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Tech stack fingerprints for 3,285 websites.
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Websites using robots.txt blocks Claude-User — SeeTheStack
Root & Well-known Files
robots.txt blocks Claude-User
Visit robots.txt blocks Claude-User ↗
Adoption
58
sites
2% of the 3,311 websites we track
Pricing: free
Websites using robots.txt blocks Claude-User
aisdr.com
getfuzzy.ai
60fps.design
aigrow.gg
america.gov
app.com
arstechnica.com
backengine.ai
backengine.com
bloomberg.com
btpn.in
chinatradingdesk.com
chrisburnell.com
cincinnati.com
cnbc.com
cnet.com
courier-journal.com
crowdvolt.com
crucialtracks.org
curbed.com
dbushell.com
delawareonline.com
detroitnews.com
dispatch.com
doverpost.com
firstround.com
france24.com
fuzzysequence.com
grubstreet.com
heraldtribune.com
hongkongfp.com
Who added or dropped it
No switches yet. We rescan every site monthly, and any site that adds or drops robots.txt blocks Claude-User shows up here.
Often used with
Google Analytics
55%
Amazon SES
50%
Google Workspace (Gmail)
jsonline.com
korben.info
lejdj.ch
lohud.com
lubbockonline.com
msn.com
namedaemon.com
newsbank.com
newspapers.com
nikkei.com
nymag.com
nypost.com
palmbeachpost.com
paygseo.com
rgj.com
textarray.com
theconversation.com
thecut.com
thegeocommunity.com
theguardian.com
theregister.com
theverge.com
tovel.ai
usatoday.com
vulture.com
washingtoncitypaper.com
wired.com
48%
Fastly
43%
Google Tag Manager
43%
Cloudflare
40%
Twilio SendGrid
36%
core-js
34%
IAB TCF v2 CMP (unidentified)
33%
Microsoft 365 (Exchange Online)
33%
IBM NS1 Connect
31%
Mailchimp Transactional (Mandrill)
31%