Who are the competitors of Boom Supersonic?

Who exactly are the primary competitors that Boom Supersonic faces in the race to revolutionize supersonic travel? Are there other companies working on similar hypersonic jet technology, or does Boom Supersonic stand out as a lone pioneer in this space? Additionally, how do these competitors compare in terms of their funding, technological advancements, and projected timelines for commercialization? Understanding the competitive landscape is crucial for investors and industry watchers alike.