I evidently have too much time on my hands, so cross-posting (I hope that’s okay) something I was posted on the Monzo forum about integrating the apps:
There’s been talk over on the Stocks & Shares Pot thread about seeing this type of information in Monzo. Freetrade was mentioned, and I’ve been thinking about how an integration with Freetrade might work.
Here’s the pitch: 
- Monzo + Freetrade = highly complementary
- Monzo can unlock 1m+ additional users for Freetrade - when Freetrade is ready for them. FT can then monetise a large part of this market when they launch chargeable ISAs and Alpha (their monthly subscription product).
- Freetrade can help Monzo in demonstrating a tight integration between the apps, and make the financial hub concept come to life. This data and demonstration will be valuable in attracting additional partners.
- But Freetrade + Monzo can be more than the sum of their parts. What if they offered a set of pre-selected investment products that they user didn’t have to actively manage - a bit like Nutmeg - bought in a couple of taps from within Monzo? This doesn’t dilute the Freetrade proposition and a small mark-up and revenue share means that this might be a lucrative revenue stream for both companies.
- Freetrade could do with better banking services - and live cash transfer from external bank accounts. Monzo could provide back-end banking services to Freetrade - for example by giving each Alpha customer a sort code and account number - making the lag of sending money to Freetrade a thing of the past, generating revenue for Monzo and making Freetrade slicker.
What would it look like in the Monzo app? :monzo:
- New ‘investment’ section in the new Account tab
- From there, existing Freetrade customers see their Portfolio as an aggregated view. Tap to breakdown - still within Monzo - then when selecting individual stocks it takes you seamlessly to the right screen in Freetrade.
- New customers get the ability to open a Freetrade account. Immediately with no hassle. App downloads in the background - Monzo shares KYC with Freetrade (with the user’s consent, of course) and you’re already logged in and good to go.
- As a separate proposition within the Monzo app, users can tap to open a set of pre-prepared funds. Available exclusively within Monzo so not to dilute the Freetrade share-dealing proposition, charging a small commission would generate revenue for both companies.
How would they make money? 
- No cost to either party of showing existing Freetrade customer data within Monzo - this part of the integration just helps both companies grow
- Assuming Freetrade sees value in growing its freemium customer base, Freetrade pays Monzo a referral fee for each account opened from within Monzo (£5, say).
- Similarly Freetrade customers opening a Monzo account would net Freetrade £5 (same incentive as for the other Monzo account opening trials).
- For the pre-selected investment products, Monzo and Freetrade each take a mark-up of 0.25 - 1%
- Monzo charges a monthly fee to provision bank account services to Freetrade alpha customers (call it £1/month)
(Note: all these figures are guesses and based on no real research)
This would lead to an ongoing, mutually beneficial commercial relationship, I think / hope.
What does everyone think? Is this an interesting model for folks like Monzo and Freetrade to look at?