
Keurig K-Cafe
Score: 76/100
Ninja Coffee Maker Black
Score: 77/100Rankings

The Ninja PB051 is a versatile single-serve brewer that handles both pods and grounds and includes a built-in frother, making it ideal for specialty drinks. Its trade-offs are a modest water reservoir and plastic construction. Best suited for solo drinkers or small households seeking flexibility in a compact unit.

The Keurig K-Café SMART adds Wi-Fi, a built-in frother and a large 60-oz reservoir to the single-serve lineup, delivering café-style drinks at home. Its bulkier plastic design and need for frequent cleaning offset the convenience of its many features. Best for coffee enthusiasts who want latte capability and smart control in a small household.
| Attribute | ![]() | ![]() |
|---|---|---|
1,770 mlbest | 1,656 ml | |
— | 1,550 Wbest | |
| ↓ lower better | — | 1,550 Wbest |
| ↓ lower better | 5,740 g | 3,897 gbest |
— | 1 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Design & Capacity(3) | ||
Water Reservoir Capacity (ml) | 1770 ml | 1656 ml |
Weight (g) | 5740 g | 3897 g |
Dimensions (HxWxD) (cm) | 31.8 x 29.7 x 38.9 cm cm | 33.8x14.0x33.2 cm cm |
Features(1) | ||
Brew Size Options | 2-12 oz | 6-24 oz |
Accessories(1) | ||
Included Accessories | coffee maker, frother | milk frother; brew basket; pod adapter; storage drawer; power cord |

Products in the top-left offer the best value (high score, low price).

Professional reviewers highlight the K-Café SMART as a versatile, smart-connected coffee maker that excels at producing café-style milk drinks, thanks to its integrated frother, Multistream extraction, and app control, while noting its bulkier plastic design may limit placement in tight kitchens.
Everyday users consistently praise the speed and quality of lattes, the convenience of a large water reservoir, and the range of brew options, but they frequently mention confusion over dimensions and the need for regular cleaning of the frother and reservoir.


Choose Ninja for flexibility and frothing; choose Keurig if you only need pod brewing and prefer a metal build.

Retailer and editorial sources consistently emphasize the Ninja PB051's versatility, compact footprint, and built-in frother, positioning it as a superior alternative to typical pod-only single-serve brewers.
Consumer sentiment is neutral to positive, with strong demand and general approval of the machine's flexibility and space-saving design.