AI Picks / United Kingdom / Money
Best cash isa in the UK, according to AI
Shawbrook Bank was named most often, appearing in 36 of 60 answers (60.0%). This page reports what the assistants said across 60 answers, with 15 each from ChatGPT, Gemini, Perplexity and Google AI Overviews.
- 15 real searches
- 4 AI assistants
- 60 answers read
- No affiliate links
- Best for 1-year fixedShawbrook BankNamed in 60% of answers
- Best for easy accessTrading 212Named in 48.3% of answers
- Best for 2-year fixedTandem BankNamed in 46.7% of answers
- Best for transferring existing isa savingsChipNamed in 43.3% of answers
- Best for 3 to 5 year fixedCastle Trust BankNamed in 28.3% of answers
- Best for 3-year fixedClose BrothersNamed in 26.7% of answers
The cash isas brands AI recommends most
Share of the 60 answers that named each brand. The squares show which assistants named it.
- 1Shawbrook BankModels named: 5-Year Fixed, 1-Year Fixed, 1 Year Fixed Rate Cash ISACGPAYour brand? Add your link
- 2Trading 212Models named: Cash ISA Promo Rate, Cash ISA, Easy-access Cash ISACGPAYour brand? Add your link
- 3Tandem BankModels named: 2-Year Fixed, 5-Year Fixed, Tandem Fixed Rate Cash ISACGPAYour brand? Add your link
- 4ChipModels named: Smart Cash ISA, Cash ISA, Easy-access Cash ISACGPAYour brand? Add your link
- 5Castle Trust BankModels named: Fixed Rate e-Cash ISA, 1-Year Fixed, One-year fixed Cash ISACGPAYour brand? Add your link
- 6Close BrothersModels named: 2-Year Fixed, 2-Year Fixed Rate Cash ISA, 3-Year FixedCGPAYour brand? Add your link
- 7MoneyboxModels named: Cash ISA, Open Access Cash ISACGPAYour brand? Add your link
- 8Charter Savings BankModels named: Easy Access Cash ISA Issue 82, Easy Access Cash ISA, Easy AccessCGPAYour brand? Add your link
- 9InvestecModels named: 1-Year FixedCGPAYour brand? Add your link
- 10Leek Building SocietyModels named: 5-Year FixedCGPAYour brand? Add your link
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What the answers said about each provider. Rates and prices change, so we do not show them: check the provider's own site.
| Brand | Share of answers | Named by | Named best for | Products named |
|---|---|---|---|---|
| Shawbrook Bank | 60% | 4 of 4 | 1-year fixed, one-year fix; two-year fix; five-year fix, highest rate | 5-Year Fixed, 1-Year Fixed, 1 Year Fixed Rate Cash ISA |
| Trading 212 | 48.3% | 4 of 4 | easy access, new money, access | Cash ISA Promo Rate, Cash ISA, Easy-access Cash ISA |
| Tandem Bank | 46.7% | 4 of 4 | 2-year fixed, 3-year fixed, 2-year fix | 2-Year Fixed, 5-Year Fixed, Tandem Fixed Rate Cash ISA |
| Chip | 43.3% | 4 of 4 | easy access, transferring existing isa savings, transfers | Smart Cash ISA, Cash ISA, Easy-access Cash ISA |
| Castle Trust Bank | 28.3% | 4 of 4 | 1-year fixed, 3 to 5 year fixed, one-year fix; five-year fix | Fixed Rate e-Cash ISA, 1-Year Fixed, One-year fixed Cash ISA |
| Close Brothers | 26.7% | 4 of 4 | 2-year fixed, 3-year fixed, two- to three-year fix | 2-Year Fixed, 2-Year Fixed Rate Cash ISA, 3-Year Fixed |
| Moneybox | 21.7% | 3 of 4 | easy access, easy access, flexibility, flexible easy-access | Cash ISA, Open Access Cash ISA |
| Charter Savings Bank | 16.7% | 4 of 4 | instant access without relying on a temporary bonus, easy access, established alternative with transfers | Easy Access Cash ISA Issue 82, Easy Access Cash ISA, Easy Access |
| Investec | 15% | 2 of 4 | 1-year fixed, one-year fix, fixed-rate returns | 1-Year Fixed |
| Leek Building Society | 15% | 2 of 4 | 5-year fixed, 5-year fix, five-year fix | 5-Year Fixed |
What people in the UK ask, answered
Each answer is our summary of what the four assistants said.
Which cash ISA providers do AI assistants name for the best rates?
Shawbrook Bank was named in 36 of 60 answers, the most of any brand. Trading 212 followed in 29 answers and Tandem Bank in 28. The assistants did not single out one brand as best for rates overall.
Which cash ISA providers do AI assistants name as the best in the UK?
Shawbrook Bank was named most often overall, in 36 of 60 answers. Trading 212 appeared in 29 and Tandem Bank in 28. The assistants did not single out one brand as best for this question.
Which providers do AI assistants name for fixed rate cash ISAs?
Shawbrook Bank was named in 36 answers and Tandem Bank in 28 for fixed rate cash ISAs. Castle Trust Bank appeared in 17 and Close Brothers in 16. Shawbrook was named as best for one-year, two-year and five-year fixes.
Which providers do AI assistants name for one-year fixed rate cash ISAs?
Shawbrook Bank was named as best for one-year fixed in 36 answers, with Castle Trust Bank in 17 and Investec in 9. Shawbrook's 1-Year Fixed and Castle Trust's One-year Fixed Cash ISA were among the models named.
Which providers do AI assistants name for two-year fixed rate cash ISAs?
Tandem Bank was named as best for two-year fixed in 28 answers, with Close Brothers in 16. Shawbrook Bank was also named for two-year fixes in 36 answers. Tandem's 2-Year Fixed and Close Brothers' 2-Year Fixed Rate Cash ISA were among the models named.
Which providers do AI assistants name for easy access cash ISAs?
Trading 212 was named as best for easy access in 29 answers, with Chip in 26 and Moneybox in 13. Charter Savings Bank appeared in 10 answers for easy access. Trading 212's Easy-access Cash ISA and Chip's Easy-access Cash ISA were among the models named.
Which cash ISA providers do AI assistants name for over 60s?
The assistants did not single out a brand for over 60s. Shawbrook Bank was named most often overall, in 36 of 60 answers, followed by Trading 212 in 29 and Tandem Bank in 28.
Which cash ISA providers do AI assistants name for the best interest rates?
Shawbrook Bank was named in 36 answers and Trading 212 in 29 for the best interest rates. Tandem Bank appeared in 28 and Chip in 26. Shawbrook was named as best for the highest rate.
Which providers do AI assistants name for flexible cash ISAs?
Chip was named as best for transfers in 26 answers, and Moneybox for flexible easy-access in 13. Trading 212 was named for access in 29 answers. The assistants did not single out one brand as best for flexibility overall.
Which providers do AI assistants name for one-year cash ISAs?
Shawbrook Bank was named as best for one-year fixed in 36 answers, with Castle Trust Bank in 17 and Investec in 9. Shawbrook's 1-Year Fixed and Castle Trust's 1-Year Fixed were among the models named.
Which cash ISA providers do AI assistants name in response to Martin Lewis searches?
The assistants did not single out a brand for Martin Lewis searches. Shawbrook Bank was named most often overall, in 36 of 60 answers, followed by Trading 212 in 29 and Tandem Bank in 28.
Which providers do AI assistants name for instant access cash ISAs?
Trading 212 was named as best for easy access in 29 answers, with Chip in 26 and Moneybox in 13. Charter Savings Bank appeared in 10 answers for instant access without relying on a temporary bonus. Trading 212's Easy-access Cash ISA was among the models named.
Which cash ISA providers do AI assistants name in response to Money Saving Expert searches?
The assistants did not single out a brand for Money Saving Expert searches. Shawbrook Bank was named most often overall, in 36 of 60 answers, followed by Trading 212 in 29 and Tandem Bank in 28.
Which providers do AI assistants name for cash ISAs with transfers in?
Chip was named as best for transferring existing ISA savings in 26 answers. Charter Savings Bank appeared in 10 answers as an established alternative with transfers. The assistants did not single out one brand as best for transfers overall.
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Not financial advice. This page reports which providers AI assistants named; it is not a recommendation by us. Rates, fees and terms change, and products may not suit you: check the provider’s own information, and that it is authorised by the FCA before you apply.
How we count
We ask ChatGPT, Gemini, Perplexity and Google AI Overviews the questions people in the UK actually search for (15 for this category), asked from the UK, and read every answer: 60 answers here.
A brand scores when an answer recommends it. Its rank is the share of answers that named it. Shops, review sites and brands an answer warns against are not counted. Different spellings of the same brand are merged.
This is what the assistants said on 17 October 2026, not our own opinion: we do not test products. We ask again every month. Paid listings are labelled and never change the ranking. There are no affiliate links on this page.
Vasukai and Kael Tripton are both run by Kael Tripton Ltd. The Kael Tripton box on this page is ours; it is not part of the AI ranking and does not change it.
The rankings and data are ours (© Vasukai). You are welcome to quote a ranking with a link to this page; copying the data in bulk or by automated means is not permitted.