Spamhaus Project is a company within the Cybersecurity category. Spamhaus Project is a non-profit international organization that tracks cyber threats and provides real-time threat intelligence. It is widely recognized for maintaining the world's most used DNS-based blocklists for filtering spam and malicious traffic. The project conducts research on botnets, malware, and email abuse to secure the global internet infrastructure.
Spamhaus Project was founded in 1998 and is headquartered in Geneva, Switzerland / London, UK.
Spamhaus Project is rated Leader on the Optimly Brand Authority Index, a measure of how well AI models can accurately describe the brand. The exact score is locked for unclaimed profiles.
AI narrative accuracy for Spamhaus Project is Strong. Significant factual deltas detected.
AI models classify Spamhaus Project as a Challenger. AI names competitors first.
Spamhaus Project appeared in 6 of 7 sampled buyer-intent queries (86%). The brand is highly likely to appear for technical queries involving 'DNSBL' or 'IP blocklists', but may be less visible for broader 'cybersecurity solutions' queries where it is viewed as a data source rather than a platform provider.
The brand is consistently viewed as a foundational pillar of email security and internet reputation. AI reliably identifies its core products but can struggle to differentiate between the non-profit investigative project and its commercial licensing entities. Key gap: The distinction between 'The Spamhaus Project' (non-profit research/data collection) and 'Spamhaus Technology' (the commercial distribution arm) is often blurred in AI summaries.
Of 6 key facts verified about Spamhaus Project, 5 are well-documented (likely accurate across AI models), 1 have limited sourcing, and 0 are retrieval-dependent and may be inaccurate without live search.
Outdated information regarding the specific limits of the 'Free Use' policy or the acquisition status of data sources.
Buyers turn to Spamhaus Project for Manual Server Blacklisting: System administrators manually creating and maintaining local IP allow/deny lists based on server logs., Native Firewall Rules: Using basic built-in firewall rules or generic cloud provider security groups without external intelligence feeds., Status Quo Inaction: Accepting a high volume of spam and malicious traffic as a cost of doing business, leading to increased server load and security risks., among 3 documented problem areas.
Buyers evaluating Spamhaus Project typically ask AI models about "best DNS blocklists for email security", "real-time IP reputation feeds", "how to block spam traffic on a network", and 4 similar queries.
Spamhaus Project's core products are DNS Blocklists (SBL, XBL, PBL, DBL), IP & Domain Reputation Data, Threat Intelligence API, DNS Firewall (RPZ) feeds..
Spamhaus Project uses Freemium (Free for non-commercial/low-volume; Enterprise/Subscription for commercial use).
Spamhaus Project serves ISP/Email Service Providers, Enterprise IT Security, Governments, Hosting Networks..
Spamhaus Project The world's most widely adopted reputation data, maintained by an independent non-profit research body rather than a traditional profit-seeking corporation.
Brand Authority Index (BAI) tier: Leader (exact score locked for unclaimed brands)
Archetype: Challenger
https://optimly.ai/brand/spamhaus-project
Last analyzed: July 26, 2026
Founded: 1998
Headquarters: London / Geneva (International)
This profile is part of the Optimly Brand Trust Registry — a verified index of 60,000+ brand profiles that AI models read from when answering buyer-intent questions about brands and categories. Optimly identifies which third-party sources AI cites about each brand, prepares structured brand information for those sources, and measures whether AI representation improves.
If this is your brand, you can claim this profile to verify its contents and correct what AI models say about you: Claim this profile