# iRobot Roomba Max 775 Combo vs iRobot Roomba Plus 405 Combo

As of Nov 4, 2026, the iRobot Roomba Max 775 Combo costs $1,000 and the iRobot Roomba Plus 405 Combo costs $800, so the iRobot Roomba Plus 405 Combo is $200 cheaper. Pick the iRobot Roomba Max 775 Combo for low maintenance hard floor cleaning. Pick the iRobot Roomba Plus 405 Combo for hard floor homes on a deep discount.

Prices checked Nov 4, 2026. HTML version: https://robotsforthat.com/vs/irobot-roomba-max-775-combo-vs-irobot-roomba-plus-405-combo/

## Side by side

| | iRobot Roomba Max 775 Combo | iRobot Roomba Plus 405 Combo |
|---|---|---|
| Price | $1,000 | $800 |
| 3 year cost | $1,100 | $800 |
| Our score | Not scored yet | Not scored yet |
| Rank in Floors | #84 | #74 |
| Status | on sale | on sale |
| Warranty | n/a | n/a |
| Suction | 30,000 Pa (Tom's Guide spec table); iRobot only says 4X the suction of the Roomba 105 Combo | iRobot claims 70x the suction of Roomba 600 series, with 4 levels; Vacuum Wars measured 0.13 kPa against a 0.83 kPa average |
| Navigation | ClearView Pro LiDAR with 3D mapping; about 9 min to map 1,000 sq ft, stores up to 5 maps | ClearView LiDAR, maps about 1,000 sq ft in 9 minutes and stores up to 4 maps (iRobot); Vacuum Wars measured 0.76 m2/min against a 0.70 average |
| Obstacle avoidance | PrecisionVision AI camera recognizes cords, shoes and pet waste; Gizmodo saw it drag a cable and get stuck under a child's bed | No obstacle avoidance sensors (Vacuum Wars); BestReviews saw it tangle on cords twice in one run |
| Mopping | Yes, PowerSpin roller mop at 200 RPM with PerfectEdge extension, heated spot mopping and a cover that flips over the roller on carpet | DualClean spinning pads at 200 RPM with SmartScrub and auto lift on carpet (iRobot); Vacuum Wars scored 145 on dried stains against a 93 average but found it left 5.20 g of water against a 1.01 g average |
| Self empty | Yes, into carbon odor control bags that iRobot says last about 3 months | Yes, bagged, up to 75 days based on one run per week (iRobot) |
| Dock features | AutoWash dock washes the roller with 167°F water, dries it at 122°F, dispenses StayClean solution and stores a spare bag | AutoWash dock empties the bin, washes and dries the pads and runs a self cleaning water cycle (iRobot); Vacuum Wars notes no hot water wash or hot air drying |
| Runtime | 180 min (Tom's Guide spec table); 6,000 mAh LFP battery | n/a |
| Dustbin | Onboard bin size not published; dock bag rated for about 90 days | 0.1 gal robot bin (Best Buy listing) |
| Height | 4.1 in robot; 17 in dock | 4.2 in; robot is 14.1 x 13.8 x 4.2 in and 9.06 lb (iRobot) |
| Pet hair | Dual rubber brushes; Tom's Guide measured 44% hair pickup on hardwood and 52% on carpet, while Xataka rated pet hair pickup excellent | Vacuum Wars measured 50% flattened pet hair pickup on carpet against a 66% average and 17% hair wrap; BestReviews saw 90% to 95% faux fur pickup on hard floors but under 50% on carpet |
| App | Roomba Home app with schedules, keep out zones, water flow and suction controls; Gizmodo found it buggy on long runs | Roomba Home app with routines, Clean Zones and Keep Out Zones; works with Alexa, Siri and Google Assistant (iRobot); Vacuum Wars and BestReviews called the app buggy or basic |
| Weight | 12.8 lb robot, 19.0 lb dock (iRobot) | n/a |
| Noise | n/a | Dock emptying measured 87.8 dBA by Vacuum Wars and 80 to 85 dB by BestReviews |
| Best for | low maintenance hard floor cleaning | hard floor homes on a deep discount |
| Skip if | you want a quiet robot | you have carpet, pets or cables on the floor |

## What reviewers found

### iRobot Roomba Max 775 Combo

- Gizmodo: Good vacuuming with no clogs and a streak free roller mop that handled ketchup about as well as rivals, but noisy, a buggy app on long runs, unreliable carpet detection and trapped twice under a bed. A full vacuum and mop of 750 sq ft took about 2.5 hours. [Source](https://gizmodo.com/irobot-roomba-max-775-review-a-respectable-roomba-redux-2000813995)
- Tom's Guide: Hard to recommend. Hardwood pickup of 44% hair, 86.5% Rice Krispies and 91% chia seeds; carpet 52%, 63.5% and 35%. Bumped walls often, scattered debris with its side brushes and left slight mop residue. [Source](https://www.tomsguide.com/home/home-appliances/roomba-max-775-combo-review)
- Xataka: Excellent pet hair pickup and effective hot water roller mopping; cleaned 55 m² in 40 minutes using 33% of the battery. Fixed side brushes made corners less thorough and bags and solution are costly. [Source](https://www.xataka.com/analisis/irobot-roomba-max-775-combo-analisis-caracteristicas-precio-especificaciones)

### iRobot Roomba Plus 405 Combo

- Vacuum Wars (1.66 Vacuum Wars stars): Measured 0.13 kPa suction and 10 CFM airflow against 0.83 kPa and 16 CFM averages, 58% carpet deep clean against 75%, 50% flattened pet hair against 66%, and 5.20 g of water left behind. Dried stain score of 145 beat the 93 average. Called it a letdown. [Source](https://vacuumwars.com/roomba-plus-405-combo-review-great-hopes-ok-results)
- BestReviews: Tested in a 1,000 sq ft two level apartment. Picked up 90% to 95% of faux fur on hard floors but under 50% on carpet, spread spilled water, tangled on cords twice in one run, and the dock measured 80 to 85 dB when emptying. Testers did not recommend it. [Source](https://products.ktla.com/articles/home/vacuums/irobot-roomba-plus-405)

## Questions buyers ask

### Which is better, the iRobot Roomba Max 775 Combo or the iRobot Roomba Plus 405 Combo?

Pick the iRobot Roomba Max 775 Combo for low maintenance hard floor cleaning. Pick the iRobot Roomba Plus 405 Combo for hard floor homes on a deep discount.

### Which is cheaper?

The iRobot Roomba Plus 405 Combo at $800, versus $1,000 for the iRobot Roomba Max 775 Combo, checked Nov 4, 2026. Over 3 years with running costs: $1,100 vs $800.

### What is the difference between the Roomba Max 775 Combo and the Roomba Plus 405 Combo?

Suction: 30,000 Pa (Tom's Guide spec table); iRobot only says 4X the suction of the Roomba 105… on the Roomba Max 775 Combo, iRobot claims 70x the suction of Roomba 600 series, with 4 levels; Vacuum Wars measured… on the Roomba Plus 405 Combo. Navigation: ClearView Pro LiDAR with 3D mapping; about 9 min to map 1,000 sq ft, stores up to 5 maps on the Roomba Max 775 Combo, ClearView LiDAR, maps about 1,000 sq ft in 9 minutes and stores up to 4 maps (iRobot)… on the Roomba Plus 405 Combo. Obstacle avoidance: PrecisionVision AI camera recognizes cords, shoes and pet waste; Gizmodo saw it drag a… on the Roomba Max 775 Combo, No obstacle avoidance sensors (Vacuum Wars); BestReviews saw it tangle on cords twice in… on the Roomba Plus 405 Combo.

Full reviews: [iRobot Roomba Max 775 Combo](https://robotsforthat.com/robot/irobot-roomba-max-775-combo/index.md), [iRobot Roomba Plus 405 Combo](https://robotsforthat.com/robot/irobot-roomba-plus-405-combo/index.md)