# crt.guru vs IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks): side-by-side comparison (2026) [crt.guru](https://cybersectools.com/tools/crtguru) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Crt.guru](https://cybersectools.com/companies/crtguru). [IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)](https://cybersectools.com/tools/ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks) is a free [external attack surface management](https://cybersectools.com/categories/external-asm) solution. 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 | | crt.guru | IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) | |---|---|---| | Pricing model | Commercial | Free | | Category | External Attack Surface Management | External Attack Surface Management | | Verified | No | No | | Deployment type | Cloud | On-Premises | | Company size fit | Startup, SMB, Mid-Market, Enterprise | Mid-Market, Enterprise | | GitHub stars | – | 3,964 | | Last commit | – | Feb 2026 | | Company | Crt.guru | – | | Headquarters | – | – | ### Use cases and capabilities | | crt.guru | IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) | |---|---|---| | TLS | Yes | – | | SSL | Yes | – | | PCI DSS | Yes | – | | NIST | Yes | – | | Security Scanning | Yes | – | | Alerting | Yes | – | | Security Compliance Training | Yes | – | | Security Reporting | Yes | – | | Vulnerability | Yes | – | | REST API | Yes | – | | Network Discovery | – | Yes | | Network Scanning | – | Yes | ### Core features **crt.guru** 10 features listed. Sign in on the page to see them. **IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)** No features listed. ### Integrations **crt.guru** 4 integrations listed. Sign in on the page to see them. **IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)** No integrations listed. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [crt.guru](https://cybersectools.com/tools/crtguru) fits if you want a cloud product and you are a startup or a small business. - [IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)](https://cybersectools.com/tools/ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks) fits if you need to run it on your own servers, you need a free product and you want an open-source product. ## crt.guru vs IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) FAQ Common questions when comparing crt.guru vs IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) for external attack surface management. ### What is the difference between crt.guru and IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)? **crt.guru**: External TLS cert monitoring with expiry alerts, vuln scanning & compliance reports. Built by Crt.guru. **IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)**: A network recon framework including tools for passive and active recon. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes crt.guru and IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)? **crt.guru** is made by Crt.guru. **IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)** is open-source with 3,964 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is crt.guru a good alternative to IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks)? Often, yes. crt.guru and IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) are both External Attack Surface Management products. Key differences: crt.guru is Commercial while IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) is Free, IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) is open-source. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [crt.guru vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-crtguru) - [crt.guru vs SurfaceDiff](https://cybersectools.com/compare/crtguru-vs-surfacediff) - [crt.guru vs Driftnet Explore](https://cybersectools.com/compare/crtguru-vs-driftnet-explore) - [IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks) - [IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) vs SurfaceDiff](https://cybersectools.com/compare/ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks-vs-surfacediff) - [IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) vs Driftnet Explore](https://cybersectools.com/compare/driftnet-explore-vs-ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks) ## Alternatives to each - [See all crt.guru alternatives](https://cybersectools.com/alternatives/crtguru) - [See all IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks) alternatives](https://cybersectools.com/alternatives/ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks) --- Source: https://cybersectools.com/compare/crtguru-vs-ivre-instrument-de-veille-sur-les-reseaux-exterieurs-or-drunk-dynamic-recon-of-unknown-networks For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/crtguru.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on crt.guru and IVRE (Instrument de veille sur les réseaux extérieurs) or DRUNK (Dynamic Recon of UNKnown networks): 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