What is Google Vault used for? Is Vaultastic a Google vault alternative? 

Google Vault is a cloud-based archiving and eDiscovery solution for G Suite customers, designed to help businesses retain, search, and export data from services like Gmail, Google Drive, and Google Chat. It is primarily used for legal compliance, eDiscovery, and data retention purposes.

Vaultastic, on the other hand, is a robust cloud-based data archiving solution and a great alternative to Google Vault. Vaultastic offers key advantages, such as an independent archive (great for compliance), data redundancy, simplified eDiscovery across user accounts, and up to 60% cost optimization. 

While it provides similar archiving capabilities, Vaultastic is not limited to G Suite and can be used with various other platforms, including Office 365 and Zimbra. Additionally, Vaultastic includes features like tamper-proof archiving, email backup, and advanced search tools, making it a comprehensive solution for long-term data protection and compliance.