What risks should I be considering before connecting my brokerage to Monarch?

Monarch uses third party companies to get your brokerage account information, just like other budgeting apps do (such as Mint, YNAB, Personal Capital). Check out this link for their statement. If you’re interested in the privacy policies of the companies that handle the sensitive financial information here they are: Plaid, Finicity

I can’t speak for Monarch Money, but I understand that many companies use services like Plaid and Finicity to display financial information without housing our sensitive data for liability reasons. In other words, if Monarch got hacked (however unlikely that is) and our information is exposed, our login info and whatever else wouldn’t be part of that information.

I use Betterment for my brokerage and they allow (require?) 3rd party connections like Monarch and Mint to use a different login/pwd that is specific to that application. I set it up in Betterment and then use that read-only login for Monarch.