Guide
Best Clear Aligners in the UK
Five UK providers worth considering, what each one does differently, and what to check before you pay.
. Researched from our provider reviews; we have not tested these providers. Editorial standards
There is no single best clear aligner for everyone. The right choice depends on how much in-person care you want, how much price certainty you need and how complex your case is, and only a dentist or orthodontist who has examined you can say whether aligners suit your teeth.
If you want a clinician to manage treatment closely, start with Invisalign at a local practice, or Impress if you live near one of its clinics and want a fixed price. If you want a published package with an in-person examination, look at Smile White or Smileie. Straight Teeth Direct is the fully remote option on this list, with the trade-offs that brings.
Invisalign is an aligner system that many practices offer, so its entry is about Invisalign at a practice you choose. The other four are providers that treat you or arrange your treatment; Impress is a clinic chain that itself uses Invisalign. The five are listed from the most in-person care to the least. The order is not a ranking.
The shortlist at a glance
Prices are the providers' own, without any promotion, and were checked on the date shown. Offers are listed separately and played no part in choosing the shortlist.
| Provider or system | Treatment model | Price | What is included | Verified offer |
|---|---|---|---|---|
| InvisalignAligner system | Dental exam · In-person check-upsAn examination and 3D scan with an Invisalign-trained dentist or orthodontist. | £2,000 to £4,100Practice feesChecked 26 October 2026 | Retainers, refinements and finance depend on the practice quote. | No verified current offer |
| ImpressClinic chain using Invisalign | Dental exam · In-person and remote check-insA free clinic visit with an examination, a 3D scan and a quote. | £1,990 to £3,990Set after assessmentChecked 26 October 2026 | Retainers cost extra: Impress's retainer subscription is from £300 a year, or another dentist can supply them. All the aligners you need are included, with no stated number. | No verified current offer |
| Smile WhiteProvider with partner practices | Dental exam · In-person check-upsA free online consultation, then an oral-health check with X-rays, a 3D scan and photos at a partner dental practice. | £1,995 to £3,695Set after assessmentChecked 26 October 2026 | One retainer set is included, and whitening if the dentist says it is suitable. Refinements are included if the dentist says you are clinically eligible. | No verified current offer |
| SmileieProvider with partner practices | Dental exam · In-person and remote check-insOnline screening, then an in-person examination at a partner dental practice, with scans and X-rays where the dentist wants them. | £1,599 to £2,899Set after examinationChecked 27 October 2026 | Two retainer sets are included. Extra aligners depend on the dentist and the package terms. | No verified current offer |
| Straight Teeth DirectRemote provider | Home kit · Remote check-insPhotos and a questionnaire, then home impressions. The public pages do not explain where a physical examination takes place. | £1,859Listed priceChecked 26 October 2026 | One removable retainer set is included in £1,790. The annual retainer plan is £239 in year one, then £179 a year. | No verified current offer |
The shortlist in detail
Invisalign
Aligner system. Made by Align Technology and provided by dentists and orthodontists. You are treated by the practice, which sets the fee.
Consider it if you want a dentist or orthodontist to examine you, plan your case and see you through it, including a more involved case.
Why it is on the list
Invisalign is a system, not a clinic: a dentist or orthodontist who offers it examines and scans you in person before anything is made, and supervises you throughout. Many UK practices offer it, and a clinician can use it for a wider range of cases than at-home aligners are planned for.
Strengths
- Your treating dentist or orthodontist plans and supervises treatment.
- Widely offered, so you can compare quotes from two or three practices.
- Your clinician can use attachments and extra aligners where your case needs them.
Limitations
- It is not the cheapest route, and published fees for the same package differ widely between practices.
- Retainers, refinements and replacement aligners depend on each practice's quote.
- A low Express or Lite price may cover only a short plan.
What to know
The brand matters less than the practice. Ask which Invisalign package you are quoted for, and get refinements, retainers and replacement aligners itemised in writing. If the practice also offers another system, such as Spark or Angel Aligner (see the other systems below), compare quotes for the same case.
- Treatment model
- Dental exam · In-person check-ups
- How it starts
- An examination and 3D scan with an Invisalign-trained dentist or orthodontist.
- Who plans and supervises
- Your treating dentist or orthodontist plans and supervises treatment.
- Price
- £2,000 to £4,100Three UK practices publish both-arch fees from about £2,000 to about £4,100. These are fees at practices we checked, not the provider's price; your practice sets yours after an examination.
Impress
Clinic chain using Invisalign. Impress treats you at its own clinics and publishes its own prices for Invisalign treatment.
Consider it if you live within reach of one of its clinics in England and want Invisalign at a fixed, published price.
Why it is on the list
Impress is a chain of orthodontic clinics that offers Invisalign at published plan prices, lower than many independent practices charge, with every aligner you need included and a dentist's examination before you commit.
Strengths
- A free clinic consultation with an examination, a 3D scan and a quote, with no obligation.
- All the aligners you need, attachments and IPR (reshaping between teeth to make space) are in the plan price.
- Photo check-ins in the Impress app replace most routine visits.
Limitations
- Only eight clinics, all in English cities, and you need at least three visits.
- Retainers cost extra, through Impress's subscription or another dentist.
- Paying by finance adds a lot to the cash price.
What to know
Your dentist decides which plan applies after the examination, and most monitoring is by photos in the app rather than visits. Compare the cash price, after any current offer, with a local Invisalign practice, and add retainers to the budget.
- Treatment model
- Dental exam · In-person and remote check-ins
- How it starts
- A free clinic visit with an examination, a 3D scan and a quote.
- Who plans and supervises
- A GDC-registered dentist at an Impress or partner clinic.
- Price
- £1,990 to £3,990The clinician decides which plan applies after an assessment. The provider does not say whether this covers one arch or both.
Smile White
Provider with partner practices. Smile White sells the package and arranges treatment at partner dental practices.
Consider it if you want a dentist to examine you in person but would rather pay a fixed package price than ask a practice for a quote.
Why it is on the list
Smile White arranges treatment through partner dental practices. A dentist checks your oral health with X-rays and a 3D scan before anything is made, and the package covers visits, attachment removal, eligible refinements and a retainer set, which often cost extra elsewhere.
Strengths
- An oral-health check with X-rays and a scan before treatment starts.
- Visits and eligible refinements are in the package price.
- One retainer set is included.
Limitations
- You need a partner clinic within reach for several visits, so check the journey before you book.
- The dentist confirms your package, which can cost more than the lowest price.
- The 30-day guarantee ends once you agree to go ahead after your check.
What to know
Smile White is a weaker fit if you want only your upper or lower teeth treated, or want a specialist orthodontist. Get your confirmed package, any treatment needed first and the total in writing before you agree to go ahead.
- Treatment model
- Dental exam · In-person check-ups
- How it starts
- A free online consultation, then an oral-health check with X-rays, a 3D scan and photos at a partner dental practice.
- Who plans and supervises
- Your partner dentist, who is GDC-registered. Smile White is owned by two dentists.
- Price
- £1,995 to £3,695The clinician decides which plan applies after an assessment. For both arches. Refresh, up to four aligners for minor relapse: £995, a limited course rather than full treatment.
Smileie
Provider with partner practices. Smileie sells the package, and a dentist at a partner practice examines you and takes clinical responsibility.
Consider it if you want a dentist to examine you in person, with two retainer sets included, and are prepared to confirm the price after the examination.
Why it is on the list
Smileie sits between mail-order brands and a full practice package. A dentist at a partner practice examines you in person, with X-rays where needed, and takes clinical responsibility before aligners are prescribed, which most online brands do not offer.
Strengths
- An in-person examination before aligners are prescribed.
- The examining dentist is responsible for your care.
- Two retainer sets are included.
Limitations
- Smileie's pages show different prices for the same package, so we cannot confirm what you would pay.
- Dearer packages apply to moderate and complex cases.
- Further aligners depend on the dentist and the package terms.
What to know
You reserve a package before the examination, and it is refunded in full if you are not suitable. Get your case category and the total in writing after the examination, before you commit.
- Treatment model
- Dental exam · In-person and remote check-ins
- How it starts
- Online screening, then an in-person examination at one of 23 partner locations listed on its website.
- Who plans and supervises
- The examining dentist at the partner practice is responsible for your clinical care.
- Price
- £1,599 to £2,899Both-arch packages run from £1,599 (homepage, mild) to £2,899 (complex). For a mild case Smileie's pages show £1,599, £1,799 or £1,899; confirm the total after the examination.
Straight Teeth Direct
Remote provider. Straight Teeth Direct plans and monitors treatment remotely.
Consider it if you want a fully remote service with one published price for both arches, and can have a check-up with your own dentist first.
Why it is on the list
Of the fully remote services we review for the UK, Straight Teeth Direct is the one our evidence supports most clearly. One published price covers both arches, monitoring, replacement aligners and a retainer set; you see a written plan and a 3D simulation before paying for aligners; and the company you contract with is named.
Strengths
- One published price for both arches, so the main costs are known in advance.
- You see the plan before paying for aligners.
- Monthly remote monitoring through the app.
Limitations
- Its pages do not say where an in-person examination takes place, and its clinicians are not named.
- Its pages disagree on how many refinements the price covers.
- Treatment is planned without attachments or IPR, so it suits milder cases.
What to know
Have a check-up with X-rays from your own dentist before you start, and get the refinement terms for your case in writing.
- Treatment model
- Home kit · Remote check-ins
- How it starts
- Free e-consultation, then a £69 SmileBox for home impressions, then the £1,790 StraightBox after you see the plan.
- Who plans and supervises
- Unnamed dentist for the first photos, then an assigned dentist or orthodontist who plans and monitors treatment. No GDC number is published.
- Price
- £1,859For both arches. Includes £69 for the SmileBox impression kit and plan.
Other clinician-provided aligner systems
Invisalign is not the only aligner system dentists and orthodontists use. These are separate products from different manufacturers, offered as alternatives to Invisalign: a practice may offer one, several or none of them. As with Invisalign, the practice examines you, plans your treatment and sets the fee, so choose the clinician and compare written quotes for the same case.
Invisalign has its own place on the shortlist because it is the most widely offered; that is not a finding that it works better than these systems.
Spark
Made by the orthodontic supplier Ormco. A dentist or orthodontist examines you, plans treatment and sees you in the practice, and in the UK it is mostly offered alongside Invisalign. Published fees vary by practice, and our sample does not show whether it is generally cheaper or dearer than Invisalign.
Price: £2,600 to £5,500. Read the Spark review
Angel Aligner
Made by Angelalign Technology. Your clinician examines you and approves the plan before aligners are made. Fewer UK practices offer it, and what you get depends on whether you are quoted its Pro or Select range.
Price: £1,500 to £4,995. Read the Angel Aligner review
Compare these providers side by side
Our comparison shows up to three providers at once, with the same facts in the same rows. Start with one of these pairings, or add any provider above with its Compare button.
- Treatment managed at a practice or clinicInvisalign, Impress, Smile WhiteImpress uses Invisalign aligners, so comparing it with Invisalign compares two ways of getting the same system: at a practice you choose or at Impress's own clinics. The differences are the clinic, the price and how you are seen.Compare these providers
- An in-person examination or fully remoteSmile White, Smileie, Straight Teeth DirectCompare these providers
Providers we reviewed but did not shortlist
Not being on this list is not a finding that a provider is unsafe or unsuitable for everyone. Each review sets out what we found.
- Oral Creation: Another aligner system prescribed by dentists, made by a small laboratory. It publishes no patient prices and we found no independent evidence about it. That is missing information rather than a problem we found, but it leaves us too little to describe it alongside the systems above.
- Six Month Smiles: A short-term treatment aimed at the front teeth rather than the bite. The British Orthodontic Society warns that this can leave the bite as it is or make it worse.
- Smile Perfect: Its refund pages contradict each other. It also names no dentist and does not give the supplier's company details, so it is unclear who you would hold to those terms.
- Diamond Whites: Not a separate service for new patients. When we checked on 26 October 2026, its website and pricing page redirected to Impress, and a new patient is examined and quoted at an Impress clinic, so the Impress entry covers it. Former customers should read the review for what to ask Impress.
- NewSmile: Its aligners could not be ordered when we checked on 27 October 2026: the order button led to a missing page and its shop listed no aligners. Its refund documents also contradict each other. NewSmile has not announced a closure.
How we chose these providers
- Current availability
We started from every clear aligner provider and system we review for the UK. We left out one whose aligners could not be ordered when we checked, and one that now sends new patients to Impress, which is already on the list.
- Assessment and supervision
We gave most weight to an examination by a dentist or orthodontist before aligners are made, because only an examination can show whether aligners suit your teeth. For a fully remote service, we looked for a named company you contract with and published terms we could check.
- What the price covers
We preferred a published price or a clear quote process, and checked what the price includes: retainers, refinements and replacement aligners. Where a provider's published figures disagree, we say so rather than choosing one.
- Problems found, and information missing
We left out providers whose reviews found a specific problem we would want resolved first, such as refund terms that contradict each other or treatment aimed at the front teeth rather than the bite. Missing information, such as an unnamed dentist or no published price, is not a problem in itself. Our reviews say where it applies, and we left a provider out for it only where it left us too little to judge by.
- A real choice
We chose providers that work differently from one another, so the list covers practice treatment, a fixed-price clinic chain, packages and remote treatment, rather than five versions of the same thing. Other dentist-provided systems are listed separately as alternatives to Invisalign.
Every fact on this page comes from our provider reviews, which list their sources and the date each was checked.
We did not test any treatment, examine anyone or speak to patients, and no clinician has reviewed this guide. Offers and promotions played no part in choosing the shortlist. How we compare explains how our comparison and finder work.
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Sources
- Aligners.co. Invisalign reviewUpdated 26 October 2026. Lists the provider sources it relies on.
- Aligners.co. Impress reviewUpdated 26 October 2026. Lists the provider sources it relies on.
- Aligners.co. Smile White reviewUpdated 26 October 2026. Lists the provider sources it relies on.
- Aligners.co. Smileie reviewUpdated 26 October 2026. Lists the provider sources it relies on.
- Aligners.co. Straight Teeth Direct reviewUpdated 26 October 2026. Lists the provider sources it relies on.