I have tried out Plaid Connect and it worked really well for me. This was in beta when only a very limited selection of banks were supported, so I had to go get

I have tried out Plaid Connect and it worked really well for me. This was in beta when only a very limited selection of banks were supported, so I had to go get a Bank of America account just to use it. Authentication was incredibly easy and they handled security questions very gracefully in my opinion. I was able to build a pretty good Simple Goals clone with a weekend's worth of work. I haven't used their Plaid Auth product yet.