Main trade-off
TP-Link Archer BE400
No 6 GHz and only one multi-gigabit local socket.
Head-to-head
TP-Link Archer BE400 vs BE550: 6 GHz and fast cables change the upgrade
The short answer
Choose BE550 for a 2.5G NAS and computer connected directly, or a compatible 6 GHz device. It has four 2.5G LAN sockets. BE400 has one 2.5G LAN and three gigabit sockets, but four 5 GHz spatial streams against BE550’s two. Consider BE400 for a verified four-stream 5 GHz requirement when one fast local socket is enough. Neither router joins a Deco system as a unified mesh node.
Before you choose
The reasoning and the trade-offs
A shared archive can justify BE550 even if no one owns a 6 GHz laptop
A 2.5G NAS and computer need two fast local sockets to connect directly at that link rate. BE400 supplies one after WAN, while BE550 supplies four. In a small office that already has a work dock, storage and entertainment cables, BE550 can avoid adding a separate multi-gigabit switch. The benefit comes from Ethernet, so it does not depend on anyone using 6 GHz. If the storage or computer is only gigabit, or a suitable switch already exists, this particular reason to upgrade weakens.
What this is based on
Two fast local devices plus a constrained shared office crossed with remaining LAN rates after WAN. Actual transfer performance remains limited by the complete path.
Main trade-off
TP-Link Archer BE550
Two 5 GHz spatial streams, and no 10G connection.
TP-Link Archer BE400
- Choose it for
- Prioritize four-stream 5 GHz hardware when the supported workload calls for it.
- Use one 2.5G local device beside a 2.5G WAN without needing 6 GHz.
- Main trade-off
- No 6 GHz and only one multi-gigabit local socket.
TP-Link Archer BE550
- Choose it for
- Connect several compatible 2.5G local devices without another switch.
- Use the 6 GHz radio with a confirmed compatible laptop or other client.
- Main trade-off
- Two 5 GHz spatial streams, and no 10G connection.
About this comparison
Archer BE400 vs BE550 for a shared office. Compare a 2.5G NAS-and-computer path, 5 GHz stream trade-offs and why Archer is not Deco.
These Archer Wi-Fi 7 routers are credible midrange alternatives for a home moving beyond gigabit. BE400 emphasizes a larger dual-band radio, while BE550 adds 6 GHz and changes every local Ethernet socket to 2.5G.
Winner by situation
Start with what you need it to do
A fast NAS and computer without another switch
BE550 has four fast local sockets.
- TP-Link Archer BE400
- Caution
- TP-Link Archer BE550
- Better fit
A compatible device specifically needs 6 GHz
Only BE550 has that band.
- TP-Link Archer BE400
- Caution
- TP-Link Archer BE550
- Better fit
Four-stream 5 GHz is a verified requirement
BE400 provides the larger documented stream count on that band.
- TP-Link Archer BE400
- Better fit
- TP-Link Archer BE550
- Caution
Existing Deco units must become one Archer mesh
The mesh families are distinct.
- TP-Link Archer BE400
- Caution
- TP-Link Archer BE550
- Caution
What matters in practice
The differences that matter
A shared archive can justify BE550 even if no one owns a 6 GHz laptop
A 2.5G NAS and computer need two fast local sockets to connect directly at that link rate. BE400 supplies one after WAN, while BE550 supplies four. In a small office that already has a work dock, storage and entertainment cables, BE550 can avoid adding a separate multi-gigabit switch. The benefit comes from Ethernet, so it does not depend on anyone using 6 GHz. If the storage or computer is only gigabit, or a suitable switch already exists, this particular reason to upgrade weakens.
How we reached this conclusion
Two fast local devices plus a constrained shared office crossed with remaining LAN rates after WAN. Actual transfer performance remains limited by the complete path.
A newer laptop can gain a band while older devices see a different trade
BE550 adds 6 GHz, but its 5 GHz radio is 2x2 where BE400 is 4x4. That is not evidence that BE400 is faster in a particular home. It does mean a household of supported 5 GHz clients should not treat BE550 as a radio upgrade in every dimension. A compatible new laptop can use the added band, while older clients remain on their supported bands. Check the actual devices and workload. The wired port advantage is easier to establish than a promised wireless speed change.
How we reached this conclusion
One new compatible laptop plus retained older devices crossed with band availability and band-specific stream counts. No measured throughput comparison or universal capacity claim.
The far room can erase a same-brand reuse assumption
A buyer with existing Deco coverage in a bedroom or office cannot replace the main unit with either Archer and expect one unified mesh. TP-Link treats Archer EasyMesh and Deco as different systems. Before choosing on the LAN ports at the main desk, decide how the far room will remain connected and who will manage that configuration. Separate systems may coexist in a supported arrangement, but that is not the same as joining the old Deco units to the Archer mesh. Existing supported EasyMesh devices require their own revision and firmware check.
How we reached this conclusion
Remote-room dependence plus a plan to retain existing nodes crossed with mesh-family compatibility. Configuration burden and reuse are explicit rather than invented coverage benefits.
Choice A
TP-Link, Archer BE400
TP-Link Archer BE400
Prioritize four-stream 5 GHz hardware when the supported workload calls for it.
- Best matched use
- Prioritize four-stream 5 GHz hardware when the supported workload calls for it.
Checked facts
- Local connections: One 2.5G and three 1G.
- 6 GHz: No 6 GHz radio.
- 5 GHz streams: 4x4.
- Mesh family: EasyMesh, with model and firmware checks.
Choice B
TP-Link, Archer BE550
TP-Link Archer BE550
Connect several compatible 2.5G local devices without another switch.
- Best matched use
- Connect several compatible 2.5G local devices without another switch.
Checked facts
- Local connections: Four 2.5G.
- 6 GHz: 6 GHz radio included.
- 5 GHz streams: 2x2.
- Mesh family: EasyMesh, with model and firmware checks.
Meaningful differences
What changes the fit
| What changes | TP-Link Archer BE400 | TP-Link Archer BE550 | Why it matters |
|---|---|---|---|
| Local connections | One 2.5G and three 1G. | Four 2.5G. | BE550 changes the whole local socket mix. |
| 6 GHz | No 6 GHz radio. | 6 GHz radio included. | The client and software must also support the band. |
| 5 GHz streams | 4x4. | 2x2. | The extra band is not a stream-count upgrade on every existing band. |
| Mesh family | EasyMesh, with model and firmware checks. | EasyMesh, with model and firmware checks. | Neither is a Deco mesh node. |
What you give up
Every choice has a cost
If you choose TP-Link Archer BE400
- A fast computer-and-NAS pair needs another network arrangement.
If you choose TP-Link Archer BE550
- Existing Deco coverage cannot be reused as one Archer mesh merely by matching the brand.
Recommendation switch
The decision flips if...
Two or more fast wired devices need direct connections
Choose TP-Link Archer BE550. BE550 provides four 2.5G LAN sockets.
Four-stream 5 GHz matters and one fast LAN is sufficient
Choose TP-Link Archer BE400. BE400 supplies that radio configuration.
What matters in practice
Before you choose
Adding a radio band can help a new laptop while reducing the documented stream count on the band older devices use.
What this comparison cannot tell you
- No measured radio performance difference.
- No universal claim that four streams make one laptop faster.
- EasyMesh features depend on hardware and firmware.
What the facts say
What the comparison shows
Useful conclusions from the current Wi-Fi routers comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| TP-Link Archer BE400 |
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| TP-Link Archer BE550 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
TP-Link Archer BE400
Prioritize four-stream 5 GHz hardware when the supported workload calls for it.
Use one 2.5G local device beside a 2.5G WAN without needing 6 GHz.
See price & reviews on AmazonTP-Link Archer BE550
Connect several compatible 2.5G local devices without another switch.
Use the 6 GHz radio with a confirmed compatible laptop or other client.
See price & reviews on AmazonLinks open in a new tab.