# GreyNoise Block vs iCOUNTER CTOS: side-by-side comparison (2026)

[GreyNoise Block](https://cybersectools.com/tools/greynoise-block) is a commercial [threat intel platforms](https://cybersectools.com/categories/tip) solution by [GreyNoise, Inc](https://cybersectools.com/companies/greynoise-inc). [iCOUNTER CTOS](https://cybersectools.com/tools/icounter-ctos) is a commercial [threat intel platforms](https://cybersectools.com/categories/tip) solution by [iCOUNTER](https://cybersectools.com/companies/icounter). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Threat Intelligence Platform Solutions for Business](https://cybersectools.com/shortlists/best-threat-intelligence-platforms) picks Recorded Future Threat Intelligence, Google Threat Intelligence, CrowdStrike Falcon Adversary Intelligence and 4 more.

## Side-by-side comparison

| | GreyNoise Block | iCOUNTER CTOS |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Threat Intel Platforms | Threat Intel Platforms |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | GreyNoise, Inc. | iCOUNTER |
| Headquarters | – | – |

### Use cases and capabilities

| | GreyNoise Block | iCOUNTER CTOS |
|---|---|---|
| Attack Detection | Yes | – |
| IP Lookup | Yes | – |
| Vulnerability Exploitation | Yes | – |
| Cyber Threat Intelligence | Yes | Yes |
| Third Party Security | – | Yes |
| APT | – | Yes |
| Threat Actors | – | Yes |
| IOC | – | Yes |
| Threat Analysis | – | Yes |
| Vulnerability Intelligence | – | Yes |
| Supply Chain Security | – | Yes |
| Threat Feed | – | Yes |

### Core features

**GreyNoise Block**

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

**iCOUNTER CTOS**

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

### Integrations

**GreyNoise Block**

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

**iCOUNTER CTOS**

1 integration listed. Sign in on the page to see them.

## Which one fits you

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

- [GreyNoise Block](https://cybersectools.com/tools/greynoise-block) fits if you are a small business.

## GreyNoise Block vs iCOUNTER CTOS FAQ

Common questions when comparing GreyNoise Block vs iCOUNTER CTOS for threat intel platforms.

### What is the difference between GreyNoise Block and iCOUNTER CTOS?

**GreyNoise Block**: Real-time threat intel platform detecting malicious scanning & exploitation. Built by GreyNoise, Inc.

**iCOUNTER CTOS**: Threat intel & TPRM platform detecting adversary intent before exploitation. Built by iCOUNTER.

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

### Who makes GreyNoise Block and iCOUNTER CTOS?

**GreyNoise Block** is made by GreyNoise, Inc. **iCOUNTER CTOS** is made by iCOUNTER. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is GreyNoise Block a good alternative to iCOUNTER CTOS?

Often, yes. GreyNoise Block and iCOUNTER CTOS are both Threat Intel Platforms products, and both cover Cyber Threat Intelligence. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [GreyNoise Block vs Cypho](https://cybersectools.com/compare/cypho-vs-greynoise-block)
- [GreyNoise Block vs Q-Feeds Threat Intelligence Platform](https://cybersectools.com/compare/greynoise-block-vs-q-feeds-threat-intelligence-platform)
- [GreyNoise Block vs Loginsoft VuInerability Intelligence LOVI](https://cybersectools.com/compare/greynoise-block-vs-lovi)
- [iCOUNTER CTOS vs Cypho](https://cybersectools.com/compare/cypho-vs-icounter-ctos)
- [iCOUNTER CTOS vs Q-Feeds Threat Intelligence Platform](https://cybersectools.com/compare/icounter-ctos-vs-q-feeds-threat-intelligence-platform)
- [iCOUNTER CTOS vs Loginsoft VuInerability Intelligence LOVI](https://cybersectools.com/compare/icounter-ctos-vs-lovi)

## Alternatives to each

- [See all GreyNoise Block alternatives](https://cybersectools.com/alternatives/greynoise-block)
- [See all iCOUNTER CTOS alternatives](https://cybersectools.com/alternatives/icounter-ctos)

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Source: https://cybersectools.com/compare/greynoise-block-vs-icounter-ctos

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

More on GreyNoise Block and iCOUNTER CTOS: 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