I have created a personal finance tool that Works-For-Me and requires no sharing of login credentials with third parties.

Something that scrapes financial transactions from bank and credit-card accounts in a fully automated way where possible, and semi-automated way where necessary, dumps those transactions into a database, automatically categorizes them, and creates dashboards for commonly used views and analyses.

I've blogged a bit about it here: https://sagar.se/blog/where-is-the-money/