iRobot Roomba j9+
No lab has tested it yet, so it is not in our ranking.
- 3.4 inRobot heightlower than 6 of 8
Is the iRobot Roomba j9+ right for your home? Find out in 7 questions →
Before you buy, compare it with 2 recommended alternatives
Beside it, two models on sale today that come closest to it on score and price, with the same kind of station where we have them.
Green is the best of these 3, also when they share the lead.
| This model iRobot Roomba j9+ Best on 1 fact | Higher score, 62% cheaper Roborock Q10 S5+ Best on 2 facts | Higher score, 58% cheaper Dreame D20 Plus Best on 4 facts | |
|---|---|---|---|
| Price and ranking | |||
| Lowest price | $730Amazon.com | $279Amazon.com best | $309Amazon.com |
| Score | not in our ranking | best | |
| Rank | – | rank 2 of 13 with a self-emptying station | rank 1 of 13 with a self-emptying station |
| Customer rating | ★ 3.4 · 1,321 reviews | ★ 4.0 · 20,548 reviews | ★ 4.2 · 3,667 reviews best |
| Mopping | |||
| Mop type | no mop | flat or vibrating pad | flat or vibrating pad |
| Mop lift on carpet higher is better | – | 0.3 in (8 mm) | – |
| Automatic mop detach | – | no | – |
| Washes the mop | – | no | no |
| Hot-air drying | – | no | – |
| Station | |||
| Station same on all | self-emptying station | self-emptying station | self-emptying station |
| Dust bag lasts longer is better | up to 60 days | up to 49 days | up to 150 days best |
| Plumbing hookup | – | no | – |
| Brush and obstacles | |||
| Anti-tangle brush | – | yes | yes |
| Obstacle avoidance | AI camera | 3D sensor (structured light) | – |
| Climbs thresholds up to higher is better | 0.6 in (16 mm) | 0.8 in (20 mm) best | 0.8 in (20 mm) best |
| Climbing system for high thresholds | – | no | – |
| Size, noise and age | |||
| Robot height lower is better | 3.4 in (8.6 cm) best | 3.9 in (9.9 cm) | 3.8 in (9.7 cm) |
| Noise not judged | – | 65 dB | – |
| On the market since | September 2023 | February 2025 | – |
Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.
Prices per store
On October 3, 2026 the lowest price for the iRobot Roomba j9+ is $730 at Amazon.com, shipping to the United States included.
All prices include shipping to the United States. Sales tax is added at checkout. We may earn a commission when you buy through these links. It never changes our ranking.
| Store | Color | Price | Delivery time and returns | Reviews | Checked | Link to the store |
|---|---|---|---|---|---|---|
 Amazon.com blacklowest price | black | $730lowest price since Aug 25: $699 | about 1–5 dayslowest price | ★ 3.4 (1,321) | 4 hours ago | Visit store ↗ |
Price history
iRobot Roomba j9+ specifications
The numbers that matter first, then every fact by group. As published by the maker or the store we read it from.
iRobot · on the market since September 2023
Consumables: a 2.5 l dust bag in the station, which lasts up to 60 days.
Dimensionsrobot and dock
From the published dimensions. The robot passes under furniture with 3.5 in of clearance or more. The dock needs a spot 12.2 in wide and 15.8 in deep.
Suction and brushes 1 fact
- Dirt detection
A sensor notices where more dirt lies, at the doormat for example, and the robot cleans that patch longer or a second time.
- yes
Mopping 1 fact
- Mop type
How the mop is built: flat pads, two spinning discs or a roller. Discs press harder on dried-on dirt, a roller rinses itself while it works.
- no mop
Dock 5 facts
- Empties the dust bin
The dock empties the robot’s dust bin, usually after every run. You only empty the dock’s bag or bin.
- yes
- Bagless
The dock collects dust in a bin instead of a disposable bag. No bags to buy, but you empty it yourself.
- no
- Dust bag capacity
How much the dust bag in the dock holds.
- 2.5 l
- Dust bag lasts
How long the maker says a dust bag lasts with daily use. With pets or a lot of carpet it is shorter.
- up to 60 days
- Dock size (w × d × h)
The width, depth and height of the dock. Measure the spot you have in mind, and leave room for the lid and for the robot driving in.
- 12.2 × 15.8 × 13.3 in (31 × 40.1 × 33.8 cm)
Navigation and obstacles 5 facts
- Navigation
How the robot maps your home and follows that map. Lidar measures with a laser and works in the dark, a camera looks along and recognizes more.
- camera
- Obstacle avoidance
How the robot sees loose things on the floor, such as cables, socks or a pet accident. A camera with depth sensing sees more than a bumper that reacts on contact.
- AI camera
- Climbs thresholds up to
The highest threshold the robot takes, as the maker states it. Measure your own: the step into a bathroom or onto a balcony is often higher.
- 0.6 in (16 mm)
- Camera on board
Whether the robot has a camera, and what for: to recognize obstacles, or also to show you a live picture of your home in the app.
- obstacle camera
- Avoids pet waste
The maker says the robot recognizes a pet accident and drives around it, so it does not smear it across the floor. This is the maker’s claim, not a test of ours.
- yes
Robot 4 facts
- Robot height
How tall the robot is. It decides whether it fits under your sofa, bed or cabinet.
- 3.4 in (8.6 cm)
- Robot diameter
How wide the robot is. Narrower gets between chair legs more easily, wider usually means a bigger dust bin.
- 13.7 in (34.8 cm)
- Robot weight
What the robot weighs. It counts most if you carry it up a staircase every day.
- 9 lb (4.07 kg)
- Dust bin in the robot
How much dust the robot holds before you empty it. It matters less with a self-emptying dock, which empties the bin after every run.
- 400 ml
Battery 1 fact
- Runtime per charge
How long the robot cleans on one charge, at its quietest setting. After that it recharges and carries on where it stopped.
- 175 min
Smart features and warranty 2 facts
- Voice assistants
Which voice assistants the robot works with, such as Google Assistant or Alexa.
- Alexa, Google Assistant, Siri
- Home Assistant
Whether the robot works with Home Assistant, the home automation software you run yourself. Official means the integration comes with Home Assistant itself, community that volunteers maintain it.
- official integration
Sources: irobot.com · vacuumwars.com · amazon.com · homesupport.irobot.com · home-assistant.io
