The co-founder of the Gaydar brand has been found dead outside his south London apartment.
Gary Frisch came to the UK from South Africa in 1997
Gary Frisch, who launched the online dating website in 1999, was found lying injured on the ground outside his Commodore House flat on Saturday.
Police are investigating whether the 38-year-old, from South Africa, fell or jumped from his eighth floor balcony.
A Wandsworth CID spokeswoman said the death was "unexplained". The death is not being treated as suspicious.
Prior to launching Gaydar, Mr Frisch co-founded IT consultancy firm QSoft, after moving to the UK from South Africa in 1997.
In a statement, QSoft's directors said: "It is with great regret that we make this announcement. Gary was a highly regarded leader and colleague who cared first and foremost about the gay and lesbian community that we serve.
"He was an accomplished entrepreneur and a very generous man who also cared deeply about the people who worked for and with him."
A spokesman for QSoft said an event planned to take place in London this Thursday to mark the fifth birthday of GaydarRadio would go ahead as planned.