- LBi, a Dutch marketing and technology agency
- Lost Boys (professional wrestling), a professional wrestling tag team in the American independent circuit during the mid-1990s
- Guerrilla Games, formerly known as Lost Boys Games, a Dutch video game developer
- Lost boys (Mormon fundamentalism), young men excommunicated or pressured to leave polygamous groups
- Lost Boys of Sudan, a Sudanese refugee resettlement program begun in 2001
- Lost Boys Studios, a visual arts school in Canada
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