MailStore vs OneTrust Comparison: Reviews, Features, Pricing & Alternatives in 2026

Detailed side-by-side comparison to help you choose the right solution for your team

Updated Apr 2026 8 min read

MailStore

0.0 (0 reviews)

MailStore provides specialized email archiving software solutions for small to medium-sized businesses to manage data loss prevention, compliance requirements, and server storage optimization effectively.

Starting at $??/mo
Free Trial 30 days
VS

OneTrust

0.0 (0 reviews)

OneTrust is a dedicated trust intelligence platform providing automated solutions for privacy, security, ethics, and ESG operations to help you manage compliance and build customer trust through data transparency.

Starting at --
Free Trial 14 days

Quick Comparison

Feature MailStore OneTrust
Website mailstore.com onetrust.com
Pricing Model One_time Custom
Starting Price $??/month Custom Pricing
FREE Trial ✓ 30 days free trial ✓ 14 days free trial
Free Plan ✘ No free plan ✘ No free plan
Product Demo ✓ Request demo here ✓ Request demo here
Deployment on-premise desktop cloud mobile
Integrations Microsoft 365 Exchange Server Google Workspace Outlook MDaemon IceWarp Kerio Connect IMAP POP3 Salesforce Slack Adobe Experience Cloud Microsoft Azure Google Cloud ServiceNow Jira Workday HubSpot Zendesk
Target Users small-business mid-market mid-market enterprise
Target Industries legal finance healthcare
Customer Count 0 0
Founded Year 2006 2016
Headquarters Viersen, Germany Atlanta, USA

Overview

M

MailStore

MailStore helps you take full control of your company's email data by creating 1:1 copies of all emails in a central archive. You can secure large volumes of data permanently while meeting complex legal retention requirements and GDPR obligations. By offloading emails from your active server to the archive, you significantly reduce the workload on your IT infrastructure and eliminate the need for unreliable PST files.

You can empower your team with lightning-fast full-text searches for emails and attachments, accessible directly through Outlook or a web browser. Whether you use Microsoft 365, Google Workspace, or an on-premise Exchange server, the software integrates into your existing environment. It is specifically designed for small and medium-sized businesses looking for a reliable way to prevent data loss and simplify backup processes.

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OneTrust

OneTrust helps you manage the complex landscape of global privacy regulations and security requirements through a single, unified platform. You can automate your privacy impact assessments, map your data lifecycle, and handle consumer rights requests without manual spreadsheets. It simplifies how you demonstrate compliance with frameworks like GDPR, CCPA, and ISO 27001 by centralizing your documentation and risk workflows.

You can also extend your trust initiatives into ethics and sustainability by tracking ESG goals and managing third-party risk. The platform is designed to scale with your growth, offering modular tools that integrate into your existing tech stack. Whether you are a privacy officer or a security lead, you get the visibility needed to protect your brand reputation and meet regulatory demands efficiently.

Overview

M

MailStore Features

  • Centralized Archiving Copy all existing and future emails into a single, secure archive to prevent accidental or intentional data deletion.
  • Fast Full-Text Search Find any email or attachment in seconds using an intuitive search interface that works directly within your Outlook ribbon.
  • Legal Compliance Meet regulatory requirements like GDPR and HIPAA by maintaining tamper-proof email records with sophisticated auditing and retention policies.
  • Storage Optimization Reduce your mail server storage requirements by up to 70% using advanced de-duplication and compression technologies.
  • Self-Service Access Give your team the ability to restore their own deleted emails without ever needing to contact the IT helpdesk.
  • Flexible Deployment Choose between an on-premise installation for total data sovereignty or a managed service through a certified provider.
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OneTrust Features

  • Privacy Management. Automate your privacy impact assessments and data mapping to stay compliant with evolving global regulations like GDPR and CCPA.
  • Consent & Preference Management. Capture and sync user consent across all your digital touchpoints to ensure you respect customer choices and build trust.
  • Third-Party Risk Exchange. Assess the security posture of your vendors quickly using a massive database of pre-completed security and privacy assessments.
  • Ethics & Compliance. Manage your internal whistleblower hotlines and policy acknowledgments to foster a transparent and ethical corporate culture within your organization.
  • ESG & Sustainability. Track your carbon footprint and social impact goals with automated data collection and reporting tools for transparent ESG disclosures.
  • Data Discovery. Scan your structured and unstructured data sources automatically to identify sensitive information and ensure it is properly protected.

Pricing Comparison

M

MailStore Pricing

MailStore Server (5 Users)
$??
  • Permanent software license
  • Support for 5 user mailboxes
  • 1 year of Update Cover
  • Outlook and Web Access
  • Mobile device support
  • Full-text indexing
O

OneTrust Pricing

Pros & Cons

M

MailStore

Pros

  • Extremely fast search capabilities for large archives
  • Simple installation process with minimal configuration
  • Reliable performance even with massive data volumes
  • Significantly reduces mail server backup times
  • Excellent value for money compared to competitors

Cons

  • Interface feels slightly dated and utilitarian
  • Limited advanced reporting for administrative tasks
  • Requires Windows environment for the server installation
A

OneTrust

Pros

  • Highly customizable workflows adapt to your specific internal business processes
  • Comprehensive regulatory database keeps you updated on global law changes
  • Centralized dashboard provides a clear bird's-eye view of your risk posture
  • Strong integration capabilities with existing enterprise software and data sources

Cons

  • Significant learning curve due to the platform's vast feature set
  • Implementation can be time-consuming for large, complex global organizations
  • Pricing can become expensive as you add more functional modules
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