Fortune: “There’s a new player in the world of freelance marketplaces. It’s called Braintrust and, like incumbents TaskRabbit and Upwork, it provides a website to connect contract workers and firms looking to hire them. But Braintrust stands out for a number of reasons—including its high profile clients. Since launching in 2018, the San Francisco startup has attracted blue chip companies like Blue Cross Blue Shield, Porsche and Nestle to its platform, as well as the space agency NASA. Until now, Braintrust has chosen to operate in what Silicon Valley types call “stealth mode,” relying on word-of-mouth and eschewing media publicity…”