Best Network Firewall Software: 7 Firewalls Compared for Enterprise, SMB and Open Source Use

A firewall enforces which traffic may enter and leave your network. Modern next-generation firewalls (NGFWs) add intrusion prevention, application control and TLS inspection to classic packet filtering.

This guide compares seven firewalls from the SaaSPodium directory for IT managers and security leads, and explains how to size, buy and roll out the right one.

How we chose these firewall tools

We selected firewalls listed in the SaaSPodium Firewall Software category and compared them on architecture, deployment, security services, operational fit and pricing model. None of the seven currently has a public rating or review count on SaaSPodium, so we did not rank by score.

Treat the order below as a sorted shortlist by typical customer size, from enterprise to small business and open source. Always run a proof of concept with your real traffic before buying. Throughput figures on datasheets assume ideal conditions, and enabling intrusion prevention and TLS inspection can reduce them considerably.

Palo Alto Networks Next-Generation Firewall

Palo Alto Networks NGFW is an application-aware firewall available as hardware, virtual machine and cloud-delivered appliances, built for large enterprises that want deep traffic visibility and centralized policy.

• Architecture: PAN-OS identifies applications, users and content, so rules can follow business context rather than only ports.
• Security: threat prevention, URL filtering and DNS security are sold as subscriptions on top of the base platform.
• Pricing model: custom quote by appliance and subscription (SaaSPodium lists it as Custom).
• Best fit: enterprises with a security operations team and multi-site networks.

See the full profile on Palo Alto Networks Next-Generation Firewall.

Juniper Networks SRX

Juniper SRX Series firewalls run Junos OS and combine routing, switching-grade throughput and security in one platform, which suits service providers and enterprises that already operate Juniper networks.

• Architecture: Junos OS with a unified routing and security stack and a range of branch to data center models.
• Integration: fits teams that automate network changes with Junos tooling and APIs.
• Pricing model: custom quote by model and license.
• Best fit: network-centric organizations and data centers.

See the full profile on Juniper Networks SRX.

SonicWall

SonicWall sells firewall appliances aimed at small and midsize businesses, distributed offices and managed service providers, with unified threat management features in one box, often bought and supported through channel partners and managed providers.

• Architecture: SonicOS appliances with VPN, intrusion prevention and content filtering.
• Operations note: SonicOS vulnerabilities have been added to the CISA catalog of exploited flaws, so patch cadence matters (see our coverage of CVE-2026-19868).
• Pricing model: custom quote through partners.
• Best fit: SMBs and MSP-managed branch networks.

See the full profile on SonicWall.

Sophos Firewall

Sophos Firewall is a next-generation firewall that links with Sophos endpoint products so a compromised device can be isolated automatically, which appeals to small and midsize teams with limited staff.

• Architecture: appliances, virtual and cloud editions managed locally or from Sophos Central.
• Integration: Synchronized Security shares device health between firewall and endpoint.
• Pricing model: custom quote, with subscription bundles.
• Best fit: SMB and mid-market teams that want one security vendor.

See the full profile on Sophos Firewall.

pfSense

pfSense is an open-source firewall and router distribution based on FreeBSD that you can run on commodity hardware, a virtual machine or purpose-built appliances, which makes it popular with budget-conscious and technical teams.

• Architecture: stateful packet inspection, VPN (IPsec, OpenVPN, WireGuard) and packages for intrusion detection.
• Cost: the community edition is free, with paid appliances and support available.
• Skills: configuration is flexible but demands networking knowledge, and no vendor threat feed is bundled by default.
• Best fit: labs, small offices and teams that value control over convenience.

See the full profile on pfSense.

WatchGuard Firebox

WatchGuard Firebox appliances target small and midsize organizations with security services such as intrusion prevention, malware scanning and cloud-based management, delivered mostly through channel partners and managed service providers.

• Architecture: Firebox appliances managed through WatchGuard Cloud.
• Services: security subscriptions are layered on the base appliance.
• Pricing model: custom quote through resellers.
• Best fit: midmarket companies working with an MSP.

See the full profile on WatchGuard Firebox.

Barracuda CloudGen Firewall

Barracuda CloudGen Firewall is built for distributed networks, combining next-generation firewall features with WAN optimization and SD-WAN-style connectivity for branch offices, data centers and public cloud environments across many regions.

• Architecture: hardware, virtual and public-cloud deployments for sites spread across regions.
• Connectivity: strong fit for retail, hospitality and multi-branch organizations.
• Pricing model: custom quote.
• Best fit: distributed businesses linking many sites to cloud workloads.

See the full profile on Barracuda CloudGen Firewall.

How to choose a network firewall

Choose a network firewall by matching throughput with security services turned on, deployment model, management effort and total cost over three to five years. List your required features first, then test a short list under real load.

• Throughput: size for threat-prevention throughput, not raw firewall throughput.
• Deployment: hardware at branches, virtual or cloud images for data centers and cloud VPCs.
• Inspection: IPS, TLS decryption, application control and DNS filtering.
• Management: central console, API support, change logging and high availability pairs.
• Integration: SIEM, identity provider, endpoint tools and ticketing.
• Lifecycle cost: appliance, subscriptions, support and staff time.

For vendor-neutral guidance on policy design, see NIST SP 800-41 Rev. 1, which covers firewall types, ruleset design and change control. For ransomware hardening, the CISA #StopRansomware Guide recommends segmentation and restricting inbound management access.

Use the formula to compare a cheap appliance with expensive subscriptions against a pricier box with bundled services. Admin time is often the largest hidden term.

Firewall deployment types: appliance, virtual, cloud and open source

Firewalls come as physical appliances, virtual machines, cloud-native services and open-source software. Appliances give predictable throughput, virtual and cloud images follow workloads, and open source lowers license cost at the price of more in-house skill.

• Appliance: best for branch offices and perimeter edge with hardware acceleration.
• Virtual / cloud image: best for AWS, Azure and VMware workloads that need east-west inspection.
• Open source: pfSense is a common example for small sites and labs.
• Managed by an MSP: common for SMBs with no network engineer.

Pair the firewall with monitoring. Our guide to network device monitoring tools covers how to watch firewall health, and the best network security software list covers IDS and vulnerability tools.

Firewall rollout checklist

A safe rollout starts with an inventory of traffic flows, a default-deny policy, staged changes, logging to a SIEM and a tested failover. Skipping flow discovery is the most common cause of outages during firewall migrations.

• Capture 2 to 4 weeks of flow data before writing rules.
• Build rules by application and user group, and document an owner for each.
• Enable logging to a central collector and set alerts on policy changes.
• Test high availability failover and VPN recovery.
• Subscribe to vendor security advisories and set a patch window.

Frequently Asked Questions

How much does a business firewall cost?
Most vendors in this list price by quote based on model and subscriptions, so expect to request quotes. Open-source options like pfSense have no license fee, but you pay for hardware and staff time.

Is a next-generation firewall worth it for a small business?
Usually yes if you host services, allow remote access or must meet compliance rules, because application control and intrusion prevention catch threats that port rules miss. A simple router firewall may be enough for a very small, cloud-only office.

How long does it take to replace a firewall?
A simple branch swap can be done in a day, while a data center migration often takes weeks of planning, rule cleanup and staged cutovers. Allow time for traffic discovery and rollback plans.