# altdns vs Attaxion: side-by-side comparison (2026)

[altdns](https://cybersectools.com/tools/altdns) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. [Attaxion](https://cybersectools.com/tools/attaxion) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Attaxion](https://cybersectools.com/companies/attaxion). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions) picks Palo Alto Networks Cortex Xpanse, Microsoft Defender EASM, Mandiant Attack Surface Management and 4 more.

## Side-by-side comparison

| | altdns | Attaxion |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 2,439 | – |
| Last commit | Jan 2025 | – |
| Company | – | Attaxion |
| Headquarters | – | – |

### Use cases and capabilities

| | altdns | Attaxion |
|---|---|---|
| Reconnaissance | Yes | Yes |
| Attack Paths | – | Yes |
| Vulnerability Prioritization | – | Yes |
| Network Discovery | – | Yes |
| Security Scanning | – | Yes |
| Third Party Security | – | Yes |
| Visibility | – | Yes |
| Vulnerability | – | Yes |
| IOC | – | Yes |
| Inventory | – | Yes |

### Core features

**altdns**

No features listed.

**Attaxion**

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

### Integrations

**altdns**

No integrations listed.

**Attaxion**

5 integrations 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.

- [altdns](https://cybersectools.com/tools/altdns) fits if you need to run it on your own servers, you need a free product and you want an open-source product.
- [Attaxion](https://cybersectools.com/tools/attaxion) fits if you want a cloud product.

## altdns vs Attaxion FAQ

Common questions when comparing altdns vs Attaxion for external attack surface management.

### What is the difference between altdns and Attaxion?

**altdns**: A tool for generating permutations, alterations and mutations of subdomains and resolving them.

**Attaxion**: Agentless EASM platform for asset discovery, exposure mgmt & risk reduction. Built by Attaxion.

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

### Who makes altdns and Attaxion?

**altdns** is open-source with 2,439 GitHub stars. **Attaxion** is made by Attaxion. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is altdns a good alternative to Attaxion?

Often, yes. altdns and Attaxion are both External Attack Surface Management products, and both cover Reconnaissance. Key differences: altdns is Free while Attaxion is Commercial, altdns is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [altdns vs Vulneri ASM](https://cybersectools.com/compare/altdns-vs-vulneri-asm-attack-surface-management)
- [altdns vs CyCognito EASM Platform](https://cybersectools.com/compare/altdns-vs-cycognito-easm-platform)
- [altdns vs Cylana EASM](https://cybersectools.com/compare/altdns-vs-cylana-easm)
- [Attaxion vs Vulneri ASM](https://cybersectools.com/compare/attaxion-vs-vulneri-asm-attack-surface-management)
- [Attaxion vs CyCognito EASM Platform](https://cybersectools.com/compare/attaxion-vs-cycognito-easm-platform)
- [Attaxion vs Cylana EASM](https://cybersectools.com/compare/attaxion-vs-cylana-easm)

## Alternatives to each

- [See all altdns alternatives](https://cybersectools.com/alternatives/altdns)
- [See all Attaxion alternatives](https://cybersectools.com/alternatives/attaxion)

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Source: https://cybersectools.com/compare/altdns-vs-attaxion

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

More on altdns and Attaxion: 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