Nobody in Phoenix needs a twentieth exchange review
What people need is help with one specific decision: which account to open, given that they live in Arizona, bank in dollars, and would rather not discover a platform's weak point with money on it. So this list is short, the criticism is explicit, and every ranking is justified in terms of the job it is for.
One thing worth saying up front, because it reframes the whole comparison. The difference between the cheapest and most expensive platform on this list is a few tenths of a percent. The difference between buying through a platform's simple interface and its advanced interface — on the same platform, same asset, same custody — is frequently several times larger than that. Which venue you choose matters far less than how you buy once you are inside it. If you take one thing from this page, take that.
