Both Invisalign and Spark are effective clear aligner systems priced from around £2,500 in the UK. Here's how they compare on cost, material, attachments, and results — so you can make an informed choice.
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| Invisalign | Spark | |
|---|---|---|
| Price range (UK) | £2,500 – £5,500 | £2,500 – £5,000 |
| Treatment time | 6–18 months | 6–18 months |
| Material | SmartTrack (polyurethane) | TruGEN (polycarbonate) |
| Attachments | Frequently required | Fewer required (claims) |
| Refinements | Included in Comprehensive | Varies by provider |
| Stain resistance | Good | Higher (TruGEN material) |
| Provider network | Very large (est. 14M+ patients) | Growing (newer system) |
| Digital planning | iTero / ClinCheck | Approver software |
| FDA/CE approved | Yes | Yes |
Both systems are priced similarly in the UK, typically ranging from £2,500 to £5,500 depending on case complexity. Spark may be marginally cheaper at some clinics as providers compete for market share, but the difference is usually small.
The final cost depends more on your case complexity and the clinic you choose than on the brand. A mild case requiring 7–14 aligners will cost significantly less than a complex case needing unlimited aligners.
Both systems offer finance options at most clinics, with 0% interest plans over 12–24 months commonly available. Monthly payments typically start from £100–£250.
Both systems perform equally well. Choose based on your provider's recommendation and pricing. Spark may offer slightly fewer attachments for simple movements. For very minor gaps, composite bonding → can sometimes close small spaces without aligners.
Both systems can handle moderate cases. Invisalign has a larger evidence base and more predictable refinement processes. Your provider's experience matters more than the brand. Read our complete guide to clear aligners → to understand how treatment planning works.
Invisalign generally has the edge for complex cases due to its longer track record, SmartForce features, and Comprehensive plan with unlimited aligners and refinements. However, an experienced Spark provider can also achieve excellent results. If you're weighing aligners against traditional orthodontics, see our Invisalign vs braces comparison →
Spark's TruGEN material is designed to be more stain-resistant and may require fewer attachments. If discreetness is your top priority, Spark could have a slight advantage. Many patients follow aligners with teeth whitening → for a complete smile refresh.
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Spark and Invisalign are typically priced similarly, ranging from £2,500 to £5,500. Some clinics may offer Spark at a slightly lower price since it's a newer system competing for market share. The best approach is to get quotes from clinics offering both systems.
Invisalign has a longer track record and larger evidence base for complex cases. Invisalign Comprehensive offers unlimited aligners and refinements. Spark is effective for mild to moderate cases but has less published data on complex treatments.
Spark's TruGEN material is designed to be more stain-resistant than Invisalign's SmartTrack material. In practice, both systems perform well if you follow care instructions — remove aligners before eating/drinking anything other than water.
Spark claims their system requires fewer attachments (the small tooth-coloured bumps bonded to teeth). Fewer attachments can mean a more discreet look, but the number needed depends on your specific case, not just the brand.
Some clinics offer both systems and can recommend the best fit for your case. However, many dentists are certified for one system only. Pearlie helps you find clinics offering clear aligners so you can discuss your options.
Both are effective clear aligner systems. Consider: your case complexity (Invisalign has more data on complex cases), your provider's experience with each system, and the quoted price. A good provider will recommend the system best suited to your teeth.
Yes. Spark aligners are available in the UK through certified dental providers. The network is smaller than Invisalign's but growing. Use Pearlie to find clinics offering clear aligner treatment near you.
Retainer inclusion varies by clinic, not by brand. Some clinics include retainers in the treatment price; others charge £100–£400 separately. Always confirm what's included in your quote.
Invisalign cost & treatment guide
Full pricing breakdown, treatment tiers, and what affects cost.
Complete guide to clear aligners
How aligners work, what to expect, and choosing a provider.
Invisalign vs braces
Comparing clear aligners with traditional fixed braces.
UK dental costs explained
Private vs NHS pricing and what drives treatment costs.
Teeth whitening
Whiten after aligners for maximum impact. From £250.
Composite bonding
Finishing touches after alignment. From £250 per tooth.
Porcelain veneers
Full smile transformation after straightening. From £700.
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Medical disclaimer: This content is for informational purposes only and does not constitute medical or dental advice. Always consult a GDC-registered dental professional for diagnosis and treatment recommendations. Prices shown are estimates and may vary by clinic and individual case.
