ISE offers strong features with complex, expensive pricing, but discounts through partnerships can help alleviate costs.
Fortinet FortiAuthenticator offers flexible, competitive licensing with optional costs, balancing features and market conditions effectively for affordability.
Compared to other solutions like HPE ClearPass, Cisco is more costly, and the conversation suggests a possible forty percent price gap compared to competitors.
The license costs can range between $50,000 to $100,000 per year for enterprises.
The cost is about 100 million Ugandan shillings, which converts to approximately $30,000 per year.
Fortinet FortiAuthenticator is not overly expensive compared to other Fortinet subscriptions.
 

Valuable Features

Cisco ISE provides comprehensive access control, seamless integration, and enhanced security with intuitive management for versatile network operations.
Fortinet FortiAuthenticator enhances security and efficiency with two-factor authentication, SSO integration, user management, and cost-effective robust protocols.
There is value because it helps us secure the network and prevents certain things from happening which could cause financial loss.
This solution ensures organizations have secure environments and also supports robust policy enforcement, allowing control over who has access to various parts of the network.
Cisco Identity Services Engine (ISE) is very good at device administration.
The integration with FortiToken is outstanding, adding a layer of security for authentication.
We use multi-factor authentication for enhancing security.
The most valuable feature I find in FortiAuthenticator is web filtering.
 

Categories and Ranking

Cisco Identity Services Eng...
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
143
Ranking in other categories
Network Access Control (NAC) (1st), Cisco Security Portfolio (1st)
Fortinet FortiAuthenticator
Average Rating
8.0
Reviews Sentiment
6.9
Number of Reviews
60
Ranking in other categories
Single Sign-On (SSO) (6th), Authentication Systems (3rd), Identity Management (IM) (9th), Multi-Factor Authentication (MFA) (1st)
 

Mindshare comparison

Cisco Identity Services Engine (ISE) and Fortinet FortiAuthenticator aren’t in the same category and serve different purposes. Cisco Identity Services Engine (ISE) is designed for Network Access Control (NAC) and holds a mindshare of 25.1%, down 30.7% compared to last year.
Fortinet FortiAuthenticator, on the other hand, focuses on Single Sign-On (SSO), holds 7.0% mindshare, down 7.8% since last year.
Network Access Control (NAC)
Single Sign-On (SSO)
 

Featured Reviews

SunilkumarNaganuri - PeerSpot reviewer
Enhanced device administration hindered by complex deployment and security limitations
Cisco Identity Services Engine (ISE) needs to improve the profiling preauthentication. They are very poor in asset classification and should focus on improving the preauthentication profiling, especially for NAC use cases. This will give them a roadmap for software-defined access (SDA) use cases and network segmentation. Threat detection capabilities are very weak. Additionally, the product is vulnerable and has many bugs.
Yonas Abebe - PeerSpot reviewer
Integration capabilities simplify authentication and migration challenges need addressing
The integration capabilities of Fortinet FortiAuthenticator are very interesting, as it can be integrated with third-party devices easily and is straightforward to configure. The integration with FortiToken is outstanding, adding a layer of security for authentication. In addition, it can be used by integrating with zero trust single access, enhancing overall security measures.
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Educational Organization
15%
Financial Services Firm
9%
Government
8%
Computer Software Company
16%
Comms Service Provider
9%
Financial Services Firm
8%
Government
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

Which is better - Aruba Clearpass or Cisco ISE?
Aruba ClearPass is a Network Access Control tool that gives secure network access to multiple device types. You can adapt the policies to VPN access, wired, or wireless access. You can securely ...
What are the main differences between Cisco ISE and Forescout Platform?
OK, so Cisco ISE uses 802.1X to secure switchports against unauthorized access. The drawback of this is that ISE cannot secure the port if a device does not support 802.1x. Cameras, badge readers, ...
How does Cisco ISE compare with Fortinet FortiNAC?
Cisco ISE uses AI endpoint analytics to identify new devices based on their behavior. It will also notify you if someone plugs in with a device that is not allowed and will block it. The user exper...
What is your experience regarding pricing and costs for Fortinet FortiAuthenticator?
Fortinet FortiAuthenticator is not overly expensive compared to other Fortinet subscriptions. However, it would be beneficial if the licensing allowed for more flexibility to cover additional users.
What needs improvement with Fortinet FortiAuthenticator?
Initially, we deployed Fortinet FortiAuthenticator on VMware and faced challenges when migrating to an OpenStack environment, which required reconfiguration. I recommend Fortinet make its images mi...
 

Also Known As

Cisco ISE
FortiAuthenticator
 

Overview

 

Sample Customers

Aegean Motorway, BC Hydro, Beachbody, Bucks County Intermediate Unit , Cisco IT, Derby City Council, Global Banking Customer, Gobierno de Castilla-La Mancha, Houston Methodist, Linz AG, London Hydro, Ministry of Foreign Affairs, Molina Healthcare, MST Systems, New South Wales Rural Fire Service, Reykjavik University, Wildau University
Black Gold Regional Schools, Amadeus Hospitality, Jefferson County, Chunghwa Telecom, City of Boroondara, Dimension Data
Find out what your peers are saying about Cisco, Hewlett Packard Enterprise, Fortinet and others in Network Access Control (NAC). Updated: June 2025.
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