Mumbai-based Ketto Online Ventures Pvt Ltd, which operates an online crowdfunding platform, has raised Rs 4.4 crore ($700,000) in a fresh angel investment round led by one of its existing investors Pradyumna Dalmia, co-founder of Calcutta Angels and Sudhir Rao, deal champion of The Chennai Angels & co-founder of IndusAge Partners, as per a press statement.