Moxie Marlinspike happens to be a well-known cryptographer, entrepreneur, and computer security researcher. He is widely recognised as the founder of the Signal app, a secure messaging platform that is popular for its privacy features.
As the co-founder of the Signal Technology Foundation, Moxie served as the first CEO of Signal Messenger LLC. More than just a developer, he has played a major role in shaping how people think about privacy on the internet. His Signal Protocol encryption is so popular that it is used by major apps like Facebook Messenger, WhatsApp, Google Messages, and Skype.
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As far as Moxie Marlinspike’s early life is concerned, not much is revealed. However, we do know that his real name is Matthew Rosenfield, but he prefers to be known by his pseudonym Moxie Marlinspike.
According to some online sources, Moxie was born in the early 1980s, but his exact birth date is not confirmed. Right from the start, he has kept his personal life private and out of the media. However, he is believed to have grown up in Georgia, U.S., and had a deep interest in computers from a young age.
Moxie Marlinspike started his career as a computer security researcher and worked for various tech companies, include BEA Systems Inc. In 2010, he co-founded Whisper Systems and served as a CTO in the company.
During his early career, Marlinspike also created tools like GoogleSharing that allowed users to browse the web anonymously through Google. Besides that, he developed a cloud-based WPA cracking service that helped users test the strength of their Wi-Fi passwords. These tools showcased his knowledge and interest in digital security and privacy.
Moxie Marlinspike rose to fame after he launched Signal, a free and open-source messaging app that offers end-to-end encryption. Unlike messaging other apps, Signal does not collect user data which made it immensely popular among users.
In 2018, Moxie co-founded the Signal Technology Foundation with WhatsApp co-founder Brian Acton. The goal was to support open-source privacy technology that could run independently.
The Signal Protocol that Moxie developed became the standard in message encryption and big companies like Facebook, Google, and Microsoft started using it on their messaging platforms.
In 2022, Moxie stepped down as the CEO of Signal. But he continues to support the foundation and its mission.
As mentioned before, Moxie Marlinspike is extremely private when it comes to his personal life. There is no public information available about his relationships as he never talked about this aspect of his life in interviews. He is only focused on his work and ways to make the internet more secure.
As of 2025, Moxie Marlinspike’s net worth is estimated to be between $1 and $5 million. His primary income source comes from his company Signal and other projects he works on. Despite being successful, Moxie prefers to live a humble life and doesn’t show off his wealth. His main focus remains on protecting people’s digital rights and privacy.
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