What is the difference between a signature stamp and an electronic signature?

The ESIGN Act doesn't give a clear answer to what the difference between an e-stamp and an eSignature is, however, the most notable feature is that e-stamps are more popular among legal entities and corporations. There’s a circulating opinion that stamps are more reliable. Though, according to the ESIGN Act, the requirements for an electronic signature and an e-stamp are almost the same. In contrast to digital signatures, which are based on private and validated keys. The main issues with digital signatures is that they take more energy to create and can be considered more complicated to use.