Directly uses Rollup Helper. 

Directly delivers expert crowdservice, a new model for customer care. Our crowdservice helps companies tap the free cycles and skills of the best and brightest in their company and community to deliver a superior customer experience at a fraction of the traditional cost. Directly is one of Entrepreneur Magazine’s Brilliant 100 Companies. Investors include True Ventures, CrunchFund, Toba Capital and prominent angels Esther Dyson and Ray Lane. See