https://www.cnbc.com/2018/06/05/github-interest-from-google-and-others-revenue-about-300-million.html

Microsoft was not alone in chasing GitHub, which it agreed to acquire for $7.5 billion on Monday. Representatives from Alphabet's Google were also talking to the company about an acquisition in recent weeks, according to people familiar with the deal talks.

The talks for GitHub went on for several weeks, according to several other people familiar with the process, but at the end the auction was not close, suggesting Microsoft's bid was high enough to keep Google at bay. GitHub has, in the past, also attracted takeover interest from companies such as Amazon, according to people familiar with the matter.