Daniel M. Borislow (born September 21, 1961) is an American entrepreneur, inventor, and thoroughbred horse breeder. Originating in the Philadelphia, Pennsylvania area, Borislow attended Widener University and worked in cable construction and landscaping before going into the telephone business. He founded Tel-Save, Inc. to resell access to AT&T long-distance lines in 1989. Borislow took the company public in 1995, and two years later brokered a $100 million deal with AOL that made it the exclusive telephone service of its users. At its peak in early 1998, Tel-Save had sales of $300 million and was valued by Wall Street investors at $2 billion. However, due to the financial strain of paying off the AOL deal, Tel-Save lost $221 million in 1999, and Borislow sold his stock and retired.