Decoder analyzed more than 45,131 reviews to find which robot vacuums under $400 are loved by shoppers, and which ones standout based on the following important qualities:
- Cleaning Power
- Dustbin Capacity
- Edge Cleaning
- Pet Hair Removal
Read more about what factors to consider when shopping for robot vacuums in our buyer's guide.
Personalize Your Recommendation
Tell us about the problem you're trying to solve or the product you're looking for and our shopper assistant AI finds the perfect solution.
Overall, this is an amazing vacuum that is perfect for those with pets or hard to reach places in their home. It's efficient and does a great job of cleaning up even the most stubborn messes.
Rank based on 1,838 reviews
This affordable robot vacuum is great for hardwood floors and carpets, efficient at pet hair removal, and has a large dustbin capacity.
Rank based on 2,853 reviews
This robot vacuum is a powerful and efficient option for those with hardwood or tile floors, especially if you have multiple pets. Edge cleaning is amazing, and the large dustbin capacity means less frequent emptying required.
Rank based on 2,446 reviews
Overall, this is a great robot vacuum for those looking for an easy-to-use option with good suction power and efficient edge cleaning.
Rank based on 472 reviews
Overall, this robot vacuum is a great choice for those looking for a powerful and versatile machine.
Rank based on 3,663 reviews
The iRobot Roomba 675 is a great choice for those looking for a robot vacuum that can take care of the majority of the cleaning. However, it's not 100% efficient and still requires some manual sweeping and vacuuming.
Rank based on 1,041 reviews
The Roomba i7+ is a great vacuum for those looking for something that can do a thorough job of cleaning. However, the filter can't be taken out and cleaned and the dustbin capacity is good but you'll still need to use a regular vacuum at least once a week.
Rank based on 1,197 reviews
This robot vacuum is a great option for those who are looking for a powerful and efficient machine. The edge cleaning feature is particularly useful, and the large dustbin capacity is perfect for busy families or those with pets.
Rank based on 215 reviews
The iRobot Roomba 671 is a great robot vacuum with plenty of features to help make your life easier. It has great cleaning power and the self-emptying feature is definitely a plus. The mapping feature is also helpful in seeing where it has cleaned and where it still needs to clean. The only downside is the small dustbin capacity, but overall this vacuum is a great choice.
Rank based on 484 reviews
Oct. 4, 20222 3:02 p.m. PT
Decoder is a product recommendation engine that eliminates the guesswork of online shopping and finds the perfect product for your needs.
Planning to buy a robot vacuum?
When considering purchasing a robot vacuum, there are many factors to take into account such as price, features, and your specific cleaning needs. However, some of the most important aspects to look for are suction power, battery life, and self-cleaning abilities.
Suction power is important because it directly correlates to the vacuum’s cleaning performance. A higher suction power means that the vacuum will be able to pick up more dirt, dust, and debris. Battery life is also crucial because you want a vacuum that can clean for an extended period of time without needing to be recharged. Lastly, self-cleaning abilities are key for a robot vacuum because you want a unit that can clean itself after each use. This helps to ensure that your vacuum is always functioning at its best.