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Best firewalls under £400 (2026)

The firewalls we've reviewed that cost £400 or less, best first. Each is scored against products at a similar price, so a high score here means good for the money. Where we don't have today's price, we use the typical UK price we found when researching it.

Researched, not hands-on tested.How we review ›

  1. #1

    Ubiquiti UniFi Cloud Gateway Max

    7.3/10verdict: buy

    The UniFi Cloud Gateway Max is for people who want a compact router, firewall and IDS/IPS box running Ubiquiti's UniFi software. It suits a UK gigabit line or faster, thanks to a 2.5GbE WAN port and a vendor IDS/IPS figure of 2.3 Gbps. It is a better fit for existing or planned UniFi users than for anyone who wants non-proprietary software.

    2.3 Gbps IDS/IPSFive 2.5G/1G/100M/10M RJ45 portsUniFi Application Suite
    Read the full review ›
    Ubiquiti UniFi Cloud Gateway Max
    £272.40typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)

    Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

  2. #2

    Ubiquiti Dream Machine Pro (UDM-Pro)

    7.1/10verdict: good, not the best

    The UDM-Pro suits homelabbers and small offices that want routing, firewalling, IDS/IPS and VPN in one UniFi OS device. It is a good fit if you already run, or plan to run, other UniFi products. Buyers who need proven stability or quick support should read the owner complaints first.

    3.5 Gbps IDS/IPS throughput9 RJ45 GbEUniFi OS with the UniFi Application Suite…

    16W idle · £36.89/year to run · £506.67 over three years, all in

    Read the full review ›
    Ubiquiti Dream Machine Pro (UDM-Pro)
    £396typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)

    Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

  3. #3

    Ubiquiti Cloud Gateway Ultra (UCG-Ultra)

    6.6/10verdict: good, not the best

    The Ubiquiti Cloud Gateway Ultra suits home, homelab and small-office networks that already use or plan to use UniFi. It lists 1 Gbps of IDS/IPS throughput, so it matches a gigabit line with inspection switched on. Buyers who need SFP+, several multi-gig LAN ports or a published firewall throughput figure should look at the details first.

    1x 2.5GbE RJ45 WAN, 4x GbE RJ45 LANUniFi Network

    4.5W idle · £10.38/year to run · £131.09 over three years, all in

    Read the full review ›
    Ubiquiti Cloud Gateway Ultra (UCG-Ultra)
    £99.96typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)

    Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

  4. #4

    Firewalla Purple

    5.7/10verdict: good, not the best

    Firewalla Purple is for home and small-office users who want an app-managed firewall on a gigabit connection. It suits people who want to avoid a monthly fee and keep power use low. The manufacturer's page says sales are paused, so availability needs checking first.

    1 Gbps software packet processing2x 1 Gbit EthernetFirewalla OSWireGuard 500 Mbps

    7W idle · £16.14/year to run · £348.42 over three years, all in

    Read the full review ›
    Firewalla Purple
    £300typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)

    Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details