Keurig K-Express Single-Serve vs Ninja Single Serve Coffee Maker PB051

The verdict

Keurig K-Express Single-Serve is the better buy on our scoring, 6.2 to Ninja Single Serve Coffee Maker PB051's 5.7. It leads on capsule system & choice and ease of use & speed.

Who each one suits

Keurig K-Express Single-Serve

One person, one mug, the least you can spend to get there

Scores higher on capsule system & choice, ease of use & speed, machine value for money.

Ninja Single Serve Coffee Maker PB051

Pod convenience with four brew styles and an iced setting that is not just brewing over ice

Scores higher on drink quality, build quality & reliability, maintenance & cleaning.

How they score, criterion by criterion

Both are scored the same way against the rest of their category, from what their makers publish. The weight is how much each criterion moves the total. How the score works

CriterionWeightKeurig K-Express Single-ServeNinja Single Serve Coffee Maker PB051
Drink Quality18%4.75.3
Capsule System & Choice16%10.08.5
Running Cost Per Cup16%5.55.5
Ease of Use & Speed12%6.25.0
Build Quality & Reliability12%4.55.0
Waste & Disposal10%3.03.0
Machine Value for Money8%10.05.0
Maintenance & Cleaning8%5.06.9

What each one costs

Price$69.99Not publicly stated

Where they differ

Every specification the two makers publish differently. Everything they match on is in the full table below.

Keurig K-Express Single-ServeNinja Single Serve Coffee Maker PB051
Price$69.99—
Best forOne person, one mug, the least you can spend to get therePod convenience with four brew styles and an iced setting that is not just brewing over ice
What sets it apartAmong the least expensive machines here, still on the open K-Cup standard with reusable capsules availableFour brew strengths and a built-in frother, on a machine that also takes loose grounds
Auto Shutoff✓—
Brew Modes—Four: Classic, Rich, Over Ice and Specialty
Brew Technology—Thermal Flavor Extraction, which the maker credits for even saturation and calibrated cycles
FitsK-Cup—
Capsule SystemK-Cup pods, an open standard many brands makeK-Cup pods or loose grounds
Colour OptionsBlack, Island Berry, Mint, Warm Stone—
Dimensions—140 x 332 x 338 mm
Drink Sizes8, 10 and 12 ozUp to 24oz
Milk Frother TypeNoneManual built-in fold-away frother
Milk SystemNoneBuilt-in fold-away frother
Model—PB051
Power1001 W—
Proprietary Capsules✕—
Reusable Capsule Available✓✓
Warranty1 year—
Water Tank—1.6, removable and fold-away

Pros and cons

From each full review, written from the same published facts as the scores above.

Keurig K-Express Single-Serve
  • +$69.99, the second least expensive machine in this category
  • +K-Cup is an open standard, with reusable capsules available
  • +A one-year warranty and a 5-minute auto shut-off
  • −1001W, and no tank size or drink sizes published
  • −No weight is published
  • −Descaling is required
Full Keurig K-Express Single-Serve review →
Ninja Single Serve Coffee Maker PB051
  • +It takes K-Cups or loose grounds, so pods are optional rather than mandatory
  • +Four brew modes, Classic, Rich, Over Ice and Specialty, up to 24oz, the largest cup here
  • +A built-in frother, and Thermal Flavor Extraction which Ninja credits for even saturation
  • +A 1.6 litre removable fold-away tank
  • −No price is published for it here
  • −No wattage, weight or warranty term is published
  • −Specialty mode is a concentrate rather than true espresso: there is no pump pressure published
Full Ninja Single Serve Coffee Maker PB051 review →

Every specification, side by side

Keurig K-Express Single-ServeNinja Single Serve Coffee Maker PB051
Price
Price$69.99—
Who it suits
Best forOne person, one mug, the least you can spend to get therePod convenience with four brew styles and an iced setting that is not just brewing over ice
What sets it apartAmong the least expensive machines here, still on the open K-Cup standard with reusable capsules availableFour brew strengths and a built-in frother, on a machine that also takes loose grounds
Specifications
Auto Shutoff✓—
Brew Modes—Four: Classic, Rich, Over Ice and Specialty
Brew Technology—Thermal Flavor Extraction, which the maker credits for even saturation and calibrated cycles
FitsK-Cup—
Capsule MaterialPlastic, a #5 plastic cupPlastic, a #5 plastic cup
Capsule SystemK-Cup pods, an open standard many brands makeK-Cup pods or loose grounds
Colour OptionsBlack, Island Berry, Mint, Warm Stone—
Cost per capsule1.041.04
Dimensions—140 x 332 x 338 mm
Drink Sizes8, 10 and 12 ozUp to 24oz
Milk Frother TypeNoneManual built-in fold-away frother
Milk SystemNoneBuilt-in fold-away frother
Model—PB051
Power1001 W—
Proprietary Capsules✕—
Reusable Capsule Available✓✓
Ships toUSUS
Ships to NoteConfirmed on Amazon US, which is where this link points. Availability in other Amazon stores has not been checked, and a regional store may substitute a different product.Confirmed on Amazon US, which is where this link points. Availability in other Amazon stores has not been checked, and a regional store may substitute a different product.
Third Party Capsules Available✓✓
Warranty1 year—
Water Tank—1.6, removable and fold-away

Keurig K-Express Single-Serve vs Ninja Single Serve Coffee Maker PB051: common questions

Which is better, Keurig K-Express Single-Serve or Ninja Single Serve Coffee Maker PB051?

Keurig K-Express Single-Serve scores 6.2 against 5.7, both computed from published specifications rather than opinion. Ninja Single Serve Coffee Maker PB051 is still ahead on drink quality.

Is Keurig K-Express Single-Serve or Ninja Single Serve Coffee Maker PB051 cheaper?

Keurig K-Express Single-Serve starts at $69.99, and Ninja Single Serve Coffee Maker PB051 at Not publicly stated.

Who is Keurig K-Express Single-Serve for?

One person, one mug, the least you can spend to get there

Who is Ninja Single Serve Coffee Maker PB051 for?

Pod convenience with four brew styles and an iced setting that is not just brewing over ice

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