# SecurityZones SURBL BV vs SSLBL - SSL Blacklist: side-by-side comparison (2026)

[SecurityZones SURBL BV](https://cybersectools.com/tools/securityzones-surbl-bv) is a commercial [threat intel feeds](https://cybersectools.com/categories/threat-intel-feeds) solution by [SecurityZones](https://cybersectools.com/companies/securityzones). [SSLBL - SSL Blacklist](https://cybersectools.com/tools/sslbl-ssl-blacklist) is a free [threat intel feeds](https://cybersectools.com/categories/threat-intel-feeds) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | SecurityZones SURBL BV | SSLBL - SSL Blacklist |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Threat Intel Feeds | Threat Intel Feeds |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | SecurityZones | – |
| Headquarters | – | – |

### Use cases and capabilities

| | SecurityZones SURBL BV | SSLBL - SSL Blacklist |
|---|---|---|
| Botnet | Yes | Yes |
| URL Filtering | Yes | – |
| Threat Feed | Yes | – |
| Cyber Threat Intelligence | Yes | – |
| C2 | – | Yes |
| SSL | – | Yes |

### Core features

**SecurityZones SURBL BV**

10 features listed. Sign in on the page to see them.

**SSLBL - SSL Blacklist**

No features listed.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [SSLBL - SSL Blacklist](https://cybersectools.com/tools/sslbl-ssl-blacklist) fits if you are a startup and you need a free product.

## SecurityZones SURBL BV vs SSLBL - SSL Blacklist FAQ

Common questions when comparing SecurityZones SURBL BV vs SSLBL - SSL Blacklist for threat intel feeds.

### What is the difference between SecurityZones SURBL BV and SSLBL - SSL Blacklist?

**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.

### Is SecurityZones SURBL BV a good alternative to SSLBL - SSL Blacklist?

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.

## Related comparisons

- [SecurityZones SURBL BV vs Malware Patrol Enterprise CTI](https://cybersectools.com/compare/malware-patrol-enterprise-cti-vs-securityzones-surbl-bv)
- [SecurityZones SURBL BV vs ZeroFox Threat Intelligence Feeds](https://cybersectools.com/compare/securityzones-surbl-bv-vs-zerofox-threat-intelligence-feeds)
- [SecurityZones SURBL BV vs zvelo PhishBlocklist™](https://cybersectools.com/compare/securityzones-surbl-bv-vs-zvelo-phishblocklisttm)
- [SSLBL - SSL Blacklist vs Malware Patrol Enterprise CTI](https://cybersectools.com/compare/malware-patrol-enterprise-cti-vs-sslbl-ssl-blacklist)
- [SSLBL - SSL Blacklist vs ZeroFox Threat Intelligence Feeds](https://cybersectools.com/compare/sslbl-ssl-blacklist-vs-zerofox-threat-intelligence-feeds)
- [SSLBL - SSL Blacklist vs zvelo PhishBlocklist™](https://cybersectools.com/compare/sslbl-ssl-blacklist-vs-zvelo-phishblocklisttm)

## Alternatives to each

- [See all SecurityZones SURBL BV alternatives](https://cybersectools.com/alternatives/securityzones-surbl-bv)
- [See all SSLBL - SSL Blacklist alternatives](https://cybersectools.com/alternatives/sslbl-ssl-blacklist)

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Source: https://cybersectools.com/compare/securityzones-surbl-bv-vs-sslbl-ssl-blacklist

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More on SecurityZones SURBL BV and SSLBL - SSL Blacklist: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md