Research on Fintech Companies & Expense management companies

I am looking to research on expense management companies who provide/offer a service to business in the UK, this research will compare what features each expense management companies offer for example - VAT reports, Multi Team access ect, categorisation of tax transactions.

In addition to this i would also like to compare UX designs of each expense management company on each feature - comparing like for like features. This will also include Role analysis whereby depending on the Role level, each role may be given different levels of access, user onboarding comparison etc