In addition to an annual RoC and penetration testing, Level 1 merchants and service providers must undergo quarterly network scans to get and stay PCI compliant. Below is a list of trusted approved scanning vendors (ASVs).
Clone Systems
Clone Systems provides PCI compliance scanning so you can comply with the standard and safeguard your customer data.
Prescient Assurance
Prescient Assurance can help you meet quarterly scanning and reporting requirements and help you identify and remediate vulnerabilities as an ASV.
