Outpost24 Attack Surface Management vs OWASP Amass

Outpost24 Attack Surface Management is a cloud-based service for finding and monitoring an organization’s internet-facing assets. It discovers domains, IP addresses, cloud infrastructure, network hosts, ports, fully qualified domain names, and shadow IT through passive, hybrid, and advanced reconnaissance. Asset discovery does not require agents, credentials, or network access. Continuous scanning, change detection, real-time alerts, and automated monitoring track changes over time. Automated attack-surface scoring and contextual analysis prioritize assets and findings by exposure, impact, and asset criticality. Dashboards, prioritized trackers, risk trends, and remediation-progress tracking support follow-up. Security features include subdomain and look-alike-domain discovery, certificate monitoring, advanced port scanning, customizable alerts, and reporting. Digital risk protection can identify leaked credentials, documents, and information, monitor underground forums, and track unauthorized brand use on social media. The platform offers API access and integrations with Jira, ServiceNow ITSM, Palo Alto Cortex XSOAR, AWS, Microsoft Azure, Axonius, Microsoft Teams, Slack, CSC Domain Manager, and Microsoft Sentinel. It is accessed through a secure browser login, with pricing on request and customized packages.

OWASP Amass is a free, open-source framework for mapping attack surfaces and discovering external assets using OSINT and reconnaissance. It combines a collection engine, an asset database, and the Open Asset Model, which describes internet-exposed assets and their types, properties, and relationships. Collection sources include APIs, certificates, DNS, routing, scraping, web archives, and WHOIS. The database can store, manage, and retrieve discoveries for long-term tracking. The project says its mapping covers physical and digital assets, going beyond basic subdomain enumeration. Installation options include building from source with Go, Homebrew, an official Docker image, and Docker Compose. The project lists Go, network connectivity, DNS resolution, and basic network reconnaissance knowledge as requirements. Amass runs on Linux, macOS, and Windows, with self-hosted deployment. The v5.1.1 release notes mention an initial version of the engine REST API. The project is an OWASP Flagship Project and lists Apache 2.0; some subcomponents have separate licenses. The software costs nothing.