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 comprehensive privacy, security, and governance platform that helps you manage compliance, mitigate risk, and build trust with your customers through automated data discovery and regulatory workflows.

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 Microsoft Teams Jira ServiceNow Adobe Experience Cloud Google Cloud AWS Azure Workday
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 navigate the complex world of global privacy regulations and data security. You can automate your compliance workflows for GDPR, CCPA, and other major frameworks while gaining full visibility into your data lifecycle. The platform allows you to map data flows, conduct impact assessments, and manage subject rights requests from a single, centralized interface.

Beyond basic compliance, you can strengthen your security posture by managing third-party risks and monitoring your digital footprint. It is designed for mid-market and enterprise organizations across all industries that handle sensitive customer data. By integrating privacy into your daily operations, you can transform compliance from a legal hurdle into a competitive advantage that builds long-term customer loyalty.

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

  • Automated Data Discovery. Find and classify your sensitive data across cloud and on-premise systems automatically to maintain an accurate inventory.
  • Consent Management. Capture and sync user consent preferences across your websites and apps to ensure you stay compliant with global regulations.
  • Privacy Impact Assessments. Launch and track automated assessments to identify and mitigate privacy risks before you start new projects or processes.
  • Subject Rights Requests. Automate the intake and fulfillment of data access or deletion requests to meet strict regulatory deadlines every time.
  • Third-Party Risk Management. Assess the security and privacy practices of your vendors to protect your organization from external data breaches.
  • Incident Management. Centralize your breach notification process and follow guided workflows to report incidents to authorities within legal timeframes.

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

  • Extensive automation capabilities for complex regulatory tasks
  • Highly customizable workflows to match your internal processes
  • Comprehensive coverage of global privacy laws and frameworks
  • Centralized dashboard provides excellent visibility across departments

Cons

  • Significant learning curve for new or non-technical users
  • Implementation can be time-consuming for large organizations
  • Pricing can become expensive as you add more modules
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