---
title: gpg4o Reviews
meta_title: 'gpg4o Reviews 2026: Details, Pricing, & Features | G2'
meta_description: Filter reviews by the users' company size, role or industry to find
  out how gpg4o works for a business like yours.
date_modified: '2026-06-04'
parent_category:
  name: Email Security
  url: https://www.g2.com/categories/email-security
---

# gpg4o Reviews
**Vendor:** Giegerich & Partner  
**Category:** [Email Encryption Software](https://www.g2.com/categories/email-encryption)
## About gpg4o
gpg4o is IT-Security that helps protect your sensitive mail content in Microsoft Outlook 2010/2013/2016 and is suitable for both private and enterprise usage. gpg4o is based on OpenPGP encryption by using GnuPG(GPG) and is compatible to other OpenPGP based implementations like enigmail, Symantec Encryption (former PGP Desktop) and Symantec Encryption Gateway (former PGP Universal), GPGMail, KMAil and others.






- [View gpg4o pricing details and edition comparison](https://www.g2.com/products/gpg4o/reviews?section=pricing&secure%5Bexpires_at%5D=2026-07-15+20%3A30%3A10+-0500&secure%5Bsession_id%5D=21debd61-b416-4b10-8678-feaae8a4abfa&secure%5Btoken%5D=d9ab4c8225fd8a57f29597fbc6b8ea45e96df24e28c83a6232fdbec24451dab9&format=llm_user)

## gpg4o Features
**Encryption Techniques - Email Encryption**
- Encryption Algorithms
- Transport Encryption
- End-to-End Encryption

**Authentication, Verification, and Access Controls - Email Encryption**
- Revocation Mechanisms
- Access Controls
- Digital Signatures
- Certificate Authorities

**Security Enhancements and Auditing - Email Encryption**
- Malware Scanning
- Reporting
- Audit Trails
- Data Loss Prevention (DLP)

**Integration, Compatibility, and Usability - Email Encryption**
- User-Friendly Interfaces
- APIs and SDKs
- Email Client Integration
- Automation

## Top gpg4o Alternatives
  - [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) - 4.6/5.0 (589 reviews)
  - [Paubox](https://www.g2.com/products/paubox/reviews) - 4.9/5.0 (588 reviews)
  - [Check Point Email Security](https://www.g2.com/products/check-point-email-security/reviews) - 4.6/5.0 (487 reviews)