Cisco IOS Security vs OPNsense comparison

Cisco and OPNsense are both solutions in the Firewalls category. Cisco is ranked #24 with an average rating of 8.5, while OPNsense is ranked #3 with an average rating of 7.9. Cisco holds a 0.3% mindshare in Firewalls, compared to OPNsense’s 11.0% mindshare. Additionally, 91% of Cisco users are willing to recommend the solution, compared to 95% of OPNsense users who would recommend it.

Comparison Buyer's Guide

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Executive SummaryUpdated on Sep 16, 2024

Cisco IOS Security and OPNsense compete in network security solutions. OPNsense seems to have an upper hand due to its comprehensive features and customization capabilities.

Features: Cisco IOS Security offers advanced threat protection, scalability, and robust support. OPNsense provides user-friendly configuration options, a rich plugin ecosystem, and significant customization capabilities.

Room for Improvement: Cisco IOS Security can improve its intuitive management tools, faster update cycles, and more flexible licensing options. OPNsense needs better documentation, enhanced multi-WAN support, and improved error handling.

Ease of Deployment and Customer Service: Cisco IOS Security offers straightforward deployment and excellent customer service. OPNsense is easy to set up but has mixed support quality, making Cisco IOS Security favored for reliable service.

Pricing and ROI: Cisco IOS Security tends to have higher setup costs, delivering good ROI due to reliability and support. OPNsense has lower initial costs and satisfactory ROI, appealing to budget-conscious users, thus more cost-effective.

To learn more, read our detailed Cisco IOS Security vs. OPNsense Report (Updated: September 2025).

Buyer's Guide

Cisco IOS Security vs. OPNsense

September 2025

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Helped 869,785 peers since 2012

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

5.9

Fortinet FortiGate offers strong security, cost efficiency, and easy integration, saving organizations up to 30% on data costs.

Sentiment score

7.4

Cisco IOS Security delivered significant ROI through improved routing, security, stability, and cost-efficiency, despite competitive vendor pressures.

Sentiment score

3.8

OPNsense offers quick ROI, annual savings, improved network protection, efficiency, but faces challenges like market disruptions and cyber threats.

Clients are now comfortable and not wasting productive hours on IT support.

MURALI NIDAMANURI

Managing Director at a manufacturing company with 10,001+ employees

The automation part is giving us a cost benefit and speed; we can react faster.

Bart Homblé

BDM Fortinet & BDM Teamlead at Exclusive Networks

It's a very useful tool to mitigate and protect your enterprise.

Bernard Samontanes

Staff Infrastructure & Security Engineer at Mozn Systems

For more quotes and insights, download the Fortinet FortiGate report

The return on investment is satisfactory with Cisco products as they have long lifespans, and our customers are satisfied with them.

Danijel Cerovecki

Head of Cyber Defense Department and Network Technologies Department at Verso Altima

For more quotes and insights, download the Cisco IOS Security report

The network attacks reduced by approximately 60% after using that, even without customizing the custom configuration yet.

Mahmoud Suleiman

Senior IT Infrastructure Engineer at a real estate/law firm with 11-50 employees

For a very little investment, I was able to increase the security of my network.

Richard Chamberlain

Administrator at a retailer with 10,001+ employees

For more quotes and insights, download the OPNsense report

Customer Service

Sentiment score

6.6

Fortinet FortiGate support is generally effective, but some users report delays and issues with complex problem resolution and communication.

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

4.9

Users often solve issues using online resources, valuing community help, but suggest OPNsense centralize and improve support options.

They offer very accurate solutions.

Taimoor Khan

Network Operations Engineer at Inara Technologies

The quick resolution of issues with Fortinet FortiGate is due to the support of the company and the fact that the equipment is easy to work with.

Alexandre Menezes

IT Manager at a consultancy with 10,001+ employees

I would rate the technical support for Fortinet FortiGate a ten out of ten.

AnishKumar

NAC Support at Rah Infotech Pvt Ltd

For more quotes and insights, download the Fortinet FortiGate report

My impression is that the support quality has deteriorated over time.

Danijel Cerovecki

Head of Cyber Defense Department and Network Technologies Department at Verso Altima

For more quotes and insights, download the Cisco IOS Security report

Compared to some open-source projects with weak support, OPNsense stands out for having both a strong community and commercial backing options.

Moutaz Sheikh Alard

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

I mainly rely on community support since the solution is open source.

Stephen Zoran

Senior Client Solutions Architect at a tech services company with 1,001-5,000 employees

If you say you do not have one, it is finished. This is where the monopoly starts.

Harry Fusser

Senior Solutions Engineer at a educational organization with 201-500 employees

For more quotes and insights, download the OPNsense report

Scalability Issues

Sentiment score

7.1

Fortinet FortiGate efficiently scales for SMEs, though hardware upgrades can be challenging, with virtual deployments offering flexibility.

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

6.6

OPNsense is scalable and adaptable, supporting small to large deployments with flexibility in hardware upgrades and virtual machines.

They scale up really well from smaller models like the FortiGate 40 and 50 to bigger sites with the FortiGate 100 for more throughput - up to enterprise datacenters.

Ian Manton

IT Manager at Daltons Limited

The variation comes in terms of the interfaces and throughputs, but from a security perspective, you get the same benefit, irrespective of whether you have an entry-level unit or an enterprise.

reviewer2667480

Cewa Solutions Architect at a tech services company with 11-50 employees

We determine sizing based on multiple factors: number of users, available links, traffic types, server count, services in use, and whether services will be published.

FatmaSamy

General Surgery Specialist at Helwan University Cairo

For more quotes and insights, download the Fortinet FortiGate report

No quotes available

For more quotes and insights, download the Cisco IOS Security report

Aside from these aspects, it demonstrated good scalability.

Akram Zaki Hussein

System and Network Administrator at El Sadat City Language School

It supports routing, VPN setups, and traffic monitoring with additional packages like Snort and Suricata.

PeterMuiruri

IT Manager at Pride in Azure

OPNsense is an extremely scalable solution.

Chirosca Alecsandru

Owner at Networks srl

For more quotes and insights, download the OPNsense report

Stability Issues

Sentiment score

7.7

Fortinet FortiGate is praised for its dependable stability, minimal downtime, and robust performance, especially with regular firmware updates.

Sentiment score

7.6

Cisco IOS Security is generally reliable with occasional issues, frequently updated for stability, scoring 7-10 in satisfaction.

Sentiment score

7.5

OPNsense is highly stable and reliable, excelling in security and usability, but occasionally faces VPN and update issues.

We're experiencing 99.999% availability consistently.

Ricardo Biggs

Manager, Information Technology at a consumer goods company with 11-50 employees

I would rate the stability of Fortinet FortiGate a ten out of ten.

AnishKumar

NAC Support at Rah Infotech Pvt Ltd

Currently, we are experiencing a general outage of one of the main internet service providers of the Dominican Republic, and we have not been impacted in our operations because with SD-WAN, we have another internet service provider and we are working with the second WAN connection without any disruption.

Juan Frias

CISO at a financial services firm with 1,001-5,000 employees

For more quotes and insights, download the Fortinet FortiGate report

We find Cisco products stable and thoroughly tested before new software or firmware versions are released.

Danijel Cerovecki

Head of Cyber Defense Department and Network Technologies Department at Verso Altima

I find Cisco IOS Security to be a very stable product.

Binoob John

Partner/Owner and Director of Human Resources at Up arrow Systems

For more quotes and insights, download the Cisco IOS Security report

For home and small network use, OPNsense is also reliable, providing enterprise-grade security at no cost.

Moutaz Sheikh Alard

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

OPNsense is the same, but it does have a way of installing the Realtek drivers, which gives you a lot more stability overall on the system.

RicardoDias

Network and Programming Specialist at Twentytwo Integration

The only challenge faced was its inadequacy to manage large voice traffic effectively, even with dedicated hardware.

reviewer1027455

Senior Network Engineer at a comms service provider with 11-50 employees

For more quotes and insights, download the OPNsense report

Room For Improvement

Users seek improvements in FortiGate's performance, web interface, reporting, documentation, licensing, and training resources.

Cisco IOS Security struggles with integration, usability, cost, lacking features, complex licensing, performance, and requires enhancement and support.

OPNsense's challenges include interface usability, integration issues, and the need for improved VPN, analytics, and virtualization support.

Investing in a solution that can accommodate such growth would be more cost-effective than repeatedly purchasing new hardware.

Jose Gisbert

Manager Network (IT/OT) at a consumer goods company with 5,001-10,000 employees

While Fortinet claims to offer a comprehensive network solution, it falls short in addressing computer application issues, particularly server security.

MOHAN SUKUMAR

Head of computer systems at Indian Institute of Space Science & Technology(IIST)

When considering Sophos XG, which we also use, the logging and reporting functionality is notably more efficient.

Taha Turkestani

Senior IT specialist at SAUDIA ALIRLINES

For more quotes and insights, download the Fortinet FortiGate report

Cisco changes their licensing policy quite frequently, which is becoming confusing and complicated.

Danijel Cerovecki

Head of Cyber Defense Department and Network Technologies Department at Verso Altima

For more quotes and insights, download the Cisco IOS Security report

For high availability, it's crucial to have a method in place where a designated component oversees the entire process.

Akram Zaki Hussein

System and Network Administrator at El Sadat City Language School

Improved guidance on package usage and integration beyond relying on external tutorials or community support would be beneficial.

PeterMuiruri

IT Manager at Pride in Azure

I would like the APIs to be more mature and more developed and have more options to automate threat hunting.

Chirosca Alecsandru

Owner at Networks srl

For more quotes and insights, download the OPNsense report

Setup Cost

Fortinet FortiGate offers robust features at a competitive price but can be costly, especially with licenses; long-term pricing negotiation advised.

Cisco IOS Security is costly, favoring medium to large enterprises with longer-term savings over SMB challenges.

OPNsense is a cost-effective, open-source firewall solution offering affordability compared to commercial firewalls, appealing to enterprises.

Last year, I renewed the support for three years, which can sometimes be expensive but depends on the security benefits and how it helps us.

AiméKouchade

Network & System Admin at Invoke Studios

It offers cost savings as it is generally cheaper than the competition.

NilsPaley

IT Infrastructure Architect at Apotek 1

It is about 20% cheaper.

MithatBulut

Network Security Engineer at TD SYNNEX

For more quotes and insights, download the Fortinet FortiGate report

The cost of Cisco IOS Security for customers is on the higher end of pricing compared to the competition, depending on the targeted customers.

Danijel Cerovecki

Head of Cyber Defense Department and Network Technologies Department at Verso Altima

For more quotes and insights, download the Cisco IOS Security report

It is a free solution, and when you compare it to alternatives like FortiGate, which is quite powerful but also costly, the value becomes evident.

Akram Zaki Hussein

System and Network Administrator at El Sadat City Language School

I would rate the pricing a nine out of ten, especially considering the availability of a free community edition.

PeterMuiruri

IT Manager at Pride in Azure

It is free.

Samo Primožič

Technical support engineer at ADVANT računalniški inženiring, komunikacije, svetovanje in distribucija d.o.o.

For more quotes and insights, download the OPNsense report

Valuable Features

Fortinet FortiGate provides robust security, seamless integration, user-friendly interface, and cost-effective advanced threat management for diverse network environments.

Cisco IOS Security offers scalable, stable solutions with VPN, AAA, firewall integration, and user-friendly management for high-demand environments.

OPNsense is user-friendly and cost-effective, offering extensive VPN, firewall features, and easy scalability with strong community support.

In terms of security, we have not experienced any security flaws or loopholes, and it has proven to be quite stable.

MOHAN SUKUMAR

Head of computer systems at Indian Institute of Space Science & Technology(IIST)

FortiGate has helped reduce the risk of cyberattacks that might disrupt our client's production.

Taimoor Khan

Network Operations Engineer at Inara Technologies

These features help reduce our downtime, manage the ISPs, and deploy SLAs for all the website traffic.

Syed Ali Waqas

Head IT at Burraq Cyber Security Solutions

For more quotes and insights, download the Fortinet FortiGate report

This solution, called Network Access Controller, handles authentication, authorization, and accounting for devices accessing the network.

Binoob John

Partner/Owner and Director of Human Resources at Up arrow Systems

The best features of Cisco IOS Security are its integration with software management tools such as Cisco DNA Center and Cisco ICE, which provide centralized policy and network access control.

Danijel Cerovecki

Head of Cyber Defense Department and Network Technologies Department at Verso Altima

For more quotes and insights, download the Cisco IOS Security report

The most valuable features include the basic firewall functionality and the GeoIP location services.

reviewer1027455

Senior Network Engineer at a comms service provider with 11-50 employees

I can have a Wi-Fi VLAN and feel secure that the server network or the VM network that I have on a different VLAN are isolated, and they cannot talk to one another, which adds a great level of security.

Richard Chamberlain

Administrator at a retailer with 10,001+ employees

It offers enterprise-grade features such as intrusion detection and prevention system, VPN support, traffic shaping, and web filtering, all without license cost.

Moutaz Sheikh Alard

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

For more quotes and insights, download the OPNsense report

Categories and Ranking

Fortinet FortiGate

Mindshare comparison

As of October 2025, in the Firewalls category, the mindshare of Fortinet FortiGate is 20.4%, up from 19.1% compared to the previous year. The mindshare of Cisco IOS Security is 0.3%, up from 0.2% compared to the previous year. The mindshare of OPNsense is 11.0%, down from 15.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Firewalls Market Share Distribution
Product	Market Share (%)
Fortinet FortiGate	20.4%
OPNsense	11.0%
Cisco IOS Security	0.3%
Other	68.3%

Firewalls

Featured Reviews

Vasu Gala

Manager, Information Technology Operation/Presales at TechMonarch

A stable solution with an intuitive interface and quick customer service

I have been working with Fortinet FortiGate, WatchGuard, Sophos, and SonicWall. I'm not as comfortable with SonicWall because of their UI and limitations. I prefer Fortinet above all other options. When it comes to configuration, I am confident in my ability to handle various tasks, including creating policies such as firewall rules, web policies, and application policies. Additionally, I can configure VPNs and implement load balancing, among other tasks. Overall, I feel much more comfortable working with Fortinet. Fortinet has made significant improvements by integrating AI with firewalls for threat analysis and prevention. In the past 2-3 years, they have launched FortiSASE and SIEM, and they also provide SOC services. Both Palo Alto and Fortinet FortiGate are excellent. While Fortinet FortiGate comes at higher prices, the functionality and support justify the cost. They promptly resolve firmware issues and inform all support providers about configuration changes.

Read full review

Danijel Cerovecki

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.

Read full review

Moutaz Sheikh Alard

ISO 27001 Lead Implementer at a consultancy with 11-50 employees

Has helped simulate enterprise security setups and strengthens network segmentation practices

For my capstone, I use OPNsense for my project and its broader benefits for enterprise and cybersecurity context. OPNsense is an open source based firewall and routing platform. It offers enterprise-grade features such as intrusion detection and prevention system, VPN support, traffic shaping, and web filtering, all without license cost. This platform has a modular design, a clean web-based GUI, and frequent updates that prioritize security and usability. It competes with commercial firewalls such as Cisco ASA, FortiGate, and Palo Alto, but stands out because it's community-driven, cost-effective, and transparent. I find OPNsense's feature of acting as a central firewall and gateway most valuable, providing robust point segmentation between the internal network and DMZs in my capstone project, intrusion detection to monitor malicious traffic, VPN services for secure remote access, and logging and monitoring for compliance and auditing. This allows me to simulate a real-world enterprise environment on a smaller scale, demonstrating both security hardening and network efficiency. OPNsense impacts my projects and home network positively because its cost-effectiveness is perfect for lab and enterprise setup without expensive licensing. The flexibility, easy VLAN and DMZ configuration supports different zones such as web servers, mail servers, and log servers. The security-first design for IDS/IPS integration helps me showcase modern defense-in-depth strategies. The user-friendly management through the web GUI makes it possible to manage complex firewall rules clearly, which is critical when documenting and presenting a capstone. Scalability is also an advantage. Although my project is lab-based, OPNsense can scale into production deployments in SMBs and enterprise.

Read full review

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Top Industries

By visitors reading reviews

Computer Software Company

15%

Comms Service Provider

Manufacturing Company

Financial Services Firm

Computer Software Company

27%

Government

Manufacturing Company

Outsourcing Company

Computer Software Company

16%

Comms Service Provider

16%

University

Educational Organization

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	350
Midsize Enterprise	130
Large Enterprise	187

By reviewers
Company Size	Count
Small Business	19
Midsize Enterprise	14
Large Enterprise	18

By reviewers
Company Size	Count
Small Business	30
Midsize Enterprise	5
Large Enterprise	8

Questions from the Community

Which is the better NGFW: Fortinet Fortigate or Cisco Firepower?

When you compare these firewalls you can identify them with different features, advantages, practices and usage a...

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What is the biggest difference between Sophos XG and FortiGate?

From my experience regarding both the Sophos and FortiGate firewalls, I personally would rather use FortiGate. I know...

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What are the biggest technical differences between Sophos UTM and Fortinet FortiGate?

As a solution, Sophos UTM offers a lot of functionality, it scales well, and the stability and performance are quite ...

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What do you like most about Cisco IOS Security?

Cisco IOS Security is a mature product with extensive capabilities, serving as the base for the defense layer. It off...

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What is your experience regarding pricing and costs for Cisco IOS Security?

Pricing can be reduced. I rate the current price for the product a four out of ten.

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What needs improvement with Cisco IOS Security?

While I do not have specific recommendations for improvement, pricing can be reduced.

See all answers

What is the difference between PfSense and OPNsense?

Two of the most common and well recognized firewalls, PfSense and OPNsense both support site-to-site IPsec VPN and cl...

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What do you like most about OPNsense?

What I like the most about OPNsense is that it offers an easy-to-use dashboard for device management and control.

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What is your experience regarding pricing and costs for OPNsense?

My experience with pricing, setup cost, and licensing is that since OPNsense is free, the licensing and setup was eas...

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Comparisons

Sophos XG vs Fortinet FortiGate

Compared 18% of the time

Cisco Secure Firewall vs Fortinet FortiGate

Compared 11% of the time

Netgate pfSense vs Fortinet FortiGate

Compared 9% of the time

Cisco Meraki MX vs Fortinet FortiGate

Compared 4% of the time

WatchGuard Firebox vs Fortinet FortiGate

Compared 4% of the time

More Fortinet FortiGate Competitors

Cisco Secure Firewall vs Cisco IOS Security

Compared 21% of the time

Cisco Meraki MX vs Cisco IOS Security

Compared 12% of the time

Fortinet FortiOS vs Cisco IOS Security

Compared 6% of the time

ExtraHop Reveal(x) vs Cisco IOS Security

Compared 6% of the time

Palo Alto Networks NG Firewalls vs Cisco IOS Security

Compared 6% of the time

More Cisco IOS Security Competitors

Netgate pfSense vs OPNsense

Compared 38% of the time

IPFire vs OPNsense

Compared 14% of the time

Sophos XG vs OPNsense

Compared 8% of the time

Untangle NG Firewall vs OPNsense

Compared 3% of the time

Sophos XGS vs OPNsense

Compared 3% of the time

More OPNsense Competitors

Product Reports

Buyer's Guide

Fortinet FortiGate

October 2025

Download Fortinet FortiGate product report

Buyer's Guide

Cisco IOS Security

October 2025

Download Cisco IOS Security product report

Buyer's Guide

OPNsense

September 2025

Download OPNsense product report

Also Known As

No data available

IOS Security

No data available

Overview

Fortinet FortiGate excels in providing integrated VPN, firewalling, and Unified Threat Management (UTM) with centralized management and high availability. It supports remote access and comprehensive threat protection, making it a preferred choice for securing networks.

Fortinet FortiGate offers a robust security platform with features such as strong intrusion prevention, application control, and web filtering. Its integration with Active Directory and SD-WAN functionality provides scalable solutions for large networks. Users appreciate its ease of use through centralized management interfaces, ensuring robust security with flexible configurations. However, FortiGate could enhance its graphical interface and technical support responsiveness, address firmware bugs and costly licensing, improve logging, integrate better with third-party tools, and strengthen scalability and memory for log storage. Complexity in configuration and the need for intuitive features are noted challenges, and there's a demand for advanced security, zero-trust capabilities, and AI integration.

What are the key features of Fortinet FortiGate?

VPN: Secure remote access and connectivity.
Firewalling: Protects networks from unauthorized access and attacks.
UTM: Offers a comprehensive approach to threat management.
SD-WAN: Optimizes traffic routing for efficient network performance.
Web Filtering: Controls and monitors web access and ensures Internet security.

What benefits or ROI should be considered?

Centralized Management: Simplifies administration and monitoring.
High Availability: Ensures consistent security and network availability.
Scalability: Adapts to the needs of growing networks.
Comprehensive Threat Protection: Provides robust security measures.
Ease of Use: Minimizes the complexity of security management.

Fortinet FortiGate is widely implemented across industries like education, finance, and government. Companies use it for firewall protection, VPN, and SD-WAN capabilities, ensuring secure perimeter and data center security. It facilitates remote access management and traffic routing optimization, offering reliable security and connectivity solutions.

Fortinet

Cisco IOS Software delivers a sophisticated set of security capabilities for a comprehensive, layered security approach throughout your network infrastructure. Cisco IOS security technologies help to defend critical business processes against attack and disruption, protect privacy, and support policy and regulatory compliance controls.

Cisco

OPNsense is an adaptable open-source firewall and routing platform appreciated for its flexibility, scalability, and user-friendly interface. It is equipped with robust security features and offers excellent reporting and visibility, essential for small businesses and home setups.

OPNsense stands out for its modular design, allowing cost-effective customization. This system supports VPNs and various firewall capabilities, making it suitable for securing networks from malicious traffic. Its frequent updates and extensive documentation, combined with a supportive online community, enhance user experience. However, there is room for improvement in integration with virtual servers and Azure. Scalability and hardware updates are important for large-scale environments, and users desire more reliable VPN solutions and enhanced threat intelligence tools.

What are OPNsense's most important features?

Flexibility: Easily customizable due to its open-source nature.
Robust Security: Advanced security features for network protection.
User-Friendly Interface: Simplified management and configuration.
Frequent Updates: Regular improvements and new features.
Dense Documentation: Extensive resources and community support.

What benefits should users look for in reviews?

Cost-Effectiveness: Open-source design reduces costs.
Scalability: Ability to grow with business needs.
Customizability: Tailored solutions for different requirements.
Community Support: Access to a strong network of resources and peers.

OPNsense is implemented in industries requiring VPN and firewall functions, supporting site-to-site connections, protecting servers, and managing commercial network traffic. Companies apply it for security, UTM, SD-WAN, content filtering, intrusion detection, and prevention, utilizing its open-source nature and effectiveness as a next-generation firewall.

OPNsense

Sample Customers

Amazon Web Services, Microsoft, IBM, Cisco, Dell, HP, Oracle, Verizon, AT&T, T-Mobile, Sprint, Vodafone, Orange, BT Group, Telstra, Deutsche Telekom, Comcast, Time Warner Cable, CenturyLink, NTT Communications, Tata Communications, SoftBank, China Mobile, Singtel, Telus, Rogers Communications, Bell Canada, Telkom Indonesia, Telkom South Africa, Telmex, Telia Company, Telkom Kenya

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

1. Deciso B.V. 2. iXsystems, Inc. 3. EuroBSDCon 4. Netgate 5. Claranet 6. Voleatech 7. Open Systems AG 8. Securebit AG 9. Proxmox Server Solutions GmbH 10. AVM Computersysteme Vertriebs GmbH Additional customers include: T-Systems International GmbH, Deutsche Telekom AG, Vodafone GmbH, 1&1 IONOS SE, OVHcloud, Hetzner Online GmbH, Strato AG, PlusServer GmbH, Host Europe GmbH, United Internet AG, 1&1 Versatel Deutschland GmbH, QSC AG, Bechtle AG, Cancom SE, Computacenter AG & Co. oHG, T-Systems Multimedia Solutions GmbH, Atos SE, Capgemini SE, Accenture plc, IBM Corporation, Hewlett Packard Enterprise Company, Cisco Systems, Inc.

Buyer's Guide

Cisco IOS Security vs. OPNsense

September 2025

Free Report: Cisco IOS Security vs. OPNsense

Find out what your peers are saying about Cisco IOS Security vs. OPNsense and other solutions. Updated: September 2025.

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