Almost every online car purchasing service at major brands is a white labeled truecar. Don't assume that, say, the "AAA" or "Costco" brand is giving you any special treatment. Your lead goes into a lead queue, a price that is better than floor/sticker but not as good as you may have gotten from negotiation is given, and you, saving time and stress instead of money, buy the car.
I was a huge fan of truecar until I did the experience, and now I'm hugely disappointed. I felt like the experience hid information and shepherded me to a dealer to let it take advantage of me; I saved some time and hassle, but I spent more money in the process and at the end, wasn't all that happy. YMMV, so check out the tool (directly or via AAA or Costco etc.), but be realistic over what it can do: it makes money from the dealers, not you, so be aware of biases.
I haven't tried non-online services (personal negotiators, etc.) so can't speak to those.
I was a huge fan of truecar until I did the experience, and now I'm hugely disappointed. I felt like the experience hid information and shepherded me to a dealer to let it take advantage of me; I saved some time and hassle, but I spent more money in the process and at the end, wasn't all that happy. YMMV, so check out the tool (directly or via AAA or Costco etc.), but be realistic over what it can do: it makes money from the dealers, not you, so be aware of biases.
I haven't tried non-online services (personal negotiators, etc.) so can't speak to those.