Energy harvesting (EH) is a process in which ambient energies are utilized to form effective energies using various advanced techniques. Growing demand for energy in major end-use industries and green powered technologies are expected to drive the overall EH market. Indeed, the significant growth of the market can be attributed to the increasing installation of wireless sensor networks (WSNs) and internet of things (IoT) which are expected to boost the EH market through increasing self-powered sensors. In general, this chapter investigates the EH framework based on energy sources and technologies, intelligent solutions, and market opportunities.