What is CriteoBot?

CriteoBot is a bot in the advertising and marketing bots category, operated by Criteo.

Bot name
CriteoBot
Operator
Criteo
Type
Bot
Respects robots.txt
Not confirmed
robots.txt user agent
CriteoBot
Signs requests (Web Bot Auth)
No

About CriteoBot

Criteo Crawler is a software that visits web pages and analyzes its content to serve relevant ads on them.

Advertising bots review landing pages, check ad placements and classify pages for brand safety and contextual targeting. Blocking ad verification bots can stop your ads or your inventory from serving, so allow the ones your ad partners use.

CriteoBot user agent

CriteoBot identifies itself with this user agent string:

  • CriteoBot/0.1 (+https://www.criteo.com/criteo-crawler/)

Anyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.

How to block CriteoBot in robots.txt

We have not confirmed whether CriteoBot follows robots.txt. Add a rule, then check your logs to see that it stopped. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.

Block CriteoBot from the whole site

User-agent: CriteoBot
Disallow: /

Block CriteoBot from some folders

User-agent: CriteoBot
Disallow: /private/
Disallow: /search

Allow CriteoBot only on some folders

User-agent: CriteoBot
Allow: /blog/
Disallow: /

Allow CriteoBot and block other crawlers

User-agent: CriteoBot
Allow: /

User-agent: *
Disallow: /

Things to know

  • Each host needs its own file. Rules on www.example.com do not apply to shop.example.com.
  • A crawler obeys only the most specific group that names it. Once you add a User-agent: CriteoBot group, CriteoBot ignores your User-agent: * rules, so repeat any that should still apply.
  • The user agent name is not case sensitive. We take CriteoBot from CriteoBot's user agent; check Criteo's own documentation if it publishes a different robots.txt name.
  • Crawlers cache robots.txt, so changes can take up to a day to apply. Disallow stops crawling but does not remove pages already collected or indexed.

Limits of robots.txt

  1. CriteoBot may not follow the rule. robots.txt is a request that nothing enforces, and we have not confirmed that CriteoBot follows it. Check your logs after adding a rule.
  2. The user agent could be fake. robots.txt matches the name a request claims. Anyone can send CriteoBot's user agent, and a scraper using it is not bound by Criteo's robots.txt policy. Only checking the source network tells a real CriteoBot from a fake one.

Treat robots.txt as a statement of your policy, and enforce it where requests arrive.

Who should care about CriteoBot

Publishers

Ad verification and contextual crawlers like CriteoBot can decide whether your pages get demand. Blocking the ones your partners use can lower fill rates.

Transfon Security for publishers

Media buyers and advertisers

CriteoBot checks pages for ad platforms. Its visits to landing pages are not users, so exclude them from conversion data.

Transfon Security for advertisers

E-commerce

Ad platforms send crawlers like CriteoBot to check product landing pages. Keep it allowed so ads are not disapproved, and out of analytics.

Transfon Security for e-commerce

SaaS and APIs

Allow CriteoBot on landing pages linked from your ads, and keep it off the app.

Transfon Security for SaaS and APIs

Block CriteoBot with Transfon Security

robots.txt is a request, not an enforcement. Transfon Security shows CriteoBot by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.

Transfon Security

Control CriteoBot on your site

  • See every CriteoBot visit and the pages it reads
  • Spot bots that fake trusted crawler names
  • Block, allow or rate limit CriteoBot with one rule
  • Works with or without robots.txt support

Frequently asked questions

What is CriteoBot?

CriteoBot is a bot in the advertising and marketing bots category, operated by Criteo. Criteo Crawler is a software that visits web pages and analyzes its content to serve relevant ads on them.

Does CriteoBot respect robots.txt?

We have not confirmed whether CriteoBot follows robots.txt. Add a robots.txt rule, then check your logs to see that it stopped, and block it by user agent if it did not.

How do I block CriteoBot?

Add "User-agent: CriteoBot" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "CriteoBot/" at your WAF. In Transfon Security that is one User Agent block rule.

Is robots.txt enough to block CriteoBot?

No. robots.txt is voluntary, so CriteoBot may not follow it, and anyone can send CriteoBot's user agent, so a fake CriteoBot ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.

Should I block CriteoBot?

Advertising bots review landing pages, check ad placements and classify pages for brand safety and contextual targeting. Blocking ad verification bots can stop your ads or your inventory from serving, so allow the ones your ad partners use.

Related bots

All advertising and marketing bots · Full bot directory

See Which Bots Visit Your Site

Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.

Stay ahead of the publishing curve

Privacy, security, monetization, and performance insights. A few emails a month, no spam.

By subscribing you agree to our privacy policy.