robots.txt & llms.txt across the Tranco top 1M
Data as of 2026-09-07 · robots.txt via Common Crawl CC-MAIN-2026-34 + our polite crawl · llms.txt via our polite crawl · Tranco list XN67N (2026-09-03T22:00:02.533886) · 1,000,000 panel domains 1,212,578 robots.txt fetches · 740,113 parsed · 56,498 llms.txt probes

Two public profiles · no score or winner

cambridgeaudio.com and freetaxusa.com

cambridgeaudio.com #114,454 freetaxusa.com #114,453

Measured takeaway

cambridgeaudio.com blocks model-training crawlers; freetaxusa.com has mixed rules for model-training crawlers.

cambridgeaudio.com blocks GPTBot; freetaxusa.com partly blocks GPTBot.

Measured in Botfy's 2026-09-07 publication.

At a glance

A difference appears only when both sites have comparable evidence. Unavailable or unresolved observations remain incomplete.

Evidencecambridgeaudio.com freetaxusa.com
robots.txt Served and parsed Served and parsed
Google crawl posture Open Open
Unnamed crawler fallback Allowed the wildcard (*) group is effectively open Partly Restricted they inherit the wildcard (*) group's rules
Base /llms.txt Not probed Not probed

Treatment by purpose

Only resolved blocked, allowed, or mixed states count as a policy agreement or difference. Unnamed agents still inherit each site's wildcard rules.

Declared purposecambridgeaudio.com freetaxusa.com
Model training Blocked Mixed
AI search Allowed Mixed
Live assistant fetch Mixed Mixed
Opt-out directives Blocked Mixed
Ambiguous / undocumented Not explicitly addressed Mixed

Named agents

Measured differences appear first. “Not explicitly addressed” is not the same as allowed; the site's wildcard fallback governs that crawler.

Agentcambridgeaudio.com freetaxusa.com
GPTBot OpenAI Blocked Partly blocked
ClaudeBot Anthropic Blocked Partly blocked
CCBot Common Crawl Blocked Partly blocked
Bytespider ByteDance Blocked Partly blocked
meta-externalagent Meta Blocked Partly blocked
OAI-SearchBot OpenAI Allowed Partly blocked
Claude-SearchBot Anthropic Allowed Partly blocked
PerplexityBot Perplexity Allowed Partly blocked
ChatGPT-User OpenAI Allowed Partly blocked
Claude-User Anthropic Allowed Partly blocked
Perplexity-User Perplexity Allowed Partly blocked
Amazonbot Amazon Blocked Partly blocked
15 additional tracked agents
Agentcambridgeaudio.com freetaxusa.com
Google-Extended BlockedPartly blocked
Applebot-Extended BlockedPartly blocked
FacebookBot Not explicitly addressedPartly blocked
cohere-ai Not explicitly addressedPartly blocked
Diffbot Not explicitly addressedPartly blocked
Timpibot Not explicitly addressedPartly blocked
omgili Not explicitly addressedPartly blocked
omgilibot Not explicitly addressedPartly blocked
Applebot AllowedNot explicitly addressed
YouBot Not explicitly addressedPartly blocked
Claude-Web Not explicitly addressedPartly blocked
meta-externalfetcher Not explicitly addressedPartly blocked
DuckAssistBot Not explicitly addressedPartly blocked
anthropic-ai Not explicitly addressedPartly blocked
Scrapy Not explicitly addressedPartly blocked

How each site compares with its own rank peers

The sites may belong to different rank bands. Each percentage keeps its own population and denominator; Botfy does not subtract rates from unlike cohorts.

Traitcambridgeaudio.com freetaxusa.com
Wildcard group Yes 89.6% Ranks 100,001–1,000,000 · n=680,000 Yes 89.6% Ranks 100,001–1,000,000 · n=680,000
Effectively open file Yes 26.0% Ranks 100,001–1,000,000 · n=680,000 No 26.0% Ranks 100,001–1,000,000 · n=680,000
Sitemap declared No 60.6% Ranks 100,001–1,000,000 · n=680,000 Yes 60.6% Ranks 100,001–1,000,000 · n=680,000
robots.txt served Yes 61.8% Ranks 100,001–1,000,000 · n=1,111,034 Yes 61.8% Ranks 100,001–1,000,000 · n=1,111,034
robots.txt returned 404 No 8.5% Ranks 100,001–1,000,000 · n=1,111,034 No 8.5% Ranks 100,001–1,000,000 · n=1,111,034
Over the RFC parse limit No 0.3% Ranks 100,001–1,000,000 · n=680,000 No 0.3% Ranks 100,001–1,000,000 · n=680,000
Blanket disallow No 10.8% Ranks 100,001–1,000,000 · n=680,000 No 10.8% Ranks 100,001–1,000,000 · n=680,000
How this comparison is measured

Both sites use Botfy's latest published observations. A missing fetch, unresolved agent verdict, and measured absence are different states. Peer percentages use each site's exclusive Tranco rank band and print their own denominator. Populations, sources, and limits →

Keep comparing

Each suggestion replaces one side using an editorial collection or current rank proximity. Neither means the sites have similar policies.