7 Best Small Business Firewall Options

A firewall usually gets attention for one of two reasons: after a cyber incident, or when the broadband keeps dropping and everyone blames the internet. For most firms, neither is a good time to choose. The best small business firewall options are the ones that fit how your team actually works, protect the business without slowing it down, and can be managed properly month after month.

For a small or mid-sized business, that last point matters more than many vendors admit. A firewall is not just a box that sits in the comms cabinet. It is part of your wider security, connectivity and business continuity plan. If it is badly sized, poorly configured or left untouched after installation, even a well-known brand can become an expensive weak spot.

What the best small business firewall options need to do

A business firewall should do far more than basic traffic filtering. Most organisations now need secure remote access, website filtering, protection against known malicious traffic, reporting, and enough performance headroom to cope with cloud services, Teams calls, VoIP and hybrid working.

That does not mean every business needs the most advanced enterprise appliance on the market. A ten-person accountancy practice in Corby has different requirements from a multi-site manufacturer in the Midlands. One may care most about secure remote working and Cyber Essentials readiness. The other may need site-to-site VPNs, network segmentation and resilience across several locations.

The right choice usually comes down to five practical questions. How many users do you have? How much internet traffic do you generate? Do you need to support remote workers and multiple sites? Do you have internal IT expertise to manage it properly? And how important are compliance, reporting and audit visibility in your sector?

Best small business firewall options by type of business need

Rather than chasing a single “best” device, it is more useful to look at the options that consistently suit small businesses in the UK.

SonicWall

SonicWall remains a familiar name in the SME market and can be a sensible option for businesses wanting a capable firewall without moving too far into enterprise complexity. It covers the core needs many smaller organisations have, including VPN, content filtering and gateway security features.

Whether it is the right fit comes down to management and support. A competent setup can serve a business well. A rushed deployment with poor policy design can create frustration for users and extra risk for the company. That is true of every vendor, but SonicWall deployments often show the difference between a product choice and a properly planned solution.

Nubis 365 Ltd are well versed in setting up an configuring Sonicwall firewalls and have a number of units including failover mechanisms in place throughout the UK.

Fortinet FortiGate

FortiGate is often chosen where performance matters. If your business has heavier traffic, multiple services running across the network, or plans to grow quickly, Fortinet is worth serious consideration. It is well regarded for throughput and broader network security capability.

This can be a very good option for companies with more complex requirements, but it is not always the simplest route for a smaller office with limited in-house IT. In the right hands it is powerful and cost-effective. In the wrong hands it can be over-specified, under-managed and harder for non-specialists to get the best from.

Nubis 365 has many years of experience with Fortinet solutions and have found them to be tricky to set up but very solid for security.

Cisco Meraki MX

Meraki is popular with organisations that value cloud management and ease of administration. If you have distributed sites, limited internal IT resource and want visibility without constantly being on site, it can be an attractive model.

The dashboard is one of the main selling points. It is easy to understand and generally straightforward to work with. That said, Meraki’s licensing model is not for everyone. Some businesses like the simplicity. Others dislike the dependency on ongoing subscription costs and prefer a platform with a different commercial structure.

Nubis 365 manages Cisco routing and find them particularly robust when dealing with multiple sites especially in the construction industry. As with all firewalls it is imperative that the default admin password is changed on installation.

DrayTek for smaller offices

For very small businesses, branch offices or cost-sensitive environments, DrayTek can make sense. It is often used where reliable connectivity, VPN and basic firewall capability are the main requirements. In a small professional office with modest needs, it may be enough.

The limitation is that it is not usually the best answer for businesses with stricter compliance demands, advanced threat protection requirements or a growing cyber risk profile. It can be a practical tool, but there is a point where outgrowing it becomes inevitable.

Nubis 365 manages a number of Draytek units particularly in the smaller business we support. They are robust enough for small businesses but if throughput is required then we would opt for a Sonicwall or Cisco solution.

UniFi Gateway and similar budget-led platforms

Some businesses are drawn to UniFi and similar platforms because the hardware looks appealing and the entry cost can be lower. For straightforward networking, they can be useful. For business-grade security, they need careful scrutiny.

If your priority is cyber security, compliance and dependable business continuity, a budget-led approach can become a false economy. Lower upfront spend may mean fewer advanced protections, weaker reporting or more management burden later. For some micro businesses that is acceptable. For many established firms, it is not.

Unifi is becoming a mainstay at Nubis 365 and we re particularly enamoured with the brilliant management interface.

Sophos Firewalls

Sophos is a strong fit for businesses that want solid protection, clear policy control and a platform that works well as part of a broader cyber security approach. It is often a sensible choice for organisations that value web filtering, application control, VPN access and straightforward visibility into what is happening on the network.

One of Sophos’ strengths is that it is accessible enough for SMEs while still offering advanced capability. That makes it attractive for growing firms that do not want to replace everything again in a year. The trade-off is that you still need someone who understands how to configure rules, licensing and ongoing updates properly. Buying the hardware is the easy bit. Managing it well is where the value sits.

Nubis 365 has had many years of practice setting up Sophos firewalls and they are particularly useful when managing web filtering easily.

WatchGuard Fireboxes

WatchGuard tends to appeal to businesses that want a good balance between security, usability and centralised management. It is often well suited to firms with one main office and a handful of remote users, as well as businesses with multiple locations that need consistent policy control.

Its reporting and visibility are generally strong, which helps if you need to explain security decisions to directors or support compliance work. Pricing can be reasonable for the feature set, but the overall cost depends on the security bundle and support term you choose. As with most firewall platforms, the cheapest licence rarely gives you the level of protection most businesses actually need.

Nubis 365 has many years of experience setting up Watchguard firewall solutions and they have their place in mall to medium sized businesses.

How to choose between the best small business firewall options

The first mistake is choosing on brand alone. The second is choosing on headline price. What matters is fit.

A small legal firm handling sensitive data needs strong access controls, secure remote connectivity and dependable support if something stops working. A warehouse and distribution business may need stable site-to-site connectivity, guest network separation and enough performance for scanners, VoIP and cloud platforms. A GP practice, finance team or professional services firm may also need reporting that supports compliance conversations and cyber insurance requirements.

This is where planning pays off. You should size the firewall for where the business is going, not just where it is today. If you are adding staff, moving more systems into Microsoft 365, opening another office or increasing home working, buy with that in mind. Replacing an underpowered appliance too soon costs more than getting the specification right at the start.

Management is equally important. If nobody reviews logs, checks firmware, tests VPN access or updates rules when staff and systems change, the firewall will drift out of alignment with the business. That creates risk and usually causes avoidable support issues. Many SMEs are better served by a managed approach where monitoring, updates and policy changes are part of ongoing support rather than left until something breaks.

Common trade-offs to expect

There is always a balance between cost, usability and security depth. More advanced protection often means higher licensing costs. Easier cloud management can mean committing to a subscription model. A highly capable platform may require more specialist administration than a smaller business wants to maintain internally.

There is also the question of user experience. Tight web filtering, intrusive VPN settings or badly tuned security policies can frustrate staff and interrupt day-to-day work. Good firewall design protects the business without making basic tasks harder than they need to be.

That is why the most effective projects start with business requirements, not product brochures. The conversation should cover how your people work, what systems matter most, what downtime would cost, and what level of risk your directors are comfortable with.

When managed support makes the difference

For many SMEs, the real decision is not just which firewall to buy but who will stand behind it. Fast help when the internet fails, sensible advice when the business grows, and clear answers when compliance questions arise matter just as much as the appliance itself.

A managed IT partner can help assess the network, recommend the right platform, configure it properly, and keep it aligned with the rest of your environment over time. That is especially valuable if you rely on a small internal team or have no in-house IT at all. Businesses do not need another box on the wall. They need confidence that the network is secure, stable and ready for what comes next.

If you are weighing up the best small business firewall options, start with your risks, your growth plans and your support model. The right firewall should not just block threats. It should give your business room to operate with fewer interruptions, clearer visibility and far less guesswork.

Always change your firewall Admin passwords as soon as you deploy them.