Top 10 Best Email Storage Software of 2026

Mimecast is a leading cloud-based email security and archiving platform that provides robust email storage through its Mimecast Archive solution, offering unlimited storage capacity for emails, attachments, and PST files. It features advanced search, eDiscovery, and compliance tools to manage and retrieve archived data efficiently while ensuring regulatory adherence like GDPR, HIPAA, and SEC 17a-4. Designed for enterprises, it integrates seamlessly with Microsoft 365 and Google Workspace, combining secure storage with threat protection for comprehensive email management.

Proofpoint is a leading enterprise-grade email archiving and storage solution that provides unlimited cloud-based storage for emails, attachments, and metadata to meet compliance and regulatory requirements. It features advanced search, eDiscovery, legal hold management, and integration with Proofpoint's security suite for threat detection and data loss prevention. Designed for large organizations, it ensures defensible retention policies, rapid retrieval, and scalable storage without performance degradation.

Microsoft Purview is a comprehensive data governance and compliance platform that manages email storage through retention policies, archiving, and eDiscovery capabilities within Microsoft 365 environments. It enables organizations to classify, protect, and retain email data securely while ensuring regulatory compliance. As an email storage solution, it integrates seamlessly with Exchange Online for scalable archiving and advanced search functionalities.

Google Vault is a data retention and eDiscovery solution integrated with Google Workspace, designed to archive and manage Gmail messages, Google Drive files, and Chat data for compliance and legal purposes. It enables organizations to set retention rules, place legal holds, and perform advanced searches across vast amounts of email data without storage limits. Ideal for regulated industries, it facilitates quick exports in standard formats for audits or litigation.

MailStore Server is a comprehensive on-premises email archiving solution that enables businesses to store, index, and retrieve emails from sources like Microsoft Exchange, Office 365, Gmail, and IMAP/POP3 servers. It provides powerful full-text search, eDiscovery tools, and compliance features to meet legal retention requirements. The software offers a centralized web-based archive accessible to users and administrators, ensuring efficient email management without disrupting daily workflows.

Barracuda Message Archiver is a robust email archiving solution that captures, stores, and manages email data for compliance, e-discovery, and storage optimization. It supports both on-premises appliances and cloud-based deployments, integrating seamlessly with Microsoft Exchange, Office 365, and other platforms via journaling or API. The software offers policy-based retention, rapid full-text search across petabytes of data, and tools for legal holds and PST consolidation.

Smarsh is a leading cloud-based email archiving and compliance platform tailored for regulated industries like finance and healthcare. It captures, stores, and indexes emails from various sources, ensuring long-term retention and easy retrieval for audits and e-discovery. The solution also extends to supervising communications across email, chat, social media, and voice, with advanced search and analytics tools.

Global Relay is an enterprise-grade platform specializing in compliant email archiving and storage for regulated industries like finance. It securely captures, stores, and manages emails with WORM-compliant technology, advanced search, eDiscovery, and retention policies to meet standards such as SEC 17a-4 and FINRA. The solution also supports multi-channel archiving including chats and offers supervision tools for risk monitoring.

Spanning Cloud Apps is a cloud backup and archiving solution designed for Google Workspace and Microsoft 365, focusing on protecting email data through automated, immutable backups. It enables users to search, restore, and archive emails with granular precision, supporting compliance and eDiscovery needs. The platform safeguards against data loss from deletions, ransomware, or service outages, while providing long-term storage for email retention.

Backupify is a cloud backup service designed for SaaS applications, with a strong focus on email storage for Google Workspace (Gmail) and Microsoft 365 (Outlook). It provides automated daily backups, enabling point-in-time recovery, advanced search, and export options to protect against data loss from deletions, hacks, or compliance needs. The platform ensures unlimited storage and granular restoration, making it reliable for business email archiving and recovery.