I've always been intrigued by Personal Capital, but I don't like the idea of having a single point of failure with login information to all of my accounts. Maybe I'm paranoid, but if you're paranoid like me then you might be interested to know that you can manually add accounts in in Personal capital. For investment accounts you can add a ticker symbol and number of shares and it will keep track of the current value for you, which is the part I've always wanted.
They make it a lot more obvious how to link accounts, but to add one manually (without giving account numbers, login credentials, or even institution names if you don't want), click the little add account + sign in the upper left, then in the dialog box that pops up click the "More" button in the lower right and a number of manual account types will show up.