Hillstone T-Series vs OPNsense comparison

Hillstone Networks and OPNsense are both solutions in the Firewalls category. Hillstone Networks is ranked #41, while OPNsense is ranked #5 with an average rating of 8.1. Hillstone Networks holds a 0.5% mindshare in Firewalls, compared to OPNsense’s 8.5% mindshare. Additionally, 66% of Hillstone Networks users are willing to recommend the solution, compared to 95% of OPNsense users who would recommend it.

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Executive SummaryUpdated on Sep 16, 2024

Hillstone T-Series and OPNsense are two notable products in the network security sector. Users indicate that OPNsense outperforms Hillstone T-Series in terms of features and overall satisfaction despite Hillstone T-Series being preferred for support and pricing.

Features: Hillstone T-Series is valued for its robust security capabilities, strong performance metrics, and competitive pricing structure. OPNsense is highly regarded for its extensive customization options, comprehensive feature set, and reliable community support.

Room for Improvement: Hillstone T-Series users suggest enhancements in its integration with third-party tools, more frequent updates, and improved customer service responsiveness. OPNsense users recommend improving its documentation, simplifying certain functionalities, and addressing deployment complexity.

Ease of Deployment and Customer Service: Hillstone T-Series offers a straightforward deployment process but mixed reviews on customer service. OPNsense has a more complex deployment but reliable community support and detailed resources.

Pricing and ROI: Hillstone T-Series is praised for its competitive pricing and reasonable ROI. OPNsense is considered pricier but worth the investment due to its feature set and flexibility.

To learn more, read our detailed Hillstone T-Series vs. OPNsense Report (Updated: June 2026).

Buyer's Guide

Hillstone T-Series vs. OPNsense

June 2026

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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

Fortinet FortiGate

Mindshare comparison

As of June 2026, in the Firewalls category, the mindshare of Fortinet FortiGate is 15.1%, down from 21.7% compared to the previous year. The mindshare of Hillstone T-Series is 0.5%, up from 0.1% compared to the previous year. The mindshare of OPNsense is 8.5%, down from 10.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Firewalls Mindshare Distribution
Product	Mindshare (%)
Fortinet FortiGate	15.1%
OPNsense	8.5%
Hillstone T-Series	0.5%
Other	75.9%

Firewalls

Featured Reviews

Joseph Koomson

IP Network Security Specialist at MTN Ghana

Process-Level CPU Visibility: Introduce detailed CPU-usage metrics per subsystem (e.g., IPS engine, logging) so administrators can quickly identify and address performance spikes.

Analytics with FortiAnalyzer. Being able to pull in logs not just from our FortiGates but from all our other firewalls and then get them in one view has been a game changer. Whether I’m building an executive dashboard or doing a deep dive forensics session, I get everything I need without navigating consoles.Straightforward Application Control. FortiGate spots and blocks unwanted apps (eq. like BitTorrent or streaming services) with accuracy. Segmentation with VDOMs. We’ve carved our data center into four logical ‘mini-firewalls’ enterprise, core, billing, and WAF—all on one box. Each has its own rules and logs, and any traffic between them still gets inspected. It’s like having multiple appliances without the extra hardware. Always-Up-to-Date Threat Feeds. Daily signature updates and AI-driven threat sensing mean we’re blocking the latest vulnerabilities almost as soon as they’re announced.

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TahirMahmood

IT Manager at Zubair Feeds

Is stable and has a user-friendly dashboard and a good interface

We installed Hillstone T-Series after a ransomware attack. The dashboard and user interface are very good We cannot secure a specific IP class with this firewall. Another loophole with Hillstone T-Series is that when we connect through WiFi and turn our hot spot on, all who connect through the…

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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.

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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

"Our project needs to link two sides through the internet. One of these was in Cairo and the other in another city. We used FortiGate as the integrating solution between the two locations, i.e. the Fortinet 30E & 100E."

"I think that the UTM features are the most value, as it truly protects my infrastructure."

"Onboarded three times more customers without adding firewall hardware, cut network expansion capital expenses by roughly 40 percent through VDOM consolidation, reduced vulnerability remediation costs by about 60 percent thanks to automated FortiGuard updates, shortened policy-deployment time by over 50 percent, freeing up 10 plus hours of engineering effort weekly, and achieved payback on the initial FortiGate investment within 9 months via increased tenancy revenue and lower OPEX."

"The product offers very good security."

"This solution has solid UTM features combined with a nice GUI."

"FortiGate is easy to configure. We configured one of the units and sent it to Indiana to be installed. We asked them to give us a call when they got it, so we could help them through the process, but they called us back to tell us it works great."

"Fortinet FortiGate is easy to use."

"Finally there is a UTM Fortinet. It has given me complete oversight of my network in a centralized fashion, so I know what is going on at all times."

More Fortinet FortiGate pros

"It has been stable so far."

"We found some limitations with Fortinet FortiGate, and we are satisfied with Hillstone T-Series right now."

"We installed Hillstone T-Series after a ransomware attack. The dashboard and user interface are very good."

"The only firewall able to monitor traffic from a CCTV network. Can detect unauthorized devices plugged into the network, which standard firewalls can't do."

"Hillstone supports IOT setup and detecting intrusions from IOT or CCTV connectivity, and with this solution, we can also detect unauthorized devices plugged into the CCTV network and sound the alarm to the administrator."

"We can open a new VPN connection easily. It's much easier than with Fortinet in our experience."

"One of the most valuable features is the network checking. Additionally, the firewall and web filtering functionalities are highly useful."

"The most valuable feature is the Dual WAN in OPNSense, which offers advanced capabilities."

"OPNsense is easy to scale when running on the hardware."

"For the initial setup of OPNsense, I find that it is very simple."

"OPNsense impacts my projects and home network positively because its cost-effectiveness is perfect for lab and enterprise setup without expensive licensing, and the flexibility, easy VLAN and DMZ configuration supports different zones such as web servers, mail servers, and log servers."

"The solution is very user-friendly, easy to manage and deploy, and is good for a basic firewall for a small business or for home use."

"The feature I find most valuable, is that the program helped me to realize all the requested functionality that was needed."

More OPNsense pros

Cons

"It claims it does DLP, but the degree and level of controls are very basic."

"The support is very poor with FortiGate IPS and they need to look into fixing it. The senior support agent does not honor their commitments when ordering products."

"The stability of Fortinet FortiGate could improve."

"The interface could be better."

"The scalability of the device is limited."

"Lacks sufficient security options."

"They should consider making some improvements regarding the pricing."

"I found that the memory usage for the Fortigate firewall are relatively higher than other firewall brand when compared to same traffic volume."

More Fortinet FortiGate cons

"Another loophole with Hillstone T-Series is that when we connect through WiFi and turn our hot spot on, all who connect through the hotspot get all the functions, and the security does not work."

"They have a very good technical support team, but I think there are some communication issues due to language differences."

"Licensing is not cheap, but there are customers who will buy because they understand that this has a cost involved and they will cater their budget for that."

"Licensing is not cheap."

"The only thing that I would like to see improved is the Insight or the NetFlow analysis part. It would be good to have the possibility to dig down on the Insight platform. Right now, we can easily do only a few analyses. If this page becomes more powerful, it surely will be a well-adopted platform."

"The reporting part could be better."

"OPNsense could improve by making the configuration more web-based rather than shell or command-line-based."

"SD-WAN (software-defined wide area network) is integrated into some restricted service providers for OPNSense."

"Pricing in my opinion is just too expensive. It makes no sense. It moves in the direction of a monopoly."

"The ability to set the VPN IP address would be a welcome addition."

"You will need additional training before you can actually start to use it."

"OPNsense struggles to handle large volumes of voice traffic, indicating scalability issues in that specific use case."

More OPNsense cons

Pricing and Cost Advice

"Fortinet bundles FortiGate with other products and because of this, the price is a little expensive to some SMB enterprises."

"It is cost-effective, and provides a good value for your money. The pricing, and license renewal, is very reasonable for us."

"Work through partners for the best pricing."

"FortiGate SWG is a cost-effective solution well-suited for organisations of all sizes."

"In my opinion, the pricing of the product is reasonable."

"There is a subscription-based model to use Fortinet FortiGate. We pay annually for the solution along with the support. If you want to have all the updates, and security patches you will need to renew your support."

"I rate FortiGate Next Generation Firewall a five out of ten for pricing."

"Fortinet has one or two license types, and the VPN numbers are only limited by the hardware chassis make."

More Fortinet FortiGate pricing and cost advice

"We got a much cheaper price than that provided by Fortinet right now."

"On a scale from one to ten, with one being low and ten being high price, I would rate the price of Hillstone T-Series at three. There are no additional costs other than renewal costs."

"Its pricing is unbeatable in comparison to other firewalls. You can have a small instance that could be €80 a month with the hardware underneath. Azure Firewall and FortiGate are out of the question at this price. If you are on a public cloud, you need the underlying infrastructure. Other than that, there is no additional cost. If you have it on-prem, you have to buy the server or the appliance. The hardware cost is replaced with the infrastructure cost in the cloud. You also have costs for the public IPs and underlying VMs, but that's not related to OPNsense. It would be the same for a FortiGate deployment on Azure. You need a FortiGate license, and you need the underlying infrastructure that scales up depending on your needs."

"I'm using the free version of OPNsense. I didn't check the pricing for the solution because I still need to test it before getting the approval to purchase OPNsense, and it isn't easy to get approval from the higher-ups."

"OPNsense is an open-source solution and it is free to use."

"The price of OPNsense is good."

"OPNsense is a well known open-source tool."

"It's not expensive."

"As an appliance, it's in the medium price range."

"It is free."

More OPNsense pricing and cost advice

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Top Industries

By visitors reading reviews

Comms Service Provider

10%

Computer Software Company

Manufacturing Company

Financial Services Firm

Construction Company

15%

Manufacturing Company

12%

Real Estate/Law Firm

10%

Comms Service Provider

10%

Comms Service Provider

17%

Computer Software Company

Manufacturing Company

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	369
Midsize Enterprise	139
Large Enterprise	195

No data available

By reviewers
Company Size	Count
Small Business	32
Midsize Enterprise	6
Large Enterprise	8

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Setup cost is almost zero as one can simulate the whole environment using open source version. Pricing seems fair eno...

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What needs improvement with OPNsense?

When I talk about VPN, I am not completely satisfied with the VPN functions of OPNsense. What I have received so far ...

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Comparisons

Sophos Firewall vs Fortinet FortiGate

Compared 16% of the time

Cisco Secure Firewall vs Fortinet FortiGate

Compared 13% of the time

Palo Alto Networks NG Firewalls vs Fortinet FortiGate

Compared 5% of the time

Netgate pfSense vs Fortinet FortiGate

Compared 3% of the time

Cisco Meraki MX vs Fortinet FortiGate

Compared 2% of the time

More Fortinet FortiGate Competitors

Cisco Secure Firewall vs Hillstone T-Series

Compared 22% of the time

Check Point Cloud Firewall (formerly CloudGuard Network Security) vs Hillstone T-Series

Compared 15% of the time

Cisco Meraki MX vs Hillstone T-Series

Compared 12% of the time

Sophos Firewall vs Hillstone T-Series

Compared 7% of the time

Sangfor NGAF vs Hillstone T-Series

Compared 5% of the time

More Hillstone T-Series Competitors

Netgate pfSense vs OPNsense

Compared 52% of the time

IPFire vs OPNsense

Compared 6% of the time

Sophos Firewall vs OPNsense

Compared 5% of the time

Sophos UTM vs OPNsense

Compared 3% of the time

Cisco Secure Firewall vs OPNsense

Compared 3% of the time

More OPNsense Competitors

Product Reports

Buyer's Guide

Fortinet FortiGate

June 2026

Download Fortinet FortiGate product report

Buyer's Guide

Firewalls

May 2026

Download Hillstone T-Series product report

Buyer's Guide

OPNsense

June 2026

Download OPNsense product report

Also Known As

Fortinet FortiGate Next-Generation Firewall

Hillstone T-Series Intelligent Next-Generation Firewalls, Hillstone iNGFW

No data available

Overview

Fortinet FortiGate is a versatile network security tool offering features like VPN, firewall, web filtering, intrusion prevention, and scalability. It is known for its performance and integration with other Fortinet products, making it a preferred choice for robust cybersecurity.

Fortinet FortiGate stands out as a comprehensive cybersecurity solution with strong performance and ease of configuration. It delivers unified threat management, integrating features such as dynamic routing, SD-WAN support, and centralized management. Despite its strengths, improvements in the web interface's stability, pricing structures, and reporting capabilities are needed. Users seek better integration with third-party tools and automation advancements to enhance the experience further. These enhancements, alongside improvements in bandwidth management and the reduction of licensing costs, are points of interest for users looking to capitalize on FortiGate's extensive capabilities.

What are Fortinet FortiGate's key features?

VPN: Ensures secure remote connections.
Firewall: Protects against unauthorized access.
Web Filtering: Blocks malicious sites and content.
Application Control: Manages and controls applications.
Intrusion Prevention: Detects and prevents vulnerabilities.
SSL Inspection: Enhances security by inspecting encrypted traffic.

What benefits should be considered when evaluating Fortinet FortiGate?

Affordability: Offers cost-effective security solutions.
Reliability: Known for consistent and stable performance.
Integration: Seamlessly integrates with other Fortinet products.
Comprehensive Protection: Provides broad threat protection capabilities.

Fortinet FortiGate is widely implemented across industries as a primary firewall system for securing internet gateways and safeguarding data centers. It supports businesses in achieving SD-WAN integration and enhances cybersecurity by providing essential features like antivirus, web filtering, and application control. Enterprises utilize FortiGate for securing remote connections and ensuring compliance with security standards, making it adaptable for different network sizes and industries.

Fortinet

Hillstone T-Series offers a robust solution for high-performance network security, ideal for enterprises requiring reliable, scalable protection against advanced threats.

Designed for dynamic environments, Hillstone T-Series provides comprehensive insight and control across networks, safeguarding data and optimizing resource allocation. Its advanced threat prevention capabilities ensure that enterprises are equipped to handle evolving cybersecurity challenges. Built to integrate seamlessly, it enhances both operational efficiency and security posture.

What are the key features of Hillstone T-Series?

Advanced Threat Detection: Identifies and mitigates complex threats in real-time for enhanced network security.
Scalable Architecture: Easily adapts to growing network demands, ensuring long-term reliability.
Comprehensive Policy Management: Simplifies administration with intuitive controls for efficient policy enforcement.
High Performance: Delivers exceptional throughput and low latency, supporting demanding network environments.

What benefits should users consider when evaluating Hillstone T-Series?

Improved Security Posture: Strengthens defense mechanisms to mitigate risks effectively.
Resource Optimization: Allocates network resources effectively, enhancing operational productivity.
Cost Efficiency: Reduces expenses by streamlining security management processes.
Scalability: Ensures future-proofing with adaptable infrastructure to meet growing demands.

In finance, Hillstone T-Series efficiently handles high-volume transactions, ensuring secure and lightning-fast processing. Healthcare institutions benefit from its robust data protection, maintaining patient confidentiality while facilitating seamless information exchange. In manufacturing, it effectively manages and secures industrial control systems, promoting operational integrity.

Hillstone Networks

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

University of Córdoba

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

Hillstone T-Series vs. OPNsense

June 2026

Free Report: Hillstone T-Series vs. OPNsense

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