Ninja and Cosori are two of the most popular air fryer brands in the UK right now, and they could hardly be more different. Ninja is the premium, feature-packed powerhouse that dominates the dual-zone market. Cosori is the value-focused, beginner-friendly brand that quietly outsells most of the competition on Amazon. Both make genuinely good air fryers — but they aim at different people, different kitchens and different budgets. After researching both ranges in depth and analysing hundreds of verified owner reviews, this is an honest head-to-head to help you work out which one actually suits you.
The short answer
If you want the most capable, versatile air fryer for a busy family kitchen and you are happy to spend a bit more, the Ninja Foodi MAX Dual Zone AF400UK is the standout. If you want a brilliant, compact air fryer at a price that feels almost too good and you are cooking for one or two, the Cosori TurboBlaze 6L is superb value. That is the comparison in a sentence — but the detail is where your answer lives, so let us go through it properly.
Price: Cosori wins on sticker, Ninja wins on cost per feature
This is the most obvious dividing line. The Cosori TurboBlaze 6L comes in at around £109.99. The Ninja AF400UK sits around £199 — roughly double. That sounds like a clear Cosori win, but the Ninja gives you two independent cooking zones (each with its own temperature and timer), nearly double the total capacity, and a Sync Finish function that times both drawers to finish together. Per feature, the Ninja is actually reasonable; it just offers a lot more features. The real question is whether you need them.
Capacity and who it feeds
The Ninja AF400UK gives you 9.5 litres across two drawers — enough to comfortably cook a complete meal for four (chips in one drawer, chicken in the other). The Cosori TurboBlaze offers 6 litres in a single basket, which realistically feeds one to two people per batch. If you are cooking for a family, the Ninja's dual-zone design is transformative: everything finishes at the same time, no batch-juggling required. For a couple, a student, or someone who lives alone, the Cosori's single basket is ample and takes up far less counter space. Our guide to what size air fryer you actually need walks through the capacity maths.
Cooking performance
Both produce excellent results for the money. The Ninja heats fast, crisps evenly, and gives you the flexibility to cook two different foods at two different temperatures simultaneously — a genuine advantage when you are making a full meal rather than reheating leftovers. Cosori's TurboBlaze technology is the brand's answer to Ninja's power: it uses a high-speed fan to accelerate air flow, which gives it surprisingly crispy results for a single-basket machine. For chips, chicken wings and roasted veg, both deliver. The Ninja just does more things at once.
If you want something even simpler, the Cosori Pro LE 5L at £89.99 is one of the most beginner-friendly air fryers we have reviewed — a perfect first air fryer if you are not sure how much you will use it.
Build quality and design
Ninja feels premium in hand — solid drawers, chunky buttons, a weighty base that will not slide on your worktop. Cosori is lighter and more compact, with a slicker touchscreen interface that looks good in a modern kitchen. Both are well-made for their price points, but they suit different aesthetics: the Ninja is a workhorse, the Cosori is a neat little appliance. On cleaning, both have non-stick, dishwasher-safe drawers and baskets, so maintenance is minimal either way.
Running costs
Air fryers are cheap to run full stop. Both draw between 1,400 and 1,800W, and because they cook faster in a smaller space than a conventional oven, they typically cost a few pence per meal. Our full breakdown in the air fryer running-cost guide shows the annual savings versus a standard oven — and the air fryer vs oven comparison puts the saving at roughly £50–£80 a year for regular use. There is no meaningful difference between Ninja and Cosori on energy — buy on features and capacity, not watts.
Ninja vs Cosori: side by side
| Ninja Foodi MAX Dual Zone AF400UK | Cosori TurboBlaze 6L | |
|---|---|---|
| Typical price | ~£199 | ~£109.99 |
| Capacity | 9.5L (two drawers) | 6L (single basket) |
| Best for | Families, full meals, dual cooking | Couples, compact kitchens, value |
| Cooking zones | Two independent zones + Sync Finish | One |
| Design | Large, solid workhorse | Compact, sleek touchscreen |
| Our rating | 9.5 / 10 | 8.8 / 10 |
Which should you buy?
Buy the Ninja Foodi MAX Dual Zone AF400UK if: you cook for a family, you want two zones running independently, and you value the convenience of everything finishing at the same time. At £199 it is the benchmark air fryer in the UK for a reason — nothing else at this price does as many things as well.
Buy the Cosori TurboBlaze 6L if: you are cooking for one or two, counter space matters, and you want a genuinely excellent air fryer without spending £200. It crisps brilliantly, looks smart, and at £110 it is one of the best-value kitchen gadgets you can buy.
If you want to weigh up Ninja against the other big value brand, our Ninja vs Tower comparison covers the budget dual-zone battle. If you are choosing within the Ninja range itself, our Ninja Crispi vs Ninja Air Fryer comparison weighs the portable glass system against the traditional basket models. Still not sure an air fryer suits you at all? Our honest verdict on whether air fryers are worth it covers the full picture. And for independent lab results on crisping and evenness, the Which? air fryer reviews and the Good Housekeeping best air fryers are useful sense-checks.
Ready to compare the full field? Our air fryer reviews put Ninja, Cosori, Tower, Philips and more side by side so you can match a machine to your kitchen and your budget.
