Technically, no loans are instant. No matter what, you have to fill out an application. And even if you go with a no-credit-check lender, it will still need to review your basic financial information.
That said, many lenders can provide loans the same day you apply. These include Alliant, LightStream, Rocket Loans and SoFi. You could also opt for a paycheck advance app — these generally have a fast funding timeline.