Inside (stylised as InSIDE) is a reality competition web and television series created and hosted by British YouTube group the Sidemen, first premiered on 2 June 2024 on the Sidemen YouTube channel. The series features celebrity and internet personality contestants who compete in challenges to secure a prize fund totalled at ã1 million, with everything they buy or do costing money from the prize fund.
From the second series, it was acquired globally by Netflix, who also commissioned an American version of the show, Inside: USA. For the first two series of Inside, the finalists faced a split or steal decision with the remaining prize fund. However, this changed from series three, with only one contestant being eligible to win the series.
Contestants are selected to stay in a house for a week where they compete in various challenges throughout their stay. Failure in these challenges results in the loss of money from the final prize. In addition to this, contestants are given access to a tuck shop, which features a small selection of goods. The cost of the products is taken from the prize fund, with the items having a significant markup in order to deter contestants from getting them. The first two series of Inside ended with the finalists getting a choice to split or steal the remaining prize fund. This was changed from the third series, with only one contestant eligible to win the prize fund.
The first series aired on YouTube and Side+ in 2024, but Inside moved to Netflix from the second series in 2025, with companion shows available on Side+. In November 2024, the Sidemen announced an American spin-off series, Inside: USA, also produced for Netflix. The second series premiered on 16 March 2025, while the first series of Inside: USA was released on 21 September 2025. The third series aired in March 2026.