# Cert Spotter vs DDactic Attack Surface Discovery: side-by-side comparison (2026)

[Cert Spotter](https://cybersectools.com/tools/cert-spotter) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [DDactic](https://cybersectools.com/companies/ddactic). 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

| | Cert Spotter | DDactic Attack Surface Discovery |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | External Attack Surface Management | External Attack Surface Management |
| Verified | No | No |
| Deployment type | Hybrid | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 1,132 | – |
| Last commit | Jan 2026 | – |
| Company | – | DDactic |
| Headquarters | – | – |

### Use cases and capabilities

| | Cert Spotter | DDactic Attack Surface Discovery |
|---|---|---|
| TLS | Yes | – |
| SSL | Yes | Yes |
| Alerting | Yes | – |
| Subdomain Enumeration | – | Yes |
| Vulnerability | – | Yes |
| DDoS | – | Yes |
| DNS Security | – | Yes |
| Network Scanning | – | Yes |
| Security Scanning | – | Yes |
| Port Scanning | – | Yes |
| Data Breach | – | Yes |
| Reconnaissance | – | Yes |

### Core features

**Cert Spotter**

No features listed.

**DDactic Attack Surface Discovery**

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

### Integrations

**Cert Spotter**

No integrations listed.

**DDactic Attack Surface Discovery**

12 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.

- [Cert Spotter](https://cybersectools.com/tools/cert-spotter) fits if you need both cloud and on-premises options, you need a free product and you want an open-source product.
- [DDactic Attack Surface Discovery](https://cybersectools.com/tools/ddactic-attack-surface-discovery) fits if you want a cloud product.

## Cert Spotter vs DDactic Attack Surface Discovery FAQ

Common questions when comparing Cert Spotter vs DDactic Attack Surface Discovery for external attack surface management.

### What is the difference between Cert Spotter and DDactic Attack Surface Discovery?

**Cert Spotter**: A Certificate Transparency log monitor that alerts users when SSL/TLS certificates are issued for their domains, helping detect unauthorized certificate issuance and potential security threats.

**DDactic Attack Surface Discovery**: Scans domains to discover attack surface, vulnerabilities, and generate hardening. Built by DDactic.

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

### Who makes Cert Spotter and DDactic Attack Surface Discovery?

**Cert Spotter** is open-source with 1,132 GitHub stars. **DDactic Attack Surface Discovery** is made by DDactic founded in 2026-01-01T00:00:00.000Z. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Cert Spotter a good alternative to DDactic Attack Surface Discovery?

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

## Related comparisons

- [Cert Spotter vs SurfaceDiff](https://cybersectools.com/compare/cert-spotter-vs-surfacediff)
- [Cert Spotter vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-cert-spotter)
- [Cert Spotter vs MGM Security Partners recon me](https://cybersectools.com/compare/cert-spotter-vs-mgm-security-partners-recon-me)
- [DDactic Attack Surface Discovery vs SurfaceDiff](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-surfacediff)
- [DDactic Attack Surface Discovery vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-ddactic-attack-surface-discovery)
- [DDactic Attack Surface Discovery vs MGM Security Partners recon me](https://cybersectools.com/compare/ddactic-attack-surface-discovery-vs-mgm-security-partners-recon-me)

## Alternatives to each

- [See all Cert Spotter alternatives](https://cybersectools.com/alternatives/cert-spotter)
- [See all DDactic Attack Surface Discovery alternatives](https://cybersectools.com/alternatives/ddactic-attack-surface-discovery)

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Source: https://cybersectools.com/compare/cert-spotter-vs-ddactic-attack-surface-discovery

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

More on Cert Spotter and DDactic Attack Surface Discovery: 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