A ninja portable blender vs nutribullet portable blender review is what most shoppers search for once they narrow their list to these two. Both blenders promise fast smoothies, a cordless design, and a cup you can drink right from. But they are not the same product.
This guide is for busy people. Maybe you want a protein shake before the gym. Maybe you need something small for a desk at work or a bag on a trip. Either way, you want to know which blender earns its spot on your counter.
We’ll walk through what each blender does well, where it falls short, and who it fits best. You’ll see a side-by-side table, real buyer feedback patterns, and a clear final pick. No hype. Just the facts you need to buy with confidence.
Quick Summary
Both blenders are cordless, USB-C rechargeable, and built for single-serve blending. The Ninja Blast has a longer track record and a much larger review base. The NutriBullet Flex offers a bigger cup and a lighter drink-and-go design, but it’s newer and less proven.
- Best Overall: Ninja Blast Portable Blender
- Best Budget: Ninja Blast Portable Blender (often the lower-priced pick)
- Best Premium Feel: NutriBullet Flex Portable Blender
- Best Value: Ninja Blast Portable Blender
- Best for Beginners: Ninja Blast Portable Blender
- Best for Professionals / Daily Grinders: Ninja Blast Portable Blender
How We Evaluated These Blenders
We did not test these blenders ourselves. Instead, we based this comparison on:
- Official product specifications from the manufacturer listings
- Verified customer reviews and star ratings
- Public ratings and review counts on Amazon
- Patterns in repeated customer praise
- Patterns in repeated customer complaints
- Comparison of stated features side by side
We do not invent numbers. If something can’t be confirmed, we say so plainly.
Ninja Blast Portable Blender Overview
What It Is
The Ninja Blast (model BC151BK) is a cordless personal blender with an 18-ounce vessel. It runs on a rechargeable base and charges through USB-C. You blend and drink from the same cup.
Who It’s For
It suits people who want a no-fuss blender for shakes, smoothies, and frozen drinks at home or on the road. The hinged carry handle makes it easy to grab and go.
Typical Price Range
Ninja portable blenders in this line usually sit in the $30–$50 range, though pricing shifts often on Amazon.
Overall Reputation
Based on public ratings, the Ninja Blast holds a 4.2 out of 5-star rating from over 13,800 reviews. That’s a large sample size, which gives buyers a clearer picture of long-term reliability than a newer product would.
NutriBullet Flex Portable Blender Overview
What It Is
The NutriBullet Flex (model NBPB50200) is a cordless personal blender with a 22-ounce cup. Its main design idea is a detachable motor base. You can pop the base off and carry just the cup, cutting the weight roughly in half for travel.
Who It’s For
It fits people who want a bigger cup and don’t mind carrying the vessel separately from the base once it’s charged and blended.
Typical Price Range
The NutriBullet Flex typically lists in a similar range to the Ninja Blast, though exact pricing changes based on retailer promotions.
Overall Reputation
Based on public ratings, the NutriBullet Flex holds a 3.8 out of 5-star rating from 551 reviews. That’s a smaller review base than the Ninja Blast, so the feedback pattern is still forming.
Key Features Compared
Cordless, Rechargeable Design
What it does: Both blenders skip the cord and run off a rechargeable battery charged over USB-C.
Why it matters: No cord means no hunting for an outlet near your blending station, and easier packing for trips.
Who benefits: Commuters, travelers, gym-goers, and dorm or office users with no easy outlet access.
Common buyer feedback: Reviewers commonly report that the charge lasts several blending sessions before needing a recharge, though exact battery life numbers are not independently verified by us.
Blending Capacity
What it does: The Ninja Blast holds 18 ounces. The NutriBullet Flex holds 22 ounces.
Why it matters: A bigger cup means fewer refills if you drink large smoothies or make shakes for two.
Who benefits: Anyone who wants a full meal-replacement shake in one blend will lean toward the larger NutriBullet Flex cup.
Common buyer feedback: Some buyers mention the extra 4 ounces on the Flex is a real plus for post-workout shakes.
Detachable Motor Base vs Fixed Design
What it does: The NutriBullet Flex lets you remove the motor base entirely, cutting on-the-go weight. The Ninja Blast keeps the vessel and base as one connected system while blending, with the base separate only when swapping the sip lid on.
Why it matters: A lighter cup is easier to carry once you’re done blending and just want your drink.
Who benefits: Commuters who blend at home, then carry only the cup to work or the gym.
Common buyer feedback: Public reviews indicate this detachable feature is one of the most-liked design choices on the Flex.
Blade and Vortex Design
What it does: The Ninja Blast uses a stainless steel BlastBlade Assembly with a ribbed vessel that creates a vortex to pull ice down into the blades.
Why it matters: A strong vortex helps break down ice and frozen fruit more evenly, without needing to stop and shake the cup.
Who benefits: Anyone who blends frozen ingredients daily, like frozen fruit smoothies or protein shakes with ice.
Common buyer feedback: According to verified customer reviews, the Ninja Blast handles frozen ingredients well for a blender this size.
Lid and Sip Spout
What it does: Both blenders use a leakproof to-go lid with a carry handle or loop.
Why it matters: A secure lid means you can toss the blender in a bag without worrying about spills.
Who benefits: Anyone who blends in one place and drinks somewhere else, like a car or a gym locker room.
Common buyer feedback: Repeated customer feedback suggests the locking mechanism on both lids works well when closed properly, though a few reviewers note it takes practice to seal it right the first few times.
Cleaning and Maintenance
What it does: Both blenders have dishwasher-safe parts. The Ninja Blast also supports a 30-second self-clean cycle with water and a drop of dish soap.
Why it matters: A self-clean option saves time on busy mornings when you don’t want to hand-wash blades.
Who benefits: People who blend daily and want a fast reset between uses.
Common buyer feedback: Many buyers mention the self-clean cycle on the Ninja Blast is a genuine time-saver.
Power and Control
What it does: The Ninja Blast runs at 50 watts with separate power and blend buttons. The NutriBullet Flex uses a single-button control at 7.4 volts.
Why it matters: Separate buttons on the Ninja Blast help prevent the blender from turning on by accident in a bag.
Who benefits: Anyone who’s ever had a blender switch on inside a backpack will appreciate this small design choice.
Common buyer feedback: Based on official specifications, both models use a single speed setting, so neither offers manual speed control.
Real Buyer Feedback
Common Praise
Reviewers commonly report that the Ninja Blast crushes ice and frozen fruit without much fuss. Many buyers mention the sip lid feels secure once locked. Public reviews indicate the self-clean cycle saves real time during the week.
For the NutriBullet Flex, some buyers mention the detachable base makes it feel lighter to carry once blending is done. The larger 22-ounce cup also gets repeated praise from buyers who want bigger servings.
Common Complaints
Based on verified customer reviews, a smaller share of Ninja Blast buyers mention the single speed setting limits texture control for thicker blends like nut butter. Some also note the charging cable is short for certain outlet setups.
For the NutriBullet Flex, repeated customer feedback suggests the smaller review base makes long-term durability harder to judge right now. A few reviewers also mention the detachable base takes a moment to learn how to lock in place correctly.
Unexpected Strengths
Reviewers commonly report that the Ninja Blast’s carry handle holds up well over repeated daily use, which isn’t something every buyer expects from a personal blender at this price.
Unexpected Weaknesses
Public reviews indicate that neither blender is meant for hot liquids or hard ingredients like coffee beans. Buyers who try to push these blenders past frozen fruit and soft ice report disappointing results.
Who Should Buy the Ninja Blast
The Ninja Blast fits buyers who want a proven track record backed by a large number of verified reviews. It’s a strong pick if you make smoothies or shakes daily and want a reliable, well-tested option.
It also suits anyone nervous about accidental power-ons in a bag, thanks to the separate power and blend buttons.
Who Should Buy the NutriBullet Flex
The NutriBullet Flex fits buyers who want a bigger 22-ounce serving and like the idea of carrying a lighter cup once the base is removed. If you make large post-workout shakes and don’t mind a newer product with a smaller review history, this is a reasonable pick.
Who Should Avoid Each One
Buyers who want multiple speed settings should look elsewhere, since neither blender offers that. Anyone who blends coffee beans, ice cubes larger than what the manual allows, or hot soups should avoid both models, as neither is built for that kind of use.
If a long, heavily reviewed track record matters most to you, the NutriBullet Flex’s smaller review count may give you pause.
Ninja Blast: Pros and Cons
Pros:
- Large, well-established review base with a 4.2-star average
- Separate power and blend buttons reduce accidental startups
- 30-second self-clean cycle saves time on busy days
- Ribbed vessel and BlastBlade design help with frozen ingredients
- Dishwasher-safe parts for easy cleanup
- USB-C charging works with cables you likely already own
Cons:
- 18-ounce capacity is smaller than the NutriBullet Flex
- Single speed setting limits texture control
- Charging cable length may not suit every outlet setup
NutriBullet Flex: Pros and Cons
Pros:
- Larger 22-ounce cup fits bigger smoothies and shakes
- Detachable motor base cuts carry weight for travel
- Dishwasher-safe blade and lid parts
- Silicone charge port cover helps guard against liquid damage
- Simple single-button control is easy for first-time users
Cons:
- Smaller review sample (551 reviews) makes long-term reliability harder to confirm
- Lower average star rating (3.8) compared to the Ninja Blast
- Learning curve to properly lock the detachable base
Head-to-Head Comparison Table
Feature | Ninja Blast (BC151BK) | NutriBullet Flex (NBPB50200) |
Build Quality | Stainless steel blade, BPA-free plastic vessel | Stainless steel blade, plastic cup |
Performance | Strong on frozen fruit and ice, per reviews | Smooth blends reported, per reviews |
Ease of Use | Two-button control | Single-button control |
Noise Level | Not officially disclosed | Not officially disclosed |
Power | 50 watts, 7.4V rechargeable base | 7.4V rechargeable base |
Capacity | 18 fl. oz. | 22 fl. oz. |
Speeds | 1 speed | 1 speed |
Warranty | 1-year limited warranty | 1-year limited warranty |
Compatibility | Vessel doubles as drinking cup | Cup detaches fully from base |
Maintenance | Dishwasher safe, self-clean cycle | Dishwasher safe |
Cleaning | 30-second self-clean with soap and water | Hand wash or dishwasher |
Durability | Backed by 13,800+ reviews | Backed by 551 reviews |
Energy Efficiency | USB-C rechargeable | USB-C rechargeable |
Price | Typically lower to mid-range | Typically similar range |
Value | Strong, given review volume | Fair, given larger cup size |
Best For | Daily smoothie and shake routines | Larger servings, travelers |
Performance, Cleaning, and Long-Term Ownership
Performance
Both blenders are built for soft, frozen ingredients, not hard foods. Reviewers commonly report that the Ninja Blast’s vortex design helps it push through ice more evenly. The NutriBullet Flex’s refined blade also gets praise for smooth texture, according to public product information.
Ease of Use
The Ninja Blast’s two-button setup takes a moment to learn but adds a safety layer. The NutriBullet Flex’s single-button control is simpler for first-time buyers who want to blend and go without thinking twice.
Build Quality
Both use stainless steel blades. The main difference is how the parts connect. The Flex’s fully detachable base is a newer approach, while the Ninja Blast keeps things more traditional.
Durability
This is where review volume matters most. With over 13,800 reviews, the Ninja Blast has a longer track record to judge durability against. The NutriBullet Flex, with 551 reviews, hasn’t built up the same history yet.
Noise Level
Neither manufacturer publishes official decibel ratings, so we can’t compare noise level with confirmed numbers. If quiet operation is a priority, check current reviews closer to your purchase date for updated feedback.
Cleaning
The Ninja Blast’s self-clean cycle is a real advantage for anyone blending daily. The NutriBullet Flex relies on dishwasher-safe parts or hand washing, which takes a bit more time.
Power Consumption
Both run on similar rechargeable battery systems charged through USB-C, so day-to-day energy use should feel comparable for most buyers.
Value
Given the larger review base and generally favorable rating, the Ninja Blast currently offers stronger value for most buyers. The NutriBullet Flex’s larger cup size is a fair trade-off if capacity matters more to you than proven reliability.
Long-Term Ownership
Repeated customer feedback suggests personal blenders like these hold up well with regular cleaning and gentle use. Avoid pushing past the manufacturer’s suggested ingredients, and both should serve you for a reasonable stretch of daily use.
Buying Guide
How to Choose
Start with your daily habit. Do you make one shake a day, or two smaller ones? If you need bigger servings, the NutriBullet Flex’s 22-ounce cup makes sense. If you want a proven, widely reviewed option, the Ninja Blast is the safer bet.
Most Important Features
Focus on capacity, cleaning method, and how each blender handles frozen ingredients. Skip features you won’t use, like multiple speeds, since neither model offers that anyway.
Common Buying Mistakes
Don’t assume a bigger cup always means better value. Don’t ignore review count when comparing star ratings, since a 4.2-star rating from 13,800 reviews carries more weight than a 3.8-star rating from 551.
Budget Considerations
Prices shift often on Amazon. Compare current listings before assuming one is cheaper than the other.
Safety
Both use a locking lid, but reviewers note it takes a few tries to learn how to seal it properly. Always check the lid is locked before shaking or carrying the blender in a bag.
Maintenance
Rinse right after use to stop residue from drying onto the blade. Use the self-clean cycle on the Ninja Blast, or the dishwasher-safe parts on either model, on a regular basis.
Compatibility
Neither blender is designed to work with other brands’ cups or bases, so stick with the manufacturer’s replacement parts if something wears out.
Long-Term Costs
Replacement blades and lids are the main long-term cost to plan for. Check official manufacturer parts pages before buying third-party replacements.
When Upgrading Makes Sense
If you’re outgrowing single-serve blending and want more speed settings or larger jars, look at a full-size countertop blender instead of another personal model.
Quick Winner Picks
- Best Overall: Ninja Blast, thanks to its stronger review base and proven track record.
- Best Budget: Ninja Blast, which often lists at a lower price point.
- Best Premium Feel: NutriBullet Flex, with its detachable base and larger cup.
- Best Features: NutriBullet Flex, for the extra 4-ounce capacity and lighter carry design.
- Best Value: Ninja Blast, based on its rating-to-review ratio.
- Best for Beginners: Ninja Blast, for the simple two-button control and self-clean feature.
- Best for Heavy Users: Ninja Blast, given the volume of long-term feedback backing its durability.
Other Blenders Worth a Look
- Ninja Fit Personal Blender: A corded alternative for kitchen counters that don’t need portability.
- NutriBullet Original 900: A larger-capacity personal blender for those who don’t need a cordless design.
- BlendJet 2: A compact, budget-friendly cordless option for buyers who prioritize size over blending power.
Final Verdict
If you want a well-reviewed, reliable personal blender for daily smoothies, the Ninja Blast is the stronger overall pick. It’s backed by thousands more reviews, includes a helpful self-clean feature, and keeps accidental startups in check with its two-button design.
If a bigger cup and a lighter carry weight matter more to you than a long review history, the NutriBullet Flex is a reasonable alternative, especially for post-workout shakes.
Neither blender handles hot liquids, coffee beans, or hard ingredients, so keep expectations realistic either way.
My Recommendation: Go with the Ninja Blast Portable Blender if you want the safer, more proven choice. Choose the NutriBullet Flex if the extra capacity and detachable design fit your routine better.
FAQ
Is the Ninja Blast or NutriBullet Flex better for daily smoothies?
Based on verified customer reviews, the Ninja Blast has a stronger track record for daily smoothie use, thanks to its larger review base and 4.2-star average.
Which one has a bigger cup?
The NutriBullet Flex holds 22 ounces, while the Ninja Blast holds 18 ounces.
Can either blender crush ice?
Public reviews indicate both blenders handle ice and frozen fruit reasonably well, though neither is designed for very hard ingredients like coffee beans.
Are the parts dishwasher safe?
Yes. Both the Ninja Blast and NutriBullet Flex list dishwasher-safe parts, based on official specifications.
What’s the warranty on each blender?
Both come with a 1-year limited warranty, according to official product listings.
Does a ninja portable blender vs nutribullet portable blender review need to cover battery life?
Battery life isn’t independently verified by us, so we recommend checking current buyer reviews for real-world charge duration before you decide.
Can I use these blenders for hot soups?
No. Neither manufacturer recommends hot liquids for these personal blenders.
Which blender is easier for a first-time buyer?
The Ninja Blast’s simple two-button layout and self-clean cycle make it a comfortable pick for buyers new to personal blenders.
