What powers semtools.guru?
Last seen Sep 2026 · 17 technologies across 10 categories
Analytics
CMS
Databases
JavaScript libraries
Miscellaneous
PaaS
Programming languages
SEO
Web servers
WordPress plugins
AI Crawlers
Blocks 7 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- Bytespider Blocked
- CCBot Blocked
- Google-Extended Blocked
- GPTBot Blocked
Search and AI assistants
- PerplexityBot Blocked
- PetalBot Blocked
User-request fetchers
- Perplexity-User Blocked
The other 26 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt found
- ai.txt not found
AI Crawlers
7 of 33 AI crawlers blocked
Standards: llms.txt
Audience
- 53% desktop
- 47% phone
Russia
Belarus
Kazakhstan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.29 / 10 · ranked #1,134,888 of all domains
14 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- Weight: 0.2 MB · 30 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- !SEMTools
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on VK-AS (95.163.248.172)
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 7,409,502
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped All in One SEO Aug 2026
- dropped RSS Aug 2026
- dropped Web Worker Offloading Aug 2026
- dropped Google PageSpeed Jul 2026
- dropped Ivory Search Jul 2026
- dropped Performant Translations Jul 2026