# IPQS IP Address Block List vs Sec1 ZeroDefender: side-by-side comparison (2026)

[IPQS IP Address Block List](https://cybersectools.com/tools/ipqs-ip-address-block-list) is a commercial [threat intel feeds](https://cybersectools.com/categories/threat-intel-feeds) solution by [IPQualityScore](https://cybersectools.com/companies/ipqualityscore). [Sec1 ZeroDefender](https://cybersectools.com/tools/sec1-zerodefender) is a commercial [threat intel feeds](https://cybersectools.com/categories/threat-intel-feeds) solution by [Sec1](https://cybersectools.com/companies/sec1). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | IPQS IP Address Block List | Sec1 ZeroDefender |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Threat Intel Feeds | Threat Intel Feeds |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | IPQualityScore | Sec1 |
| Headquarters | – | – |

### Use cases and capabilities

| | IPQS IP Address Block List | Sec1 ZeroDefender |
|---|---|---|
| IP Address | Yes | – |
| Fraud Detection | Yes | – |
| Bot Protection | Yes | – |
| Proxy | Yes | – |
| Botnet | Yes | – |
| IP Lookup | Yes | – |
| Cyber Threat Intelligence | Yes | Yes |
| Alerting | – | Yes |
| Zero Day | – | Yes |

### Core features

**IPQS IP Address Block List**

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

**Sec1 ZeroDefender**

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

### Integrations

**IPQS IP Address Block List**

No integrations listed.

**Sec1 ZeroDefender**

7 integrations listed. Sign in on the page to see them.

## IPQS IP Address Block List vs Sec1 ZeroDefender FAQ

Common questions when comparing IPQS IP Address Block List vs Sec1 ZeroDefender for threat intel feeds.

### What is the difference between IPQS IP Address Block List and Sec1 ZeroDefender?

**IPQS IP Address Block List**: IP address blocklist service for identifying and blocking fraudulent IPs. Built by IPQualityScore.

**Sec1 ZeroDefender**: Real-time zero-day vulnerability detection and alerting platform. Built by Sec1.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes IPQS IP Address Block List and Sec1 ZeroDefender?

**IPQS IP Address Block List** is made by IPQualityScore. **Sec1 ZeroDefender** is made by Sec1. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is IPQS IP Address Block List a good alternative to Sec1 ZeroDefender?

Often, yes. IPQS IP Address Block List and Sec1 ZeroDefender are both Threat Intel Feeds products, and both cover Cyber Threat Intelligence. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [IPQS IP Address Block List vs IPQS IP Address Abuse Feed](https://cybersectools.com/compare/ipqs-ip-address-abuse-feed-vs-ipqs-ip-address-block-list)
- [IPQS IP Address Block List vs MaxMind GeoIP Insights](https://cybersectools.com/compare/ipqs-ip-address-block-list-vs-maxmind-geoip-insights)
- [IPQS IP Address Block List vs IP2Location IP2Proxy Proxy Detection Database](https://cybersectools.com/compare/ip2location-ip2proxy-proxy-detection-database-vs-ipqs-ip-address-block-list)
- [Sec1 ZeroDefender vs IPQS IP Address Abuse Feed](https://cybersectools.com/compare/ipqs-ip-address-abuse-feed-vs-sec1-zerodefender)
- [Sec1 ZeroDefender vs MaxMind GeoIP Insights](https://cybersectools.com/compare/maxmind-geoip-insights-vs-sec1-zerodefender)
- [Sec1 ZeroDefender vs IP2Location IP2Proxy Proxy Detection Database](https://cybersectools.com/compare/ip2location-ip2proxy-proxy-detection-database-vs-sec1-zerodefender)

## Alternatives to each

- [See all IPQS IP Address Block List alternatives](https://cybersectools.com/alternatives/ipqs-ip-address-block-list)
- [See all Sec1 ZeroDefender alternatives](https://cybersectools.com/alternatives/sec1-zerodefender)

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Source: https://cybersectools.com/compare/ipqs-ip-address-block-list-vs-sec1-zerodefender

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/ipqs-ip-address-block-list.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on IPQS IP Address Block List and Sec1 ZeroDefender: 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