gpg4o vs Virtru Email Encryption

gpg4o is a Microsoft Outlook add-in for encrypting, decrypting, signing, and checking messages and attachments. It uses public and private keys under the OpenPGP standard, and supports encrypted HTML email, PGP/MIME, and PGP/Inline. Its key management can synchronize keys, use local or public key servers, and check the Web of Trust; central management requires Enterprise KeyServer. The product also supports terminal servers, Microsoft Policy Manager, automatic key generation, and working groups. When encryption is enabled, it protects message text and attachments, but not the subject line or recipient list. The current feature page lists Outlook 2024 or 365 Classic on Windows 11 and marks Mac OS unsupported. A limited free version is available without a time limit, and a 180-day trial is noted. The listed gpg4o plan costs €99.95 a month. After maintenance expires, users can still send and read encrypted or signed email, but they do not receive further updates.

Virtru Email Encryption is a paid email security product for protecting messages and attachments. It runs on web, Windows, macOS, iOS, and Android. Secure delivery uses links, recipient verification uses identity, messages can expire, and the listed attachment limit is 150. Outlook and Gmail integrations are available, along with administrator access controls.

Virtru was founded in 2012 and is headquartered in Washington, D.C. There is no free plan. Starter costs $119 a month, billed annually, for 5 users; Business costs $219 a month, billed annually, for 5 users; and Compliance costs $499 a month, billed annually, for 5 users. Enterprise is listed for organizations with over 50 employees, but its price is not provided.