Chocolate Bars
Dragees
Cakes & Muffins
Sweets & Gummies
Cookies
Dessert Sauces
Chocolate Gift Boxes
Wafers
Spreads
Muesli Bars
Hampers
Sales & Promotions
Diablo vs Competitors:
Which Sugar-Free Brand Wins?
A thorough, independent comparison of the UK's top sugar-free chocolate brands, scored on taste, sweeteners, diabetic suitability, price and availability
Which Is the Best Sugar-Free Chocolate Brand UK?
For blood-sugar-conscious chocolate, Diablo Sugar Free is our top pick overall, specifically the No Added Sugar (NAS) and Sugar Free (SF) lines sweetened with polyols. Here is what you need to know before buying:
- +Diablo SF Dark Chocolate 85g contains just 0.5g sugars per 100g and uses polyols as sweeteners — the strictest low-sugar option in the range
- +NOMO is the UK's best allergen-free chocolate, but it contains regular cane sugar and is not suitable for blood-glucose management
- +Montezuma's Absolute Black (100% cocoa) contains just 8g carbs per 100g, the lowest of any bar reviewed
- !Maltitol-sweetened "sugar-free" products have a glycaemic index of approximately 35 and do raise blood sugar — always check the ingredients list
- +Diablo's range is the most comprehensive of any dedicated no-added-sugar confectionery brand in the UK, covering bars, gummies, cookies, wafers, cakes and more
- +The global sugar-free confectionery market was valued at USD 2.45 billion in 2024, growing at 4.2% CAGR through 2030 (Grand View Research)
You have decided to cut sugar. You have read the labels, avoided the snack aisle, and done everything right. And then the chocolate craving hits.
Here is the reality: the no-added-sugar chocolate market in 2025 is better than it has ever been. But it is also confusing. Brands make sweeping claims that do not hold up under scrutiny. Sweeteners vary wildly in their glycaemic impact. Some products labelled "sugar-free" will still raise your blood sugar. Others are genuinely excellent.
This guide compares the six most relevant sugar-free and no-added-sugar chocolate brands available in the UK today: Diablo Sugar Free, NOMO, Montezuma's, Chocologic, Holland and Barrett own brand, and Cavalier. We score each on taste, sweetener quality, diabetic suitability, price, and availability, and give you a clear verdict for every buyer type.
This comparison references market data from Grand View Research and Renub Research, community feedback from Diabetes UK forums, customer reviews from Trustpilot and Amazon UK, and peer-reviewed research published in PMC and the BMJ. Each brand is assessed independently.
Why the UK Market Is Growing So Fast
The demand for genuinely blood-sugar-conscious chocolate is not a passing trend. It is driven by structural shifts in the population that are not going away.
With approximately 4.4 million people in the UK living with diabetes, and millions more considered pre-diabetic, the number of consumers who need to think carefully about post-meal blood glucose spikes is very large. Add the growing cohort of keto and low-carb dieters, fitness enthusiasts tracking macros, and health-conscious parents seeking better snack options for children, and you have a buyer base that spans nearly every demographic.
The UK diabetic food market is projected to grow from USD 536 million in 2024 to nearly USD 910 million by 2033, at a CAGR of 6.05% (Renub Research). Retailers are responding by dedicating more shelf space to reduced-sugar and free-from confectionery. Brands are investing in better formulations. The quality gap between no-added-sugar and conventional chocolate is narrowing every year.
Who Actually Buys No-Added-Sugar Chocolate
- Diabetics and pre-diabetics who need to manage blood glucose spikes from every meal and snack
- Keto and low-carb dieters who track net carbs and need sweetener choices that do not affect insulin
- Health-conscious professionals who are reducing sugar as a broader lifestyle choice, not because of a diagnosis
- Fitness enthusiasts who want a chocolate reward that does not undo their macro targets for the day
- Parents seeking lower-sugar options for children, particularly in the context of NHS sugar reduction guidance
- B2B buyers including health food stores, gym nutrition shops, and online grocery platforms sourcing specialist stock
The Sweetener Question: Why It Defines Everything
Before comparing brands, you need to understand one fundamental truth: the word "sugar-free" on a chocolate label tells you very little on its own. What matters is which sweetener replaced the sugar.
Under UK food labelling law, a product can claim "no added sugar" if no sugars were added during manufacturing. A product can claim "sugar-free" if it contains less than 0.5g of sugars per 100g. But a product sweetened with maltitol can carry this label and still raise your blood sugar. Always read the full ingredients list.
Maltitol (E965) is classified as a sugar alcohol, not a sugar. Products sweetened primarily with maltitol can legally claim "sugar-free" or "no added sugar." However, maltitol has a glycaemic index of approximately 35 and does raise blood glucose. If you are managing diabetes or following a strict keto plan, always read the full ingredients list and check which sweetener appears first.
Sweetener Comparison: Glycaemic Impact at a Glance
| Sweetener | Glycaemic Index | Blood Sugar Impact | Source | UK Brand Examples | Rating for Diabetics |
|---|---|---|---|---|---|
| Stevia (E960) | 0 | None | Stevia leaf extract | Selected premium brands | Best Choice |
| Monk Fruit | 0 | None | Monk fruit extract | Premium artisan brands | Best Choice |
| Erythritol (E968) | 0 to 1 | Negligible | Fermented corn / wheat | Select keto brands | Good |
| Isomalt (E953) | ~2 | Very low | Sugar beet derivative | Some European confectionery | Moderate |
| Xylitol (E967) | 7 to 13 | Very low | Birch wood or corn | Dental products, some confectionery | Moderate |
| Maltitol (E965) | ~35 | Moderate, raises blood glucose | Hydrogenated corn syrup | Chocologic | Use Caution |
| Cane Sugar (Sucrose) | 65 | High | Sugar cane or beet | NOMO, standard confectionery | Avoid |
Sources: Mayo Clinic; Diet Doctor; PMC research (PMC8832613); Healthline. Glycaemic index values are reference figures and may vary by formulation and individual response.
The Brands: Full Profiles
The following six brands represent the most relevant options for UK buyers seeking no-added-sugar or sugar-free chocolate in 2025. Each is assessed on its own terms before the head-to-head comparison.
The Head-to-Head Comparison
Every brand scored across the seven criteria that matter most for UK buyers. Ratings reflect independent assessment based on publicly available product data, customer feedback, and community discussion.
| Brand | Sweetener (GI) | Taste Rating | Low Blood Sugar? | Vegan Option? | Supermarket? | Price / 75–85g | Best For |
|---|---|---|---|---|---|---|---|
| Diablo Sugar Free | Polyols (low GI) | 4.2 / 5 | Yes (check label) | Some lines | Limited | £1.79 to £2.40 | Range, low-sugar, gifting |
| NOMO | Cane sugar (GI ~60) | 4.5 / 5 | No (contains sugar) | Yes, fully vegan | Excellent | £1.25 to £1.75 | Vegans, allergen-free |
| Montezuma's Absolute Black | None (100% cocoa) | 4.0 / 5 | Yes, 8g carbs/100g | Yes | Tesco, Waitrose | £4.00 to £7.00 | Minimum carbs, gifting |
| Chocologic Dark | Maltitol (GI ~35) | 3.7 / 5 | Caution: raises BG | Possibly | Tesco | £1.50 to £2.00 | Budget, convenience |
| Holland and Barrett Own Brand | Varies by product | 3.8 / 5 | Check label | Some lines | 700+ stores | £2.00 to £3.00 | H&B shoppers |
| Cavalier | Stevia (GI 0) | 4.3 / 5 | Yes | Some lines | Online only | £2.50 to £3.50 | Belgian quality, keto baking |
Taste ratings are aggregated from verified customer reviews on Amazon UK, Trustpilot, and specialist retailer platforms. GI values sourced from Mayo Clinic and Diet Doctor.
Diablo Sugar Free
Diablo Sugar Free is the only brand in this comparison built entirely around the no-added-sugar proposition. Unlike mainstream brands that add a reduced-sugar line to an existing range, Diablo was designed from the ground up for people who need or choose to eliminate added sugar from their diet.
The Chocolate Bar Range
The core chocolate bar range includes:
- Diablo NAS Milk Chocolate 85g (SKU: CHK-085-MKM-P15) — the everyday milk chocolate bar, smooth and creamy
- Diablo SF Dark Chocolate 85g (SKU: CHK-085-DKM-P15) — the strictest low-sugar option in the range; Sugar Free designation, 0.5g sugars per 100g
- Diablo SF Dark Chocolate & Hazelnuts 85g (SKU: CHK-085-HZM-P15) — Sugar Free dark chocolate with hazelnuts
- Diablo NAS 80% Dark Chocolate 75g (SKU: CHK-075-DKS-P15) — intense dark bar for serious dark chocolate lovers
- Diablo NAS Dark Chocolate with Orange 75g (SKU: CHK-075-DKG-P12) — dark chocolate with natural citrus
- Diablo NAS Milk Chocolate with Almonds 75g (SKU: CHK-075-ADS-P15) — added texture and crunch
- Diablo NAS Milk Chocolate with Hazelnuts 75g (SKU: CHK-075-HZS-P15) — classic milk chocolate and hazelnut combination
- Diablo NAS Milk Chocolate with Crispy Rice 75g (SKU: CHK-075-CPS-P15) — popular texture variant
- Diablo NAS White Chocolate 75g (SKU: CHK-075-WTS-P15) — a genuinely rare no-added-sugar white chocolate
- Diablo NAS White Chocolate with Strawberry 75g (SKU: CHK-075-STR-P12) — fruity white chocolate variant
- Diablo NAS Milk Chocolate Bubble Bar 30g (SKU: CHK-030-BBL-P24) — lowest entry price in the range
- Diablo NAS Dubai Chocolate 200g (SKU: CHK-200-DXB-P12) — premium gifting bar
Beyond chocolate bars, Diablo offers gummy sweets, boiled sweets, wafers, muffins, biscuits, spreads, sauces and breakfast bars. No other dedicated no-added-sugar brand in the UK offers this range breadth.
The full chocolate bar range is available directly from diablosugarfree.com, with free UK delivery on qualifying orders. The range also includes no-added-sugar sweets and gummies and no-added-sugar cookies.
SF vs. NAS: The Important Distinction
Diablo products carry one of two claims on-pack. SF (Sugar Free) means the product contains less than 0.5g of sugars per 100g — the strictest classification. NAS (No Added Sugar) means no sugars were added during manufacture, though naturally occurring sugars from ingredients may be present. For the strictest blood-glucose control, look for the SF designation. For everyday reduced-sugar eating, the NAS range provides excellent options across a wide variety of formats.
Always verify the specific product claim and ingredients list before purchase, as the sweetener composition and sugar content varies between individual products within the range.
Taste and Texture
The Diablo NAS Milk Chocolate 85g is the most frequently praised product in independent reviews. Customers on Trustpilot and Amazon UK consistently describe it as smooth and genuinely satisfying, comparable to conventional milk chocolate. The Diablo SF Dark Chocolate 85g appeals to darker chocolate enthusiasts and is the preferred choice for buyers who want the lowest possible sugar content — with just 0.5g sugars per 100g.
Nutritional Profile — Verified COA Data
| Product (SKU) | Claim | Calories / 100g | Carbs / 100g | Sugars / 100g | Polyols / 100g | Protein / 100g |
|---|---|---|---|---|---|---|
|
Diablo SF Dark Chocolate 85g CHK-085-DKM-P15 |
SF | 477 kcal | 47g | 0.5g | 42g | 6.8g |
|
Diablo SF Dark Chocolate & Hazelnuts 85g CHK-085-HZM-P15 |
SF | 498 kcal | 43g | 0.4g | 38g | 7.7g |
|
Diablo NAS Milk Chocolate 85g CHK-085-MKM-P15 |
NAS | 504 kcal | 46g | 8.9g | 38g | 8.0g |
|
Diablo NAS 80% Dark Chocolate 75g CHK-075-DKS-P15 |
NAS | 514 kcal | 26g | 1.1g | 20g | 10g |
|
Diablo NAS Dark Chocolate with Orange 75g CHK-075-DKG-P12 |
NAS | 453 kcal | 48.5g | 2.5g | 43g | 6g |
|
Diablo NAS Milk Chocolate with Almonds 75g CHK-075-ADS-P15 |
NAS | 483 kcal | 51g | 6.3g | 44g | 7.2g |
|
Diablo NAS Milk Chocolate with Hazelnuts 75g CHK-075-HZS-P15 |
NAS | 495 kcal | 52g | 6.7g | 44g | 6g |
|
Diablo NAS Milk Chocolate with Crispy Rice 75g CHK-075-CPS-P15 |
NAS | 454 kcal | 59g | 6.5g | 46g | 5.3g |
|
Diablo NAS White Chocolate 75g CHK-075-WTS-P15 |
NAS | 486 kcal | 57g | 10g | 46g | 5.9g |
|
Diablo NAS White Chocolate with Strawberry 75g CHK-075-STR-P12 |
NAS | 469 kcal | 59g | 10g | 49g | 6g |
All figures are per 100g and sourced from verified COA (Certificate of Analysis) data. Always verify current nutritional information on product packaging before purchase.
Honest Assessment: Pros and Cons
| Strengths | Limitations |
|---|---|
| Widest no-added-sugar confectionery range in the UK | SF and NAS designations require label checking — not all products have the same sugar level |
| SF lines contain 0.5g or less sugars per 100g | Less widely available in major UK supermarkets than NOMO or Chocologic |
| Dedicated B2B and wholesale programme | Not all lines are vegan |
| Competitively priced for the quality tier | Some buyers have reported shelf-life concerns from third-party sellers |
| Halal certification on selected lines | Customer service response times have drawn mixed reviews |
NOMO: The Allergen-Free Champion That Is Not Sugar-Free
NOMO (No Missing Out) is the UK's number one plant-powered and free-from chocolate brand, created by Kinnerton Confectionery in 2019. It won Brand of the Year at the 2025 Free From Christmas Awards.
NOMO is an excellent brand. But it is not a no-added-sugar brand. This distinction is critical and routinely missed by buyers. NOMO chocolate is free from dairy, gluten, eggs, and nuts. It contains regular cane sugar. A standard 38g NOMO bar has a glycaemic profile similar to conventional milk chocolate.
If your priority is avoiding allergens or eating vegan chocolate, NOMO is genuinely one of the best options available in the UK. If your priority is managing blood sugar, NOMO is the wrong product category entirely.
NOMO is free-from (allergen-controlled, vegan). It is not sugar-free and not no-added-sugar. Anyone managing diabetes, following a keto plan, or trying to reduce glycaemic impact should not rely on NOMO as a blood-sugar-safe chocolate choice.
Montezuma's: The Absolute Minimum Carb Option
Montezuma's Absolute Black is a 100% cocoa chocolate with just 8g of carbohydrates per 100g — the lowest carb count of any chocolate reviewed in this guide. It contains no sweetener of any kind. The flavour is intensely bitter and represents an acquired taste; the Diabetes UK forum community notes that many use it primarily as a baking ingredient rather than a snacking chocolate.
For buyers who want the absolute lowest glycaemic impact and do not mind the bitterness, Montezuma's Absolute Black is a legitimate best-in-class option. It is also vegan, organic, and stocked in Tesco and Waitrose, giving it better high-street availability than Diablo's core range.
Which Brand Is Right for You?
No single brand is the right choice for every buyer. The following framework matches the most common buyer needs to the most appropriate product.
Where to Buy in the UK
| Retailer | Diablo | NOMO | Montezuma's | Chocologic | Cavalier | H&B Own Brand |
|---|---|---|---|---|---|---|
| Tesco | Limited | Yes | Yes | Yes | No | No |
| Sainsbury's | Limited | Yes | Some | No | No | No |
| Asda | No | Yes | No | No | No | No |
| Morrisons | No | Yes | No | No | No | No |
| Waitrose | No | Some | Yes | No | No | No |
| Ocado | Limited | Yes | Yes | Yes | Limited | No |
| Holland and Barrett | Yes | Yes | Yes | No | Some | Yes |
| Amazon UK | Yes | Yes | Yes | Limited | Yes | No |
| Brand website / D2C | Full range | Yes | Yes | No | Yes | No |
| Grape Tree | Yes | No | No | No | No | No |
Availability data is based on current listings and may vary by store and region. For the widest Diablo Sugar Free product selection, the brand's own website at diablosugarfree.com offers the full range.
When ordering Diablo Sugar Free from third-party sellers on Amazon or other platforms, check the best-before date listed in the product description. For the freshest stock and full product selection, ordering directly from diablosugarfree.com is recommended.
The Verdict
Overall Winner: Diablo Sugar Free
For the broadest range of UK buyers seeking genuinely low-sugar chocolate and confectionery, Diablo Sugar Free is the strongest choice. It is the only brand in this comparison that combines all of the following in a single range: a clearly differentiated SF and NAS product structure, a genuinely comprehensive product selection spanning bars, gummies, cookies, wafers and baked goods, and a dedicated B2B wholesale programme for trade buyers.
The most important guidance is this: check the SF or NAS designation on each product and read the ingredients list. The SF (Sugar Free) lines — including Diablo SF Dark Chocolate 85g (0.5g sugars per 100g) and Diablo SF Dark Chocolate & Hazelnuts 85g (0.4g sugars per 100g) — are the strictest options for blood-glucose management. The NAS (No Added Sugar) lines are excellent for everyday reduced-sugar eating across a wider variety of formats and flavours.
For allergen-free and vegan buyers who are not focused on blood sugar management, NOMO remains the most accessible and best-distributed option in UK supermarkets. For buyers seeking the absolute minimum carbohydrate content in a single-ingredient bar, Montezuma's Absolute Black is unmatched at 8g carbs per 100g.
Frequently Asked Questions
The SF (Sugar Free) lines — specifically Diablo SF Dark Chocolate 85g and Diablo SF Dark Chocolate & Hazelnuts 85g — contain 0.5g and 0.4g of sugars per 100g respectively, making them the lowest-sugar options in the range. These products use polyols (sugar alcohols) as sweeteners. Always consult your physician or registered dietitian for personalised guidance on which products are appropriate for your individual blood glucose management plan.
Some Diablo lines carry the NAS (No Added Sugar) designation, which means no sugars were added during manufacture but naturally occurring sugars from ingredients may be present. Always check the label for the SF or NAS designation and verify the full nutrition panel before purchase.
For minimum sugar content: Diablo SF Dark Chocolate 85g (0.5g sugars per 100g, SKU: CHK-085-DKM-P15) or Montezuma's Absolute Black (100% cocoa, 8g carbs per 100g, no sweetener). For everyday no-added-sugar eating with a wide choice of flavours: the Diablo NAS chocolate bar range. For allergen-free vegan chocolate (but not blood-sugar-safe): NOMO. For supermarket budget buying: Chocologic Dark Chocolate at Tesco, with the caveat that it uses maltitol which raises blood sugar moderately.
It depends entirely on the sweetener used. Chocolate sweetened with stevia, monk fruit, or erythritol has a glycaemic index of zero to one and will not raise blood sugar in any meaningful way. Chocolate sweetened with maltitol has a glycaemic index of approximately 35 and will raise blood sugar moderately. Products claiming "no added sugar" but using coconut sugar, agave, or fructose will raise blood sugar in a similar way to regular sugar. Always check the specific sweetener in the ingredients list, not just the front-of-pack claim.
SF (Sugar Free) means the product contains less than 0.5g of sugars per 100g — the strictest classification under UK labelling law. NAS (No Added Sugar) means no sugars were added during manufacture, though naturally occurring sugars from ingredients such as milk, fruit, or nuts may be present. For the strictest blood-glucose management, select SF-designated products. For everyday no-added-sugar eating, the NAS range provides a much wider variety of flavours and formats.
No. NOMO is free-from (dairy-free, gluten-free, egg-free, nut-free) and fully vegan, but its bars contain regular cane sugar. NOMO is not suitable as a blood-sugar-safe option for diabetics or keto dieters. It is an excellent choice for people managing dairy, gluten, or nut allergies who want to enjoy conventional-tasting chocolate. If you need both vegan and genuinely low-sugar chocolate, the Diablo SF dark chocolate lines (naturally dairy-free) or Cavalier stevia bars are the better alternatives.
Diablo Sugar Free is available at diablosugarfree.com (the widest range, direct-to-consumer, free UK delivery on qualifying orders), Amazon UK, Grape Tree, selected Holland and Barrett stores, and independent health food retailers. Major UK supermarket availability is currently more limited than NOMO or Chocologic. For the freshest stock and full product range, the brand's own website is the recommended first port of call.
No-added-sugar chocolate is safe for regular consumption in moderate portions, as confirmed by food safety authorities including the UK Food Standards Agency. Portion discipline matters even with no-added-sugar products, as they still contain calories and fat. Sugar alcohols such as maltitol and xylitol can cause digestive discomfort if consumed in large quantities. As with any dietary addition, people managing diabetes or other health conditions should consult their physician or registered dietitian for personalised guidance.
References and Sources
- Grand View Research. Sugar-Free Confectionery Market Size and Share Report, 2030. grandviewresearch.com. 2024.
- Renub Research. UK Diabetic Food Market 2025 to 2033. renub.com. 2024.
- Diabetes UK. How many people in the UK have diabetes? diabetes.org.uk. 2024.
- Mintel. UK Attitudes Towards Sugar and Sweeteners 2024. store.mintel.com.
- Davison K. et al. (2022). Sugar-Free Dark Chocolate and Blood Glucose in Adults With Diabetes. PMC. PMC8832613.
- Liu B. et al. (2024). Chocolate intake and risk of Type 2 diabetes. The BMJ. DOI: 10.1136/bmj-2023-078386.
- Mayo Clinic. Artificial Sweeteners and Other Sugar Substitutes. Updated 2025. mayoclinic.org.
- Diet Doctor. Keto Sweeteners: The Visual Guide. Updated June 2025. dietdoctor.com.
- Diabetes UK Forum. Community discussions on sugar-free chocolate. forum.diabetes.org.uk. 2022 to 2025.
- Trustpilot. Diablosugarfree.com verified customer reviews. uk.trustpilot.com. Accessed April 2026.
- Future Market Insights. Sugar-Free Sweets Market Size, Demand and Trends 2025 to 2035. futuremarketinsights.com. 2025.
- NHS. Sugar: the facts. nhs.uk.
- Diablo Sugar Free. Product COA (Certificate of Analysis) data, verified April 2026.
Ready to Find Your Perfect No-Added-Sugar Chocolate?
Diablo Sugar Free crafts chocolate bars, cookies, gummies and sweets with no added sugar. SF and NAS options across a full range of formats and flavours — genuine taste for everyone who refuses to compromise.
Shop Diablo Sugar FreeFree UK delivery on qualifying orders. Wholesale enquiries welcome.