Meet the Inspiring Women in Tech From Time's Top 100

Who she is: This 46-year-old Harvard grad was one of the original Google employees as a marketing manager — and in fact, the company started in her garage.

What she does: Now the CEO of YouTube, Wojcicki is reshaping the video platform to make it even better. With tens of billions of views per year, YouTube is going strong under its new CEO's direction.

Why she's a badass: Wojcicki is married with five kids, and she's been an outspoken advocate for working moms. Wojcicki promotes paid maternity leave and proves that women can have families while also achieving vast success in the business world.

Who she is: The youngest self-made female billionaire ever, the 31-year-old dropped out of Stanford during her undergraduate engineering studies at 19 to change the world.

What she does: Holmes is founder and CEO of her own health technology company, Theranos. The company's needle-free blood test system is well on its way to revolutionizing health care.

Why she's a badass: Holmes is basically a biotech superhero, and she's using her powers for good. Her painless blood sample invention is extremely accessible and affordable, which means that preventative testing for diseases is right around the corner. While she has encountered stumbling blocks in a male-dominated industry, Elizabeth works hard and won't stop until she's changed the world of health care.