Aleph Search Clear vs tko-subs: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Aleph Search Clear is a commercial external attack surface management tool by Aleph Networks. 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.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Mid-market and enterprise security teams managing third-party and supply chain risk need Aleph Search Clear because it finds exposure across both surface and deep web in a single query, then automates the monitoring that actually catches when your vendors get compromised. The tool covers five NIST CSF 2.0 functions from asset discovery through adverse event analysis, and its KYC/KYS alignment with DORA and NIS 2 saves compliance teams weeks of manual mapping work. Skip this if your organization only needs traditional OSINT for incident response; Aleph is built for continuous ecosystem risk oversight, not one-off research.
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.
