My email is billy.perrigo (at)
The best way to reach me is via that address or through Signal, a free end-to-end encrypted messaging app, which has a strong track record of not keeping or sharing data with governments or companies. My Signal number is +44 7583 zero 65 zero 71.
If you're contacting me about something sensitive, I'm happy to speak completely off the record and discuss how to move forward. If we've made contact on this basis, nothing you tell me will make it into any of my work, or to anybody else, unless you explicitly agree.
Protecting my sources is my top priority, and I take cybersecurity seriously.
If you are a person in the tech industry who is considering speaking out (publicly or anonymously) about a matter in the public interest, I recommend taking a look at the Tech Worker Handbook.