Domain Beacon vs tko-subs: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
Domain Beacon is a commercial external attack surface management tool by CVAAT Solutions. tko-subs is a free external attack surface management tool. Compare features, ratings, integrations, and community reviews side by side to find the best external attack surface management fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
CST VerdictBased on our analysis of core features, company size fit, deployment model, here is our conclusion:
Pentesters and bug bounty hunters looking to quickly identify subdomain takeover opportunities should reach for tko-subs; it's purpose-built for finding dead DNS records that expose attackers to domain hijacking, and the 766 GitHub stars reflect active use in offensive security communities. The tool excels at the reconnaissance phase where speed matters, automating what would otherwise be manual domain validation across hundreds of subdomains. Skip this if you need deeper DNS validation, certificate transparency correlation, or integration with broader asset discovery platforms; tko-subs does one thing and doesn't attempt the ecosystem around it.
Data verified Sep 2026
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