Ask HN: What high yield savings account do you use for your emergency fund?

I have some money in an Ally HYSA but wondering if it's worth switching to Wealthfront, SoFi, Betterment, or some other online savings account with a higher interest rate. At the time of writing, Ally's saving rate is 2.5% while the others are:

Wealthfront: 3.3%

Betterment: 3.2%

SoFi: 3%

These are all FDIC insured, so it seems like it comes down to the quality of the company's apps and customer service when the APY are comparable. I've also seen that some people are using money market accounts instead of savings accounts. Is anyone going that route and have insights about it?