Who blocks AI · #601 in the Majestic Million

robots.txt · checked 9 Nov 2026

Does trello.com block AI crawlers?

No. trello.com’s robots.txt lets all 19 AI crawlers we track crawl the site. Search engines such as Googlebot and Bingbot may crawl it.

GPTBotAllowed OAI-SearchBotAllowed ClaudeBotAllowed PerplexityBotAllowed Google-ExtendedAllowed CCBotAllowed

robots.txt: trello.com/robots.txt · 30 lines
llms.txt: none
Checked: 9 November 2026, as canaicrawl. We check again every week.

Every bot, and the line that decides

Search engines

Bot	Operator	robots.txt	Deciding line
`Googlebot`	Google	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Bingbot`	Microsoft	Allowed	line 27 · `Allow: /` under `User-agent: *`
`DuckDuckBot`	DuckDuckGo	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Applebot`	Apple	Allowed	line 27 · `Allow: /` under `User-agent: *`
`PetalBot`	Huawei	Allowed	line 27 · `Allow: /` under `User-agent: *`
`YandexBot`	Yandex	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Baiduspider`	Baidu	Allowed	line 27 · `Allow: /` under `User-agent: *`

AI search

Bot	Operator	robots.txt	Deciding line
`OAI-SearchBot`	OpenAI	Allowed	line 27 · `Allow: /` under `User-agent: *`
`PerplexityBot`	Perplexity	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Claude-SearchBot`	Anthropic	Allowed	line 27 · `Allow: /` under `User-agent: *`
`DuckAssistBot`	DuckDuckGo	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Amazonbot`	Amazon	Allowed	line 27 · `Allow: /` under `User-agent: *`
`YouBot`	You.com	Allowed	line 27 · `Allow: /` under `User-agent: *`

AI training

Bot	Operator	robots.txt	Deciding line
`GPTBot`	OpenAI	Allowed	line 27 · `Allow: /` under `User-agent: *`
`ClaudeBot`	Anthropic	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Google-Extended`	Google	Allowed	line 27 · `Allow: /` under `User-agent: *`
`CCBot`	Common Crawl	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Applebot-Extended`	Apple	Allowed	line 27 · `Allow: /` under `User-agent: *`
`GoogleOther`	Google	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Meta-ExternalAgent`	Meta	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Bytespider`	ByteDance	Allowed	line 27 · `Allow: /` under `User-agent: *`

User-triggered fetchers

Bot	Operator	robots.txt	Deciding line
`ChatGPT-User`	OpenAI	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Claude-User`	Anthropic	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Perplexity-User`	Perplexity	Allowed	line 27 · `Allow: /` under `User-agent: *`
`MistralAI-User`	Mistral	Allowed	line 27 · `Allow: /` under `User-agent: *`
`Meta-ExternalFetcher`	Meta	Allowed	line 27 · `Allow: /` under `User-agent: *`

SEO tools

Bot	Operator	robots.txt	Deciding line
`AhrefsBot`	Ahrefs	Allowed	line 27 · `Allow: /` under `User-agent: *`
`SemrushBot`	Semrush	Allowed	line 27 · `Allow: /` under `User-agent: *`
`MJ12bot`	Majestic	Allowed	line 27 · `Allow: /` under `User-agent: *`
`DotBot`	Moz	Allowed	line 27 · `Allow: /` under `User-agent: *`

View trello.com/robots.txt · 30 lines

1# Allow everything

2User-agent: *

3Disallow: /search?

4Disallow: /reset?

5Disallow: /confirm?

6Disallow: /confirmDelete?

7# Allow /recommend deny /username/recommend

8Disallow: ^/*/recommend

9Disallow: */add-card?

10Disallow: */login?

11Disallow: */signup?

12Disallow: /forgot$

13Disallow: /statement/

14Disallow: /boardinvited/

15Disallow: /invite/

16Disallow: /organizationinvited/

17Disallow: /boardInviteDeclined/

18Disallow: /organizationInviteDeclined/

19Disallow: /associate/

20Disallow: /not-supported.html

21Disallow: /static/

22Disallow: /1/

23Disallow: /c/

24Disallow: /b/

25Disallow: /u/

26Disallow: /w/

27Allow: /

29Sitemap: https://a594014.sitemaphosting7.com/4704043/sitemap_4704043.xml

What do the bots actually get?

This page reads robots.txt, which states what trello.com asks of crawlers. A firewall or CDN can still refuse a bot that robots.txt allows. The live check requests the page as each bot and shows the status it gets.

Run a live check on trello.com Test a path in the robots.txt tester

History

19 October 2026: first checked.

Questions

Does trello.com block GPTBot?

No. trello.com’s robots.txt lets GPTBot crawl the site. GPTBot is OpenAI’s crawler for training data; blocking it doesn’t affect ChatGPT search, which uses OAI-SearchBot. Checked 9 November 2026.

Does trello.com block ClaudeBot?

No. trello.com’s robots.txt lets ClaudeBot crawl the site. ClaudeBot is Anthropic’s crawler for training data. Checked 9 November 2026.

Does trello.com block Google-Extended?

No. trello.com’s robots.txt lets Google-Extended crawl the site. Google-Extended is the token that controls whether Google may use pages for Gemini training and grounding; it doesn’t affect Google Search. Checked 9 November 2026.

Does trello.com block PerplexityBot?

No. trello.com’s robots.txt lets PerplexityBot crawl the site. PerplexityBot is the crawler that indexes pages for Perplexity’s answers. Checked 9 November 2026.

Can ChatGPT search find trello.com?

Yes. trello.com’s robots.txt lets OAI-SearchBot crawl the site. OAI-SearchBot is the crawler behind ChatGPT search; blocking it keeps the site out of ChatGPT’s search answers. Checked 9 November 2026.