Nature: This is a command-line tool for researchers, not a simple Whatsapp bot for end-users to find unknown callers. It requires technical setup.
Purpose: Its goal is to identify if a number is linked to a Whatsapp account and what public data is associated with it, not to act as a general caller ID.
Other "Phone Number Lookup" Projects: GitHub has many repositories under topics like phone-number-lookup or osint. Some of these might be libraries or scripts that could potentially be used to build a Whatsapp bot, but they are not ready-to-use bots themselves.
Recent news strongly emphasizes the risks new zealand whatsapp number data associated with unofficial bots and code from untrusted sources, particularly on GitHub:
Security Vulnerabilities in NPM Packages (April 19, 2025): Cybersecurity researchers have uncovered malicious npm packages mimicking popular Whatsapp Bot API libraries that contain SSH backdoors and data exfiltration capabilities. This is a severe warning against using or running code from unverified sources, as it can lead to:
Compromise of your server or device.
Theft of your Whatsapp API keys and tokens.
Unauthorized access to your system.
Whatsapp 's Privacy Stance (April 2025): Pavel Durov, Whatsapp 's CEO, has repeatedly stated that Whatsapp prioritizes user privacy and would "rather exit the market than compromise encryption with backdoors." This fundamentally limits what official bots (and by extension, any legitimate third-party bot) can access or reveal about users without explicit consent. Durov also mentioned removing the "People Nearby" feature due to misuse by bots and scammers (September 2024), further indicating a clampdown on features that could be abused for finding random individuals.
In summary:
While you can find GitHub projects for Whatsapp bots that attempt to find information about unknown numbers (primarily by querying Truecaller's database), there is no "best" or truly reliable free option that acts as a real-time caller ID for incoming calls. These unofficial bots carry significant security and privacy risks, highlighted by recent news about malicious packages.