iRobot Roomba Plus 405 Combo vs iRobot Roomba Plus 415 Combo

The iRobot Roomba Plus 415 Combo is the better robot vacuum overall, rated 3.9 to 3.4. The iRobot Roomba Plus 415 Combo leads on mopping. The iRobot Roomba Plus 405 Combo wins on value. The iRobot Roomba Plus 405 Combo costs $99.01 less ($499.99 vs $599).

Higher rated

iRobot Roomba Plus 415 Combo

#85 in Self-cleaning dock3.9Full review

A low-profile entry to iRobot’s self-washing mop docks for hard-floor homes; the Plus 515 adds hot-water washing for a little more.

Amazon $599

$599

iRobot Roomba Plus 405 Combo

#103 in Self-cleaning dock3.4Full review

Suits large, mostly hard-floor homes that want a self-washing mop dock from a familiar brand; weak carpet and pet hair results make it a poor fit for rugs and pets.

Amazon $499.99

$499.99

Prices were last checked October 27, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Choose the iRobot Roomba Plus 415 Combo for mopping (Dual spinning pads, lifts 10 mm, extends to edges vs Dual spinning pads).
Choose the iRobot Roomba Plus 405 Combo for value ($500 vs $599).

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.

Factor weight	iRobot Roomba Plus 415 Combo	iRobot Roomba Plus 405 Combo
Overall rating	3.9/5	3.4/5
Cleaning 30%	48 not yet tested; estimated from 3 tested iRobot robots and the median of the 70 tested robots	11 measured 58% of sand from carpet, 49.5% of pet hair, some hair tangled (0.2)
Value 25%	67 $599	78 $500
Dock 20%	100 Self-empties the bin, washes the mop, hot-air mop drying	87 Self-empties the bin, washes the mop
Navigation 15%	65 LiDAR	65 LiDAR
Mopping 10%	76 Dual spinning pads, lifts 10 mm, extends to edges	56 Dual spinning pads

Independent tests

iRobot Roomba Plus 415 Combo

No independent test published yet.