ClickHouse co-founders Yury Izrailevsky, Aaron Katz and Alexey Milovidov.Source: ClickHouseDatabase technology startup ClickHouse Inc. has raised $400 million in a new funding round that values the company at $15 billion — more than double its valuation less than a year ago. The large deal is a signal of investors’ interest in companies that power artificial intelligence applications, competing with the likes of Databricks Inc. and Snowflake Inc. ClickHouse, which was spun out more than four yea...