Dark Web

Top Deep Web Monitoring Tools

Top deep web monitoring tools compared: Onioff, Thedevilseye and RansomWatch, plus a daily dark web report, and how each one tracks .onion links.

Updated 3 Min Read

Top deep web monitoring tools help security teams watch the .onion services where, the post says, threat actors communicate, share data and trade illegally. This post covers four tools: Onioff, Thedevilseye, RansomWatch and a daily dark web report. Each one finds or checks .onion links in a different way. For how the surface web, deep web and dark web differ, see our deep web vs dark web explainer.

Cybersecurity professionals rely heavily on monitoring tools to detect threats and vulnerabilities in their networks. The deep web is no exception, and a wide variety of tools are available to help professionals monitor this part of the internet.

The deep web is an ecosystem full of platforms where threat actors play an active role in various layers, such as communication, sharing, and illegal trade. Moreover, APT groups operate in multiple layers of the deep web through sharing and darknet channels.

In this post, we will discuss the “Monitoring Deep Web“ in terms of the security pros and the sector.

What is Onioff and what does it check?

Onioff is a tool that allows you to effortlessly control which .onion connections are active. Extremely useful for automation and monitoring, and it is an open-source tool.

Previously removed .onion links can be tracked with daily queries.

GitHub page: https://github.com/k4m4/onioff

onioff deep web dark web

The Devils Eye extracts the onion links and descriptions that users search on the deep web, and it makes it without using Tor.

It is possible to reach various darknet platforms by giving a keyword. Different traces belong of threat actors can be found on these platforms.

Application page: thedevilseye on GitHub

devilseye dark web monitoring tool

RansomWatch

ransomwatch.org is a once-daily crawled website of the largest ransomware sites on the dark web. It is being developed as a monitoring tool for security researchers, analysts, and journalists. It just takes a screenshot.

Thanks to the service, it is possible to have .onion links belonging to threat actors.

monitoring tool

Hunchly Daily Dark Web Report

Finding good research targets on the dark web sometimes seems like a daunting task. Hunchly shares daily dark web reports to support the community. This allows analysts to access new .onion extensions and gain new resources for their research.

Registration must be created at the Hunchly website to get a link to a spreadsheet that you can download or view online each day.

Newly discovered, crashed, or online services are shared in the daily list. The records from 2017 to the present are archived and shared for statistical data extraction.

hunchly daily crawled pages

Frequently Asked Questions.

What is Onioff used for?

Onioff is an open-source tool that lets you control which .onion connections are active. The post calls it useful for automation and monitoring, and says previously removed .onion links can be tracked with daily queries.

Can I search dark web links without using Tor?

Thedevilseye can. The post says it extracts the onion links and descriptions that users search for on the deep web without using Tor. You give it a keyword and it reaches darknet platforms.

What does RansomWatch do?

The post says ransomwatch.org is a once-daily crawl of the largest ransomware sites on the dark web, built for researchers, analysts and journalists. It only takes a screenshot of each site.

Why do threat actors use Tor?

CISA says malicious actors use Tor to mask their identity. They use it for reconnaissance, penetrating systems, exfiltrating and manipulating data, denial-of-service attacks and command and control communications.

Why watch ransomware leak sites and cybercrime forums?

ENISA based its 2025 threat landscape on monitored data leak sites and cybercriminal forums. It reports that cybercrime claims made up 81% of the activity it recorded from them.

Sources

  1. 1 CISA: Defending Against Malicious Cyber Activity Originating from Tor (AA20-183A)
  2. 2 ENISA: ENISA Threat Landscape 2025