Disclosed herein are package substrates with integrated components, as well as related apparatuses and methods. For example, in some embodiments, an integrated circuit (IC) package, may include: a substrate having opposing first and second faces, an insulating material disposed between the first and second faces, and a thin film transistor (TFT) disposed between the first and second faces, wherein a conductive portion of the TFT is disposed on a layer of the insulating material, and the conductive portion of the TFT is a gate, source, or drain of the TFT; and a die coupled to the first face of the substrate.