From Googlebot to GPTBot: who’s crawling your site in 2025

João Tomé
13 min readadvanced
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Overview

The article discusses the evolving landscape of web crawlers, particularly the rise of AI crawlers like GPTBot and their impact on web traffic and content indexing. It highlights significant trends in crawling activity from 2024 to 2025, emphasizing the dominance of Googlebot and the implications for website owners regarding content access and rights.

What You'll Learn

1

How to manage AI crawlers using robots.txt files

2

Why understanding the impact of AI crawlers on web traffic is crucial for content creators

3

When to implement firewall rules to block unwanted crawlers

Key Questions Answered

What are the main trends in web crawling from 2024 to 2025?
The article outlines significant trends, including a 96% increase in Googlebot crawling and the emergence of AI crawlers like GPTBot, which rose from 5% to 30% share. It highlights the shifting landscape where AI crawlers are becoming more prominent, impacting how websites manage their content.
How has the share of different crawlers changed from May 2024 to May 2025?
The share of GPTBot surged from 2.2% to 7.7%, while Bytespider dropped from 22.8% to 2.9%. Googlebot's share increased from 30% to 50%, indicating a significant reordering in the crawler landscape.
What role does robots.txt play in managing AI crawlers?
Robots.txt files are used by webmasters to inform crawlers about which parts of their site should not be accessed. The article notes that 14% of domains had directives targeting AI bots, with GPTBot being the most blocked, indicating the need for clear management strategies.
What are the implications of AI crawlers on content rights?
AI crawlers raise concerns regarding content rights and unauthorized use, as they collect data for training AI models. This has led some content creators to seek ways to limit or block AI crawler access to their sites.

Key Statistics & Figures

Percentage of global web traffic from bots
30%
This statistic highlights the significant role bots play in overall internet traffic.
Growth of Googlebot crawling
96%
This increase from May 2024 to May 2025 reflects Google's enhanced crawling activity.
Share of GPTBot in May 2025
30%
GPTBot's rise from 5% in May 2024 to 30% in May 2025 indicates its growing dominance among AI crawlers.
Decline in Bytespider share
85%
Bytespider's drop from 22.8% to 2.9% shows a significant loss in its crawling activity.

Key Actionable Insights

1
Website owners should actively manage their robots.txt files to control access for AI crawlers.
As AI crawlers like GPTBot gain prominence, having clear directives can help protect content and manage how it is indexed or used by AI models.
2
Monitoring crawler traffic can provide insights into content visibility and user engagement.
Understanding the share and behavior of different crawlers helps website owners adapt their strategies to maximize visibility and protect their content.
3
Implementing firewall rules can be an effective way to block unwanted crawlers.
As the article notes, some sites are using firewall rules to limit access from AI crawlers, which can help maintain control over content usage.

Common Pitfalls

1
Assuming that robots.txt directives will always be respected by crawlers.
Many crawlers do not adhere to robots.txt rules, especially newer AI crawlers, which can lead to unauthorized data collection despite attempts to block them.
2
Neglecting to monitor crawler traffic and its implications on content visibility.
Failing to analyze which crawlers access your site can result in missed opportunities for optimization and content protection.