DomainTools occupies a unique position in the domain intelligence space. It’s not a free-tool website — it’s a B2B threat intelligence platform used by enterprise security teams, incident response units, and threat analysts who need historical WHOIS records, passive DNS data going back years, and attribution of malicious infrastructure. When a threat analyst needs to find every domain ever registered by a specific threat actor, or trace a phishing kit back through 18 months of DNS history, DomainTools is the tool.
That’s also why most people looking for a DomainTools alternative aren’t looking for more threat intelligence. They’re looking for something that does what DomainTools’ free tools used to do — before the company migrated most of its WHOIS data behind a paywall.
DomainScan addresses the other 90% of the market: domain owners, web developers, agencies, and MSPs who need DNS health, email authentication, blacklist monitoring, and SSL certificate management — not historical threat attribution.
What Each Platform Does
DomainTools
DomainTools’ core product is historical and relational domain intelligence:
- WHOIS history — every WHOIS record ever recorded for a domain, going back years
- Reverse WHOIS — find all domains ever registered to an email, name, phone, or org
- Passive DNS — historical DNS resolution data (who did domain X resolve to on date Y)
- Domain risk score — predictive scoring of domain maliciousness
- Threat intel feeds — IOC enrichment, threat-actor attribution, APT correlation
- API — programmatic access to all data sets (enterprise pricing)
- Integrations — SIEM/SOAR platforms (Splunk, Sentinel, Elastic, Palo Alto XSOAR)
Current traffic: 4.6K/mo organic (92.8% on homepage — almost entirely branded). This is not a tools site. It’s an enterprise product people buy through sales, not discover through search.
DomainScan
DomainScan is a domain intelligence platform for domain owners, developers, and agencies:
- DNS lookup — all record types, propagation check, DNS health scoring
- Email authentication — SPF, DKIM, DMARC validation + alignment + scoring
- Blacklist check — 50+ DNSBLs for domain and outbound IP
- SSL checker — certificate validity, chain, expiry, cipher analysis
- Domain health / Trust Score — composite score across DNS, email, security
- Prism AI — plain-English diagnosis + exact fix for every result
- Monitoring — blacklist alerts, DNS change detection, SSL expiry, email auth drift
- White-label reports — client-branded PDF/HTML for agency workflows
- API + MCP — all tools programmatically accessible
Feature Comparison
| Feature | DomainScan | DomainTools |
|---|---|---|
| Current WHOIS / RDAP lookup | ✅ | ✅ (paywalled history) |
| Historical WHOIS records | ❌ | ✅ (core product) |
| Passive DNS history | ❌ | ✅ (core product) |
| Reverse WHOIS | ❌ | ✅ |
| DNS lookup (current) | ✅ | ✅ |
| SPF / DKIM / DMARC check | ✅ | Limited |
| Blacklist check | ✅ 50+ lists | ✅ Risk score (different) |
| SSL certificate check | ✅ | ❌ |
| Domain health score | ✅ | ✅ Risk score (threat-focused) |
| AI remediation (Prism) | ✅ | ❌ |
| MCP server | ✅ | ❌ |
| Monitoring / alerts | ✅ Included | ❌ |
| White-label reports | ✅ | ❌ |
| Threat actor attribution | ❌ | ✅ |
| SIEM/SOAR integration | ❌ | ✅ |
| Price | $9/mo | $99/mo+ (sales) |
Where DomainTools Wins — And Why
DomainTools exists in a different tier of the market entirely. If you’re doing the following, DomainTools is the right tool and no reasonable alternative exists:
Incident response. A phishing domain appears in your threat intel feed. You need to know: when was it registered, what other domains share the registrant email, what IPs has it resolved to over time, and what other infrastructure clusters it. DomainTools answers all of this in seconds. No other tool has this depth of historical data.
Threat actor attribution. Mapping a new domain to a known APT group via infrastructure overlaps (shared registrar, IP range, SSL cert, nameserver patterns) requires historical data going back years. DomainTools’ passive DNS and WHOIS history make this possible.
Proactive brand protection. Finding look-alike domains as they’re registered, before a phishing campaign launches, requires monitoring new domain registrations with fuzzy matching against your brand. DomainTools’ continuous monitoring does this at scale.
Enterprise integrations. If your security stack includes Splunk SOAR, Microsoft Sentinel, or Palo Alto XSOAR, DomainTools has native integrations. DomainScan does not.
Where DomainScan Wins
Pricing. DomainTools starts at $99/mo for basic API access with limited queries — and most users need the Enterprise tier for meaningful query volume. DomainScan Pro is $9/mo. For an agency managing 10 client domains who needs blacklist monitoring, email authentication alerts, and SSL expiry warnings, DomainScan is the right tool at a fraction of the price.
The tools agencies actually use daily. Agencies don’t do threat intelligence. They do: “is my client’s domain on a blacklist?”, “why is email going to spam?”, “why did the SSL certificate expire without warning?”, “can I show clients a branded health report?” DomainScan is built for these workflows. DomainTools is not.
AI remediation. DomainTools tells you that a domain has a risk score of 82 and shares infrastructure with a known phishing cluster. DomainScan’s Prism AI tells you that your client’s DMARC policy is p=none with no rua reporting address, meaning you’re blind to spoofing and Google’s 2024 bulk sender requirements aren’t met — and then writes the exact DNS record to add. For operational users, Prism’s output is immediately actionable in a way historical threat data is not.
MCP integration. DomainScan’s MCP endpoint means your AI coding assistant (Claude, Cursor) can run domain checks as part of any workflow. “Check all 12 client domains for blacklist status and draft status emails” becomes a single prompt. DomainTools has no MCP support.
Free tools with no friction. DomainTools has aggressively paywalled its historically free WHOIS tools. Most lookups that used to be free now require an account and trial registration. DomainScan’s 50+ tools require no account for basic lookups — you check, you get results.
Who Should Use What
DomainTools is the right tool for:
- Enterprise security teams and SOC analysts
- Threat intelligence researchers
- Incident response teams
- Organizations that need WHOIS history, passive DNS, or threat actor mapping
- Budget: $100-500+/mo is reasonable for the use case
DomainScan is the right tool for:
- Web agencies and MSPs managing client domains
- Developers maintaining production infrastructure
- Domain owners who want monitoring and alerts
- Email marketers diagnosing deliverability issues
- Anyone looking for domain security tools that explain results in plain English
- Budget: $9/mo to $79/mo for monitoring + reports
These two products serve fundamentally different markets. If you Googled “DomainTools alternative” because you got a quote and it was unaffordable, or because the free tools you used to use are now paywalled, DomainScan covers all the operational use cases that made DomainTools’ free tier useful — with monitoring and AI remediation on top.