Moxie Marlinspike, the co-founder and chief executive of encrypted-messaging app Signal, has resigned.
He blogged it was a "good time to replace myself as CEO" after working on Signal for over a decade.
Signal recently enabled crypto-currency payments within the app, which has concerned some users. Mr Marlinspike remains a board member of the Signal Foundation, while the board's executive chair, Brian Acton, becomes interim chief executive.
[...] Mr Marlinspike - whose real name is Matthew Rosenfeld - blogged he had always hoped to reach a point where Signal could "grow and sustain" beyond his involvement.
"I was writing all the Android code, was writing all of the server code, was the only person on call for the service, was facilitating all product development, and was managing everyone," he wrote. "I couldn't ever leave cell service, had to take my laptop with me everywhere in case of emergencies, and occasionally found myself sitting alone on the sidewalk in the rain late at night trying to diagnose a service degradation."
More than 40 million people now use Signal.