Free Threat Intelligence Feeds

Free threat intelligence feeds enable the security community to increase awareness and get better visibility into emerging threats. Use these free downloads to explore facets of the alphaMountain threat intelligence suite, to test integrations with your security tooling, or for educational purposes.

For custom threat intelligence feeds, try the alphaMountain API.

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Download Free Threat Intelligence

Explore our free threat feeds below.
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Preview of host popularity .csv

Top 1M Popularity

Download the Top 1M Most Popular Sites list for free and enrich your threat-intelligence workflows with high-value, real-world internet traffic data. This free Top 1M domains download provides security teams, threat hunters, and data scientists with a reliable baseline for domain reputation analysis, content categorization, and malicious vs. benign traffic modeling. Ideal for tuning SEG/SWG policies or enriching SIEM/XDR enrichment pipelines, the dataset highlights the most frequently visited domains across the internet—enabling faster triage, better false-positive reduction, and more accurate threat scoring. Use this free Top 1M sites feed alongside alphaMountain’s real-time threat ratings, 89-category classification, and contextual intelligence to build stronger, more proactive cybersecurity defenses.

Sources: Composite ranking (Majestic, Umbrella, Domcop, Crux, Cloudflare, OSINT) + alphaMountain’s proprietary ranking algorithm
Update Frequency: Daily
File Type: .csv
Typical Size: ~20MB

Preview of community free threat intelligence feed

Community Threat 1000

Download a list of 1,000 randomly selected risky hosts (of the more than 50,000 we find every day)each with an alphaMountain risk score of 7.00 or greater—to compare or evaluate alphaMountain’s threat intelligence data in your security tooling and workflows. This free high-risk host feed provides SOC analysts and CTI teams with actionable, high-fidelity threat intelligence derived from alphaMountain’s real-time domain and IP reputation engine. Every host in the feed exhibits strong risk indicators across phishing, malware distribution, or suspicious infrastructure patterns, making it ideal for testing detection logic, validating security controls, and benchmarking threat-intelligence pipelines. Use this risky domain and IP feed alongside alphaMountain’s 89-category content classification, contextual threat factors, passive DNS, and related-host intelligence to build more accurate, scalable, and proactive defenses against emerging attacks.

Sources: alphaMountain
Update Frequency: Daily
File Type: .csv
Typical Size: ~100KB

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