# Cert Spotter vs DNS Assistant: 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. [DNS Assistant](https://cybersectools.com/tools/dns-assistant) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [DNS Assistant](https://cybersectools.com/companies/dns-assistant). 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 | DNS Assistant | |---|---|---| | 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 | SMB, Mid-Market, Enterprise | | GitHub stars | 1,132 | – | | Last commit | Jan 2026 | – | | Company | – | DNS Assistant | | Headquarters | – | – | ### Use cases and capabilities | | Cert Spotter | DNS Assistant | |---|---|---| | TLS | Yes | – | | SSL | Yes | – | | Alerting | Yes | Yes | | DNS Security | – | Yes | | RBAC | – | Yes | | Multi Tenancy | – | Yes | | REST API | – | Yes | | MFA | – | Yes | | Configuration Management | – | Yes | | Misconfiguration | – | Yes | ### Core features **Cert Spotter** No features listed. **DNS Assistant** 10 features listed. Sign in on the page to see them. ### Integrations **Cert Spotter** No integrations listed. **DNS Assistant** 3 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 are a startup, you need a free product and you want an open-source product. - [DNS Assistant](https://cybersectools.com/tools/dns-assistant) fits if you want a cloud product. ## Cert Spotter vs DNS Assistant FAQ Common questions when comparing Cert Spotter vs DNS Assistant for external attack surface management. ### What is the difference between Cert Spotter and DNS Assistant? **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. **DNS Assistant**: DNS posture mgmt platform for real-time DNS & WHOIS change monitoring. Built by DNS Assistant. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Cert Spotter and DNS Assistant? **Cert Spotter** is open-source with 1,132 GitHub stars. **DNS Assistant** is made by DNS Assistant founded in 2025-01-01T00:00:00.000Z. 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 DNS Assistant? Often, yes. Cert Spotter and DNS Assistant are both External Attack Surface Management products, and both cover Alerting. Key differences: Cert Spotter is Free while DNS Assistant 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 Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-cert-spotter) - [Cert Spotter vs Guardz External Footprint](https://cybersectools.com/compare/cert-spotter-vs-guardz-external-footprint) - [Cert Spotter vs crt.guru](https://cybersectools.com/compare/cert-spotter-vs-crtguru) - [DNS Assistant vs Attack Surface Scan](https://cybersectools.com/compare/attack-surface-scan-vs-dns-assistant) - [DNS Assistant vs Guardz External Footprint](https://cybersectools.com/compare/dns-assistant-vs-guardz-external-footprint) - [DNS Assistant vs crt.guru](https://cybersectools.com/compare/crtguru-vs-dns-assistant) ## Alternatives to each - [See all Cert Spotter alternatives](https://cybersectools.com/alternatives/cert-spotter) - [See all DNS Assistant alternatives](https://cybersectools.com/alternatives/dns-assistant) --- Source: https://cybersectools.com/compare/cert-spotter-vs-dns-assistant 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 DNS Assistant: 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