Cybex car seats - how do they compare?

Cybex car seats can be confusing, as many have very similar names aside from a different letter. Here we give a rundown of the brand's most popular car seats, plus our full reviews to make sure you're picking the right seat for your child.  

We've currently got 16 Cybex car seat reviews on our website (although some are versions of the same seat tested with and without an isofix base). 

Of those 16 reviews, five are Best Buys – that's 31%, which is a good ratio for the brand.

Head straight to child car seats to see all our reviews, news and advice. Or see our round-up of the best baby and child car seats for 2026

Which Cybex car seats have we tested?

Cheapest Cybex car seat - Cybex Solution G2, £155

The cheapest Cybex car seat on the Which? website is the Cybex Solution G2. It retails for £155 (although you may find at an even cheaper price).

Installed with the vehicle seatbelt and isofix connectors (if your car has them), the Cybex Solution G2 is approved for children measuring 100-150cm tall, which is aged four to 12 years. It was launched in Dec 2024.

Read our review of the Cybex Solution G2 to see what we thought of it.

Cybex i-Size baby car seats

Cybex Cloud G i-Size + Base G, £395

Launched in 2023 and tested last year, the Cloud G i-Size is an i-size infant carrier approved for use with babies measuring 40cm to 87cm, which is from birth to around 18 months.

The Cloud G is part of a modular car seat, as the Base G Isofix base can be used with the Sirona G i-Size toddler car seat.

Read our review of the Cybex Cloud G i-Size + Base G to see if it performs well in our crash tests and other lab-based tests.

Cloud T i-Size + Base T, £429

Newly released this year, the Cybex Cloud T is an infant carrier approved for use from birth up to around 15-18 months old (87cm).

We've tested it with the Cybex Base T, a rotating isofix base that lets you turn the seat towards you. This makes it easier to click the seat on or off the base and get your child out of the car without straining your back.

Find out how this car seat did in our tests by reading the full Cybex Cloud T i-Size + Base T review. You can also read our review of the Cloud T i-Size (belted) to see how it fares when installed without the isofix base.

Aton B2 i-Size + Base One, £234

The Aton B2 has been tested with a different base and is the newer version of the Aton B range. 

It's installed via a base but you can also strap it in using the vehicle's three-point seatbelt. The seat has a sun canopy that the manufacturer claims provides UPF50+ protection.

Read our review of the Aton B2 i-Size + Base One to find out if it scores well in our tests, which check for safety, ease of installation and comfort. We've also tested it without the base. Read the Cybex Aton B2 i-Size (belted) review.

Cybex i-Size baby to toddler car seats

Some car seats are classed as 'baby-to-toddler' seats, while others are 'toddler-to-child' seats. This will depend on the starting height or weight suitability of the seat. 

If the seat can be used from birth or three months to around four years old, it's a baby-to-toddler seat. If it's approved from around a year, we call it a toddler-to-child seat.

Sirona G i-Size + Base G, £425

The Cybex Sirona G i-Size + Base G is a baby-to-toddler car seat approved for use when your baby measures 61cm to 105cm, which is around one to four years.

It’s installed via an isofix base with a support leg, which the seat clicks into. The car seat and base are separate parts and part of a modular system, which lets you click on the Cybex Cloud G i-Size infant carrier onto the same base.

Read our review of the Sirona G i-Size + Base G to find out how it scores.

Sirona Gi i-Size, £220

The Cybex Sirona Gi i-Size is a toddler-to-child car seat approved for use when your baby measures 61cm to 105cm, which is around one to four years.

It’s installed via Isofix connectors and a support leg in approved cars. The seat has a swivel function, and it comes as one piece rather than as a modular set like the above model. This means it could feel quite heavy if you're moving it between cars regularly.

Read our review of the Cybex Sirona Gi i-Size to find out how it performs in our crash tests, as well as ease of use and comfort checks.

Sirona T i-Size + Base T, £480

Launched in 2023, the Sirona T is a reversible child car seat approved for children from birth up to 105cm in height (around four years old). Once, it's an extended rearward-facing model and can be rotated on the base.

Will this baby-to-toddler car seat be simple to install and safe in a crash? Read our full review of the Sirona T i-Size + Base T to find out.

Sirona Z2 i-Size + Base Z2, £560

This baby-to-toddler car seat can detach from the base Z2, which is also compatible with the Cybex Cloud Z2 infant carrier. This means it's a modular system and can help you save money as you won't need to buy a second base when you move from the baby car seat to the toddler model.

The Sirona Z2 has a height-adjustable headrest, integrated side-impact protection, a removable newborn-inlay cushion and a magnetic belt holder to keep the harness straps out of the way when you're putting your child in the seat.

Read our review of the Sirona Z2 i-Size + Base Z2 to find out if it will protect your baby in a crash and is simple to install.

Pallas G i-Size, £220

This car seat is approved for children measuring 76-150cm tall, which is around 15 months to 12 years. This is an older age range than the models above, and so it's considered a toddler-to-child seat.

It uses an impact shield rather than a harness for children up to 105cm tall. Once your child exceeds this height limit, you can strap them into the seat using the vehicle's seatbelt. Some children don't get on well with impact shields, so it's a good idea to try the seat in a shop and take your child with you to make sure they're happy when strapped in.

To find out if this toddler seat is safe and comfortable, read our Pallas G i-Size review.

Confused about car seat laws? Read our guide to child car seat laws in the UK

Cybex i-Size child car seats

When talking about i-Size child car seats as an age group or stage of car seats, we mean seats suitable from when your child measures around 100cm in height (four years old). For older seats, approved to R44 regulations, this means group 2/3 seats.

Solution T i-Fix, £175

This child car seat is approved for children measuring 100-150cm tall, which is around aged four to 12 years.

It's available in a range of colours including black, grey, blue, white, pink and beige.

Read the Cybex Solution T i-Fix to find out if it's safe and easy to install.

What are the benefits of an extended rear-facing baby car seat?

Cybex multi-group car seats

For car seats approved to R129 regulations, these are often classified as i-Size baby-to-child seats. For older car seats, they would be classed as group 1/2/3 car seats. They cover a large age range, often from baby or toddlerhood right up until your child no longer needs a child car seat.

Anoris T2 i-Size, £640

The Cybex Anoris T2 is the successor to the Anoris T, and launched in 2024. 

It's approved for babies and children measuring 76cm to 125cm and is a 10cm increase in size range from the original Anoris. As this is an R129-approved seat, we wouldn't recommend using the seat until your child is at least 15 months old (around 87cm tall), as it's forward-facing only.

It's installed into your vehicle with isofix connectors and a support leg. Your child is restrained by an impact shield, as in the original Anoris.

Read the review of the Anoris T2 i-Size to see if it performs as well as the original Anoris.

Anoris T i-Size, £440

The Cybex Anoris T i-Size is a unique child car seat because it has an airbag stored in the impact shield, which is designed to protect your child in a crash. 

It's approved for children measuring 76-115cm tall, which is roughly 12 months to six years. 

Read our full review of the Anoris T i-Size car seat to find out more.

How we test child car seats - unlike some other websites that publish reviews, we fully crash-test each child car seat and carry out fitting checks with a panel of parents