Blueair Blue Pure 311i Max vs Coway Airmega AP-1512HH Mighty

Normally when one product costs twice as much, you expect it to win the comparison. Here, the Coway Mighty scores 88/100 versus the Blueair's 80/100 in consensus testing — while costing $100 to $150 less. That's not a close call. You're paying a premium for the Blueair's app and aesthetics, not for better allergy relief.

The Coway Mighty covers far larger spaces than similarly priced competitors — and that advantage holds against the Blueair too. For allergy sufferers, coverage area isn't a spec to skim past: an underpowered purifier in a large room is basically decorative. The Mighty actually cleans the air in the room you put it in.

The Blueair 311i Max has app connectivity for remote monitoring; the base Coway Mighty does not. If you want to check air quality from your phone, schedule purification cycles, or integrate with a smart home setup, the Blueair is the only option here. For most allergy sufferers, this is a nice-to-have — but for tech-forward households, it's a genuine differentiator.

The Blueair earned CNET's lab endorsement, which matters. But the Coway Mighty is both Wirecutter's top pick AND a Reddit community favorite — meaning it holds up not just in controlled testing but in thousands of real homes over years of use. That dual validation from experts and long-term owners is rare and hard to argue with.