Best Sugar-Free Energy Drinks of 2025

"I absolutely love these! I found them in a local store and have been an avid drinker ever since, even though I can only find them on Amazon now. I enjoy every flavor and appreciate the nice pick-me-up they provide without any jitters, anxiety, or racing heart. The caffeine from green tea gives me a noticeable boost that lasts through my afternoon workday. While the pre-workout versions do make my face a bit itchy due to beta-alanine, I've had no bad side effects. They can be a bit pricey, but I try to catch deals."

"I don't use this before workouts; instead, I rely on it during my school hours. As someone with ADHD, I found it immensely helpful for maintaining focus, especially when I was unmedicated. I sip it slowly over several hours, and the taste surprised me—not overly sweet thanks to the citric acid. The energy boost is a solid 10/10, lasting without spikes in blood sugar or jitters like with coffee."

"The 200mg caffeine gives me a noticeable boost, making it perfect for a morning pick-me-up. The price per can is somewhat steep unless you catch them on sale. Overall, if you find them on sale, the Cellucor C4 Smart Energy Drink is a decent option for a caffeine lift, though I still prefer Rockstar or Monster."

"I find C4 Sugar-Free Watermelon fits perfectly into my workout routine. I take it 30 minutes before training, and honestly, it's the best pre-workout ever! The taste is amazing and it delivers incredible results during my workouts, reducing muscle fatigue and keeping me energized."

"These drinks are so good! They taste fantastic and give me just the energy boost I need."

"I absolutely love the C4 Jolly Rancher flavor! It’s spot on and works great for my workouts or whenever I need a little pick-me-up."

"I've tried a lot of energy drinks, but this one is my favorite. Not too sweet and the 300mg of caffeine is perfect for those days when I haven't slept well. I find it better than coffee on those tough mornings—no sugar and just 5 calories. It's happiness in a can!"

"When I drink this, I feel really stimulated. However, I did have a bit of trouble with the taste at first; it reminds me a lot of lime."

"I got an amazing deal on these drinks that usually cost me over $3 each. They taste great and pack a lot of caffeine!"

"I've tried a bunch of energy drinks, and ZOA energy drinks are among the best. They provide a solid energy boost without the jittery feeling, and the flavors are fantastic—who doesn't love Tropical Punch or Pineapple Coconut? For my mornings, I stick with Yerba Magic, which is easy to prepare and has a refreshing peach mango flavor. It keeps my gut healthy and gives a smooth and steady energy boost without crashes. My routine is simple: Yerba Magic in the morning and a ZOA later for an extra push. It's the perfect combo!"

"I recently tried the ZOA Zero Sugar Energy Drinks in a variety pack. While my stepdad loves them, I have mixed feelings. They’re sugar-free and full of electrolytes, vitamin C, and amino acids, which is great, but I noticed a funny aftertaste that reminded me of burnt hair. If you're seeking a healthier energy drink option, they might be worth a shot, especially if you enjoy unique flavors!"

"When I bought these, I was doing the 75 hard challenge. The flavors are great, but after a while, I found myself getting tired of the same taste. Overall, I'd buy them again, though I prefer smaller packs."

"I was seeking a pre-workout boost, and I found it in C4 Energy. The taste is fantastic, and it provides me with clean energy without any jitters during my workouts. I enjoy sipping on a can from 6 AM to 7:30 AM before my workout. Great quality with no sugar, and I will definitely buy again!"

"After trying the Starburst Strawberry flavor, I was genuinely impressed. The aroma of ripe strawberries hits you as soon as you open the can, and it delivers a refreshingly sweet taste without any cloying aftertaste. The energy boost is immediate and focused, allowing me to push through my workout without a crash afterward. This flavor adds a fun twist to my hydration routine, making it feel like a guilt-free treat!"

"C4 keeps delivering amazing flavors! The Skittles flavor is my favorite, and I was lucky to snag a deal on a 12-pack. I appreciate the steady energy it provides throughout the day without making me feel jittery. However, I heard it might be discontinued, which makes me sad. For now, I’m a happy customer enjoying this fantastic product!"

"I decided to try Rockstar because of its reasonable pricing. It has a sweet taste reminiscent of Sweetarts and provides a good energy boost. I would definitely recommend buying it!"

"My family and I have loved this drink for a while. We ordered it from Amazon since local stores stopped carrying it. It tastes more like a fruity drink than an energy drink, especially when it's closer to frozen temperature. It’s easy to drink and doesn’t leave a weird aftertaste. We prefer it over the whipped orange flavor!"

"I bought this to support Rockstar and compare it to the OG flavor. The original was better, though. I remember when Rockstar was the first energy drink in the USA; it was my go-to! The new formula just isn’t the same. Thankfully, they brought back the OG flavor with the throwback version, and I truly hope they keep it around permanently. I’ll definitely be buying more of the OG Throwback versions!"

"I've been drinking Rockstar Pure Zero for about 5 or 6 years now, and I order it by the case from Amazon. It’s extremely cost-effective and convenient for me. I drink quite a few, and honestly, I wouldn't be surprised if their stocks dipped if I ever stopped! The flavor is more citrus than grapefruit, not too sweet, and lightly carbonated, which I love. Plus, it's sugar-free with sucralose, essential for my aspartame allergy."

"While I'm not typically a Rockstar person, I must say this is the best grape flavor I've ever tasted! It surpasses C4, which I usually prefer, and the extra caffeine boost is a nice touch."

"As someone who enjoys energy drinks, I find these to be great. The price is fantastic, but I've encountered some cans that arrived a bit damaged with dents. Nevertheless, I still plan to order these again!"

"I had a hard time finding large quantities of Bang for my daily needs. Despite being cautious about ordering food online, I find Bang to be the only sugar-free energy drink I can enjoy. My favorite flavor is peach mango, but I also love strawberry and blue raspberry. I appreciate that it doesn’t give me jitters or crashes, and it tastes so much better than other sugar-free options. Plus, I can order in bulk without running around different stores!"

"I absolutely love Bang Energy! It strikes the perfect balance between taste and effectiveness. I experience laser focus without the crash that other energy drinks give. With so many flavors to choose from, I can enjoy a new one every day. Just open a can, sip, and I'm energized. The flavor variety is even better than the energy boost!"

"Cotton Candy Bang Energy has become my favorite! The flavor is perfectly sweet without being too sugary, and it doesn’t leave that annoying artificial aftertaste. I get a consistent boost of energy and focus that lasts for hours, all without any sugar. Whether I'm working out or just need a lift during the day, this drink delivers exactly what I'm looking for. I highly recommend it!"

“I found this little gem in a 7-Eleven and got hooked. The sparkling orange flavor is refreshing and lightly carbonated—definitely worth trying!”

“I absolutely love how awake and healthy I feel after drinking it! It's great value for the money and the fizz-free option is perfect for me.”

“I've been getting CELSIUS Sparkling Orange through Subscribe and Save every two weeks. The orange flavor is crisp and not too sweet—my go-to for a little boost!”

"I’m a huge fan of Red Bull, and this is the best value I’ve come across. At just 14 cents an ounce, it’s unbeatable!"

"Surviving with a new dietary restriction has been challenging, but Red Bull Sugar Free has fit seamlessly into my routine. It delivers the same kick without the sugar, making it a reliable companion for my daily exercises."

"I appreciate that it’s wheat-free, gluten-free, and vegetarian, which aligns with my dietary needs. It’s easy to store, and the subtle flavor pairs well with meals, making it a versatile choice."