Straight Teeth Direct clear aligners

Price

Treatment is in two stages. The SmileBox costs £69 and covers the impression kit, a dentist's check of your impressions, a 3D simulation and a written plan with the diagnosis, expected result and limitations. You can stop there if you do not like the plan. The StraightBox, at £1,790 if you pay in one go, covers the aligners for both arches, monthly monitoring, replacement of lost or broken aligners, a starter kit and one set of removable retainers.

You can spread the cost without a credit check, either in three payments of £629 (now, and two and four months later) or £499 up front and then £179 a month for eight months. Three payments of £629 come to £1,887, and £499 plus eight of £179 comes to £1,931: £97 and £141 more than paying £1,790 at once. With the £69 SmileBox, the totals are £1,956 and £2,000, against £1,859 paid in full. Credit through Humm is also offered, with a credit check; Straight Teeth Direct does not show the interest rate, so ask Humm for the total you would repay.

Extras sit outside the £1,790. Whitening is £199. The annual retainer plan, which sends fresh retainers each year, is £239 in the first year and £179 a year after that (or £179 from the start if your current retainers are under 18 months old).

Offers and discount codes

We have no verified current offer from Straight Teeth Direct. That does not mean there is no promotion: we list one only after checking it. The prices in this review are Straight Teeth Direct's prices without any promotion.

If Straight Teeth Direct shows a discount or a code when you visit, check its end date and terms on Straight Teeth Direct's own site before you rely on it, and compare the total you would pay. We list an offer only after checking it on the provider's site and recording its terms, including any end date the provider gives.

All current deals

How treatment works

You start by uploading five photos and answering questions about your teeth. A dentist tells you, usually within a day or two, whether at-home treatment is likely to work. If it is, you order the SmileBox and take impressions at home, sending a photo of your first attempt so a dentist can check your technique before you finish. Straight Teeth Direct says most impressions are good enough for planning, but about one in five people need to take new ones before the aligners are made. Repeat impressions are covered if you followed the instructions.

Your assigned dentist or orthodontist then prepares the plan. If you go ahead, the aligners are made and sent in stages rather than all at once, so the plan can be adjusted as your teeth move. You wear them about 22 hours a day and usually change set every two weeks. The company quotes five to nine months for most people.

Cases are planned without attachments (small tooth-coloured bumps that help aligners grip) and without IPR (removing a small amount of enamel between teeth to make space). Instead, teeth are moved mainly by widening the arch.

That keeps treatment simple and fully remote, but it also limits which movements are possible, which is why only mild to moderate cases are accepted.

What we like

• You see the plan before paying for aligners

  The £69 SmileBox includes a written plan and a 3D simulation, so you can decide with the full picture before committing £1,790.

• One price for both arches

  The £1,790 package includes monitoring, replacement of lost or broken aligners and a set of retainers, so the main costs are known in advance.

• Payment plans without a credit check

  Two in-house plans spread the cost without a credit search, although both cost more in total than paying at once.

What to be aware of

• Its pages disagree on refinements

  The pricing page says one round if prescribed; its FAQ says all extra aligners are covered. Get the answer for your case in writing.

• No in-person examination

  Treatment is fully remote. A recent check-up and X-rays from your own dentist are recommended but not required.

• Limited range of movements

  Treatment is planned without attachments or IPR, so it suits mild to moderate cases and may leave small gaps that need further work.

What customers say

Straight Teeth Direct has a large number of reviews. Among those we read in October 2026, most were positive about responsive support, the monthly check-ins and the result for minor crowding or gaps, and the negative ones mostly described gaps left at the end, treatment taking much longer than planned, teeth moving back after a year or two, and disagreement over whether more refinements are covered. Several reviewers who were unhappy with the result say they later paid a local dentist for bonding or a fixed retainer. These are individual experiences and do not show why a particular treatment fell short. Separately, treatment is planned without attachments, which many aligner systems use to help trays grip teeth for some movements, so ask the assigned clinician what can realistically be achieved for your teeth.

Clinical oversight

A dentist screens your photos, and an assigned dentist or orthodontist prepares and monitors your plan through the app. None of them is named on the site. Straight Teeth Direct recommends that you have had a check-up with your own dentist in the last 6 to 12 months, and asks for recent X-rays and gum scores so they can be taken into account. Sharing them is optional, and the treatment itself involves no in-person visit.

The General Dental Council says the decision that orthodontic treatment is suitable should rest on a full assessment of your oral health, and that there is currently no effective substitute for a physical examination as its foundation. If you choose Straight Teeth Direct, a recent check-up and X-rays from your own dentist give the assigned clinician that information. Ask who will prescribe your aligners and where they are registered.

Retainers, refinements and refunds

One set of removable retainers is included at the end of treatment. A fixed retainer is not, so you would arrange that with your own dentist if you want one. Retainers wear out, and the annual plan is how Straight Teeth Direct supplies replacements.

Refinements are extra aligners if your teeth do not follow the plan. The pricing page includes "one round of refinements if your dentist prescribes them", while its FAQ says any extra aligners needed are covered by the fixed price.

Customer complaints about refinements being refused suggest the difference matters, so ask how many rounds you would get, in writing, before you pay.

An unopened SmileBox can be returned within 30 days for a refund, at your own postage cost. If you buy the aligners and decide to stop within 30 days of receiving the first five, Straight Teeth Direct keeps £499 and refunds the rest (£1,291 if you paid in full), and you keep those aligners. On a payment plan, £499 is the minimum you pay. After the rest of your aligners have been sent, there is no refund.

The company you pay is Straight Teeth Direct Europe Ltd, registered in Ireland, and its terms are governed by Irish law. A former UK company that used the Straight Teeth Direct name is in liquidation and is not the current seller.

Alternatives worth comparing

Straight Teeth Direct sits in the middle on price, but price does not track the level of care: Smileie includes an in-person examination for about the same price, while Smile White adds an examination and aligners that can use attachments for a little more. Compare what the examination, monitoring and package include rather than the price alone.

Who this may suit

Straight Teeth Direct may suit an adult with mild crowding or gaps who wants a fixed price, is comfortable taking impressions at home and is happy to be monitored by photos. If a dentist has told you that you need more complex movement, such as larger rotations, or you want a named clinician who examines you in person, a dentist-provided aligner system is likely to be a better fit.

Questions worth asking before paying

• Who is the dentist or orthodontist responsible for my plan, and where are they registered?
• How many rounds of refinements are included in my £1,790?
• Will you use my own dentist's X-rays and gum scores when planning?
• If I stop after the first aligners, how much would I get back on my payment plan?
• What would a replacement retainer cost if I do not join the annual plan?

Bottom line

Straight Teeth Direct offers a clear fixed price, a plan you can see before committing, and monthly remote monitoring. It plans treatment without attachments and mainly by widening the arch (the curved row of teeth), and it is aimed at milder cases. Confirm how many refinements you would get, and have a check-up with X-rays from your own dentist before you start.