Which of the two kingdoms of bacteria are more similar to humans?

The kingdom of bacteria that is more similar to humans is the Archaea. Although both Archaea and Bacteria are prokaryotic, Archaea share more genetic and biochemical similarities with eukaryotes, including humans. For example, the machinery involved in DNA replication, transcription, and translation in Archaea is more akin to that of eukaryotes than to Bacteria. This evolutionary connection highlights a closer relationship between Archaea and human cells.