The best sugar-free energy drinks
Zero sugar doesn't have to mean a chemical aftertaste. These are the 20 highest-scoring zero-sugar drinks of the 111 sugar-free cans we've rated.
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| # | Drink | Caffeine | Score |
|---|---|---|---|
| 1 |  Alani Nu MimosaAlani Nu |
200 mg | 93 |
| 2 |  C4 Black CherryC4 |
200 mg | 92 |
| 3 |  UPTIME Original Citrus Sugar FreeUptime |
142 mg | 92 |
| 4 |  Alani Nu Juicy PeachAlani Nu |
200 mg | 91 |
| 5 |  C4 Twisted LimeadeC4 |
200 mg | 91 |
| 6 |  Monster Ultra GoldMonster |
150 mg | 91 |
| 7 |  Monster Zero UltraMonster |
140 mg | 90 |
| 8 |  Alani Nu BreezeberryAlani Nu |
200 mg | 90 |
| 9 |  Ghost Sour Pink LemonadeGhost |
200 mg | 90 |
| 10 |  PRIME Energy Drink Lemon LimePRIME |
200 mg | 90 |
Zero-sugar status reflects each brand's current US formula. Check the nutrition panel if sugar matters to you.
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Alani NuShark Score 93
1. Alani Nu Mimosa
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Elite
“The single most refreshing energy drink out there. My highest rated beverage to date that truly is enjoyable to everyone.”Cam
-
Shark Score 92
- 200 mg caffeine
- 16 oz can
- 12.5 mg/oz
- Zero sugar
- Elite
“Smooth, strong black cherry flavor with the perfect amount of sweetness for everybody.”Cam
-
Shark Score 92
- 142 mg caffeine
- 12 oz can
- 11.8 mg/oz
- Zero sugar
- Elite
“Original Citrus is the gold standard for the refreshing, moderate caffeine-content group of energy drinks.”Jared
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Alani NuShark Score 91
4. Alani Nu Juicy Peach
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Elite
“Incredibly juicy and quite peachy. Highly refreshing, smooth, and flat out delicious.”Cam
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Shark Score 91
- 200 mg caffeine
- 16 oz can
- 12.5 mg/oz
- Zero sugar
- Elite
“Like a Diet Dew with a generous splash of lime.”Jared
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MonsterShark Score 91
6. Monster Ultra Gold
- 150 mg caffeine
- 16 oz can
- 9.4 mg/oz
- Zero sugar
- Elite
“I haven’t crunched the numbers yet but after a couple sips I knew this drink would sit closer to the top of the rankings within it’s product line”Matt
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MonsterShark Score 90
7. Monster Zero Ultra
- 140 mg caffeine
- 16 oz can
- 8.8 mg/oz
- Zero sugar
- Elite
“It’s crisp, sweet, and refreshing with a nice aftertaste – definitely the drink I reach for if I want a consistent, delicious kick.”Jared
-
Alani NuShark Score 90
8. Alani Nu Breezeberry
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Elite
“Sweet tart blue raspberry flavor, exciting moutheel, and overall excellent energy drink.”Cam
-
Shark Score 90
- 200 mg caffeine
- 16 oz can
- 12.5 mg/oz
- Zero sugar
- Elite
“Ghost Sour Pink Lemonade is extremely crisp and refreshing and absolutely lives up to the rest of the Ghost lineup.”Jared
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Shark Score 90
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Elite
“If you like lemon-lime, or energy drinks in general, you should check out PRIME Lemon Lime.”Jared
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Shark Score 90
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Elite
“The strawberry watermelon combination tastes like summer in a can.”Jared
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Shark Score 90
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Elite
“Smooth fruit punch flavor with melon aftertaste that walks the fine line of re-drinkability by not being too sweet.”Jared
-
Shark Score 90
- 142 mg caffeine
- 12 oz can
- 11.8 mg/oz
- Zero sugar
- Elite
“Despite the relatively low caffeine content, I would recommend this to anyone who’s looking for a refreshing, fruity kick.”Jared
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Shark Score 89
- 200 mg caffeine
- 16 oz can
- 12.5 mg/oz
- Zero sugar
- Excellent
“A delicious blue beverage with a solid amount of carbonation and caffeine. With 200mg of caffeine, no calories, and a popular flavor, I would recommend this to all energy drink lovers.”Cam
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Shark Score 89
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Excellent
“My first thought was wow, that’s artificial. But my second thought was, damn, I really don’t care. It’s that good!”Jared
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Shark Score 88
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“A sweet and crisp nectarine flavor, complemented by a subtle, delicious blueberry aftertaste.”Cam
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Shark Score 88
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Excellent
“Definitely tropical and incredibly refreshing.”Jared
-
Shark Score 88
- 300 mg caffeine
- 16 oz can
- 18.8 mg/oz
- Zero sugar
- Excellent
“A unique strawberry taste, great mouth feel, and high caffeine content that will leave you wanting more.”Cam
-
Shark Score 88
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Excellent
“Unique mouthfeel with an excellent combination of flavors. The peach and nectarine combo may be overly sweet for some, but I think that it is one of the more refreshing beverages out there.”Cam
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Shark Score 87
- 200 mg caffeine
- 12 oz can
- 16.7 mg/oz
- Zero sugar
- Excellent
“Everyone should try this if you like at least one of Green Apple or Cherry since they’re blended together very well.”Jared
Questions
What is the best sugar-free energy drink?
Alani Nu Mimosa is the top-rated zero-sugar energy drink we've tried, with a Shark Score of 93.
Are sugar-free energy drinks healthier?
They skip the 50-plus grams of sugar in a regular 16 oz can, but they still carry the same caffeine. Most use sucralose, stevia, or erythritol instead. Caffeine is the number to watch.