http://fineract.incubator.apache.org/

    Apache Fineract (\’fīn-,ә-,rakt\) is an open source
    system for core banking as a platform. Fineract 
    provides a reliable, robust, and affordable solution 
    for entrepreneurs, financial institutions, and service 
    providers to offer financial services to the world’s 
    2 billion underbanked and unbanked.

Mint now uses an internal service (called FICDS, IIRC, but I'm no longer at Intuit) that still scrapes. That service also handles bank interactions for Quickbooks, TurboTax and Quicken, though the latter was sold off, so may be moving to something else. Additionally, that service allows the use of tokenization, which greatly reduces the chances that account credentials would leak based on a vulnerability in Mint or a rogue employee, since that team is pretty locked down and Mint, TurboTax and Quickbooks never store banking credentials.

As an aside, I wonder why Wells picked Xero to trial their API. It could have been a lot more impactful by doing a trial with Intuit, especially if they could have had it ready by tax season.

Also, here's a fun fact: For a number of years, Mint employees at Intuit could not see their own employee stock plans in Mint. Morgan Stanley's site was a Flash monstrosity that couldn't be scraped correctly. Asking them about it earned you a well-practiced eye roll.

Having your customer's data is a competitive advantage when it comes to cross-selling other services.