I use nutmeg and really like it - I actually really like that its a managed investment as their performance has been much better than my own attempts at investing (hopefully other than my monzo investment which I have high hopes for)
Their interface is really nice and their monthly communications are very helpful (including video reviews explaining their investment choices). Their comms have actually nudged me towards investing more earlier in the year as opposed to splitting it over months.
Perhaps controversially what I would really like in the investment space is maybe the ‘opposite’ of partnerships with investment groups - it can be confusing which services are better than others given their fee structures / minimum investment amounts etc. If monzo could offer a range and help explain the differences that might be of use (though I guess this is actually a better fit for a price comparison site or money advisor - not sure whether monzo sees itself long term being money advice).
Given I’m a nutmeg user, here is my actual thought on benefits of integration:
It ultimately would be nice to see my balance (and have monzo extend to understand my financial positon overall) however my impression is that Monzo are very far away from this - e.g. what about my mortgages? joint savings account with my wife (which has subdivided pots within it? etc. Just adding nutmeg account on top of the monzo account (which I intend to use for discretionary spend) is not going to add much more to understanding my financial position (the nutmeg site itself is actually really simple/good for showing my balance and portfolio movement there so I can’t see myself moving to wanting to view my performance in Monzo)
tldr; might be nice to see balance, doubt i would actually find it useful though, would just look on nutmeg itself
What I would actually find useful is some analysis on how much spare cash I have for investing / savings and what the trend is over several months (given committed spend). This doesnt require nutmeg integration but is ultimately the data that would drive me to invest more/less in nutmeg (or make a 1 off contribution)
edit - this is what cleo / chip / pariti already do (and infact it was pariti that calculated what I currently use to work it out) but I assume this is monzo’s ambition to have such functionality (as I would see it being a ‘base minimum’ functionality of a smart current account in the future)