Charity Guide was a tax-exempt, nonprofit 501(c)(3) organization in the United States dedicated to inspiring and facilitating volunteer opportunities through an approach known as flexible volunteerism.

Charity Guide was based in Wilmette, Illinois Based on the premise that many would-be volunteers have hectic and unpredictable schedules, making it difficult for them to commit to traditional, regular volunteer schedules, Charity Guide focused on listing flexible volunteer opportunities through which people can help a cause of their choosing in as little as 15 minutes.

Also known as “Volunteering On-Demand,” the approach sought to give busy people a way to help a cause any time, from anywhere, without having to commit to a schedule or register in advance.

Service projects include paid listings as part of VolunteerGuide.org's corporate citizenship program.

[3] Charity Guide was founded in 2000 by internet marketing and advertising consultant, Michael Organ, who served as executive director.