I resisted using Robinhood for a very long time over the same concerns. They are however a completely legitimate broker with the same types of protection. I actually ended up liking their app better than TD. It's more responsive, has a better layout and is generally very user friendly. Don't get me wrong, I still use the more advanced tools TD offers before trading. Aside from free trades, I liked the big graph at the top with both absolute and percentile info on my entire account. Something that I couldn't seem to find anywhere else.