Best Mail Merge Products in 2025

Merge Multiple Outlook PST Files into Single PST file.

Key Regain Outlook PST Merger features:

Ease of Use Support for Multiple PST Files Maintains Data Integrity Compatibility

freemium $29.0 / One-off

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder. .

Key MailReach.co features:

Deliverability Improving Email Warming Meaningful Warming Content Smart Warming Algorithm

Visit website paid $19.5 / Monthly (Pro)

PST Merge Tool precisely join or merge multiple PST files in Outlook 2019, 2016, 2013, 2010.

Key SysTools PST Merge features:

User-Friendly Interface Multiple Merging Options Duplicate Removal Compatibility

Aryson Merge PST Tool allows to easily merge or combine more than two or multiple PST files into simple one PST file including all email items. It is one of the best software to merge PST files successfully.

Key Aryson Merge PST features:

User-Friendly Interface Versatile PST Merging Compatibility Preservation of Data Integrity

freemium $49.0 / One-off (1 GHz Processor, 512 MB RAM, Minimum 60 MB Space)

Merge pst files with free software that combines PST files into a single PST file.

Key PST Merger features:

Simplification Space Management Improved Searchability Enhanced Backup

With the help of SysInfo PST Merge Tool user can easily merge multiple PST files in a single PST file. The Users are able to remove the duplicate data files and exclude the deleted Outlook items from the resultant file.

Key SysInfo PST Merge features:

Ease of Use Supports Multiple Versions Preserves Data Integrity Advanced Features

freemium $59.0 / One-off (Processor: Pentium Class, Memory: Minimum 256 MB)

Download Softaken Merge PST software and combine multiple PST files into one PST.

Key Softaken Merge PST features:

Ease of Use Compatibility Selective Merging Data Integrity

freemium $29.0 / One-off

Combine and merge multiple Outlook PST files by using PST merge software provided by GainTools.

Key GainTools Merge PST Software features:

User-Friendly Interface Efficient Performance File Size Handling Compatibility

Merges selected Outlook folders into destination folder.

Key Merge Folders for Outlook features:

Efficiency User-Friendly Interface Free to Use Compatibility

Joins several PST data files in the specified folder.

Key Merge PST Files for Outlook features:

Improved Organization Simplified Data Management Enhanced Searching Reduced Redundancy

Download PST Merger Software to combine multiple PST files into one PST file. This is a perfect solution to attach password protected PST file into a single PST file. It allows users to skip the duplicate items while merging two or more PST files.

freemium $49.0 / One-off (for Two Systems)

Free tool for merging selected Outlook mailboxes and PST data files into the specified store.

Key Merge Stores for Outlook features:

Enhanced Organization Improved Performance Space Efficiency Simplified Backup

A large set of useful and easy-to-use tools for every Microsoft Outlook user: Import, export and convert using EML,MSG,TXT and PST formats; remove duplicate items, process attachments and extract addresses; get reports and statistics and even more...

Key ReliefJet Essentials for Outlook features:

Comprehensive Functionality User-Friendly Interface Automation Capabilities High Compatibility

paid Free Trial $14.95 / One-off

CoolUtils OST to PST Converter: convert OST to PST without an Exchange Server connection. Very user-friendly. Free to try for 1 month.