Sleepio is a digital sleep-improvement program featuring cognitive behavioural therapy (CBT) techniques developed by sleep scientist Colin Espie and ex-insomnia sufferer Peter Hames.

[2] In a commentary on this research published by The Lancet, Sleepio was described as "a proven intervention for sleep disorders using the internet".

[3] Sleepio is the first program from Big Health, the behavioural medicine company co-founded by Professor Colin Espie and Peter Hames.

[8] Sleepio was available free of charge via the NHS to people over 18 living in the English counties of Oxfordshire, Berkshire and Buckinghamshire.

[11] The results of the cognitive behavioural therapy group showed Sleepio to be comparable in effectiveness to face-to-face CBT.