Internet giants should re-invest some of their "eye-watering" profits into efforts to stamp out child abuse images online, a chief constable has said.
Mike Barton challenged firms to do more to stop the content appearing in the first place, as police arrest hundreds of suspected paedophiles every month.
The head of Durham Constabulary also called on social media sites to ban users responsible for abuse or harassment on the platforms for life.
Mr Barton, the national policing lead for crime operations, questioned why it was "so difficult" to remove child pornography from the web.
He said forces are making more than 400 arrests in relation to indecent images of children every month, but police cannot tackle the problem alone.
The senior officer said the onus should be on the companies that invented and run the online platforms.
Barton stopped short of identifying specific firms, saying all of those in the arena have a responsibility.
He pointed to the emerging trend for live-streaming of child abuse, saying it was one of the most odious forms of criminality on the internet.
The police chief referred to a case involving graffiti which prompted a protracted legal process in the US.
Figures published earlier this year indicated that forces in England and Wales recorded an average of 15 child sex offences involving the internet every day in 2016/17.
The rising caseload has emerged as a major challenge for police, and earlier this year another chief constable sparked controversy by suggesting those who viewed indecent images of children should not always face criminal charges.
Simon Bailey, national policing lead for child protection, said lower level offenders should be dealt with through counselling and rehabilitation while officers focus on the most dangerous individuals with access to children and those looking at the most serious images.
Meanwhile, Mr Barton called on social media firms such as Twitter and Facebook to permanently "kick off" those who use their sites to bully, harass and stalk other users.