Off the top of my head, here’s a few features which Monzo has that are still unique (compared to Starling & Revolut, who are the main competiton right now):
- Payment requests with bill splitting & instant payments aka Monzo.me, without the user needing to set up an account
- Targets & forecasting (including the Pulse Graph)
- A much more complete merchant database
- Crowdsourced travel tips
- Greater transparency & sharing of knowledge with users
- Community events
So if you really need a service that provides the standard banking features (faster payments, direct debits etc.) &/or overdrafts right now (and you’re not relying on Targets), go with Starling. But if you’re happy to let your legacy bank account continue to handle those things, go with Monzo…