Before starting.
Any tool shown here must be used with responsibility and extreme care, the malicious use of any of them is the responsibility of the user.
Shodan is a search engine for the internet of things, it can search by IP and explore multiple devices on the network.
- Ideal for server analysis
- Offers filters for more specific searches
- Use for security audits
- Information gathering
- Physical location of the server
Hunter is a professional email search engine for workers, by entering an organization's domain it will return a list of emails associated with the domain and the source from which it was obtained.
Emailrep analyzes the entered email, provides information about the email such as its reputation and associated accounts, such as social networks among others.
Truecaller allows obtaining information from phone numbers.
- Allows social engineering attacks
- Allows SMS Gateway attacks (Only in some cases)
CLARIFICATION: I DO NOT RECOMMEND USING TRUECALLER AS A FIRST METHOD, AS TRUECALLER STORES YOUR LOCAL INFORMATION SUCH AS PHONE NUMBERS, NAMES AND ADDRESSES TO INCREASE ITS DATABASE AND THUS SHARE IT WITH THE WORLD.
By entering the person's name, it gives an information score about them on the network.
Similar platforms:

By entering a username or nickname, it will appear on which platforms that user is registered.
Similar platforms:
More related information in this LINK
Reverse image analysis.
Yandex is a powerful search engine, it allows searching by an image and will return more accurate results.
Data monitoring and analysis.
It allows monitoring a WhatsApp number or multiple of them, if the line is colored in a dark purple it means that it is online, this serves to see if two people are interacting, it requires a paid account but its demo version allows its use with limitations.
More espionage utilities HERE
Intelx is a powerful intelligence tool that allows searching by dates, emails and more, additionally it provides information about leaked emails or accounts from databases.
In addition to this, there are tools such as TheHarvester, Maltego, Osintagram, Phoneinfoga and more that can be used in your investigation, some of these are native in Kali or ParrotOS, this topic will be addressed in more depth in the entry for Osint-2.
This tool is not always reliable
