Robot Vacuums · Head to head

iRobot Roomba Plus 405 vs iRobot Roomba Plus 504

Full Robot Vacuums comparison in 2026

Updated August 2026
Data from Amazon and official iRobot site.
2026 verdict
iRobot Roomba Plus 405 wins the 2026 matchup against iRobot Roomba Plus 504, mainly on price, rating, and mopping functionality. Its clearest strengths are price, rating, and mopping functionality, and it still looks stronger on auto mop washing and auto mop drying. iRobot Roomba Plus 504 can still be the right pick, but only if battery life and integrations outweigh the wider strengths of iRobot Roomba Plus 405. For the average buyer, iRobot Roomba Plus 405 is the safer choice.
vs
FeatureiRobot Roomba Plus 405iRobot Roomba Plus 504Winner
Price$399.00$669.98iRobot Roomba Plus 405
Rating4.03.8iRobot Roomba Plus 405
Battery Life120 minutes210 minutesiRobot Roomba Plus 504
IntegrationsGoogle Home, Alexa, IFTTTGoogle Home, Alexa, Apple HomeKit, Home Assistant, IFTTT, MatteriRobot Roomba Plus 504
Mopping FunctionalityYESNOiRobot Roomba Plus 405
Auto Mop WashingYESNOiRobot Roomba Plus 405
Auto Mop DryingYESNOiRobot Roomba Plus 405
Warranty1 year1 yearTie
Auto RechargeYESYESTie
Connectivity2.4 GHz WiFi, 5 GHz WiFi2.4 GHz WiFi, 5 GHz WiFiTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie
Obstacle DetectionYESYESTie

Frequently Asked Questions

Which is better overall: iRobot Roomba Plus 405 or iRobot Roomba Plus 504?

iRobot Roomba Plus 405 has the stronger overall profile in this comparison, especially for price, rating, and mopping functionality.

What is the biggest difference between iRobot Roomba Plus 405 and iRobot Roomba Plus 504?

Price is one of the clearest differences: iRobot Roomba Plus 405 lists $399.00, while iRobot Roomba Plus 504 lists $669.98.

Which one looks better on price?

iRobot Roomba Plus 405 is listed at $399.00, while iRobot Roomba Plus 504 is listed at $669.98. iRobot Roomba Plus 405 (better spec).

Who should buy iRobot Roomba Plus 405?

Choose iRobot Roomba Plus 405 if your priority is price and rating and that matters more than battery life.

Who should buy iRobot Roomba Plus 504?

Choose iRobot Roomba Plus 504 if your priority is battery life and integrations and that matters more than price.

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