[4] In 1998, at the age of 16, Cohen founded the website JewishNet.co.uk, an early social networking community which later became SoJewish.com, with £150 and floated it on the Alternative Investment Market (AIM) ten months later.

In November 2000, two weeks after Apple lodged its UK trademark application for the term 'iTunes', Cohen's company CyberBritain Group registered the iTunes.co.uk domain name and redirected it to a music search engine.

[10] He produced investigations during his time at Channel 4 News, including an award-winning exposé of security flaws in contactless credit card use.

[16] In May 2012, Cohen founded the Out4Marriage campaign for marriage equality in the United Kingdom which features politicians, religious leaders, and celebrities explaining on YouTube videos why they support changing the law to allow gay couples to marry.

[17] In December 2024, the BBC and several other national UK newspapers published allegations that accused Cohen of "bullying and sexual misconduct" towards PinkNews staff.

Various whistleblowers accused Cohen of "creepy", "sleazy", and misogynistic behaviour, including asking female members of staff to act as a surrogate for him and his partner and sexually propositioning an employee.