Docker, the company behind the Docker open source platform for building and running distributed applications, said on Tuesday it has raised $40 million in its third round of funding, led by Sequoia. Previous backers Benchmark, Greylock Partners, Insight Ventures, Trinity Ventures and Jerry Yang also participated in the round, which the company will use to drive adoption of its platform and expand its ecosystem of application developers, system administrators, platform providers and technology partners. Bill Coughran, who joined Sequoia after eight years as a senior vice president of engineering at Google, will represent Sequoia on the Docker board. Launched in early 2013, Docker is an open platform that enables any application to be created and run as a collection of containers that work across virtually any infrastructure. The platform has been downloaded more than 21 million times, and is used by companies such as eBay, Baidu, Yelp, Spotify, Yandex and Cambridge HealthCare. Read more.