[5] She is the author of 3 books: Once You're Lucky, Twice You're Good (2008), which also goes under the title The Stories of Facebook, Youtube and Myspace; Brilliant, Crazy, Cocky: How the Top 1% of Entrepreneurs Profit from Global Chaos (2011); and A Uterus Is A Feature, Not A Bug (2017).

In 2012, Lacy founded technology news site PandoDaily with a reported $2.5m investment from investors including Marc Andreessen, Peter Thiel, Tony Hsieh, David Sze, Jim Breyer, Reid Hoffman, Chris Dixon and Josh Kopelman.

[7] On November 17, 2014, then-Uber executive Emil Michael allegedly said Uber should consider hiring a team of opposition researchers to dig up dirt on critics in the media including Lacy, and suggested a $1 million smear campaign,[8][9] after PandoDaily featured a story[10] criticizing the misogynist practices and culture of Uber.

[11] Lacy cites the history of harassment, threats, and betrayals she saw and experienced in the Silicon Valley area as the reason for her exit.

Lacy co-founded Chairman Mom, a subscription-based question-and-answer forum targeted at working mothers, in April 2018.