Head to head

first-colo.net vs alfasense.net

first-colo.net is more readable to AI, 91 against 50 out of 100. Both were measured with the same audit: robots.txt policy for 48 AI agents, live requests under four crawler user agents, and a JavaScript-free read of the homepage.

first-colo.net 91/10091first-colo.net

Scanned 15 hours ago · full report

alfasense.net 50/10050alfasense.net

Scanned 15 hours ago · full report

Where the difference is by dimension

Dimensionfirst-colo.netalfasense.net
Reach
Whether AI crawlers and answer-engine fetchers are permitted to request the page at all. What h…
40 / 4039 / 40
Readability
Whether a fetcher that does not execute JavaScript receives the actual content, in markup an ex…
17 / 254 / 25
Structure
Machine-readable markup that states the page's type, entities, canonical URL, and discrete fact…
20 / 203 / 20
Attribution
Signals that let an answer engine name the author, date the content, resolve the publisher, and…
11 / 151 / 15

The measurements side by side

Measurementfirst-colo.netalfasense.net
Answer engines blocked00
Training crawlers blocked00
Refuses AI agents at the edgenono
Words of text without JavaScript1,2871
Structured datayesno
Sitemapyesno
llms.txtyesno

first-colo.net blocks no tracked AI crawler in robots.txt.

alfasense.net blocks no tracked AI crawler in robots.txt.

Compare your own site

Free, no account. To watch a competitor and get an email when their crawler policy changes, see pricing.