Signal’s Brian Acton talks about exploding growth, monetization and WhatsApp data-sharing outrage

Brian Acton is crossing paths again with Facebook. Over more than a decade of building and operating WhatsApp, the company’s co-founder first competed against and then sold his instant messaging app to the social juggernaut. Only a few years ago he parted ways with the company that made him a billionaire in a bitter split over messaging and privacy.

Now Acton says the ongoing outrage over what Facebook has done to the messaging service he helped build is driving people to his latest project — Signal. Acton, who serves as the executive chairman of the privacy-conscious messaging app’s holding company, told TechCrunch in an interview that the user base of Signal has “exploded” in recent weeks.

“The smallest of events helped trigger the largest of outcomes,” said Acton on a video call. “We’re also excited that we are having conversations about online privacy and digital safety and people are turning to Signal as the answer to those questions.”

“It’s a great opportunity for Signal to shine and to give people a choice and alternative. It was a slow burn for three years and then a huge explosion. Now the rocket is going,” he said.

The event Acton is referring to is the recent change in data-sharing policy disclosed by WhatsApp, an app that serves more than 2 billion users worldwide.

Through an in-app alert, WhatsApp has asked users in recent days to agree to new terms of conditions that grants the app the consent to share their personal data with Facebook. Users will have to agree to these terms by February 8 if they wish to continue using the app, the alert said.

Acton said WhatsApp is grappling with incorporating monetization features while still protecting people’s privacy. And its new “complicated policy” has forced WhatsApp and the media to scramble for explanations and “everyone is confused.”

Acton did not disclose how many users Signal has amassed in recent weeks, but he said the app currently ranks at the top on App Store in 40 countries and on Google Play Store in 18 countries. (Signal is not the only app that users have explored in recent days as their new home. Telegram said on Tuesday noon that more than 25 million users had joined the platform in the last 72 hours. The app now has over 525 million monthly active users.)