Quack, quack. MotherDuck is coming out of stealth mode. The Seattle startup lifted the hood Tuesday on its data analytics system based on the open-source platform DuckDB. It also announced total funding of $47.5 million to date, including a $35 million Series A round led by Silicon Valley venture firm Andreessen Horowitz, following a $12 million seed round led by Redpoint Ventures. Other backers include Amplify Partners, Madrona Venture Group, SV Angels and Altimeter Capital. MotherDuck, valued at $175 million, was founded by Jordan Tigani. He previously worked as the chief product officer at database vendor SingleStore.