The closure came a day after hackers broke into the system, and Bahnhof feared that hackers may have tried to access subscribers' bank details.
On Thursday Bahnhof announced it was ripping up its contract with the controversial company, saying it wanted to choose integrity first.
In a press release Bahnhof wrote: "Freedom of speech and integrity are our core values. With Lexbase our values came into conflict with each other, because ordinary people get exposed. So we chose integrity".