Britax Poplar vs. UPPAbaby Knox: Which is Better? (2024)

Hi there! We're here to help you decide between the Britax Poplar and the UPPAbaby Knox.

Our goal is to provide you with the information you need to feel confident that you're choosing the optimal car seat for your family's needs and budget. Let us know if you have any other questions!

At A Glance

Our Thoughts

The Britax Poplar and the UPPAbaby Knox are two convertible car seats that are known for their quality and distinct sets of features. They both accommodate children from infancy through toddlerhood, but their similarities pretty much end there.

The Britax Poplar shines with its easy installation, thanks to its widely praised ClickTight system. This car seat also stands out with its slim profile, which makes it an optimal choice for compact cars. The Poplar offers an impressive extended rear-facing support up to 50 pounds, allowing your child to remain in the safer rear-facing orientation for a longer period. On the other hand, some users report that the headrest lacks padding, which might slightly compromise comfort during naps, and it's of a considerable weight, potentially making it less convenient if frequently transferred between vehicles.

In contrast, the UPPAbaby Knox offers luxury and style with integrated Koroyd technology and Side Impact Pods for enhanced safety. The Knox car seat is also equipped with a convenient chest clip featuring a one-button release, making it easier for parents to fasten and unfasten. However, it seems to lag behind when it comes to ease of installation, with many parents reporting difficulty on this front. The Knox, with its rather bulkier build, may not be suitable for those with smaller vehicles or those needing to fit multiple car seats. Moreover, it only supports rear-facing up to 45 pounds, which is lower than the Poplar.

Despite some minor shortcomings, both of these products have earned FAA approval for both the rear and forward-facing modes, allowing for secure travel with little ones. They also both have a lifespan of 10 years before expiration, providing long-term value for parents.

Between these two, if ease of installation, a slimmer design, and extended rear-facing weight limit are your significant considerations, the Britax Poplar would be the recommended choice. It has proven to offer a good balance between quality and cost. However, if your preference leans more towards enhanced safety features and a premium feel, and your vehicle space allows, the UPPAbaby Knox might be the one for you, albeit at a higher cost. Both seats make good investments towards your child's safety and comfort—choose one that aligns best with your family's specific needs and constraints.