Deep Web vs. Dark Web: What's the Difference?

Posted on November 19, 2025

Understanding the deep web versus the dark web is crucial for IT administrators, as it highlights the potential risks and benefits of these hidden layers of the internet.

Distinguishing between the two helps address challenges like preventing cyberattacks and managing data privacy. While the deep web primarily protects personal information, databases, and secure services, the dark web is often associated with illegal activity, but it also supports law enforcement investigations, political activism, and anonymous browsing.

Deep Web vs. Dark Web

The deep web refers to hidden web pages that are not indexed by search engines. This lack of indexing is intentional on the part of many service providers, as it helps to protect private information.

The dark web is a guarded subspace within the deep web, hosting encrypted websites that are accessible only via specific browsers. This portion of the web is commonly associated with illegal activities - see above - such as arms and drug trafficking, scams, and espionage.

There are significant threats associated with illegal activities on the dark web, especially when it comes to implicating users and exposing their information. Consequently, accessing the dark web raises safety concerns and requires significant caution.

However, the dark web is also used by individuals seeking online privacy or to bypass censorship in their home countries. Specialized browsers like Tor enable anonymous access to this part of the web.

We'll cover both the deep web and the dark web in greater detail below to help you understand what makes them such important facets of the modern internet.

Deep Web

The deep web is essentially the unindexed portion of the web that search engines cannot access.

This part of the web contains everything from password-protected sites and data not accessible via public web pages to private intranets, academic content, and more. It makes up about 99% of the entire web and is largely inaccessible to normal users.

Here is a simple rundown of the deep web's individual parts:

  • Password-protected sites (like email accounts and some social media platforms)
  • Unindexed web databases and resources
  • Servers storing data inaccessible via public web pages
  • Data broker repositories for marketing purposes
  • Company intranets and governmental websites
  • Academic content handled by universities

For more information about the deep web, check out the following video:

Dark Web

The dark web is actually considered to be a small part of the deep web. It can only be accessed through special networks like Tor or via static IPs shared privately.

As a rule, this side of the internet hides content, identities, and locations from third parties that are common throughout the "surface web" (mainstream, public websites). In Tor's case, this is facilitated by routing encrypted traffic through layers of relays around the world.

While the dark web offers anonymity and access to websites that are not inherently illegal in nature, it also hosts illicit sites for restricted materials and enables censorship-resistant browsing.

Parts of the dark web include:

  • Tor network and .onion suffix sites
  • Darknets like Freenet and I2P
  • Exit nodes connecting darknets to the regular internet
  • Illicit drug and material marketplaces

Both the deep web and the dark web resemble the surface web in structure but serve very different purposes. Understanding how these hidden layers interact with the public internet can help in building more secure, web-native applications.

How to protect your business from cybercrime on the deep and dark web

 
To protect your business from cybercrime on the deep web and dark web, you need to be able to identify threats and respond quickly. Criminals often use the dark web to trade stolen data and plan attacks, which they then carry out through websites, email, and social media.
 
To lower your risk, it helps to use several layers of protection, such as:
 
  • Dark web scans to identify leaked credentials, exposed data, and emerging threats circulating in underground forums and marketplaces.
  • Phishing protection tools to detect and block phishing attempts across email, web, and other attack vectors before they reach users.
  • Domain monitoring to identify look-alike domains and spoofed assets used in impersonation and fraud campaigns.
  • Social media monitoring to detect fake accounts, impersonation, and malicious activity targeting your brand on major platforms.
  • Brand protection software to unify detection, investigation, and takedown efforts across domains, marketplaces, and social channels.

 

When you use these tools together, your security team can spot threats sooner, limit your exposure, and act before attacks affect your customers or business.
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Frequently Asked Questions (FAQs)

The deep web is vastly larger than the dark web, accounting for approximately 90%–95% of all internet content, including password-protected sites, online banking, and private databases. By comparison, the dark web is a tiny, concealed portion of the deep web, estimated to represent just 0.01%–6% of the internet.

Studies indicate that 57–60% of active dark web sites are linked to illegal activities, while the remaining 40% reflect a diverse digital ecosystem. This space provides journalists, whistleblowers, activists, and privacy researchers with tools for secure communication and anonymous information sharing. Thanks to Tor’s encryption and onion routing, individuals in heavily censored regions can express themselves freely without fear of retaliation.

Ransomware-as-a-Service (RaaS) on the dark web lets developers sell or rent ready-to-use ransomware kits, enabling anyone to launch attacks with little technical skill. By turning cybercrime into a service with support and profit-sharing, the dark web has transformed ransomware into a rapidly growing global business.

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