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  Source: Ringke

  Ringke Fusion X for Galaxy S23 Ultra
  

  Best overall

  The Ringke Fusion X is perfect for people who want adequate impact protection without making the Galaxy S23 Ultra unbearably heavy or thick. The bumpers on all four corners ensure that the kinetic energy from drops is negated to keep your phone free of damage. The only downside is the small lip around the display. It’ll stop scratches but won’t help much if the phone has a hard drop face down.

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  Source: UAG

  UAG Monarch for Galaxy S23 Ultra
  

  Premium pick

  $21 $45 Save
  $24

  The UAG Monarch is not a practical purchase. It’s expensive and tries to justify that cost with exceptional build quality. We love how this case looks and feels, and it doesn’t lack in the protection department. The case can withstand any hard drop or knock, surviving drop tests of up to 25 feet. To top it off, a magnet in the case makes your Galaxy S23 Ultra compatible with MagSafe chargers and accessories.

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  Source: Caseborne

  Caseborne V for Galaxy S23 Ultra
  

  Best value

  The Caseborne V is built Texas tough, surviving drops of 21 feet, exceeding the requirements for military specification. The kickstand can support the phone in portrait and landscape, although it isn’t quite as sturdy as the ones on the Supcase UB Pro. A strong lip surrounds the front of the phone, helping negate display scratches even without a screen protector. And the lifetime warranty that can be activated once the case arrives makes this case stand out from the rest.

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  Source: i-Blason

  i-Blason Cosmo Series for Galaxy S23 Ultra
  

  Promoted pick

  In partnership with i-Blason

  The i-Blason Cosmo is one of our favorite cases for good reason. The protection is excellent due to the dissipating kinetic energy, and the built-in screen protector ensures the display is kept scratch-free. The best part is the way it looks. The Cosmo goes above and beyond to stand out in a sea of black TPU rectangles. We love it because there are plenty of designs to choose from, with our favorite being the Swirl, seen in the photo here.

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  Source: Spigen

  Spigen Tough Armor for Galaxy S23 Ultra
  

  Spigen’s Tough Armor lives up to its name thanks to its dual-layer construction. The hard plastic shell sits atop a soft TPU inner layer, and combined, they absorb hard knocks and drops without the S23 Ultra taking any damage. The plastic shell feels comfortable, and the case isn’t too thick despite being so tough. The one area we’ve often marked Spigen down is color choices, but that’s changing for the better.

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  Source: Poetic

  Poetic Neon for Galaxy S23 Ultra
  

  Heavy-duty cases are bulky, making the already-large Galaxy S23 Ultra unwieldy. The Poetic Neon exists as a middle ground between normal and extreme. While remaining slim, the Poetic Neon is made up of two layers, so it can deal with almost any damage. In terms of protection, the only thing lacking is a port cover, but if you use wired Android Auto or charging, that could be a good thing as it won’t place any additional strain on your cables.

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  Source: Supcase

  SUPCASE UB Pro for Galaxy S23 Ultra
  

  Promoted pick

  In partnership with Supcase

  The Supcase UB Pro has built a reputation as one of the best heavy-duty cases on the market and is well-earned. The case uses a dual-layer construction to absorb any damage and keep your Galaxy S23 Ultra safe. The addition of port covers and one of the best kickstands we’ve ever used completes the package. You can buy this case with or without a built-in screen protector, and we’ve selected the one without it. A glass one is always better.

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  Source: Spigen

  Spigen Cryo Armor for Galaxy S23 Ultra
  

  Spigen’s Cryo Armor is a unique and understating offering that feels comfortable in hand. Also, the vented backplate allows the case to passively pull heat out of the phone and dissipate it into the atmosphere. That’s what the marketing says anyway; we’re not entirely sure how effective this is when gaming. Thankfully these vents look cool, and the case does a stand-up job keeping your phone safe from a drop or impact.

• VRS Damda Glide Hybrid for Samsung Galaxy S23 Ultra Case
  

  Available in black or green, the VRS Damda Glide Hybrid encases your Galaxy S23 Ultra in a tough bedding of TPU, ensuring you’ll never have to worry about dropping your mobile ever again. We’re also big supporters of the precision cutouts on this model, which add an extra bit of defense for the S23 Ultra’s camera lenses and ports. But our favorite element is the built-in wallet that can hold up to four cards and includes a sliding shield.

• Mozoter Case for Samsung Galaxy S23 Ultra
  

  Rocking military-grade drop protection, the Mozoter Case is designed to let your Galaxy S23 Ultra take a tumble from heights of around 12 feet. That’s thanks in part to the case’s hard-shelled PC backing and cushioned TPU inner-layer. The Mozoter also comes with two tempered glass camera lens protectors and a silicone hand-strap that can be easily attached and detached from the back of the case.

• Tongate Case for Samsung Galaxy S23 Ultra
  

  With seven different colors to choose from, this Tongate case comes with a built-in slider that protects the S23 Ultra’s lenses from dirt and dings when not in use. This is also one of the tougher cases for the S23 Ultra, thanks to the hard PC back cover, soft TPU edges, and the hard front frames with (or without) the integrated screen protectors. We’re also big fans of the fully-rotatable belt clip.

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  FNTCase for Samsung Galaxy S23 Ultra
  

  When you need to combine style with top-notch defense, look no further than the formidable FNTCase brand. This awesome Galaxy S23 Ultra case comes in 14 different colors, includes a sliding shield for the camera lenses, and even includes a built-in kickstand that can be used for both portrait and landscape viewing.

Which case is right for you?

What makes a heavy-duty case so strong? For starters, you need tough but flexible core materials that will allow your S23 Ultra to take a fall or big ding. Padded edges and soft linings act as airbags for the device, while the rock-solid outer shell absorbs the brunt of the impact, along with any scratches or scuffs that would have reached the phone.

The cases that offer the best protection are usually the biggest for one reason: physics. The case needs to dissipate the energy created by a harsh impact around the phone to protect your S23 Ultra. So the more materials you have, the more protection.

Our best overall pick is the Ringke Fusion X. The S23 Ultra is already a big phone, and the fact the Fusion X can offer this much protection while remaining relatively slim is impressive. The bumpers on each corner will protect your S23 better than any other case this small, and it’s comfortable to hold, too.

The UAG Monarch is a ridiculous case at full price, but we can’t help but love it. Living up to the regality of the Monarch name, this case looks gorgeous and is built like a luxury car. Combined with support for magnetic accessories and the kind of protection that would keep it safe through a nuclear blast, you get an expensive case that’s perfect for people who want the best.

The Caseborne V is our pick for the best value, and it’s easy to see why. It offers similar protection to more expensive models, a decent kickstand, and a design that looks good and feels as comfy as possible for a case this size. The best part, though, is the lifetime warranty. Caseborne is so confident in its product that they will bet you can’t break it.

If your needs are a little less defense-centric, we also have a roundup of the best regular Samsung Galaxy S23 Ultra cases. These include options that may emphasize style over top-of-the-line defense, which might check more boxes for the casual smartphone user. Oh, and no matter what kind of case you get, a screen protector is never a bad idea.