DDactic Attack Surface Discovery is a commercial external attack surface management solution by DDactic. tko-subs is a free external attack surface management solution. Features, integrations, deployment and the company behind each one, side by side.
Scans domains to discover attack surface, vulnerabilities, and generate hardening
A tool for detecting and taking over subdomains with dead DNS records
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Based on what each listing shows: deployment, company size, price and open source.
DDactic Attack Surface Discovery fits if you want a cloud product.
tko-subs fits if you need to run it on your own servers, you need a free product and you want an open-source product.
Common questions when comparing DDactic Attack Surface Discovery vs tko-subs for external attack surface management.
DDactic Attack Surface Discovery: Scans domains to discover attack surface, vulnerabilities, and generate hardening. Built by DDactic.
tko-subs: A tool for detecting and taking over subdomains with dead DNS records.
The table above shows where their features, integrations, deployment and company size fit differ.
DDactic Attack Surface Discovery is made by DDactic founded in 2026-01-01T00:00:00.000Z. tko-subs is open-source with 766 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. DDactic Attack Surface Discovery and tko-subs are both External Attack Surface Management products, and both cover Subdomain Enumeration. Key differences: DDactic Attack Surface Discovery is Commercial while tko-subs is Free, tko-subs is open-source. Use the table above to see where features, deployment and company size fit differ.
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