If you have carpet, pets, or a home with corners and edges, yes—you need both. Without a side brush, dust collects in corners; without a roller brush, you lose deep cleaning power. However, homes with only hard floors might work fine with just a roller brush.How much does a robot vacuum cost without a side brush?

Vacuums without a side brush typically cost $100–150 less than dual-brush models. However, most mid-range vacuums ($300–600) include both brushes as standard, so the price difference is often smaller than you’d expect.Which robot vacuums have roller and side brushes

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