RTI International (formerly Research Triangle Institute) is a nonprofit organization headquartered in the Research Triangle Park in North Carolina that provides research and technical services. It was founded in 1958 with $500,000 in funding by local businesses and the three North Carolina universities in the Research Triangle region. RTI started with departments for research in isotopes, operational sciences and statistics. It restructured into four departments in 1971 and later created the Office for International Projects, now called the International Development Group.
RTI later split into eleven departments, including Health Research, Drug Discovery & Development, Education & Training Research, Survey Research, among others. The US Agency for International Development has come to account for 35 percent of RTI's research revenue. RTI research has covered HIV/AIDS, healthcare, education curriculum and the environment, among others.