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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 | Impress | Straight Teeth Direct | |
|---|---|---|---|
| Treatment | |||
| ApproachA scan records your teeth; it is not a dental examination. | Dental exam In-person and remote check-ins | Home kit Remote check-ins | |
| How it startsAn impression kit or a scan records the teeth. Check whether a dentist examines you in person. | A free clinic visit with an examination, a 3D scan and a quote. | Free e-consultation, then a £69 SmileBox for home impressions, then the £1,790 StraightBox after you see the plan. | |
| Check-ins and monitoring | At one of eight Impress clinics in England to start, fit and finish, with photo check-ins in the app between visits. | Remote photo screening and monthly photos in the app. The public pages do not explain where a physical examination takes place. | |
| Who plans and supervises | A GDC-registered dentist at an Impress or partner clinic. | Unnamed dentist for the first photos, then an assigned dentist or orthodontist who plans and monitors treatment. No GDC number is published. | |
| Cost | |||
| Treatment priceCheck whether a price covers one arch or both, and what it includes. | 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 | Listed price£1,859 For both arches. Includes £69 for the SmileBox impression kit and plan. Checked 26 October 2026 | |
| Paying monthly | Not confirmed | Three instalments: £1,887 in total, or £1,956 with the SmileBox impression kit and plan In-house monthly: £1,931 in total, or £2,000 with the SmileBox impression kit and plan Totals are calculated from the published payments. | |
| Aftercare | |||
| Retainers | Sold separately. Impress's retainer subscription is from £300 a year; another dentist can also make retainers. | One removable set included. Annual retainer plan £239 in year one, then £179 a year. A fixed retainer is not included. | |
| RefinementsConditions often apply. The review has the detail. | All the Invisalign aligners you need are included, along with attachments and IPR. | The pricing page includes one round if your dentist prescribes it; the FAQ says all extra aligners are covered. Lost or broken aligners are replaced. | |
| Our review | |||
| Still to confirm | Nothing specific flagged; other details may still be unconfirmed | Named prescribing clinician, and where a physical clinical examination takes place. Whether refinements are limited to one round (pricing page) or unlimited (FAQ). Humm APR and total repayable. Whether a 3D scan can still be booked. The refund page still mentions a £79 scan deduction. | |
| Full review | Updated 26 October 2026 Read the Impress review | Updated 26 October 2026 Read the Straight Teeth Direct review |
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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.
