Gary Frisch, the co-founder of Gaydar who fell to his death in February, left an estate worth more than £6.5m.
Mr Frisch, originally from South Africa, established Gaydar with his business partner and then-boyfriend Henry Badenhorst in 1999.
Mr Badenhorst is the main beneficiary from his will.
As the couple, who split up several months before Mr Frisch’s death, had never entered into a civil partnership, Mr Badenhorst will have to pay inheritance tax of more than £2m.
In April Westminster coroner’s court heard that Mr Frisch, 38, leapt from the balcony of his eighth-floor Battersea apartment.
Dr Peter Wilkins, a pathologist, said raised levels of ketamine were found in Mr Frisch’s blood and liver.
“Mr Frisch had not yet reached 40, he was successful and popular but died as a result of drug use,” the coroner, Dr Paul Knapman, said.
The death was recorded as misadventure.
At the time of his death, QSoft Consulting, the company he founded with Mr Badenhorst, issued this statement:
“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.
“Gary’s legacy as a co-founder of the Gaydar phenomenon is immense and it is one that we shall both celebrate and continue into the future. Gary will never be forgotten and is deeply missed by us all.”