Monzo is on the forefront of transparency amongst private companies, providing a full annual report. Among the highlights are 750k current accounts but 33.1m GBP in losses. Not very sustainable not impressive. Clients yes, but seems a lack of economic model.
Publishing our 2018 Annual Report! An annual report gives a detailed look at a company’s activities in the last financial year. It covers what the company’s been doing, and how that’s affected its finances. They’re written for the company’s shareholders and investors, reviewed by auditors and the board, and submitted to Companies House. But, that usually means a company’s customers never actually see what’s in it.
https://monzo.com/blog/2018/07/02/publishing-our-2018-annual-report/