shouldiuse.io

VERDICT

Should I use SubDomains Finder?

The #1 subdomain finder and scanner. Instantly discover all subdomains of any domain, no install required. - subdomainsfinder.com

Worth it. Buy if you need fast, free subdomain recon with IPs, ports, and ASN data and accept passive OSINT results. Skip it if you need guaranteed-fresh scanning, vendor security documentation, or support — use Shodan or Pentest-Tools instead.

Confidence

Medium. Based on ~20 public sources: official pages, Apify listings, and directories. No independent reviews or security findings found.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityNo support evidence in sources
  • Security posture

Pricing

$0

Free web tool

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
API via Apify actorsfrom $0.005/domain

Best for

  • Bug bounty hunters
  • Pentesters doing recon
  • OSINT researchers
  • IT admins auditing their own attack surface

Not for

  • Enterprises needing continuous attack-surface monitoring with SLAs
  • Teams needing active deep scanning — it aggregates OSINT only, no target scanning
  • Buyers requiring vendor security docs, SOC2, or procurement-grade assurance
  • Anyone wanting guaranteed support — no reviews or support evidence exists

Gotchas - check before you buy

medium

API access runs through third-party Apify actors; pricing and reliability vary per actor, not official vendor pricing

medium

No substantive security page found — vendor risk checks may stall procurement

medium

No support-quality or review evidence anywhere in sources — you are on your own

low

Passive aggregation means stale subdomains; verify results with live DNS before acting

Pros and cons

Pros

  • Free online tool, no install required
  • Browser-based OSINT tool
  • Shows subdomains with IPs, open ports, ASN, hosting data
  • API route is cheap: $0.005 per domain, not per subdomain
  • Claims passive aggregation only — aggregates public data, does not scan targets

Cons

  • Aggregates OSINT only — results can be stale or incomplete
  • No independent user reviews found in sources
  • Markets via SEO competitor-alternative pages, not customer proof
  • Security page shows no content in sources reviewed

Sources & method

Analyzed 9/20/2026 - 10 sources - No known vulnerabilities found in the sources reviewed.

official x5review x3security x1news x1

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