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Case S21 Ultra Comparison - October 2025
| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3  9.6Exceptional | 4  9.5Excellent |
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ModelOtterBox for Samsung Galaxy S21 Ultra 5G, Superior Rugged Protective Case, Defender Series, Black | Model OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY - Does NOT FIT Non-Plus or Plus Sizes) - Black | Model Crave Dual Guard for Galaxy S21 Ultra Case, Shockproof Protection Dual Layer Case for Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8 inch) - Forest Green | Model for Samsung Galaxy S21 Ultra Case with Camera Lens Cover HD Screen Protector,Military-Grade Drop Tested Magnetic Ring Holder Kickstand Protective Phone Case for Samsung Galaxy S21 Ultra 5G (Navy Blue) |
BrandOtterBox | Brand OtterBox | Brand Crave | Brand M MAIKEZI |
Reviews | Reviews | Reviews | Reviews  |
Tech Specs | |||
product dimensions8.5 x 4.5 x 1.5 inches | product dimensions - | product dimensions 0.67 x 3.46 x 6.77 inches | product dimensions 6.8 x 0.5 x 3.4 inches |
colorblack | color - | color Forest Green | color Navy Blue with camera cover Military-Grade 2nd gen |
other display featuresWireless | other display features - | other display features Wireless | other display features Wireless |
form factorBasic Case | form factor - | form factor Bumper | form factor Bumper |
item weight5.1 ounces | item weight - | item weight 6.4 ounces | item weight 3.84 ounces |
special featuresShock-Absorbent | special features - | special features Camera Protector, Shock-Absorbent | special features built-in metal magnetic sheet can be directly stably attached to the magnetic car phone mount., with hidden stand works perfectly both in vertical and horizontal stable stand angles.Convenient for reading, watching movies, playing games, and face-time with your friends., Military Grade Second generation Drop Protection, Sliding camera slide cover, Upgraded Anti-Scratch Sliding Camera Protection., Built-in 360 Rotable Kickstand, no need to buy another popsocket. |
customer reviews4.7 4.7 out of 5 stars 1, 096 ratings 4.7 out of 5 stars | customer reviews - | customer reviews 4.4 4.4 out of 5 stars 3, 865 ratings 4.4 out of 5 stars | customer reviews 4.3 4.3 out of 5 stars 455 ratings 4.3 out of 5 stars |
Review | Review - | Review - | Review - |
Available On  | Available On  | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1OtterBoxOtterBox for Samsung Galaxy S21 Ultra 5G, Superior Rugged Protective Case, Defender Series, Black
Why we love it
Compatible with S21 Ultra.
Latest phone model.
Secure fit.
Main highlights- Premium Rugged Design: Clean lines and a rugged grip have you covered for optimal form and function for your S21 Ultra, port covers keep out dust and debris
- Includes OtterBox limited lifetime warranty (see website for details)
- Hands-Free Functionality: The included detachable belt clip holster doubles as a kickstand for hands-free viewing
- Drop+ 4x as many drops as military standard (Mil-Std-810g 516.6) works with wireless and MagSafe charging pads (no magnets in case)
- Compatibility: OtterBox Defender Case for Samsung Galaxy S21 Ultra 5G (Not Compatible with S21, FE, Plus models)
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9.7
2OtterBox
OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY - Does NOT FIT Non-Plus or Plus Sizes) - Black
Why we love it
Exceptional protection against drops and impacts.
Slim design fits easily in pockets.
Limited lifetime warranty for peace of mind.
Main highlights- Trusted OtterBox Quality: With OtterBox, you're not just buying a case; you're investing in peace of mind. Our limited lifetime warranty covers material and workmanship defects, guaranteeing quality and exceptional customer service.
- Thin profile slips in and out of pockets with soft inner and hard outer layers absorb and deflect impacts, open access to ports and speakers
- Lasting antimicrobial technology helps protect case exterior against many common bacteria *Helps protect the case exterior against many common bacteria. It does not protect you or the screen.
- Compatible with Galaxy S21 Ultra 5G (ONLY - DOES NOT FIT non-Plus or Plus sizes)
- Case is infused with silver-based additive that continually blocks microbial growth
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9.6
3Crave
Crave Dual Guard for Galaxy S21 Ultra Case, Shockproof Protection Dual Layer Case for Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8 inch) - Forest Green
Main highlights- Tactile buttons provide a crisp and distinct press
- Premium protection from drops and scratches
- Designed for Samsung Galaxy S 21 Ultra, S21 Ultra 5G (6.8")
- Compact profile allows easy grip and happy pockets
- All Crave cases have a lifetime warranty
Our ranking system
At BestChoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.
Features
Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
Consumer Reviews
We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
Popularity
Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
![Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black)](https://d1ttb1lnpo2lvz.cloudfront.net/b865b2ac/loader.svg)
