Cyren Inc. was a cloud-based Internet security technology company that provided security services and threat intelligence services to businesses. It offered a range of services including web security, DNS security, anti-spam solutions, phishing detection, ransomware protection, URL filtering, malware detection, and botnet attack prevention. Cyren also provided endpoint protection for mobile devices and Internet of Things gateways. Major clients included Microsoft, Google, Check Point, Dell, T-Mobile, and Intel. The company announced its closure in February 2023. At its peak, Cyren employed approximately 220 with headquarters in McLean, Virginia, and offices in Herzliya, Berlin, Bracknell and Reykjavík. Its common stock was listed on the NASDAQ Stock Exchange under the ticker symbol CYRN. In January 2019, Cyren announced that it was voluntarily delisting from the Tel Aviv Stock Exchange. Cyren was among the most well-funded cybersecurity firms in the Washington, D.C., metro area according to a 2018 study. Wikipedia