Y Combinator-backed Charityvest is expanding access to a special category of charitable giving accounts known as donor-advised funds, offering free accounts for individuals and powering easy to use workplace giving charitable match programs for employers. On Giving Tuesday, the company will launch zero-fee stock contributions, allowing anyone to donate stocks and ETFs to their personal charitable foundation, from any brokerage, for free. The venture recently raised $2.3M of Seed investment, bringing its total capital raised...