Although bitcoin is the leading cryptocurrency on the market, there are several different alternative digital coins are available on the market. Altcoins have the similar background as bitcoin, they are all based on blockchain technology although different technical algorithms and features are associated with each altcoin.
As of today there are almost thousand different altcoins have been issued to the market. The number of alternative digital currencies is growing every week as new coins hit the market through the ICO the Initial Coin Offering processes.