Alan Marshall Meckler (born 1945) is an American internet pioneer and publishing executive. Meckler started his own publishing business in 1971 which evolved into Mecklermedia Corporation in the 1990s until the company was acquired by Penton Media in November 1998, and founded several print magazines including Virtual Reality World, CD-ROM World, and Internet World. Mediabistro was purchased in 2007 and later sold to Prometheus Global Media in 2014. Currently Meckler is CEO of 3DR Holdings LLC based in New York City which offers news coverage of the additive manufacturing fields and quantum computing through websites and trade shows.