These two types of investment products have their similarities and differences.
First, the similarities:
Both mutual funds and hedge funds are managed portfolios. This means that a manager (or a group of managers) picks securities that he or she feels will perform well and groups them into a single portfolio. Portions of the fund are then sold to investors who can participate in the gains/losses of the holdings. The main advantage to investors is that they get instant diversification and professional management of their money.
Now, the differences:
Hedge funds are managed much more aggressively than their mutual fund counterparts. They are able to take speculative positions in derivative securities such as options and have the ability to short sell stocks. This will typically increase the leverage - and thus the risk - of the fund. This also means that it's possible for hedge funds to make money when the market is falling. Mutual funds, on the other hand, are not permitted to take these highly leveraged positions and are typically safer as a result.
Another key difference between these two types of funds is their availability. Hedge funds are only available to a specific group of sophisticated investors with high net worth. The U.S. government deems them as "accredited investors", and the criteria for becoming one are lengthy and restrictive. This isn't the case for mutual funds, which are very easy to purchase with minimal amounts of money.
Both mutual funds and hedge fund are professionally managed investment vehicles, but there are a couple major differences. Just about any investor has access to mutual funds. They’re diversified, easy to buy and easy to sell. Hedge funds on the other hand are only open to accredited investors who have a net worth of at least a million dollars or an income of at least $200,000 over the last 2 years. Hedge funds often have lock up periods, where for a period of time you cannot get your money out of the fund due to their propriety trading methodology that often involves leveraging.
Although not always the case, hedge fund fees are usually much higher than that of mutual funds. The typical two and twenty fee represents the 2% fee on assets under management and the additional 20% of fund profits, which goes to the hedge fund.