Explore Web Crawler list and its Crawling Process

Crawler List : 12 Most Common Web Crawler in 2023

In the digital world, web crawlers play a pivotal role in indexing and retrieving information across the vast expanse of the internet. As we delve into 2023, it’s essential to navigate the dynamic ecosystem of web crawlers list.

From search engine giants to specialized bots, this curated list explores the 12 most common web crawlers that are shaping the way we access and organize online data.

What Are Web Crawler Bots?

Search engines like Google, Bing, and others use web crawler bots, sometimes known as “crawlers” or “spiders,” to browse and index the immense range of the internet. These bots are made to perform a thorough website scan, retrieve material from web pages, and follow links to find new pages. They are crucial in structuring and classifying web information, enabling search engines to deliver relevant search results to users swiftly.

Consider them as digital explorers who ceaselessly gather information to improve global user access and searchability on the internet. Web crawler bots are automated programs that scan websites, retrieve content, and build accessible databases to facilitate effective Internet searches, 

A crawl from a web crawler bot is required for search engines to offer up-to-date, relevant online sites to people searching. This process may occur automatically (depending on the crawler’s and your site’s settings) or initiated manually. Relevancy, backlinks, web hosting, and other factors all impact your pages’ SEO position. None of this matters if search engines aren’t crawling and indexing your pages. That is why ensuring that your site allows the proper crawls and removes any obstacles in their path is critical.

What is a Web Crawler List?

No one web crawler crawls for every search engine. Because each search engine has distinct strengths, developers, and marketers often compile a “crawler list.” This crawler list assists them in determining which crawlers to approve or block in their site log.

Marketers must compile a crawler list of various web crawlers and understand how they evaluate your site (unlike content scrapers, which steal content) to ensure their landing pages are properly optimized for search engines.

Most Common Web Crawlers

Let’s explore some of the most common web crawlers in 2023.

1. Googlebot.
2. Bingbot.
3. Yahoo Slurp
4. Yandex Bot.
5. Apple Bot.
6. DuckDuck Bot.
7. Baidu Spider.
8. Sogou Spider.
9. Facebook External Hit.
10. Exabot.
11. Swiftbot.
12. CCBot.
13. GoogleOther.

Most Common Web Crawlers List

Most Common Web Crawlers List

There isn’t a single crawler that handles everything for every search engine. Instead, numerous web crawlers review your web pages and scan the information for all worldwide search engines.

Let’s look at some of the most popular web crawlers available today.

i. Googlebot

Googlebot is Google’s passionate web crawler, ceaselessly searching the internet for and indexing web pages. Consider yourself a digital explorer, following links and gathering data to develop a searchable database, enabling Google to provide people worldwide with fast and accurate search results.

Googlebot continually updates its index to ensure that search results represent the most up-to-date and relevant information accessible online. It is essential in making the immense expanse of the internet accessible and organized for users.

ii. Bingbot

Bingbot is Microsoft’s ardent web crawler, combing the internet constantly to index web pages for Bings search engine. Consider it a digital detective, searching for and categorizing material so that people who search on Bing receive accurate and relevant results.

Bing bot is critical for ensuring that Bing users find the information they want promptly, making it a vital component of the search engine’s functionality.

iii. Yahoo Slurp

Yahoo Slurp functions similarly to a web detective for Yahoo’s search engine. It combs the internet, seeking information from websites to provide Yahoo users with reliable and relevant search results. It follows links and collects data, much like a diligent investigator,

to help develop a comprehensive index of web content, allowing Yahoo to answer user requests quickly with the most current and accurate information accessible on the web. Yahoo Slurp is critical in offering a seamless and productive search experience for Yahoo users worldwide.

iv. Baidu Spider

Baidu Spider is like an online explorer dedicated to China’s popular search engine, Baidu. It tirelessly scans and catalogs Chinese-language content across the web, making it accessible to users searching in their native language.

This specialized crawler helps Baidu deliver accurate and relevant search results to millions of Chinese-speaking internet users. Think of it as a diligent language expert, ensuring that people in China can easily find what they’re looking for online.

v. Yandex Bot

Yandex Bot is a specialized web crawler for Russia’s biggest search engine. It travels the Russian internet environment like an intrepid explorer, cataloging and indexing web pages. Its objective is to ensure that when Russian users search for information, Yandex returns accurate and relevant results.

Yandex Bot makes the enormous Russian internet world accessible to users by persistently scanning websites and gathering data, presenting them with the information they seek.

vi. DuckDuckGo Bot

The DuckDuckGo Bot functions as an undetectable digital privacy protector. The DuckDuckGo search engine’s automated agent works ceaselessly to retrieve search results while preserving user privacy. DuckDuckGo Bot, unlike other search engine crawlers,

does not track or keep personal information. It ensures that users can browse the internet without leaving a digital footprint. DuckDuckGo’s commitment to providing a safe and private search experience for users globally is embodied by this bot.

vii. Sogou Spider

Sogou Spider functions as a web investigator for China’s Sogou search engine. It tirelessly searches the Chinese internet, indexing pages and gathering vital data, enabling Sogou to provide its users with accurate and relevant search results.

Consider it an expert scout, constantly searching for fresh material and websites to keep the search engine’s database up to date and thorough, making it a helpful tool for users navigating China’s digital landscape.

viii. Facebook External Hit

Facebook External Hit is a specialized crawler used by Facebook to gather information from websites. It’s like a digital scout, fetching data to improve link previews and information displayed when a link is shared on the platform.

This crawler ensures that sharing a link on Facebook provides accurate and appealing information, making the sharing experience more informative and engaging for users.

ix. Exabot

Exabot is a web crawler employed by Exalead, a search engine that focuses on giving high-quality, relevant search results. It relentlessly searches the internet, indexes web pages, and collects data. Consider it as a diligent researcher digging through the vast web for helpful information.

Exabot is essential to the search engine’s functionality since it ensures that Exalead users find accurate and valuable information when they conduct searches.

x . Swiftbot

Swiftbot is a specialized web crawler that Twitter employs. It crawls the platform incessantly for tweets, profiles, and hashtags. Its purpose is to make relevant Twitter material accessible to users.

Swiftbot is critical in ensuring that trending topics, popular tweets, and user profiles are readily available via Twitter’s search feature, keeping users updated on the most recent conversations and information on the platform.

xi. CCBot

CCBot  which stands for Common Crawl Bot, is a hardworking data collector on the internet. Its purpose is to archive a large portion of the internet, making it available for research and analysis.

This crawler is not affiliated with any search engine; it is a public resource for developers, researchers, and enterprises. It collects web data systematically and openly, making it a helpful tool for various applications.

xii. Google Other

GoogleOther was launched by Google in April 2023 and functions similarly to Googlebot. They both use the same infrastructure and have the same capabilities and limits. Google Other, on the other hand, will be used internally by Google teams to crawl publicly accessible content from sites.

This new crawler aims to relieve some of the burden on Googlebot’s crawl capacity and optimize its web crawling processes. GoogleOther will be used for R&D crawls, for example, letting Googlebot focus on activities directly connected to search indexing.

How Does a Web Crawler Work?

Consider yourself a web crawler bot on a mission to explore the internet.

Here’s how you’d go about it

1. Starting Point

You start from a specific point, commonly a list of recognized web pages or URLs provided by the search engine.

2. Request and Fetch

To obtain the content of a webpage, you send a request to the web server that hosts it. The server responds by delivering the data from the webpage.

3. Parsing

The webpage is then parsed, with text, graphics, and other pertinent information extracted. You also identify and follow any links on the page, forming a network of interconnected websites.

4. Indexing

The information you collect is organized and saved in an extensive database. Search engines can swiftly extract relevant information when users type a search query.

5. Revisiting

 Web crawlers return to websites regularly to ensure up-to-date and accurate information.

Different Types of Web Crawlers

i.Traditional Web Crawlers

Search engines employ these to index web pages for search results. They use links to find and index fresh material.

ii. Focused Web Crawlers:

These specialized crawlers, also known as topical crawlers, target specific content or themes rather than indexing the whole web. They are frequently employed for data collection for a particular study subject.

iii. Incremental Web Crawlers

These crawlers are concerned with discovering and indexing fresh or updated web material. They scan previously indexed pages for updates to ensure that search engine databases are current.

Each type serves a particular purpose based on the user or Organization’s requirements.

Role of Web Crawlers

Web crawlers are search engines’ invisible champions. Crawlers assist search engines in delivering search results in milliseconds or less, even for complex queries. They constantly search the web for new websites and pages, guaranteeing that the search engine’s database is constantly growing.

Crawlers aid in evaluating the relevance and quality of online pages, allowing search engines to rank them in search results and update the search engine’s database to reflect changes made to websites or the addition of new content.

Commercial Web Crawlers List for SEO Professionals

1. Screaming Frog:

The Screaming Frog SEO Spider is a robust website analysis tool that SEO specialists often use. It scans and collects data on URLs, photos, and scripts and is more like a digital detective.

This data assists in identifying issues such as broken links, duplicate content, and missing meta descriptions. It also offers valuable information for optimizing websites, improving search engine rankings, and improving overall site performance. Screaming Frog’s user-friendly UI makes it an indispensable tool for anyone serious about SEO.

2. Majestic Web Crawler

Majestic is a prominent backlink analyzing and SEO tool. Its web crawler scours the vast online environment, painstakingly evaluating website links. Majestic investigates the links that shape the internet like a digital detective. This information is critical for determining a website’s authority and influence.

Marketers and SEO experts rely on Majestic’s insights to fine-tune their strategies and boost their online presence, making it a significant resource in the digital world.

3. Cognitive SEO

For SEO specialists, cognitiveSEO provides a powerful crawler tool. This conscientious virtual explorer investigates the structure and content of websites. It gives valuable information about on-page features, backlinks, and technological concerns.

CognitiveSEO Crawler helps find optimization opportunities by simulating search engine bots, increasing a website’s visibility and rankings in search results. It’s a must-have tool for anyone trying to fine-tune their online appearance and improve the performance of their website.

4. Oncrawl

Oncrawl is a highly effective SEO tool. It investigates websites for optimization chances like a detective. It evaluates numerous factors, such as content quality, URL structure, and technical difficulties affecting search rankings.

Oncrawl assists businesses in fine-tuning their websites for improved visibility in search engine results, resulting in increased organic traffic. It’s a vital ally for businesses improving their online presence and efficiently reaching their target audience.

5. Ahrefs Bot

Ahrefs Bot is a specialized web crawler created by Ahrefs, an all-in-one SEO solution. This bot carefully navigates the internet, analyzing and cataloging website information. Its primary focus is on backlinks, which are essential for SEO performance.

Ahrefs Bot assists marketers and website owners in understanding their link profiles, identifying new connecting opportunities, and improving their overall search engine rankings. It enables consumers to make informed decisions about their internet presence by giving vital insights.

6. Semrush Bot

Semrush Bot is an essential tool in the Semrush toolkit for marketers and SEO professionals. It emulates a web crawler to gather website data, providing insights on backlinks, keywords, and overall site performance.

This information is crucial for crafting effective SEO strategies, competitive analysis, and optimizing online presence. Semrush Bot is pivotal in helping businesses improve their visibility and rankings in search engine results, ultimately driving more organic traffic to their websites.

7. Moz’s Campaign Crawler Rogerbot

Rogerbot, Moz’s Campaign Crawler, is a specialized tool for SEO enthusiasts. It thoroughly analyzes websites, delivering vital insights to improve search engine rankings and general website performance.

Rogerbot, like a professional detective, unearths essential information about a site’s health, links, and prospective difficulties, facilitating web admins and SEO professionals to make more educated judgments about how to boost their online presence and exposure.

Moz is a fantastic resource for optimizing websites and staying ahead in the digital arena with Rogerbot.

How to Leverage Web Crawlers for Success

How to Leverage Web Crawlers for Success

Web crawlers are more than simply tools for search engines; they may also be used to help individuals and businesses succeed.

Here are some examples of how to use web crawlers.

1. Search Engine Optimisation

Web crawlers are more than simply tools for search engines; they may also be used to help individuals and businesses succeed. Here are some examples of how to use web crawlers.

2. Market Analysis

Web crawlers help gather information about competitors, industry trends, and customer sentiment.

By analyzing the data obtained, you may make informed judgments regarding your business strategy, pricing, and product development.

3. Content Creation

Web crawlers can help content writers uncover popular subjects, keywords, and trending articles. These crawlers might aid in generating content ideas that appeal to your target audience.

4. Price Control

E-commerce enterprises can use web crawlers to check competition prices and track product availability. This data might help you inform your price strategy and stay competitive.

5. Emotional Analysis

Web crawlers can collect customer feedback and sentiment about your products or services by scraping social media and review sites.

This data can assist you in identifying areas for improvement and tailoring your services to customer preferences.

6. News Collection

Using web crawlers to create a news aggregator can be a helpful service. You can establish yourself as a reputable source of information by curating and presenting relevant news to your audience by gathering news from numerous sources.

How To Block Malicious Web Crawlers?

With your crawler list, you can determine which bots to authorize and which to block. The first step is to go through your crawler list and define the user agent, full agent string, and IP address associated with each crawler. These are the primary distinguishing characteristics of each bot.

You can perform a DNS lookup or IP match to match the user agent and IP address in your site records. If they do not exactly match, you may have a malicious bot attempting to impersonate the real one. The imposter can then be blocked by modifying your robots.txt site tag permissions.

Final Remarks - Web Crawler List

Web crawler bots are essential in making the massive breadth of the internet accessible and organized in today’s digital age. Understanding how they work empowers both individuals and corporations. Businesses can increase their online visibility and reach by optimizing their websites for search engine crawlers.

Web crawlers are also helpful for market research, content production, and price monitoring. However, it is critical to approach web crawling ethically, following website owners’ terms of service and legal bounds. Responsible use ensures that everyone has a fair and equitable online experience.

Finally, web crawlers are the hardworking behind-the-scenes employees who enable us to traverse and use the limitless online information. With this understanding, we can all navigate the digital surfaces more successfully. 

FAQs - Crawler List

What is a web crawler, and how does it work?

A web crawler is an algorithm search engines use to scan and index web pages. It begins at a predetermined place, retrieves web page content, follows links, and stores data in a database, helping search engines present users with rapid and relevant search results.

What is the web crawler example?

Googlebot, which is utilized by the Google search engine, is an example of a web crawler. It constantly navigates the internet, indexing web pages to offer users accurate and relevant search results. Bingbot for Bing and Baidu Spider for China's biggest search engine, Baidu, are examples.

Differentiate between Web crawling and Web scraping.

Web crawling is a process in which a bot navigates and crawls online pages to develop a database for search engines. On the other hand, web scraping is extracting specific data from websites for purposes such as analysis or storage. Crawling is about investigating, whereas scraping is about getting specific information.

What is Web Crawler architecture?

A web crawler architecture generally consists of three major components: a scheduler, a downloader, and a storage database. The URLs to be visited are managed by the scheduler, the downloader downloads web pages, and crawled data is stored in the storage database for subsequent processing or indexing by search engines.

How are bots used in a positive way as a web crawler?

Bots, such as web crawlers, play valuable roles in various ways. They help search engines index site information, ensuring users get accurate and relevant search results. They also help with SEO optimization, market research, and content development, improving the online experience for businesses and users alike.


Zayne Z

Meet Zayne VoIP Blog's dedicated Content Researcher with 5+ Years Experience. Passionate about VoIP technology, he delivers accurate, engaging articles, keeping readers informed on industry trends with excellence.