# altdns vs ConnectSecure Attack Surface Scanning: 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. [ConnectSecure Attack Surface Scanning](https://cybersectools.com/tools/connectsecure-attack-surface-scanning) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [ConnectSecure](https://cybersectools.com/companies/connectsecure). 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 | ConnectSecure Attack Surface Scanning | |---|---|---| | 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 | SMB, Mid-Market, Enterprise | | GitHub stars | 2,439 | – | | Last commit | Jan 2025 | – | | Company | – | ConnectSecure | | Headquarters | – | – | ### Use cases and capabilities | | altdns | ConnectSecure Attack Surface Scanning | |---|---|---| | Reconnaissance | Yes | Yes | | Port Scanning | – | Yes | | Dark Web Monitoring | – | Yes | ### Core features **altdns** No features listed. **ConnectSecure Attack Surface Scanning** 10 features listed. Sign in on the page to see them. ### Integrations **altdns** No integrations listed. **ConnectSecure Attack Surface Scanning** 21 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 are a startup, you need a free product and you want an open-source product. - [ConnectSecure Attack Surface Scanning](https://cybersectools.com/tools/connectsecure-attack-surface-scanning) fits if you want a cloud product. ## altdns vs ConnectSecure Attack Surface Scanning FAQ Common questions when comparing altdns vs ConnectSecure Attack Surface Scanning for external attack surface management. ### What is the difference between altdns and ConnectSecure Attack Surface Scanning? **altdns**: A tool for generating permutations, alterations and mutations of subdomains and resolving them. **ConnectSecure Attack Surface Scanning**: External attack surface scanning for MSPs to identify vulnerabilities. Built by ConnectSecure. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes altdns and ConnectSecure Attack Surface Scanning? **altdns** is open-source with 2,439 GitHub stars. **ConnectSecure Attack Surface Scanning** is made by ConnectSecure. 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 ConnectSecure Attack Surface Scanning? Often, yes. altdns and ConnectSecure Attack Surface Scanning are both External Attack Surface Management products, and both cover Reconnaissance. Key differences: altdns is Free while ConnectSecure Attack Surface Scanning is Commercial, altdns is open-source. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [altdns vs Aleph Search](https://cybersectools.com/compare/aleph-search-clear-vs-altdns) - [altdns vs Muscope|Risk - Attack Perimeter](https://cybersectools.com/compare/altdns-vs-muscopeorrisk-attack-perimeter) - [altdns vs GuardEon](https://cybersectools.com/compare/altdns-vs-guardeon) - [ConnectSecure Attack Surface Scanning vs Aleph Search](https://cybersectools.com/compare/aleph-search-clear-vs-connectsecure-attack-surface-scanning) - [ConnectSecure Attack Surface Scanning vs Muscope|Risk - Attack Perimeter](https://cybersectools.com/compare/connectsecure-attack-surface-scanning-vs-muscopeorrisk-attack-perimeter) - [ConnectSecure Attack Surface Scanning vs GuardEon](https://cybersectools.com/compare/connectsecure-attack-surface-scanning-vs-guardeon) ## Alternatives to each - [See all altdns alternatives](https://cybersectools.com/alternatives/altdns) - [See all ConnectSecure Attack Surface Scanning alternatives](https://cybersectools.com/alternatives/connectsecure-attack-surface-scanning) --- Source: https://cybersectools.com/compare/altdns-vs-connectsecure-attack-surface-scanning 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 ConnectSecure Attack Surface Scanning: 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