This is semi-complicated to answer, you can read the back story here https://www.offerzen.com/blog/building-a-programmable-bank-account-for-developers-part-2
tl;dr Root pivoted to insurance, Investec was inspired by their programmable bank offering and decided to roll their own. Root is not involved anymore on the product, but are excited to see Investec join the pursuit of opening fintech infrastructure to devs.