Spamhaus
Spamhaus is a non-profit security organization that maintains real-time threat intelligence datasets on spam, malware, botnets, and other abusive internet activity, used by ISPs, enterprises, and security vendors to block malicious traffic. It operates and licenses DNS-based blocklists and related data feeds that integrate into email, DNS, and network security systems. Revenue is generated primarily through commercial data licensing and related security services while core datasets remain freely available for non-commercial use.
- Security Operations (SIEM/SOAR)
- Cybersecurity Services
- Revenue
- $12.0M
- Employees
- 60
- Founded
- 1998
- Headquarters
- Switzerland
What 6 Arbolus experts think of Spamhaus
NPS scores are tightly clustered with all ratings at 7 or 8, indicating users have a moderately positive experience across both new () and established (>1 year) implementations. Renewal intent is mostly not specified, but the only explicit entry is a non-renewal from a high-spend, long-term user. Stickiness is high, with 67% of responses indicating usage above one year and broad satisfaction persists across roles and industries.Overall Customer Sentiment: Positive
Who reviewed Spamhaus
- C-Suite 50% (3)
- Director 33% (2)
- Manager 17% (1)
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Sentiment
0 Net Promoter Score, from 6 scored reviews- Promoters 0
- Passives 6
- Detractors 0
Written answers and themes publish with the full report.
Renewal intent
Plan to renew 0%Plan to renew, by seniority
- 0% 1 answer
- 7/10 Average score from customers not renewing
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