Passive DNS

Spamhaus Passive DNS (Deteqtive) is a passive DNS investigation platform that provides historical and near-real-time DNS record visibility and domain↔IP↔nameserver pivots to support attribution, timeline reconstruction, and investigative workflows.

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MarketsThreat Intelligence Platforms

Published Sep 7, 2026

01Common complaints

- If an organization requires predictable self-serve pricing and rapid onboarding, a sales-led pricing model can slow evaluation and procurement. - If the primary requirement is protective DNS enforcement on endpoints rather than investigative, historical DNS analysis. - If procurement requires extensive third-party, peer-reviewed product ratings and reviews specific to Passive DNS/Deteqtive; such review coverage was not evident in the material accessed for this research pass. - If the primary need is broad non-DNS artifacts (certificates, web crawling evidence, tracker analytics) and it is not clear those artifacts are included. - Pricing transparency - Pricing for Passive DNS is sales-led and not publicly listed, which may complicate procurement for smaller teams. - Limited accessible third-party reviews for Deteqtive specifically - Buyers should rely on technical trials, reference calls, and coverage validation during evaluation. - Maturity uncertainty for an intelligence layer - The Passive DNS Intelligence capability is described by the vendor as early access; buyers should validate feature completeness and roadmap alignment with their needs. - Ecosystem and perception risk - Spamhaus provides multiple offerings (blocklists, datasets, feeds) and community perceptions of blocklisting practices can influence buyer sentiment even if unrelated to Passive DNS dataset quality.

Deal disqualifiers: what makes a poor fit

Organizations primarily seeking endpoint protective DNS enforcement should evaluate protective DNS vendors instead
Small teams that require transparent, self-serve pricing and minimal procurement overhead may find a sales-led pricing approach burdensome
Buyers that require a single platform with a broad internet inventory (DNS, WHOIS/RDAP, certificates, web crawling) should validate whether Deteqtive covers those needs

02Why they buy

- Foundation in Spamhaus DNS/IP/domain reputation datasets - Deteqtive is presented as a passive DNS investigation offering built on Spamhaus’ broader threat intelligence. - Multiple consumption methods (API and feeds) - API access via HTTPS with bearer-token authentication is documented for programmatic queries. - Feed-based delivery via streaming (Kafka) is referenced for high-scale consumers. - Direction toward an intelligence layer for passive DNS - Spamhaus is positioning Passive DNS Intelligence as an intelligence layer that augments raw passive DNS records to support investigative workflows; buyers should validate feature maturity and roadmap during evaluation. - Competitor advantages (balanced) - DomainTools provides an integrated investigation workflow and ecosystem around domain intelligence. - SecurityTrails focuses on comprehensive internet inventory and historical records which can be advantageous for attack-surface use cases.

03Field reports

Important limitation: large enterprise review platforms did not surface product-specific review pages for Spamhaus Passive DNS / Deteqtive in the material accessed. This section therefore relies on community discussions about Spamhaus generally (blocklists) and limited vendor-published case material. - Direct quotes (community / social) - Community sentiment includes both recognition of Spamhaus’ influence in blocklisting and criticism regarding listing/delisting processes and transparency. Example community statements reference Spamhaus’ influence on blocklist operations and frustration with perceived lack of transparency when a domain is listed. - Direct quotes (official case study) - A vendor-published case study includes a positive endorsement describing Spamhaus’ Passive DNS as useful for analyzing registry zones quickly. - Common criticisms and complaints (from accessible sources) - Community complaints primarily relate to Spamhaus’ listing and delisting procedures and perceived false positives in blocklists; these complaints concern reputation feeds and do not specifically address Passive DNS data quality in most publicly available threads. - Frequent themes in community discussions: - Limited explanation or perceived opacity when domains/IPs are listed - Perceived false positives and slow or unclear delisting processes - Why customers chose this product over alternatives - Likely selection drivers include Spamhaus’ reputation in DNS reputation and abuse intelligence and interest in DNS-centric investigative workflows via API and feeds. - The fTLD registry case study suggests value for registry zone analysis, though the case study is vendor-published and lacks detailed methodology or quantified impact in the excerpt reviewed. - Why some customers left for competitors (churn reasons) - No direct public evidence of customers switching from Spamhaus Passive DNS to specific competitors was found in the material reviewed for this pass. - Specific outcomes customers achieved (with metrics when available) - Vendor-published research using Passive DNS reported distributions indicating many newly observed domains were active for only short durations in the studied sample; these statistics provide context but are not vendor-verified ROI metrics for customers. - Deal-breakers and reasons customers did not purchase - Potential procurement frictions include sales-led pricing models with limited public pricing visibility and integration complexity for feed-based consumption. Organizations that require broader internet inventory (WHOIS, certificates, web crawling evidence) in a single platform may evaluate alternatives.

Case Studies

- fTLD Registry case study (vendor-published) - Claim: Passive DNS enabled a registry to analyze its zones quickly and simply; the case study includes a positive endorsement. - Critical evaluation: The case study is vendor-published and does not disclose detailed methodology, baseline comparisons, or quantified impact metrics (e.g., time saved, abuse prevented, cost reduction) in the excerpt reviewed. - Research-support blog (vendor-published) - Claim: Spamhaus published an analysis using Passive DNS to study newly registered domains used for abuse, reporting distributions of domain lifetimes. - Critical evaluation: The statistics provide useful context for defenders but do not constitute an independent validation that the Spamhaus Passive DNS approach outperforms other datasets; the analysis is informative but vendor-published.

04Best fit

Company sizes

Mid-market to enterprise security teams and internet infrastructure organizations.
Plausible ICP segments:
- Organizations with dedicated threat intelligence or incident response capability
- ISPs, hosting providers, registries, and registrars (aligns with registry case study)

Industries and verticals where adoption is strongest

Internet infrastructure providers, cybersecurity vendors, financial services fraud teams, and brands at risk of impersonation or phishing.

Roles and personas

Decision makers: Director/VP Security Operations, Head of Threat Intelligence, Chief Information Security Officer (CISO)
End users: Threat intelligence analysts, incident responders, fraud analysts, brand protection specialists

Pain points the product addresses

Identifying infrastructure reuse (shared domains, IPs, and nameservers)
Investigating newly observed or suspicious domains
Building timelines of DNS changes to support attribution and response

Qualification criteria: what makes a good fit

Organizations that regularly conduct domain/IP investigation workflows and can operationalize outputs (case management, SIEM/SOAR enrichment)
Need for historical DNS evidence as part of incident response or threat investigations

05The pitch

What the product does (core functionality in objective terms)

- Spamhaus offers Passive DNS data products and an investigation experience branded Deteqtive, presented as a passive DNS investigation platform built on Spamhaus’s DNS, IP, and domain intelligence. - The product provides historical and near-real-time DNS record visibility, showing domain ↔ IP ↔ nameserver relationships over time for investigations such as attribution, infrastructure pivots, and identifying suspicious domain behavior. - Spamhaus describes an offering called Passive DNS Intelligence (Deteqtive) that extends passive DNS datasets toward an intelligence layer intended to support investigation workflows.

Target market and market positioning

Target users include:
- Security operations, incident response, and threat intelligence teams
- Fraud, brand protection, and abuse teams
- Registries/registrars and infrastructure providers (case-study driven)
The product is positioned toward DNS intelligence use cases for investigations rather than protective DNS filtering; Spamhaus also offers other DNS-layer feeds and products.

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