Citizen

Citizen is a public safety technology company that operates the largest public safety app in the United States, delivering real-time 911 alerts, crisis responder assistance and live incident tracking to millions of daily users across more than 60 cities. Since launch the app has sent over 10 billion alerts. Alongside the consumer product, Citizen Enterprise provides real-time situational intelligence for organisations including hospitals, venue operators and corporate security teams.

The engineering work is grounded in high-volume, real-time systems. Technical domains include AI/ML, audio analysis, video moderation, notification delivery and real-time alerting. The company processes thousands of hours of audio and hundreds of videos each day, and its stated focus is on speed and reliability, delivering critical information to people within seconds during incidents such as fires, missing children and criminal activity.

Citizen operates in the United States across public safety, consumer safety, healthcare, corporate security, venue operations and emergency services. It has raised over $100M and is backed by investors including Founders Fund, 8VC and Greycroft. The company describes its mission as making the world a safer place and its long-term vision as a global safety network combining technology and community.