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 and security platform that helps you manage data governance, regulatory compliance, and ethical risk across your entire organization to build deeper trust with your customers.

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 saas 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 Workday Oracle
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 data privacy and regulatory compliance without the manual headache. You can map your data flows, automate privacy impact assessments, and manage consent across all your digital properties from a single interface. It simplifies meeting requirements for major regulations like GDPR, CCPA, and LGPD by providing pre-built frameworks and automated workflows that scale with your business growth.

You can also strengthen your security posture by managing third-party risks and centralizing your ethics and whistleblowing programs. Whether you are a mid-sized company or a global enterprise, the platform provides the visibility you need to protect sensitive information and demonstrate accountability to auditors and customers alike. It transforms compliance from a checkbox exercise into a competitive advantage by fostering transparency.

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

  • Data Mapping Automation. Visualize how data moves through your organization and automatically maintain an up-to-date inventory of your processing activities.
  • Consent Management. Collect and track user consent across websites and mobile apps with customizable banners that meet regional legal requirements.
  • Privacy Impact Assessments. Launch automated assessments to identify and mitigate privacy risks before you start new projects or implement new technologies.
  • Third-Party Risk Management. Assess the security and privacy practices of your vendors and partners to ensure your entire supply chain remains compliant.
  • Subject Rights Requests. Automate the intake and fulfillment of data access or deletion requests from your customers to ensure timely legal compliance.
  • Incident Management. Track potential data breaches and follow guided workflows to determine notification requirements based on specific global jurisdictions.

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 library of regulatory frameworks and templates
  • Highly customizable workflows to match internal processes
  • Centralized dashboard provides great visibility across departments
  • Regular updates keep pace with changing global laws
  • Strong integration capabilities with existing IT stacks

Cons

  • Significant learning curve for new administrators
  • Initial implementation and configuration can be time-consuming
  • Pricing can become expensive as you add modules
  • Interface can feel cluttered due to many features
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