SecurityZones SURBL BV is a commercial threat intel feeds solution by SecurityZones. SSLBL - SSL Blacklist is a free threat intel feeds solution. Features, integrations, deployment and the company behind each one, side by side.
Domain reputation threat intelligence feeds for malicious domain detection
A project that detects malicious SSL connections by identifying and blacklisting SSL certificates used by botnet C&C servers and identifying JA3 fingerprints to detect and block malware botnet C&C communication.
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Based on what each listing shows: deployment, company size, price and open source.
SSLBL - SSL Blacklist fits if you are a startup and you need a free product.
Common questions when comparing SecurityZones SURBL BV vs SSLBL - SSL Blacklist for threat intel feeds.
SecurityZones SURBL BV: Domain reputation threat intelligence feeds for malicious domain detection, built by SecurityZones.
SSLBL - SSL Blacklist: A project that detects malicious SSL connections by identifying and blacklisting SSL certificates used by botnet C&C servers and identifying JA3 fingerprints to detect and block malware botnet C&C communication.
The table above shows where their features, integrations, deployment and company size fit differ.
Often, yes. SecurityZones SURBL BV and SSLBL - SSL Blacklist are both Threat Intel Feeds products, and both cover Botnet. Key differences: SecurityZones SURBL BV is Commercial while SSLBL - SSL Blacklist is Free. Use the table above to see where features, deployment and company size fit differ.
No Threat Intel Feeds shortlist yet. This is the closest one.
Updated 2026-11-01
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