# Different Categories of Modules in Holehe: Complete Guide to 21 Reconnaissance Categories

> Explore Holehe's 21 reconnaissance module categories including Social Media, Payment, OSINT, and CRM. Understand the structure of this powerful email reconnaissance tool from the megadose/holehe repository.

- Repository: [Palenath/holehe](https://github.com/megadose/holehe)
- Tags: deep-dive
- Published: 2026-08-24

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**Holehe organizes its email reconnaissance capabilities into 21 distinct module categories—including Social Media, Payment, OSINT, and CRM—each implemented as a sub-package under `holehe/modules/` in the `megadose/holehe` repository.**

Holehe is an open-source intelligence (OSINT) tool designed to detect where an email address is registered online. Rather than monolithic code, the project uses a modular architecture that groups reconnaissance checks into logical categories based on the industry or service type of the target platform.

## The 21 Module Categories in Holehe

The source code defines module categories through the folder hierarchy under `holehe/modules/`. Each category contains Python files that implement checks for specific services. Below are all categories currently implemented:

- **Social Media**: Platforms like [`facebook.py`](https://github.com/megadose/holehe/blob/main/facebook.py) ([`holehe/modules/social_media/facebook.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/social_media/facebook.py))
- **Transport**: Services such as [`blablacar.py`](https://github.com/megadose/holehe/blob/main/blablacar.py) ([`holehe/modules/transport/blablacar.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/transport/blablacar.py))
- **Sport**: Fitness and sports platforms like [`bodybuilding.py`](https://github.com/megadose/holehe/blob/main/bodybuilding.py) ([`holehe/modules/sport/bodybuilding.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/sport/bodybuilding.py))
- **Software**: Enterprise and personal software including [`office365.py`](https://github.com/megadose/holehe/blob/main/office365.py) ([`holehe/modules/software/office365.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/software/office365.py))
- **Shopping**: E-commerce sites such as [`vivino.py`](https://github.com/megadose/holehe/blob/main/vivino.py) ([`holehe/modules/shopping/vivino.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/shopping/vivino.py))
- **Real Estate**: Property platforms like [`vrbo.py`](https://github.com/megadose/holehe/blob/main/vrbo.py) ([`holehe/modules/real_estate/vrbo.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/real_estate/vrbo.py))
- **Programming**: Developer services including [`github.py`](https://github.com/megadose/holehe/blob/main/github.py) ([`holehe/modules/programing/github.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/programing/github.py))
- **Productivity**: Tools like [`evernote.py`](https://github.com/megadose/holehe/blob/main/evernote.py) ([`holehe/modules/productivity/evernote.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/productivity/evernote.py))
- **Payment**: Financial services including [`venmo.py`](https://github.com/megadose/holehe/blob/main/venmo.py) ([`holehe/modules/payment/venmo.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/payment/venmo.py))
- **OSINT**: Intelligence platforms like [`rocketreach.py`](https://github.com/megadose/holehe/blob/main/rocketreach.py) ([`holehe/modules/osint/rocketreach.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/osint/rocketreach.py))
- **Music**: Streaming services such as [`spotify.py`](https://github.com/megadose/holehe/blob/main/spotify.py) ([`holehe/modules/music/spotify.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/music/spotify.py))
- **Medical**: Healthcare platforms like [`sevencups.py`](https://github.com/megadose/holehe/blob/main/sevencups.py) ([`holehe/modules/medical/sevencups.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/medical/sevencups.py))
- **Medias**: Photo and media sharing including [`flickr.py`](https://github.com/megadose/holehe/blob/main/flickr.py) ([`holehe/modules/medias/flickr.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/medias/flickr.py))
- **Mails**: Email providers such as [`google.py`](https://github.com/megadose/holehe/blob/main/google.py) ([`holehe/modules/mails/google.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/mails/google.py))
- **Learning**: Educational platforms like [`quora.py`](https://github.com/megadose/holehe/blob/main/quora.py) ([`holehe/modules/learning/quora.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/learning/quora.py))
- **Jobs**: Employment services including [`freelancer.py`](https://github.com/megadose/holehe/blob/main/freelancer.py) ([`holehe/modules/jobs/freelancer.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/jobs/freelancer.py))
- **Forum**: Community forums like [`thevapingforum.py`](https://github.com/megadose/holehe/blob/main/thevapingforum.py) ([`holehe/modules/forum/thevapingforum.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/forum/thevapingforum.py))
- **Crowdfunding**: Funding platforms including [`buymeacoffee.py`](https://github.com/megadose/holehe/blob/main/buymeacoffee.py) ([`holehe/modules/crowfunding/buymeacoffee.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/crowfunding/buymeacoffee.py))
- **CRM**: Customer relationship management tools like [`hubspot.py`](https://github.com/megadose/holehe/blob/main/hubspot.py) ([`holehe/modules/crm/hubspot.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/crm/hubspot.py))
- **Company**: Business presence platforms including [`aboutme.py`](https://github.com/megadose/holehe/blob/main/aboutme.py) ([`holehe/modules/company/aboutme.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/company/aboutme.py))
- **CMS**: Content management systems like [`wordpress.py`](https://github.com/megadose/holehe/blob/main/wordpress.py) ([`holehe/modules/cms/wordpress.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/cms/wordpress.py))

## How Module Categories Are Structured

Holehe's architecture treats each category as a Python sub-package. The [`holehe/modules/__init__.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/__init__.py) file initializes the package structure, while individual service checks reside as Python files within their respective category folders.

Every module file exposes a `module` class that implements the specific reconnaissance logic for that service. For example, [`holehe/modules/social_media/facebook.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/social_media/facebook.py) contains the Facebook-specific check logic, while [`holehe/modules/payment/venmo.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/payment/venmo.py) handles Venmo registration detection.

The central engine in [`holehe/core.py`](https://github.com/megadose/holehe/blob/main/holehe/core.py) handles module discovery and execution across all categories. This file dynamically loads available modules and routes email checks to the appropriate service implementations.

## Working with Module Categories programmatically

You can interact with specific categories directly by importing individual modules.

```python

# Example: Running a specific module category check

from holehe.core import Core
from holehe.modules.social_media.facebook import Facebook

core = Core()
result = Facebook().run(email="example@example.com")
print(result)

```

To see all available modules organized by category, use the CLI helper:

```bash

# Example: Listing all available modules

$ holehe -l

# Output shows each module prefixed with its category:

# social_media.facebook

# payment.venmo

# crm.hubspot

# transport.blablacar

# ...

```

## Shared Infrastructure Across Categories

Modules across all categories rely on shared utilities implemented in the root of the package:

- [`holehe/instruments.py`](https://github.com/megadose/holehe/blob/main/holehe/instruments.py): Contains shared HTTP utilities and response parsers used by modules in every category
- [`holehe/localuseragent.py`](https://github.com/megadose/holehe/blob/main/holehe/localuseragent.py): Manages rotating user-agent strings for requests made by category modules
- [`holehe/core.py`](https://github.com/megadose/holehe/blob/main/holehe/core.py): The central dispatcher that orchestrates checks across the 21 categories

This design ensures that adding support for a new service requires only creating a new Python file in the appropriate category folder under `holehe/modules/`, without modifying core engine code.

## Summary

- Holehe organizes reconnaissance checks into **21 module categories** ranging from Social Media to Payment systems
- Each category is a sub-package under `holehe/modules/` containing service-specific Python files
- The `module` class in each file implements the check logic for that particular service
- [`holehe/core.py`](https://github.com/megadose/holehe/blob/main/holehe/core.py) handles dynamic discovery and execution across all categories
- Adding new services involves placing Python files in existing category folders or creating new category directories

## Frequently Asked Questions

### How many module categories does Holehe have?

Holehe contains **21 module categories** as defined by the sub-package structure under `holehe/modules/`. These range from common categories like Social Media and Payment to specialized ones like Real Estate, Medical, and Crowdfunding.

### Where are Holehe modules physically stored in the repository?

Modules are stored in the `holehe/modules/` directory, with each category represented as a sub-folder (e.g., `holehe/modules/osint/`, `holehe/modules/crm/`). Individual service checks are Python files within these folders, such as [`holehe/modules/mails/google.py`](https://github.com/megadose/holehe/blob/main/holehe/modules/mails/google.py) for Gmail checks.

### Can I add a new service category to Holehe?

Yes, you can extend Holehe by creating a new folder under `holehe/modules/` for your category, then adding Python files that expose a `module` class implementing the `run()` method. The [`holehe/core.py`](https://github.com/megadose/holehe/blob/main/holehe/core.py) discovery engine automatically picks up new categories and modules at runtime without requiring registry updates.

### What is the difference between a module category and a module in Holehe?

A **module category** is the logical grouping (the folder name under `holehe/modules/`) representing an industry or service type (e.g., "social_media"). A **module** is the specific Python file within that category implementing the check for one service (e.g., [`facebook.py`](https://github.com/megadose/holehe/blob/main/facebook.py) within `social_media/`).