TP-Link Archer AX21 vs TP-Link Deco X55

The TP-Link Archer AX21 wins this comparison on price, the only category where the two are not tied; owner rating and warranty come out identical for both. The TP-Link Deco X55 counters with more Wi-Fi throughput and mesh expandability, so buyers who need to cover a larger home may still prefer paying more for it.

The TP-Link Archer AX21 is a single-unit Wi-Fi 6 router, while the TP-Link Deco X55 is a mesh system built from multiple nodes that spread signal across a home. That makes the Deco X55 the easier upgrade for larger or multi-story houses, and the Archer AX21 the simpler, cheaper choice for a single-router setup.

The TP-Link Deco X55 has a higher combined Wi-Fi ceiling at 3 Gbps (574 Mbps on 2.4 GHz, 2402 Mbps on 5 GHz) versus the TP-Link Archer AX21's 1.8 Gbps (574 Mbps and 1201 Mbps). Neither supports a 6 GHz band or Wi-Fi 7.

Yes. The TP-Link Archer AX21 and the TP-Link Deco X55 both offer a separate IoT network alongside the main and guest Wi-Fi, so smart home devices can be isolated from personal devices on either system.

Buyers replacing an ISP gateway in an apartment or small, single-story home who want the cheapest way into Wi-Fi 6, plus router-level VPN and parental controls, should buy the TP-Link Archer AX21.

Buyers covering a larger or multi-story home who want expandable mesh coverage and a higher Wi-Fi throughput ceiling, and who value TP-Link's Deco app, should buy the TP-Link Deco X55.