IMPOSSIBREW vs ON Beer
IMPOSSIBREW vs ON Beer: a bigger can, about 29% less per 100ml.
ON Beer Lager costs 79.5p per 100ml in its largest pack. IMPOSSIBREW Lager costs 56.8p, or 48.3p on subscription (checked 3 November 2026). The bigger difference is what each beer is built to do.

Quick answer
ON Beer and IMPOSSIBREW are both 0.5% alcohol-free beers with added plant ingredients, but they are built for different jobs. ON's blend leans towards a lift: guarana, ginseng, maca, damiana and muira puama. IMPOSSIBREW's Social Blend™ is built to help you unwind: L-theanine, ashwagandha and magnesium. IMPOSSIBREW also gives you a bigger 440ml can for less money per 100ml. ON has fewer calories and comes in 330ml glass bottles.
Ratings compared
Checked 5 Nov 2026
| 1 | IMPOSSIBREW | 4.4 | 1,036 reviews | |
| 2 | Lucky Saint | 4.3 | 3,734 reviews | |
| 3 | BrewDog | 4.0 | 2,600 reviews | |
| Not ranked: fewer than 1,000 reviews | ||||
| ON Beer | 4.3 | 29 reviews | ||
Brands with 1,000+ Trustpilot reviews are ranked. TrustScores and review counts from each brand's Trustpilot page, checked 5 Nov 2026.
Price per 100ml
An ON bottle holds 330ml. An IMPOSSIBREW can holds 440ml, a third more beer. Compare the same amount of beer and IMPOSSIBREW is about 29% cheaper.
| Largest pack, one-off | IMPOSSIBREW Lager | ON Beer Lager |
|---|---|---|
| Pack | 40 × 440ml (17.6 litres) | 24 × 330ml (7.92 litres) |
| Price | £100.00 | £63.00 |
| Price per can or bottle | £2.50 | £2.63 |
| Price per 100ml | 56.8p | 79.5p |
Subscribe to IMPOSSIBREW and it drops to 48.3p per 100ml (15% off). ON's Lager page offers no subscription.
Prices from each brand's own website, checked 3 November 2026. Delivery, first-order codes and offers excluded. Prices change.
What's in the bottle and the can
ON Beer Lager lists water, malt, hops and yeast plus a herbal extract blend: ginseng, rhodiola, maca, guarana, damiana, muira puama, liquorice and black pepper. ON says each bottle carries 11g of botanicals, including 300mg of guarana. Guarana seeds naturally contain caffeine, as ON's own site explains. The label also carries a liquorice warning for people with high blood pressure.
IMPOSSIBREW Enhanced Lager is brewed with Social Blend™: L-theanine, ashwagandha root extract, magnesium citrate, citrus extract, vitamin B1 and soluble plant fibre, 375mg per 100ml (1,650mg per can). There is no guarana in it.
So the choice is mostly about what you want from the evening. ON's tagline is "Drink ON". Ours is for the moment you want to switch off. In our own 2024 customer survey, 72% of 775 responses said they felt somewhat, very or entirely relaxed after drinking IMPOSSIBREW. That is self-reported, not a clinical result.
Side by side
| IMPOSSIBREW Enhanced Lager | ON Beer Lager | |
|---|---|---|
| Pack | 440ml can | 330ml glass bottle |
| ABV | 0.5% | 0.5% |
| Price per 100ml (largest pack, one-off) | 56.8p | 79.5p |
| Subscription | Yes, 15% off | Not on the Lager |
| Functional blend | Social Blend™, 1,650mg per can | Botanical blend, 11g per bottle (ON's figure) |
| Guarana (natural caffeine) | No | Yes, 300mg per bottle |
| L-theanine, ashwagandha, magnesium | Yes | No |
| Calories | 17 kcal per 100ml (75 per can) | 12 kcal per 100ml (40 per bottle) |
| Sugar | Under 1g per 100ml | 0.4g per 100ml |
| Gluten | Gluten-free (below 20ppm) | Sold as gluten-free |
| Vegan | Yes | Yes |
FAQs
Is IMPOSSIBREW cheaper than ON Beer?
Per 100ml, yes. On the largest one-off packs IMPOSSIBREW is 56.8p per 100ml and ON Beer is 79.5p, about 29% cheaper for the same amount of beer (checked 3 November 2026). IMPOSSIBREW on subscription is 48.3p.
Does ON Beer contain caffeine?
ON Beer contains guarana, 300mg per bottle by ON's own figures. Guarana seeds naturally contain caffeine. IMPOSSIBREW contains no guarana.
What is in Social Blend™?
L-theanine, ashwagandha root extract, magnesium citrate, citrus extract, vitamin B1 and soluble plant fibre. 375mg per 100ml, which is 1,650mg in each 440ml can.
Which has fewer calories?
ON Beer Lager: 12 kcal per 100ml. IMPOSSIBREW Lager: 17 kcal per 100ml.
Is IMPOSSIBREW alcohol-free?
Our beers are 0.5% ABV. Over-18s only. Not recommended during pregnancy or breastfeeding, with certain medical conditions or alongside certain medicines.
About IMPOSSIBREW
IMPOSSIBREW makes alcohol-free beer brewed with Social Blend™ (L‑theanine, ashwagandha, magnesium and vitamin B1), developed with pharmacologists at Durham University, for the calm, relaxed feeling of a drink without the alcohol.
Gold Medal for our Lager at the London Beer Competition, the first alcohol‑free beer to win Gold there. Judges noted citrus, light lemon and tropical aromas with a crisp finish.
Voted the UK's best-tasting alcohol‑free lager at the World Beer Awards (Gold and Country Winner). Enhanced Lager and Enhanced Hazy Pale also each hold a Great Taste Award.
60% fewer calories than a standard 5% lager. Enhanced Lager is gluten-free (below 20ppm) and vegan.
As seen on BBC's Dragons' Den, with more than 100,000 customers.
*Highest TrustScore among alcohol‑free beer brands with over 1,000 Trustpilot reviews, checked 28 October 2026. See the scores.

