# Frequentis

> <p><strong>Known for:</strong> Vienna, founded 1947. Air-traffic-control voice and data systems — used by 40+ countries' national ATC providers. Plus public safety (police, fire, ambulance dispatch) and maritime communications. If you've ever heard a pilot talk to a tower in Europe, the comms layer was probably Frequentis. Quietly globally dominant in a category most people don't know exists.</p>

https://www.frequentis.com