Mr Assange said potential donors can now use monero and zcash as well as bitcoin and litecoin payment options in an attempt to sidestep a “financial blockade”.
He took to Twitter to complain about “politically induced financial censorship” that violated US donors’ First Amendment rights and their right to freedom of association.
Mr Assange, who has now spent eight years in exile in the Ecuadorian embassy in London, said: “US donors are the majority of our donor base.”
Berlin-based freedom of information campaigners Wau Holland collected almost £1million in donations for WikiLeaks before it was cut off by PayPal in 2010 for “activities that encourage, promote, facilitate or instruct others to engage in illegal activity”.
Wau Holland’s charitable status was temporarily revoked by German authorities but has since been reinstated.
Mr Assange claimed US authorities had also attempted to build an initial “financial blockade” to silence the whistleblowing site back in 2010.
He said: ”The financial blockade was one of several fronts we faced, along with a US grand jury, a Pentagon ‘war room’ and an intense propaganda offensive by the US military, the political class and virtually all establishment media.”
He said he had notice an increasing anxiety in US donors over the legality of supporting WikiLeaks and said the US-based Freedom of the Press Foundation (FPF) was coming under pressure to stop processing donations to Wikileaks.
Mr Assange said: “If it bows to political pressure it becomes part of the problem it was designed to solve.”