Tester Flash (Flash Cyber) is a remote cybersecurity audit tool developed by Sekost, a French company specializing in cybersecurity assessments for SMBs, accountants, and IT service providers. The tool provides organizations with a free overview of their internet-facing attack surface without requiring installation or commitment. The Flash Cyber assessment delivers results within minutes, providing users with a synthetic mapping of their external exposure, a risk score, and key alert points. The tool is designed to be accessible and educational, targeting organizations that need quick visibility into their security posture. Sekost positions this as an entry-level diagnostic service that operates remotely, eliminating the need for on-premises software deployment. The company offers this Flash assessment as a free service to give organizations an initial understanding of their external security risks before potentially engaging in more comprehensive audit services. The tool is part of Sekost's broader portfolio of remote cybersecurity audit solutions aimed at making security assessments more accessible to small and medium-sized businesses that may lack dedicated security teams.