I don't know, Vanguard is pretty good for what its supposed to be used for. You can get money in and out real fast. Even very large sums of money. You can trade

I don't know, Vanguard is pretty good for what its supposed to be used for. You can get money in and out real fast. Even very large sums of money. You can trade without waiting for full settlement and all that, to make all the proper large rebalancing trades quickly without losses. You can have all your retirement accounts in it and tax management and integration works well. Their flows are all pretty smooth, you really don't need slick UI to make 3-4 trades a month at most. Of course you do need slicker UI when you are essentially offering an online casino to your users. Nice colors, engaging UI, etc is important to keep your audience entertained and to have them roll the dice more often.