Is Seed similar to Plaid (http://www.plaid.com)?
Zach can speak for Plaid, but to my understanding they're focused on providing API's that improve banking experiences for existing banks and bank customers.
[1] The world's first business banking API
[2] The API for banking data
[1] https://seed.co/images/graphics/seed_logo_blue.png
[2] http://farm6.static.flickr.com/5572/15111751177_d74935b2b4.j...
Our stuff is designed to be portable between banks where possible. There are only about half a dozen bank core systems in wide use in the US today, so in theory if we integrated with all of them we'd be able to partner with most any bank. To date we have integrated with two different cores.