There’s a spirit of philanthropy among many of Fortune’s 100 Best Companies to Work For, including quite a few that make sure workers who take initiative are treated well. We spoke with businesses who’ve committed resources to making the world a better place, including offering employees paid time off to work on projects important to them. Many of the companies below are, unsurprisingly, in the tech industry.

Here are 10 companies that support employees for giving back to their communities.

Note: The companies are listed by the number of hours of paid time off granted for volunteering each year.