Curtail is a company that offers a network traffic analysis solution and continuous security tools. It provides tools to detect application flaws, configuration issues, and potential zero-day vulnerabilities, such as Curtail ReCover, which detects anomalies including zero-day attacks and automatically diverts traffic to systems to maintain business operations; Curtail ReGrade, which detects, records, and reports anomalous application behavior among different versions of software in real-time; etc.