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Add up to 3 clear aligner providers in the UK to see them side by side. Details come from our reviews; open a review for sources and the full picture.
| Detail | Six Month Smiles | Impress | |
|---|---|---|---|
| Treatment | |||
| ApproachA scan records your teeth; it is not a dental examination. | Dental exam In-person check-ups | Dental exam In-person and remote check-ins | |
| How it startsAn impression kit or a scan records the teeth. Check whether a dentist examines you in person. | A consultation and records appointment with a trained Six Month Smiles dentist, who may offer clear braces, aligners or both. | A free clinic visit with an examination, a 3D scan and a quote. | |
| Check-ins and monitoring | In the practice. How often depends on whether you have braces or aligners, so ask your dentist. | At one of eight Impress clinics in England to start, fit and finish, with photo check-ins in the app between visits. | |
| Who plans and supervises | Your dentist. The company says plans are made by specialists and overseen by an orthodontist. | A GDC-registered dentist at an Impress or partner clinic. | |
| Cost | |||
| Treatment priceCheck whether a price covers one arch or both, and what it includes. | Personal quoteQuote from your practice No patient price is published. Checked 26 October 2026 | Set after assessment£1,990 to £3,990 The clinician decides which plan applies after an assessment. The provider does not say whether this covers one arch or both. Checked 26 October 2026 | |
| Aftercare | |||
| Retainers | Ordered at the end of treatment. Ask whether they are in your fee. | Sold separately. Impress's retainer subscription is from £300 a year; another dentist can also make retainers. | |
| RefinementsConditions often apply. The review has the detail. | For aligners, the company's standard case includes two refinements within two years for the dentist; relapse aligners include none. Ask whether your fee includes them. | All the Invisalign aligners you need are included, along with attachments and IPR. | |
| Our review | |||
| Full review | Updated 26 October 2026 Read the Six Month Smiles review | Updated 26 October 2026 Read the Impress review |
Add another provider
In alphabetical order. This is not a ranking.
Reviewed but not available to compare
- Diamond Whites Impress acquired Diamond Whites, and new cases are now quoted at an Impress clinic.
- NewSmile Its aligners could not be ordered online when we checked on 27 October 2026: the order button led to a missing page, and the shop listed no aligners.
Who is included. A provider can be compared when we have a current review, new patients can start with it in the UK, and we could confirm how treatment starts and how progress is checked. A missing price never rules a provider out: practice-set fees are shown as practice fees or as a quote. Being listed is not a recommendation.
Providers that have closed, changed or could not be confirmed are listed under Looking for another provider? on the reviews page. Prices and terms change, so confirm them with the provider before you pay.
Not sure where to start? Our guide to the best clear aligners in the UK explains which providers we would look at first, and why.
