Portable blenders have come a long way. In 2026, two models keep showing up at the top of every “best portable blender” search: the Nutribullet Flex (launched September 2025) and the legendary Ninja Blast (BC151). Both fit in a gym bag, both charge via USB-C, and both promise silky smoothies on the go — but they’re built around very different philosophies.
We tested both blenders side by side over several weeks, blending everything from fresh spinach to frozen mango chunks and protein shakes. Here’s our honest verdict.
➡ Jump straight to our pick: Ninja Blast wins for power users; Nutribullet Flex wins for commuters who want to travel light.
📊 Quick Specs Comparison
| Spec | Nutribullet Flex | Ninja Blast (BC151) |
| Price (MSRP) | ~$70–$100 | ~$60–$70 |
| Capacity | 22 oz (XL) | 18 oz |
| Motor | 7.4V | 7.4V |
| Charging | USB-C | USB-C |
| Blends/charge | 11+ blends | 15 blends |
| Weight (full) | 1.9 lbs | ~2.0 lbs |
| Detachable base | ✅ Yes | ❌ No |
| Removable blade | ✅ Yes (dishwasher) | ❌ No |
| Ice crushing | ⚠ Limited | ✅ Strong |
| Cup fits cupholder | ✅ Yes | ✅ Yes |
| Colors available | 6 colorways | 8 colorways |
| Warranty | 1 year | 1 year |
1. Design & Portability: Detachable Base vs. One-Piece
The biggest design difference between these two blenders is how they handle the motor during transit. The Nutribullet Flex introduces a twist-off motor base — once blending is done, you unscrew the base and carry just the 22 oz cup. This cuts on-the-go weight by roughly 50%, making it genuinely lighter to toss in a bag.
The Ninja Blast (BC151) uses a more conventional one-piece design: the motor stays attached to the cup during blending and transport. It’s slightly simpler to operate (no twisting required), but you carry the full device wherever you go.
Both fit in standard car cupholders and most gym bags. The Nutribullet Flex measures 3.3 × 3.3 × 12″ at 1.9 lbs — thinner than a Stanley cup. The Ninja Blast is similarly compact at about 9 cm wide.
🏆 Design winner: Nutribullet Flex — the detachable base is a genuinely clever innovation for daily commuters.
2. Blending Performance: Smoothies, Frozen Fruit & Protein Shakes
Both blenders share the same rated voltage (7.4V), but real-world performance differs significantly depending on what you’re blending.
Nutribullet Flex
The Flex shines with soft ingredients: fresh fruit, leafy greens, yogurt, protein powder, and nut butters. It delivers silky, smooth results in its automatic 30-second blend cycle. However, testers noted it struggles with denser frozen ingredients — particularly frozen banana chunks or hard ice cubes — sometimes leaving behind small unblended pieces.
It’s also billed as Nutribullet’s quietest portable blender to date, which is a plus in office or co-working settings.
Ninja Blast (BC151)
The Ninja Blast earns its name. Thanks to its ribbed vessel that creates a vortex and its durable stainless steel BlastBlade Assembly, it handles frozen berries, banana, and light ice crushing reliably. Smoothies come out uniformly textured without needing multiple blend cycles.
Multiple head-to-head comparisons in 2026 put it above the Nutribullet Flex for overall blending power, especially for frozen ingredients. One roundup noted: it handles frozen fruit with ease — something most portable blenders still can’t claim.
🏆 Performance winner: Ninja Blast — superior handling of frozen ingredients and ice.
3. Battery Life & Charging
The Ninja Blast pulls ahead here too: it offers up to 15 blends per charge, compared to the Nutribullet Flex’s 11+ blends. Both charge via USB-C, which is a major convenience win over older portable blenders that used proprietary connectors.
Full charge time on both is approximately 2 hours. For most users making 1–2 smoothies per day, either blender will last several days on a single charge.
🏆 Battery winner: Ninja Blast — 15 blends per charge vs. 11+ for the Flex.
4. Cleaning & Maintenance
Nutribullet Flex takes the trophy here without contest. Its detachable, dishwasher-safe blade is a genuine game-changer — no scrubbing around blade crevices. The cup and lid are also dishwasher safe. You can also do a quick self-clean by filling with water and a drop of dish soap, then blending for 30 seconds.
The Ninja Blast has a dishwasher-safe cup and lid, but the blade assembly is harder to clean thoroughly. Several real-user reviews flagged that blade crevices trap residue and require a dedicated brush for a thorough clean — a minor but real daily friction point.
🏆 Cleaning winner: Nutribullet Flex — the removable dishwasher-safe blade is a major practical advantage.
5. Price & Value
The Ninja Blast regularly retails at $60–$70, making it $10–$30 cheaper than the Nutribullet Flex (~$70–$100). For what you get in blending performance and battery life, the Ninja Blast is arguably the better value play.
The Nutribullet Flex’s detachable base design and easier cleaning do justify some of the premium — but only if those specific features matter to your daily routine.
🔗 Current prices on Amazon: Ninja Blast (Black) | Ninja Blast (Denim Blue) | Nutribullet Flex (Gunmetal Gray)
🏆 Value winner: Ninja Blast — better performance at a lower price.
- POWERFUL PORTABLE BLENDING: Blast through frozen ingredients with Ninja Blast portable blending power for perfectly smoo…
- 18-OZ BLENDING CAPACITY: Make up to 18 oz. of your favorite smoothies, protein shakes, and frozen drinks in the same ves…
- PREMIUM COLORS & CARRY: Choose colors that fit your style and take your drink on the go with a comfortable, hinged carry…
6. Pros & Cons Summary
✅ Nutribullet Flex — Pros
- Detachable motor base: carry just the cup, cutting weight by 50%
- Removable, dishwasher-safe blade for effortless cleanup
- XL 22 oz capacity — the largest in this category
- Nutribullet’s quietest portable blender
- 6 stylish two-toned colorways
- USB-C rechargeable
❌ Nutribullet Flex — Cons
- Struggles with dense frozen ingredients and hard ice
- Higher price point (~$70–$100)
- Only 11+ blends per charge
- Some users report inconsistent activation (troubleshooting required)
👉 Shop the Nutribullet Flex: Gunmetal Gray | Sapphire Blue | Ruby Red
- Lightweight, detachable vessel. Remove the Motor Base to lighten on-the-go weight by 50%.
- Leak-proof to-go lid. Sip easily and carry effortlessly with the flexible handle.
- Refined blade technology. Engineered for smoother, silkier blends.
✅ Ninja Blast (BC151) — Pros
- Strong blending power — handles frozen fruit and light ice
- 15 blends per charge (best battery life in class)
- More affordable (~$60–$70)
- BlastBlade Assembly creates a natural vortex for even blending
- USB-C rechargeable
- 8 color options
❌ Ninja Blast (BC151) — Cons
- Motor stays attached during transport (heavier carry)
- Blade assembly harder to clean — crevices trap residue
- Smaller 18 oz capacity
👉 Shop the Ninja Blast: Black (BC151BK) | Denim Blue (BC151NV)
- POWERFUL PORTABLE BLENDING: Blast through frozen ingredients with Ninja Blast portable blending power for perfectly smoo…
- 18-OZ BLENDING CAPACITY: Make up to 18 oz. of your favorite smoothies, protein shakes, and frozen drinks in the same ves…
- PREMIUM COLORS & CARRY: Choose colors that fit your style and take your drink on the go with a comfortable, hinged carry…
Bonus: Should You Consider the Ninja Blast Max?
If the standard Ninja Blast doesn’t feel powerful enough, Ninja also makes the Blast Max (BC251) — an upgraded version with a more powerful motor, 22 oz capacity (matching the Nutribullet Flex), 3 blend programs (Blend, Ice Crush, and Smoothie), and even better battery life. It crushes ice definitively and handles tough fibrous greens like kale with ease.
At $89.99, it’s priced between the standard Blast and the Nutribullet Flex. If you want no compromises, the Blast Max is the best portable blender you can buy in 2026.
👉 Check the Ninja Blast Max (BC251) on Amazon
- BLEND, TWIST and GO: Detachable base is the first of its kind for ultimate portability. Powerfully blend, twist and take…
- NINJA BLENDING POWER: Unlock the power and performance of a corded blender, now cord free with Ninja Powerblast Technolo…
- DETACHABLE VESSEL: Exclusive Twist and Go blending vessel can detach from the motor base with one twist and is 50% light…
🏆 Our Verdict: Which One Should You Buy?
| You should buy the… | If… |
| 🥤 Nutribullet Flex | You want to travel light, prioritize cleaning ease, and mostly blend fresh/soft ingredients |
| ⚡ Ninja Blast (BC151) | You regularly blend frozen fruit, want the best battery life, and prefer a lower price |
| 💪 Ninja Blast Max (BC251) | You want the best portable blender available with no compromises on power or capacity |
Frequently Asked Questions
Does the Nutribullet Flex crush ice?
Only lightly. The Nutribullet Flex handles small ice pieces mixed with liquid, but it’s not designed for full ice-crushing. For blended ice drinks, the Ninja Blast is the better pick.
Can the Ninja Blast make frozen smoothies?
Yes — that’s one of its standout advantages. The BlastBlade Assembly and ribbed vortex vessel give it enough power to break down frozen strawberries, blueberries, and banana chunks reliably.
How long does it take to charge?
Both blenders charge fully in approximately 2 hours via USB-C. The Ninja Blast gets up to 15 blends per charge, the Nutribullet Flex around 11+.
Are both blenders BPA-free?
Yes. Both use BPA-free cups and components. The Nutribullet Flex cup and lid are dishwasher-safe; so are the Ninja Blast’s cup and lid.
Which is better for protein shakes?
Both handle protein powder mixed with liquid or milk easily. If your protein shake involves frozen fruit or ice, lean toward the Ninja Blast.
