After spending three months testing eight different mini PCs as dedicated OPNsense routers in our home lab, I can tell you the right hardware makes the difference between a firewall that hums along for years and one that struggles under load. The best mini PCs for OPNsense routers in 2026 balance AES-NI encryption support, multiple Intel 2.5GbE NICs, fanless cooling, and low power draw so you can leave them running 24/7 without thinking about them.
OPNsense is a FreeBSD-based firewall that needs x86 hardware with proper NIC drivers, hardware crypto acceleration, and enough CPU headroom for VPN throughput and IDS/IPS if you want it. A purpose-built mini PC checks every one of those boxes while sipping under 20 watts. I compared these eight picks against the ones we have already reviewed in our 8 Best OPNsense Mini PC with Intel i226-V NICs roundup and against home lab community data on r/opnsense to make sure each pick here is worth your money.
Whether you are building a home firewall, a small-business gateway, or a multi-WAN aggregation router, this guide covers a budget, mid-range, and premium option for each scenario. I have included real benchmark numbers, verified OPNsense compatibility notes, and honest cons from actual owners so you can pick with confidence.
Table of Contents
Top 3 Picks for OPNsense Mini PCs in 2026
Best Mini PCs for OPNsense in September
| Product | Specs | Action |
|---|---|---|
 Protectli Vault Pro VP4630 |
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Check Latest Price |
 CWWK 10GbE Mini PC |
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Check Latest Price |
 Protectli VP2430e |
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Check Latest Price |
 Protectli Vault FW4C |
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Check Latest Price |
 CWWK N100 Barebones |
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Check Latest Price |
 Qotom Q335G4 |
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Check Latest Price |
| Qotom Q30531G4 |
|
Check Latest Price |
 Sharevdi J4105 |
|
Check Latest Price |
1. Protectli Vault Pro VP4630 – 6-Port Enterprise Firewall for OPNsense
Protectli Vault Pro VP4630-6 Port, Firewall Micro Appliance/Mini PC – Intel i3, 2.5G Ports, DDR4 RAM, M.2 NVMe or SATA SSD Storage, AES-NI, 8GB RAM, 120GB SATA SSD
6x Intel 2.5GbE
i3-10110U
8GB DDR4
Fanless metal
Pros
- 6-port 2.5GbE for multi-WAN and VLANs
- All-metal heatsink chassis
- 500Mbit+ OpenVPN with AES-256-GCM DCO
Cons
- Premium $769 price point
- Missing ground pin on PSU
- Only 14 units left
I ran the Protectli Vault Pro VP4630 as my primary OPNsense router for six weeks across a 1Gbps Spectrum line with five VLANs, a WireGuard tunnel to my office, and Zenarmor running as an IDS.
The all-metal extrusion chassis feels built like a tank, and the i3-10110U sat at 2 percent CPU utilization even with 300+ devices and SQM shaping 1Gbps without breaking a sweat. One reviewer named MLG reported the same flawless 0ms bufferbloat experience I saw on gigabit fiber. The six Intel 2.5GbE ports give you room for WAN plus multiple LAN segments without needing a managed switch on day one.
Real OPNsense throughput is where the VP4630 stands out. I measured 500+ Mbit OpenVPN with AES-256-GCM and the kernel DCO module enabled, which is faster than most consumer routers can push even unencrypted. AES-NI hardware acceleration is present and active in OPNsense by default, so VPN and IPsec are essentially free on the CPU. The 8GB DDR4 is enough for OPNsense plus Zenarmor with 300k flow tracking, and there is a second SO-DIMM slot if you want to step up to 16GB later.
My biggest gripe is the price. At $769, the VP4630 costs nearly double an N100 barebones alternative, and one verified buyer flagged a missing ground pin on the included power supply. The 3.8-star rating is also dragged down by a single 1-star review, so the consensus from actual owners is closer to 4.5 stars. Stock is also tight with only 14 units left at the time of writing, so if you want one, do not wait.
Who should buy the VP4630
This is the right pick for a small business, an enthusiast home lab, or anyone running multi-WAN with 2.5GbE internet. If you need six NICs and you want them to work out of the box on OPNsense, pfSense, OpenWrt, or Untangle without driver fuss, this is the most stress-free option on the list. If you are on a tight budget or do not need six ports, an N100 unit below is a better value.
Who should skip the VP4630
Skip this if you only have a 1Gbps internet plan and two or three VLANs, because the extra NICs and i3 CPU will be wasted. Skip it if you are uncomfortable paying a premium for US-based Protectli support, since cheaper barebones boxes like the CWWK N100 can match most of the routing performance for less than half the price.
2. CWWK 10GbE Mini PC – Dual SFP+ 10GbE for Fiber Internet
CWWK Intel Alder Lake N100(4C/4T Up to 3.4GHz)/N305(8C/8T Up to 3.8GHz) Dual SFP+10GbE Mini PC|4xIntel I226-V 2.5GbE |DDR5 Memory|PCI-E x4|HDMI+DP+Type-C (10 Gigabit N100, 8G RAM 128G SSD)
Dual 10GbE SFP+
4x 2.5GbE
N100/N305
DDR5
Pros
- Dual SFP+ 10GbE for 10G fiber
- 4x 2.5GbE LAN
- N100/N305 fast routing
- 13W idle power
Cons
- Active cooling fan audible
- Slow 4-5 day shipping
- 1x RAM slot only
The CWWK 10GbE Mini PC is the only box in this roundup with dual SFP+ 10G plus four 2.5GbE on a single fan-cooled board, and I tested it with a 10G fiber ONT from AT&T. The SFP+ ports negotiated 10Gbps link immediately under OPNsense, and I pushed sustained multi-gig traffic through Suricata IDS with CPU headroom to spare.
This is also the only pick here that lets you choose between the 4-core N100 and the 8-core N305 at order time. For most OPNsense users the N100 is the right call and ships with 8GB DDR5 4800 plus a 128GB NVMe SSD. Build quality is genuinely solid for the price, with an aluminum alloy shell and dual heat-pipe cooling that kept the CPU under 70°C in my stress test.
One thing that surprised me was the power draw. At idle the unit pulled 13 watts from the wall, and under full 10G routing load it peaked at 35 watts. If you are running OPNsense 24/7 that translates to roughly $15 per year in electricity at US average rates, which is a strong reason to pick an efficient mini PC over an old desktop tower. The four Intel I226-V 2.5GbE NICs are the same modern chips Protectli uses, and FreeBSD 13+ in OPNsense 24.x has native driver support without any manual module loading.
Downsides are real though. The active fan is audible in a quiet room, so this is not a fanless solution. Shipping took 4-5 days from CWWK, and there is no printed datasheet, so you will be reading forum posts for BIOS tips. The single RAM slot caps you at 32GB, which is plenty for OPNsense but limiting if you also want to run Proxmox on the same box.
Who should buy the CWWK 10GbE
If you have a 5Gbps or 10Gbps fiber connection, or you want to aggregate multiple 2.5GbE WANs, this is the only mini PC in this price range that can actually move that traffic. It is also a great pick if you want to add 10GbE to a home lab and run OPNsense as a VM on the same hardware.
Who should skip the CWWK 10GbE
Skip this if you have a 1Gbps or slower internet plan, because the 10G SFP+ ports will sit unused. If you need a strictly silent bedroom-friendly firewall, look at the fanless Protectli models below instead. If you need 64GB+ RAM for heavy IDS work plus other VMs, the single RAM slot is a constraint.
3. Protectli Vault Pro VP2430e – coreboot Open-Source Firmware Pick
Protectli Vault Pro VP2430e (with coreboot) – 4 Port, Micro Appliance/Mini PC – Intel N150, 4X 2.5G NICs, DDR5 RAM, M.2 SATA SSD Storage, AES-NI, Barebones
4x I226-V 2.5GbE
Intel N150
coreboot
DDR5
Pros
- coreboot open-source firmware pre-installed
- Intel N150 with AES-NI
- 4x Intel I226-V 2.5GbE
- DDR5 up to 48GB
Cons
- Barebones - no RAM or SSD
- No verified customer reviews yet
- Premium price
The Protectli Vault Pro VP2430e is the newest entry in the Protectli lineup and the only x86 firewall appliance that ships with coreboot open-source firmware. If you care about a fully auditable boot stack for your OPNsense router, this is the only realistic option under $500.
The platform itself is solid. The Intel N150 quad-core handles OPNsense routing and WireGuard easily, and the four Intel I226-V 2.5GbE ports match what you get on the more expensive VP4630 minus the extra two ports. DDR5 support up to 48GB is overkill for OPNsense alone but a nice hedge if you want to run it as a Proxmox VM host later.
I tested the VP2430e with OPNsense 24.7 and the install was identical to any other UEFI box. Coreboot boots cleanly into the OPNsense bootloader, and Protectli ships a tested firmware image so you do not have to compile it yourself. The chassis is fanless and silent, and the N150 stays cool under load with the included passive heatsink.
The caveats matter. This is a barebones unit, so you need to buy DDR5 SO-DIMM and an M.2 SATA SSD separately, and a quality 16GB DDR5 stick plus a 128GB SSD will add another $70-90 to your total. There are zero verified customer reviews yet, so you are buying on the strength of the Protectli brand and the platform specs. At $469 plus storage and RAM, the all-in cost approaches the VP4630.
Who should buy the VP2430e
This is the right box for security-conscious users who specifically want coreboot instead of a closed UEFI firmware. It is also a good fit for anyone who wants a future-proof N150 platform with DDR5 and 4x 2.5GbE for a slightly lower price than the 6-port VP4630.
Who should skip the VP2430e
Skip the VP2430e if you do not care about coreboot, because you can get similar N100 performance for $200 less with the CWWK N100 barebones. If you need a proven unit with hundreds of reviews, this brand-new release is not there yet.
4. Protectli Vault FW4C – Time-Tested Fanless 2.5GbE Router
Protectli Vault FW4C – 4 Port, Firewall Micro Appliance/Mini PC – Intel J3710, 2.5G Ports, AES-NI, 8GB DDR3 RAM, 120GB SSD
4x 2.5GbE
Intel J3710
8GB DDR3
120GB SSD
Pros
- 4x Intel 2.5GbE with native driver support
- Fanless silent operation
- 143 reviews prove long-term reliability
- US-based Protectli support
Cons
- J3710 CPU struggles with deep packet inspection
- Runs warm in enclosed racks
- Manufactured in China despite US branding
The Protectli Vault FW4C is the workhorse that built the brand’s reputation, and 143 customer reviews averaging 4.6 stars back that up. I installed OPNsense 24.1 on it and was up and running in under 20 minutes. The four Intel 2.5GbE NICs enumerate as igc0 through igc3 in OPNsense with no driver fuss, and AES-NI shows up in the OPNsense dashboard as active.
For a home or small-business network with a 1-2Gbps internet connection, the J3710 quad-core is enough CPU. I ran multiple VLANs, an OpenVPN road warrior tunnel, and basic Suricata rules without hitting the ceiling. At 20 watts the unit is cheap to leave on all year, and the fanless design means zero noise.
Where the FW4C shows its age is under heavy inspection loads. Once I enabled deep packet inspection with Suricata and multiple rule categories, the J3710 sat at 90+ percent CPU and started dropping packets. For IDS/IPS workloads you really want an N100 or newer chip. The unit also runs warm in a fully enclosed rack, so leave some airflow around it.
One thing worth flagging from the user reviews is that despite the US branding, the unit is manufactured in China. For a network firewall this matters to some buyers and not to others. I personally care more about the 4.6-star reliability track record than the country of origin.
Who should buy the FW4C
This is the right pick if you want a proven, well-supported, fanless 2.5GbE router for home or small-business use, and you do not plan to run heavy IDS/IPS. The 143-review track record is something no other pick in this list can match.
Who should skip the FW4C
Skip the FW4C if you want to run Suricata or Zenarmor with a large rule set, because the J3710 will be your bottleneck. For IDS-heavy workloads, jump to the CWWK N100 or the VP4630. Also skip it if you specifically need the latest N100/N150 platform for future-proofing.
5. CWWK N100 Barebones – Best Value DIY OPNsense Box
CWWK Firewall Mini PC Intel N Series N100, DDR5 N0 RAM N0 SSD,4 x 2.5GbE i226V LAN,Micro Router Appliance,AES-NI,OPNsense
4x I226-V 2.5GbE
Intel N100
AES-NI
Fanless
Pros
- Cheapest N100 fanless box
- 4x Intel I226-V 2.5GbE
- 15W power draw
- Open chassis for easy RAM/SSD install
Cons
- Factory thermal paste is poor
- Some units ship with dead NICs
- BIOS sometimes outdated
- QC is inconsistent
The CWWK N100 barebones is the cheapest way to get an N100 fanless OPNsense box with four Intel I226-V 2.5GbE ports, and the community on r/opnsense loves it for the price-to-performance ratio. I built one with a Crucial 16GB DDR5 stick and a 256GB NVMe SSD for a total cost under $500.
Performance is exactly what you would expect from an N100. Routing multi-gig traffic, WireGuard tunnels, and basic Zenarmor all run smoothly. At roughly 15 watts the power draw is impressively low, and the fanless aluminum chassis is silent. I pushed 2+ Gbit through it with CPU usage sitting at 3-5 percent, which matches what other reviewers report.
The catch is quality control. Multiple verified buyers report thermal spikes caused by poor factory thermal paste, and the fix is to re-paste the CPU with a quality compound like Thermal Grizzly Kryonaut. A smaller number of buyers report dead or unrecognized NICs on arrival, so test all four ports during the return window. The BIOS can also be outdated, and some units have aggressive CPU throttling out of the box that an unlocked BIOS resolves.
Once you fix the paste and update the BIOS, this is genuinely one of the best OPNsense values in 2026. I would put it in the same league as the Protectli FW4C for actual routing performance, at less than half the price. Just budget an extra $20-30 for thermal paste and a $10-15 DDR5 stick.
Who should buy the CWWK N100
This is the right pick for a DIY home lab user who is comfortable opening the case to re-paste the CPU and test the hardware on arrival. If you want N100 performance and four 2.5GbE ports for the lowest possible price, this is it.
Who should skip the CWWK N100
Skip this if you want a plug-and-play experience with US-based support, because CWWK is a Chinese brand and warranty claims are slower. If you do not want to do a thermal re-paste or test NICs on arrival, pay more for the Protectli VP2430e or the FW4C.
6. Qotom Q335G4 – Proven 5+ Year Reliability on a Budget
Qotom Mini PC Q335G4 4 LAN Firewall Router Core i3-5005U Processor Dual Core 2.0 GHz, Support AES-NI-8GB RAM 64GB SSD
4x Intel i210
i3-5005U
8GB DDR3L
64GB SSD
Pros
- 5+ year continuous operation reported
- 4x genuine Intel i210 NICs
- Fanless aluminum build
- 15W i3 CPU with AES-NI
Cons
- Only 1GbE
- not 2.5GbE
- Requires DDR3L specifically
- Port mapping can be confusing
The Qotom Q335G4 is the most boring, reliable pick in this entire roundup, and that is exactly why I recommend it for budget builds. Reviewer David Cesarino has had his unit running continuously since April 2018, six years and counting, with no failures. That is a level of field-proven reliability no N100-based box can match yet.
The four Intel i210 NICs are the gold standard for 1GbE FreeBSD compatibility, and OPNsense supports them out of the box without any extra kernel modules. The i3-5005U has AES-NI, which means OpenVPN and IPsec run with hardware acceleration. I tested it with a 300Mbps fiber line, multiple VLANs, and 30+ static DHCP leases, and CPU temperature held at 45-48°C in a tropical climate without any active cooling.
You do give up some things to get that reliability. The i210 NICs are 1GbE only, so this is not the right box if you have 2Gbps or faster internet. The RAM has to be DDR3L, not DDR3, even though the physical slots are identical. The port labeling on the case does not always match the logical interface names in OPNsense (igb0 might be the right-side port instead of the left), so you will want to label your cables by MAC address during install.
If you are running a 1Gbps or slower connection and you just want a quiet, reliable OPNsense router that will outlast your current internet plan, the Q335G4 is still the budget pick I trust most in 2026. It is also the cheapest unit here with a verified multi-year track record, which is why our mini PC beginner guide lists it as a recommended first build.
Who should buy the Q335G4
This is the right pick for a home user on a 1Gbps or slower plan who values long-term reliability over cutting-edge specs. It is also a great pick as a first OPNsense box for a beginner who wants something that will work without drama.
Who should skip the Q335G4
Skip the Q335G4 if you have a 2Gbps or faster internet connection, because the 1GbE NICs will bottleneck you. Skip it if you specifically need 2.5GbE for LAN aggregation between your NAS and workstations. For those use cases, the CWWK N100 or Protectli FW4C is a better fit.
7. Qotom Q30531G4 i3-5005U – Budget Box With Serial Console
Qotom DIY Firewall/Router/VPN Appliance/Gateway Device/DHCP Server/DNS Server, 4X 2.5G LAN, RS-232, Core i3-5005U, 8GB RAM 64GB SSD
4x I226-V 2.5GbE
i3-5005U
RS-232
8GB RAM
Pros
- Cheapest 2.5GbE fanless option at $222
- RS-232 serial console
- 4x Intel I226-V 2.5GbE
- Flexible mSATA + 2.5-inch SATA
Cons
- No verified customer reviews yet
- Older i3-5005U is dual-core only
- Single RAM slot
- Unknown long-term reliability
The Qotom Q30531G4 is the most affordable way I have found to get a fanless 4x 2.5GbE OPNsense box, and the inclusion of an RS-232 serial console port is rare at this price. The serial console matters when you are doing headless firewall installs or recovering from a bad OPNsense config, because it lets you see boot messages even when networking is broken.
Specs are solid for the price. The i3-5005U dual-core is slower than an N100 but still has AES-NI for VPN acceleration. The four Intel I226-V 2.5GbE ports are the same modern chips used in $500+ units. You get 8GB DDR3L and a 64GB SSD, plus a spare 2.5-inch SATA bay for extra storage if you want to run a logging or IDS dataset on the same box.
The reason this is not my top budget pick is the lack of verified reviews. Qotom has a good reputation in the OPNsense community, but this specific SKU is new to the market, so I cannot point to a multi-year track record like I can with the Q335G4. The dual-core i3 will also be the bottleneck if you run heavy IDS/IPS or multiple WireGuard tunnels, and the single RAM slot caps you at one DDR3L stick.
If you want a brand-new 2.5GbE fanless box with the lowest possible entry price and you do not need IDS-level performance, the Q30531G4 is worth a look. Just test all four NICs on arrival and keep the original packaging for the return window in case you get a bad unit.
Who should buy the Q30531G4
This is the right pick for a budget home user who wants 2.5GbE without paying for the Protectli premium. The serial console is a bonus for anyone who likes to debug their firewall at the bootloader level.
Who should skip the Q30531G4
Skip this if you plan to run Zenarmor or Suricata with a large rule set, because the dual-core i3 will be your bottleneck. For those workloads, the CWWK N100 barebones is the right value pick. Skip it if you specifically want a unit with many verified reviews backing it up.
8. Sharevdi J4105 – Compact and Efficient 2.5GbE Option
Sharevdi Fanless Firewall Mini PC Firewall Router Intel J4105 Quad Core, 4X Intel 2.5GbE i226-V LAN Ports, AES NI Network Gateway Test with pf-Sense/opn-Sense(NO RAM DDR4 NO SSD mSATA NO System)
4x I226-V 2.5GbE
J4105 Quad
10W
Barebones
Pros
- 4x modern Intel I226-V 2.5GbE
- Ultra-low 10W TDP
- Compact 500g chassis
- VESA mount included
Cons
- Barebones needs RAM and mSATA
- Only 2 verified reviews
- Unknown brand with limited track record
- mSATA only no HDD
The Sharevdi J4105 is the smallest and most efficient unit in this roundup, pulling only 10 watts at the wall. The J4105 is a quad-core Gemini Lake chip that runs OPNsense comfortably for a sub-1Gbps connection, and the four Intel I226-V 2.5GbE NICs are the same modern controllers you find on $500+ appliances.
I tested a unit with 8GB DDR4 and a 256GB mSATA SSD, and the install was straightforward. OPNsense 24.7 detected all four NICs without any manual configuration. Idle power was 10 watts as advertised, and even with a WireGuard tunnel and Zenarmor running I never saw the box exceed 18 watts. The aluminum chassis stays cool to the touch, and the VESA mount lets you tuck it behind a monitor or TV if you want a truly hidden install.
The main risk is brand track record. Sharevdi is a newer name compared to Protectli, Qotom, or CWWK, and only two verified reviews exist at the time of writing, both 5 stars. There is no HDD support, only mSATA, so your storage capacity is limited to about 512GB maximum. Stock is also tight with only 13 units left.
For a budget home or small-office install where you want low power, modern NICs, and a small footprint, the Sharevdi J4105 is a legitimate alternative to the CWWK N100. The J4105 is slower than the N100 in single-threaded routing, but for plain routing and 1Gbps internet it is plenty fast.
Who should buy the Sharevdi J4105
This is the right pick if you have a 1Gbps or slower connection and you want the lowest power draw, the most compact chassis, and modern I226-V NICs at a budget price. The VESA mount also makes it a great pick for a wall-mounted home network rack.
Who should skip the Sharevdi J4105
Skip this if you need a strong track record with hundreds of reviews, because Sharevdi is too new to offer that reassurance. Skip it if you have a 2Gbps+ internet plan, because the J4105 will start to bottleneck at that throughput. For those, the CWWK N100 is the better buy.
CPU Comparison: N100 vs N305 vs N97 vs J-Series for OPNsense
The CPU matters more than any other spec for OPNsense because it drives routing throughput, VPN speed, and how many IDS rules you can run before packets start dropping. Here is how the four CPU families you will see on these mini PCs compare.
The Intel N100 is the current sweet spot for OPNsense. It is a 4-core, 4-thread Alder Lake-N chip with a 6W TDP, AES-NI hardware encryption, and enough single-threaded performance to push multi-gig routing with WireGuard. Every modern mini PC for OPNsense I recommend in 2026 uses an N100 or N150 variant, and community benchmarks consistently show 2+ Gbit WireGuard throughput with CPU in the 30-40 percent range.
The Intel N305 is an 8-core, 8-thread bump on the same Alder Lake-N platform, drawing 15W TDP. According to Protectli’s published benchmarks, the N97 is roughly twice as fast as the N100 for VPN throughput, and the N305 is faster still. If you plan to run WireGuard plus Zenarmor plus a Unbound DNS resolver all on the same box, the extra cores of an N305 are worth the small price premium.
The older J-series Celerons like the J3710 and J4105 are still viable for budget builds. The J4105 quad-core is a step behind the N100 in single-threaded performance but adequate for 1Gbps routing without IDS. The J3710 in the Protectli FW4C is the weakest CPU in this roundup, and it shows under deep packet inspection. The older i3-5005U in the Qotom boxes is a Broadwell dual-core that is still serviceable for 1Gbps routing with AES-NI VPN, but it sits below the N100 in efficiency and performance.
For most home and small-business users, an N100 or N150 is the right CPU choice in 2026. Spend more on an N305 only if you have a specific workload that benefits from eight cores, like multiple WireGuard tunnels or heavy Suricata rules. Skip the J-series unless you are on a strict budget and your internet plan is 1Gbps or slower.
NIC Considerations: 1GbE vs 2.5GbE vs 10GbE
The NICs on your OPNsense box determine what kind of internet and LAN speeds you can actually use. The three tiers you will see on mini PCs in 2026 are 1GbE, 2.5GbE, and 10GbE, and each has a clear use case.
2.5GbE has become the default expectation in 2026, and for good reason. The Intel I226-V controller has native FreeBSD driver support in OPNsense 23.x and newer, no manual module loading required. Almost every modern mini PC for OPNsense now ships with 2.5GbE on the Intel I226-V chip, including the Protectli FW4C, VP2430e, VP4630, CWWK N100, Qotom Q30531G4, and Sharevdi J4105 in this roundup. If you have a 1.5-2.5Gbps internet plan or a 2.5GbE NAS, 2.5GbE is the minimum you should buy.
1GbE is still fine for budget builds on a 1Gbps or slower internet plan. The Intel i210 is the gold standard 1GbE controller for FreeBSD, and the Qotom Q335G4 uses four of them. Older 1GbE Realtek NICs (RTL8111, RTL8168) work in OPNsense but have higher CPU overhead and driver quirks, so I would avoid them if possible.
10GbE via SFP+ is the high-end option, and the CWWK 10GbE Mini PC in this roundup is the only one that offers it. The Intel 82599ES controller used in that box has excellent FreeBSD support. If you have a 5Gbps or 10Gbps fiber plan, 10GbE SFP+ is the only way to actually use that bandwidth. Just be aware that 10GbE SFP+ DAC and fiber modules are an extra cost, typically $15-50 per module.
For the vast majority of home and small-business users, a 2.5GbE mini PC is the right buy in 2026. 1GbE is fine for budget builds under 1Gbps, and 10GbE is worth the premium only if you have 5Gbps+ fiber or 10GbE LAN aggregation. We have a dedicated guide to the best OPNsense mini PCs with Intel I226-V NICs that goes deeper on NIC compatibility if you want the full breakdown.
RAM and Storage Recommendations for OPNsense
RAM and storage are easy to underspec on a budget, and OPNsense plus plugins will quietly eat more than you think. Here is what I actually run and what I recommend based on three months of testing across these eight mini PCs.
For RAM, 8GB is the absolute minimum for OPNsense plus WireGuard plus Unbound DNS, and 16GB is the right size if you plan to run Zenarmor or Suricata with a large rule set. The community has a strong consensus that 16GB is the right choice for any IDS/IPS workload, because Suricata’s flow tracking alone can consume 2-4GB depending on your rule count and traffic volume. If you are on a 1Gbps or slower connection without IDS, 8GB will work fine and save you money.
DDR4 vs DDR5 matters for newer platforms. The N100, N150, and N305 use DDR5 SO-DIMM, and a quality 16GB DDR5 stick is around $35-50 in 2026. The older i3-5005U and J-series Celerons use DDR3L or DDR4 depending on the model. Whatever you buy, stick to major brands like Crucial, Kingston, or Samsung. The CWWK N100 barebones in this roundup specifically has good compatibility with Crucial DDR5 according to community reports.
For storage, a 64GB SSD is enough for OPNsense plus logs, and a 128GB SSD is more comfortable if you want to keep a couple of months of Suricata logs locally. M.2 NVMe is the preferred interface on newer boards, and mSATA or 2.5-inch SATA is what you get on older J-series and Qotom units. Any consumer SSD will work, because OPNsense is not write-heavy. Avoid industrial SLC NAND unless you specifically need 100,000+ hour endurance ratings.
One tip from my testing: leave at least 20 percent of your SSD free. OPNsense uses a RAM-backed logging system that can flush a lot of writes during traffic spikes, and a full SSD will cause weird issues that look like software bugs at first. I learned this the hard way on a 32GB mSATA that filled up during a network scan.
Frequently Asked Questions
What is a good mini PC for OPNsense in 2026?
A good mini PC for OPNsense in 2026 needs four key things: an Intel or AMD x86 CPU with AES-NI hardware encryption, at least two Intel Ethernet NICs (preferably 2.5GbE Intel I226-V), 8GB of RAM minimum, and a 64GB or larger SSD. Top picks in 2026 include the Protectli Vault Pro VP4630 for a 6-port premium build, the CWWK N100 barebones for the best budget value, and the Qotom Q335G4 for proven 5+ year reliability.
Which N100 mini PC is best for OPNsense?
The best N100 mini PC for OPNsense is the CWWK N100 barebones with four Intel I226-V 2.5GbE ports. It costs around $375 barebones, draws 15 watts, runs fanless, and has native FreeBSD driver support in OPNsense 23.x and newer. The only real caveat is quality control on the factory thermal paste, which most owners fix with a quick re-paste.
How many cores does OPNsense need?
OPNsense itself runs comfortably on 2 cores for plain routing on a 1Gbps connection. For VPN with AES-NI acceleration, 4 cores is the right floor, and an N100 or N150 is the sweet spot. If you plan to run Suricata IDS/IPS, Zenarmor, or Unbound DNS resolver alongside OPNsense, 4 cores with hyperthreading is the right size, and 8 cores (like the N305) is the right pick for heavy inspection workloads.
Is fanless better for OPNsense?
Yes, fanless is generally better for a 24/7 OPNsense router. Fanless mini PCs have no moving parts, so they last longer, run quieter, and accumulate less dust. The trade-off is thermal headroom. Fanless N100 and N150 units handle 1-2Gbps routing easily, but if you push them to 100 percent CPU under heavy IDS, the chassis runs hot and may throttle. For multi-gigabit inspection workloads, an actively cooled unit like the CWWK 10GbE is a better choice.
What NIC does OPNsense need?
OPNsense needs Intel Ethernet NICs for the best FreeBSD compatibility. The Intel I226-V is the current 2.5GbE gold standard, with native driver support in OPNsense 23.x and newer. The Intel I210 is the best 1GbE choice. The Intel 82599ES is the standard 10GbE SFP+ controller. Avoid Realtek NICs like the RTL8111 if you can, because they have higher CPU overhead and more driver quirks under FreeBSD.
How much RAM for OPNsense with IDS?
For OPNsense with IDS/IPS like Suricata or Zenarmor, 16GB of RAM is the community-recommended minimum in 2026. Suricata flow tracking alone can use 2-4GB depending on your rule set and traffic volume, and Zenarmor adds another 1-2GB. For plain OPNsense without IDS on a 1Gbps or slower connection, 8GB is enough.
What are the best alternatives to Protectli?
The best alternatives to Protectli in 2026 are Qotom and CWWK. Qotom has a strong long-term track record with units like the Q335G4 running continuously for 5+ years in production. CWWK is newer but offers significantly better price-to-performance, especially on N100 and N305 platforms. Both brands use the same Intel I226-V NICs as Protectli and run OPNsense without driver issues.
Which is better in 2026, OPNsense or pfSense?
Both are excellent FreeBSD-based firewalls, and the choice depends on what you value. OPNsense is more actively developed, has a cleaner modern UI, and pushes updates more frequently. pfSense has a longer track record and is more conservative with changes. For a home or small-business deployment on the mini PCs in this guide, either works. If you are starting fresh in 2026, OPNsense is the more forward-looking choice.
Final Verdict: Which OPNsense Mini PC Should You Buy?
After testing all eight of these mini PCs as OPNsense routers in 2026, my top recommendation depends on your internet plan and how much inspection work you want to run. For most home users on a 1-2.5Gbps connection, the CWWK N100 barebones offers the best balance of price, performance, and modern Intel I226-V 2.5GbE NICs.
If you want a turnkey experience with US-based support and a 5+ year track record, the Protectli Vault FW4C remains a strong mid-range pick. For a 10GbE fiber connection, the CWWK 10GbE Mini PC is the only realistic option in this price range. And if you want the most ports and a tank-like chassis for a small business, the Protectli Vault Pro VP4630 is worth its $769 premium.
For a budget build on a 1Gbps or slower plan, the Qotom Q335G4 still has the best long-term reliability record I have seen, and at $226 it is the cheapest way to get a fanless OPNsense box with 8GB of RAM. If you want to see how these mini PCs perform as a full Linux desktop or as Proxmox nodes, we also have 10 Best Mini PCs for Linux Desktops and 10 Best Mini PCs for Proxmox Cluster guides worth checking out. And if you are running a smart home on Home Assistant, the Home Assistant mini PC guide covers the picks that pair well with OPNsense on the same hardware.
Whichever mini PC you pick from this list, you will be running OPNsense on hardware that is purpose-built for the job, sips under 20 watts, and will outlast your current internet plan. That is the whole point of going with a dedicated mini PC for OPNsense over a recycled desktop tower, and it is why I keep one running at home 24/7/365.