The announcement came after what the group called a blockade by US-based finance companies.
This followed its disclosure on the internet of hundreds of thousands of secret US government files and diplomatic cables.
Wikileaks founder Julian Assange said that since last December an "arbitrary and unlawful financial blockade" had been imposed by Bank of America, Visa, MasterCard, PayPal and Western Union.
"The attack has destroyed 95% of our revenue," he said.
BBC News - Struggling Wikileaks stops publishing classified files (external - login to view)