ASUS RT-AX55 AX1800 WiFi 6 Router vs TP-Link Archer AX21 WiFi 6 Router
Specs compared
| Spec | ASUS RT-AX55 AX1800 WiFi 6 Router | TP-Link Archer AX21 WiFi 6 Router |
|---|---|---|
| Capacity | nullGB | nullGB |
| Interface | WiFi 6 (802.11ax) | WiFi 6 (802.11ax) |
| Form Factor | Router | Router |
| Read Speed | — | — |
| Write Speed | — | — |
| Endurance | — | — |
| Warranty | 3 years | 2 years |
| Value Score | 89.8 | 86.8 |
| Price / TB | $0.00/TB | $0.00/TB |
| Current Price | $109.99 | $47.95 |
Which one should you buy?
ASUS RT-AX55 AX1800 WiFi 6 Router
Choose the ASUS RT-AX55 if you want AiMesh compatibility to expand into a multi-node system later — add any ASUS AiMesh router as a satellite node without replacing this unit.
TP-Link Archer AX21 WiFi 6 Router
Choose the TP-Link Archer AX21 if you want the best value WiFi 6 router under $60 — TP-Link's firmware is reliable and the AX21 consistently tops value rankings at this price point.
What the spec table doesn't show
Both routers are dual-band WiFi 6 (AX1800) with near-identical theoretical throughput. The meaningful difference is ecosystem: ASUS AiMesh lets you pair any AiMesh-compatible ASUS router as a satellite node, creating a managed mesh system. TP-Link's equivalent (Deco mesh) requires dedicated Deco hardware — the Archer AX21 cannot join a Deco mesh network. For renters who might move to a larger space, ASUS's expandability is a longer-term investment.
Verdict
For pure value at the budget WiFi 6 tier, TP-Link Archer AX21 is the best-in-class pick. If there's any possibility of needing mesh coverage in the future and you want to reuse this router as part of a larger network, ASUS RT-AX55's AiMesh support is worth the modest premium.
Zoltan LukacsiUpdated June 23, 2026