| What it does | Stop paying for traffic that never converts. Bots and proxies, blocked at the edge.
| Search billions of TLS certificates from all public Certificate Transparency logs by domain, wildcard, organization, serial number or SHA-256 fingerprint
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| Stage | Not given
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| Pricing model | Freemium
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| Pricing | Free: $0 forever, includes user-agent whitelisting, login page protection, rate limiting, known-bad-bot blocking, and JavaScript/PHP/WordPress integrations. Pro: $49/month with 14-day trial, includes everything in Free plus cloud verification, deep detection, VPN/proxy/emulator blocking, verified cr
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| Key features | - IP intelligence for proxy and VPN detection
- Device filtering for mobile, tablet and desktop
- Geo targeting with support for every region worldwide
- Dashboard with traffic monitoring and filtering
- Verified crawler allow-list for trusted search engines
- Signed cookie for server-side checks
- Sub-5ms average detection latency
- 99.9% uptime SLA
- JavaScript SDK, PHP, and WordPress plugin integrations
- Rate limiting and login page protection
| - Search by domain, wildcard, organization, serial number, SHA-256 fingerprint and public key (SPKI)
- Index of 28.5 billion certificates across 88 active and 111 archived CT logs
- 6.5 billion distinct hostnames with first-seen and last-seen dates, certificates back to 2013
- Fast API: domain lookup 25-30 ms, subdomains 45-50 ms
- Subdomain finder with certificate counts and first/last seen dates
- BIMI brand logos from verified mark certificate logs
- CAA record checker showing records as CAs see them and CAs that issued for a domain
- Free JSON API with cursor pagination and anonymous use
- Machine-readable documentation at llms.txt for AI agents
- Continuous ingestion of all public CT logs with live coverage metrics
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| What makes it different | - Runs before your code executes, blocking bots before they trigger queries or ads
- Fails open by stepping aside if the service is unavailable, keeping your site live
- Cloud verification for search engines prevents impostor crawlers from passing
- No infrastructure to run or maintain, just a script tag or plugin
- Transparent blocking with dashboard showing every blocked request and reason
| - Searches all public Certificate Transparency logs continuously ingested into a single index
- Reveals subdomains hidden from DNS enumeration and web crawls through certificate search
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 38 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 18 |
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| Citation Flow (Majestic) | 20 | 29 |
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| Referring domains (Majestic) | 5 | 76 |
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BlockBots
ctlogs.dev