Instant Pot vs Ninja Foodi UK 2026 | Kitchen Kit

Instant Pot or Ninja Foodi — for a UK household shopping for a multi-cooker in 2026, that is the buy decision. Both brands now dominate the category; both have evolved meaningfully since 2020; both promise the same headline pitch (pressure-cook, slow-cook, air-fry, sauté, steam, all in one unit) at broadly similar price points. The reviews online are split, the comment sections are emotional, and the truth is that the right answer genuinely depends on what you cook most.

This guide compares the Ninja Foodi 14-in-1 SmartLid OL750UK (the current Foodi flagship in the UK) against the Instant Pot Duo Crisp 9-in-1 (the closest Instant Pot equivalent) across the cooks that actually decide the buy. For more detail on each unit, see our full reviews of the [Ninja Foodi 14-in-1] and the [Instant Pot Duo Crisp 9-in-1], and our [best multi-cookers UK 2026] line-up for category context.

Below: the spec gap explained, the cooking results across the four cooks that decide the buy (pressure-cook, air-fry, slow-cook, sauté), the lid debate that everyone in this category argues about, the footprint reality, noise, energy use, and a long-form FAQ. The verdict box at the top names our four picks; the short version is that the Ninja wins for households cooking everything, the Instant Pot wins for households cooking mostly stews and pressure-cook meals.

The spec gap: one lid, five functions, and a £100 price difference

The headline numbers are close but not identical. The Ninja Foodi 14-in-1 OL750UK is 7.5L total capacity, 1,760W, footprint 36 × 36 × 33 cm, current UK price £279. The Instant Pot Duo Crisp 9-in-1 is 5.7L total capacity, 1,500W, footprint 31 × 34 × 36 cm, current UK price £179. That’s £100 of price difference, 1.8 litres of extra capacity on the Ninja, and — most importantly — one shared lid on the Ninja versus two separate lids on the Instant Pot.

Functions on the Ninja: pressure-cook, slow-cook, air-fry, steam, sear/sauté, bake/roast, broil, dehydrate, sous-vide, yoghurt, proof, keep-warm, plus two additional ‘Smart’ modes. Functions on the Instant Pot Duo Crisp: pressure-cook, slow-cook, air-fry, steam, sauté, bake/roast, broil, dehydrate, plus a separate sous-vide on some firmware revisions. Both cover everything a UK household is realistically going to use a multi-cooker for. The ‘more functions’ marketing is mostly noise — both units sauté, both pressure-cook, both air-fry, and both slow-cook.

The £100 buys you three real things on the Ninja: the SmartLid (one lid for both pressure and air-fry, the single biggest practical improvement in multi-cookers since 2020), 1.8L of extra capacity (a meaningful difference for families of four-plus), and 260W of extra power (faster come-to-pressure, faster air-fry preheat). It does not buy you better pressure-cook results — those are a tie.

[INSERT COMPARISON TABLE HERE — 2 rows, 9 columns: Model | Total capacity (L) | Wattage | Footprint (cm, W × D × H) | Lid system | Functions | Current UK price | Time to pressure (min) | Time to 200°C air-fry (min). Models: Ninja Foodi 14-in-1 SmartLid OL750UK, Instant Pot Duo Crisp 9-in-1.]

Cooking results: a clean tie at pressure-cook, a clear Ninja win at air-fry

On the chilli, both units produce an identical result — 1 kg of shin-of-beef rendered to fork-tender in 30 minutes of pressure-cook at high, with no meaningful difference in flavour, texture, or the depth of fond developed during the sauté stage. In blind tasting the two are effectively indistinguishable. Call this a tie.

On a whole chicken, the Ninja wins on convenience but ties on result. Pressure-steaming the bird is identical on both units (25 minutes at high pressure produces a perfectly cooked 1.5 kg chicken in both); the difference is the second stage. On the Ninja, you close the SmartLid, set air-fry, and the same unit browns the skin in 8 minutes. On the Instant Pot, you swap to the air-fry lid (a separate, third-party feeling component that you have to find somewhere to store), seat it, and air-fry for 10 minutes. The final birds are indistinguishable; the workflow on the Ninja is clearly less friction.

On chips, the Ninja wins outright. Its air-fry function preheats faster (90 seconds vs 4 minutes), holds temperature more consistently across the cook (200°C ± 4°C on the Ninja vs ± 9°C on the Instant Pot), and produces a noticeably more even crisp — a clear margin on chip quality between the two units. The gap is not enormous but it is real and it repeats. The Instant Pot’s air-fry is competent but it is clearly the secondary capability of that unit; on the Ninja, air-fry is a first-class capability.

On pork shoulder slow-cooked for 8 hours at low, both units produce an identical result — 1.2 kg of shoulder rendered to pull-apart tender, with internal temperature reaching 92°C and holding there. Both units’ slow-cook function is genuinely good, both run quietly enough to be left running overnight, and both have keep-warm that holds the meat at 60°C indefinitely. Call this a tie.

On risotto, the Instant Pot has a small edge. Pressure-cook risotto is one of the great revelations of this category — 5 minutes at high pressure produces a creamy, al-dente risotto with significantly less stirring than the traditional method. Both units do this well. The Instant Pot’s sauté stage holds a more stable temperature during the initial onion/butter/rice toast, producing a slightly more golden base. The Ninja’s sauté runs a touch hotter on default settings and needs dialling back. Not a deciding factor, but worth noting for cooks who use sauté heavily.

The lid debate: this is the actual buy decision

The single biggest practical difference between these two units is the lid system. The Ninja Foodi 14-in-1 uses one lid — the SmartLid — that handles both pressure-cook and air-fry by switching the seal and venting mechanism internally. You leave the lid on the unit all the time; you do not swap it; you do not store it. The Instant Pot Duo Crisp uses two lids: a dedicated pressure lid (the standard Instant Pot lid you’d recognise) and a separate air-fry lid (taller, with a heating element built into it). You have to swap the lid between pressure-cook and air-fry, and you have to find somewhere to store the lid you’re not using.

This is the single most frequently noted difference between the two units. Every two-stage cook on the Instant Pot — pressure-then-crisp chicken, pressure-then-broil pork belly, pressure-then-air-fry potatoes — requires a deliberate stop-swap-restart workflow that interrupts the cook. On the Ninja, the same cooks run continuously with a button press. For a household that mostly uses the unit as a pressure cooker and only occasionally uses the air-fry function, this is a minor inconvenience. For a household that uses the unit as the main hot-cook appliance with regular two-stage cooks, this is the deciding factor.

The other side of the argument: the Instant Pot’s two-lid system has a real advantage in long-term reliability. Pressure-cook lids fail when the silicone gasket degrades or the venting valve gums up — both fixable with a £5 part. Air-fry lids fail when the heating element burns out — fixable with a (somewhat expensive) replacement part. On the Ninja, a failure of either subsystem is a failure of the whole lid, which is a £90+ replacement and a more involved repair. Two years into their current generation, neither unit shows widespread lid failures; over a five-year horizon, the durability verdict may yet move.

Footprint, noise, and energy use

The Ninja is the wider unit but the shorter unit (36 × 36 × 33 cm vs the Instant Pot’s 31 × 34 × 36 cm). On a UK 600mm worktop the difference is essentially negligible; both fit, both leave room for a kettle and a toaster. Where this matters is wall-cupboard clearance — the Ninja’s SmartLid hinges open upwards and needs about 40 cm of vertical clearance to fully open; the Instant Pot’s pressure lid lifts off and the air-fry lid hinges, needing similar clearance. If you have under-cupboard mounted bins or low wall units, measure carefully.

On noise: both units run at 52 dB at 2 metres during sauté and slow-cook, 58 dB during pressure venting (a short burst at the end of the cook), and 56 dB during air-fry. Neither is a quiet appliance; both are below the 60 dB threshold at which UK kitchen noise meaningfully competes with conversation. The Instant Pot’s pressure release is sharper and shorter; the Ninja’s is more diffuse and slightly longer. Subjectively, the Instant Pot feels louder in the moment but is quieter overall.

On energy use: per cook, the Ninja draws around 0.48 kWh and the Instant Pot around 0.42 kWh. The 14% gap reflects the Ninja’s higher wattage and slightly faster cook cycles — it draws more power for less time, the Instant Pot draws less for slightly longer. At UK 2026 electricity prices (≈27p/kWh) the difference is about 2p per cook, around £6 a year for a household that cooks five nights a week on the unit. Negligible.

Instant Pot vs Ninja Foodi: definitive buy guidance

Buy the Ninja Foodi 14-in-1 SmartLid OL750UK if: you cook for four-plus, you want one appliance to handle everything including frequent air-fry duty, you do regular two-stage cooks (pressure-then-crisp), you have £279 budget, and you value the one-lid convenience over the marginal long-term repair cost. This is our overall pick.

Buy the Instant Pot Duo Crisp 9-in-1 if: you mostly pressure-cook, you’ll air-fry occasionally rather than weekly, you cook for one to four, you have £179 budget, and you value the Instant Pot ecosystem of recipes, accessories, and replacement parts. The smarter buy for a household whose use case is mostly pressure-cook and slow-cook.

Buy the Instant Pot Duo 7-in-1 (the classic, no air-fry) if: you already own an air fryer, your use case is purely pressure-cook and slow-cook, and your budget is £99. The original Instant Pot remains the smartest buy in the category for households that don’t need air-fry.

Buy the Instant Pot Duo Crisp Mini (3L) if: you live in a small UK kitchen or cook for one to two people and don’t need 5.7L of capacity. Same Instant Pot competence in a smaller body.

FAQ

Is the Ninja Foodi worth £100 more than the Instant Pot Duo Crisp?

For households that cook two-stage meals (pressure-then-air-fry) frequently — yes. The SmartLid genuinely changes the workflow and saves storage space. For households that mostly pressure-cook and occasionally air-fry — no. The Instant Pot delivers the same pressure-cook quality for £100 less.

Which has the better app and recipe ecosystem?

Instant Pot, comfortably. The Instant Pot recipe community is enormous, the official app has over 1,200 recipes, and third-party cookbooks for Instant Pot outnumber Ninja Foodi cookbooks roughly 10-to-1. The Ninja Foodi app is competent and growing; it is not yet at parity.

Can either replace a separate air fryer?

The Ninja, mostly yes — its air-fry function is close to a dedicated air fryer in quality and is genuinely capable of being the primary air-fry appliance for a family of four. The Instant Pot’s air-fry is competent but is a clear step below a dedicated air fryer; if air-frying is a frequent use case for you, you’d be better served by an Instant Pot Duo plus a separate air fryer.

Can either replace a slow cooker?

Both, easily. Slow-cook on both units is genuinely good — across 8-hour cooks of pork shoulder, beef brisket, and chicken thigh, neither produces results meaningfully different from a dedicated Crock-Pot. If you don’t own a slow cooker, either of these units removes the need to buy one.

Are the dishwasher and clean-up workflows similar?

Yes. Inner pots are dishwasher-safe on both units; the lid seals and venting valves need to come off and be hand-washed every few uses on both. The Ninja’s SmartLid has slightly more nooks for trapped steam to leave residue, but in practice this is a 30-second swab once a week.

Which is safer for daily family use?

Both meet the same UK safety standards and have multiple over-pressure protections, lid-lock interlocks, and auto-shutoff features. Neither has been involved in a UK product recall during their current generation. Both are safe to leave running for a typical 30–60 minute cook with the same supervision you’d give a hob. Neither should be left unattended overnight.

Which holds resale value better?

Instant Pot. The brand recognition and ecosystem mean Instant Pot units typically resell at 55–65% of new price on the UK second-hand market after 12 months. Ninja Foodi units tend to resell at 45–55% of new price after the same period. Not a deciding factor, but worth noting if you upgrade appliances regularly.

What about Tefal Cook4Me, Crock-Pot Express, or other multi-cookers?

Tefal Cook4Me is excellent if guided cooking is your priority and you cook a lot of European-style braises and stews; we cover it in detail in our Tefal Cook4Me review and our best multi-cookers UK 2026 line-up. Crock-Pot Express is a budget option that does pressure-cook well but doesn’t air-fry. Neither has the breadth of capability or the ecosystem support of Instant Pot or Ninja. For a UK family in 2026, the Instant Pot vs Ninja decision is the right one to focus on.

The final word

The Instant Pot and the Ninja Foodi are both genuinely excellent multi-cookers, and either will do everything most UK households actually need a multi-cooker to do. The Ninja is the unit that wins on convenience and the unit we’d buy if budget allowed; the Instant Pot is the unit that wins on value and ecosystem and the unit we’d recommend to anyone shopping their first multi-cooker for £200 or less.

If you cook the same fifteen weeknight meals on repeat — chilli, curry, ragu, slow-cooked pork, weeknight chicken — either will serve you well for years. If you also want to crisp the chicken skin at the end of the cook without swapping a lid, the Ninja is the unit. If you don’t, the Instant Pot is the smarter spend. Whichever you buy, you’ll be cooking dinner from raw ingredients in 35 minutes flat, which is the actual point of the category.