Tail uses open banking data to improve and inform consumer choices. As soon as a customer uses the Tail app to claim a discount, their bank informs Tail of the transaction in order to provide instant cashback.On August 7th, 2020, Tail was acquired by Quantum Group. The terms of the transaction were not disclosed. Cashback directly to your Starling or Monzo account. Simply pay with your linked card and enjoy up to 50% cashback at our retail partners – all paid back directly into your account at the end of each week.