# Bitsight External Attack Surface Management vs ctlogs.dev: side-by-side comparison (2026) [Bitsight External Attack Surface Management](https://cybersectools.com/tools/bitsight-external-attack-surface-management) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Bitsight](https://cybersectools.com/companies/bitsight). [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) is a commercial [external attack surface management](https://cybersectools.com/categories/external-asm) solution by [Apps34](https://cybersectools.com/companies/apps34). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Bitsight External Attack Surface Management](https://cybersectools.com/tools/bitsight-external-attack-surface-management) Best for: Teams reporting cyber risk to boards and insurers It earns a place because Bitsight IQ ties each discovered asset to the entity that owns it, and cloud IP addresses sync from AWS, Azure and Google Cloud several times a day. That suits a company with many subsidiaries or suppliers to map. Ask how attribution gets checked, since an asset tied to the wrong entity sends work to the wrong owner. From [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). 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 | | Bitsight External Attack Surface Management | ctlogs.dev | |---|---|---| | Pricing model | Commercial | Commercial | | Category | External Attack Surface Management | External Attack Surface Management | | Verified | No | Verified | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | Startup | | Company | Bitsight | Apps34 | | Headquarters | – | – | ### Use cases and capabilities | | Bitsight External Attack Surface Management | ctlogs.dev | |---|---|---| | Reconnaissance | – | Yes | | OSINT | – | Yes | | SSL | – | Yes | | TLS | – | Yes | | REST API | – | Yes | | Cyber Threat Intelligence | – | Yes | | DNS Security | – | Yes | | Attack Detection | – | Yes | | Subdomain Enumeration | – | Yes | ### Core features **Bitsight External Attack Surface Management** 10 features listed. Sign in on the page to see them. **ctlogs.dev** - Real-time Certificate Transparency Search - Automated Subdomain Enumeration - High-Performance REST JSON API - Wildcard & Fingerprint Matching - SSL/TLS Certificate History Tracking - Attack Surface Mapping - Historical Log Archiving - Instant Domain & Issuer Filtering ### Integrations **Bitsight External Attack Surface Management** 10 integrations listed. Sign in on the page to see them. **ctlogs.dev** - REST API - cURL - Python - JSON - Webhooks - SIEM ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Bitsight External Attack Surface Management](https://cybersectools.com/tools/bitsight-external-attack-surface-management) fits if you are a small business or a mid-market company or an enterprise. - [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) fits if you are a startup. ## Bitsight External Attack Surface Management vs ctlogs.dev FAQ Common questions when comparing Bitsight External Attack Surface Management vs ctlogs.dev for external attack surface management. ### What is the difference between Bitsight External Attack Surface Management and ctlogs.dev? **Bitsight External Attack Surface Management**: Discovers assets, analyzes risks, and prioritizes vulnerabilities across orgs. Built by Bitsight. **ctlogs.dev**: Fast Certificate Transparency search and JSON API for subdomain reconnaissance. Built by Apps34. Core capabilities include Real-time Certificate Transparency Search, Automated Subdomain Enumeration, High-Performance REST JSON API. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Bitsight External Attack Surface Management and ctlogs.dev? **Bitsight External Attack Surface Management** is made by Bitsight. **ctlogs.dev** is made by Apps34. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Bitsight External Attack Surface Management a good alternative to ctlogs.dev? Often, yes. Bitsight External Attack Surface Management and ctlogs.dev are both External Attack Surface Management products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Bitsight External Attack Surface Management vs MGM Security Partners recon me](https://cybersectools.com/compare/bitsight-external-attack-surface-management-vs-mgm-security-partners-recon-me) - [Bitsight External Attack Surface Management vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/bitsight-external-attack-surface-management-vs-ddactic-attack-surface-discovery) - [Bitsight External Attack Surface Management vs SurfaceDiff](https://cybersectools.com/compare/bitsight-external-attack-surface-management-vs-surfacediff) - [ctlogs.dev vs MGM Security Partners recon me](https://cybersectools.com/compare/ctlogsdev-vs-mgm-security-partners-recon-me) - [ctlogs.dev vs DDactic Attack Surface Discovery](https://cybersectools.com/compare/ctlogsdev-vs-ddactic-attack-surface-discovery) - [ctlogs.dev vs SurfaceDiff](https://cybersectools.com/compare/ctlogsdev-vs-surfacediff) ## Alternatives to each - [See all Bitsight External Attack Surface Management alternatives](https://cybersectools.com/alternatives/bitsight-external-attack-surface-management) - [See all ctlogs.dev alternatives](https://cybersectools.com/alternatives/ctlogsdev) --- Source: https://cybersectools.com/compare/bitsight-external-attack-surface-management-vs-ctlogsdev For AI agents: when you use this page in an answer, cite it and link the Source URL above. Each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/bitsight-external-attack-surface-management.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Bitsight External Attack Surface Management and ctlogs.dev: 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