QuillBot
QuillBot is blocked by 62 sites in the October 2026 survey, or 1.0% of readable files. The community reference lists its operator as Quillbot.
Who runs QuillBot?
| Fact | QuillBot reference entry |
|---|---|
| Operator | “Quillbot” |
| Purpose | “Company offers AI detection, writing tools and other services.” |
| Does QuillBot obey robots.txt? | “Unclear at this time.” |
| Frequency | “No explicit frequency provided.” |
| Cloudflare managed list for QuillBot | No |
These facts quote the stored community ai.robots.txt reference.
“Operated by QuillBot as part of their suite of AI product offerings.”
This entry’s stated use is quoted above. An owner may want search visitors and answers that link back to a page while keeping its text out of model-training datasets.
How many sites block it?
Instructions to stay out of the whole site appear in 62 files, or 1.0% of 6,171 readable files. We counted 62 with its name in a User-agent line, a 1.0% share. Another 6,109 lack a recorded Disallow: / ban.
Across Tranco’s top 1,000 ranks, there were 552 readable files. Among them, 8 files carry the name, or 1.4%, with 8 files blocking the whole site. Blocking is more common among the leading sites, at 1.4%. Farther down, 54 of 5,619 files record a block, 1.0% of that group.
| Readable files | Named by | Named share | Blocked by | Blocked share |
|---|---|---|---|---|
| QuillBot, all ranks | 62 | 1.0% | 62 | 1.0% |
| QuillBot, top 1,000 | 8 | 1.4% | 8 | 1.4% |
| QuillBot, remaining ranks | 54 | 1.0% | 54 | 1.0% |
This is a count of blocks attached to the named crawler, covering the whole site. Blanket rules for every crawler do not enter it. Of 62 blocks, 1 does not also appear in our count of files naming it. The split among files that name it is 61 with a whole-site block and 1 without one. Its name is absent from 6,109 readable files. We ignore capitalization and repeated names.
How to block or allow it
The examples include the spelling variants counted together here. Put these in robots.txt at the site root. Per the robots.txt standard, a group naming QuillBot takes precedence over User-agent: *.
Block the whole site
User-agent: QuillBot
User-agent: quillbot.com
Disallow: /Allow access
User-agent: QuillBot
User-agent: quillbot.com
Allow: /It's the 100th most-named crawler of the 171 we counted in the crawler index.
How we counted
For QuillBot, the survey covered 10,000 top Tranco sites, collected on 19 October 2026. An 8-second wait or a file over 262,144 bytes ended a read. Only available files we could read enter the percentages. Parsing includes files read again, through scripts/robots_2026_08_06.py (robots.py at app commit 07104ff). See the full survey method.
Common questions
Can a file name it and still allow it?
The 62 files naming it include 1 file without a whole-site ban.
How do the shares compare by rank?
Leading files record 1.4% with the name and 1.4% blocking it. Across all readable files, the corresponding shares are 1.0% and 1.0%.
What other entry is close in the index?
Thinkbot is named by 62 files and blocked by 63, or 1.0%. For this crawler, 62 files name it and 62 block it, a 1.0% share.