Seattle ranked third in the software-as-a-service category among U.S. ecosystems for early stage funding.Seattle's software clout is getting a boost from the AI boom, with Microsoft and Amazon powering much of the cloud computing infrastructure.The region has a significant percentage of AI engineers in the U.S. and has seen several AI-related startups raising capital and getting acquired.Overall, Seattle ranked fifth in total funding among U.S. ecosystems, showing improvement compared to previous years.