Neon has gone offline, at least for now, after a security flaw allowed anyone to access the phone numbers, call recordings, and transcripts of any other user

TechCrunch discovered the security flaw during a short test of the app on Thursday. We alerted the app’s founder, Alex Kiam, to the flaw soon after our discovery.

Kiam told TechCrunch later Thursday that he took down the app’s servers and began notifying users about pausing the app, but fell short of informing his users about the security lapse.

For example, here you can see the transcript from our test call between two TechCrunch reporters confirming that the recording worked properly.

When asked, Kiam did not immediately say if the app had undergone any security review ahead of its launch, and if so, who performed the review. Kiam also did not say, when asked, if the company has the technical means, such as logs, to determine if anyone else found the flaw before us or if any user data was stolen.