Heinz Heise

Heinz Heise is a German publishing house. It was created in Hanover in 1949 as an address and telephone directory publisher, then later expanded to include magazines and loose leaf collections. In 2002, the company was divided into independent societies, all of which came under the umbrella of their parent company, the Heise Media Group.

Heise publishes the magazines iX, c't, Technology Review and the online magazine Telepolis. These publications feed into the Heise News Ticker, which ranks among the most successful German language Slashdot, as it is a very high-volume news site and has a technology-savvy audience. The so-called Heise effect is the German equivalent to the Slashdot effect (though on a smaller scale) and many smaller web sites were crashed by the Heise effect (heisen, geheist or Heise-DDoS are German terms for slashdotting).

The Heise forum is also well known for its troll wars.