How do we get Greenleaf ONE for our nonprofit? Sign up now! We'll get you started with a quick 15 minute call. Please request a day/time that will work for you and we’ll follow up to secure your call time. Company Select Day * Best time to reach you * a.m. p.m. either First Name * Last Name * Email * Phone * Organization Name * Website Greenleaf ONE is the Open Nonprofit Engine to drive growth and make good happen.