Aid4Mail is a popular email migration and conversion tool that helps users transfer and convert email messages between different email clients.
$29.95 - $399.95
Best ImportExportTools NG Alternatives ranked by AI · updated Aug 2026
ImportExportTools NG is a free, open-source Thunderbird extension for importing and exporting messages, folders, and address books. It is best for Thunderbird users who need lightweight EML, HTML, CSV, or mailbox exports rather than proprietary PST conversion.
Developer: Christopher Leidigh and contributors
Price: Free
🎯 github.com/thunderbird/import-export-tools-ng
Top 6 ImportExportTools NG alternatives
SysTools MBOX Converter is a tool to convert MBOX files to various formats like PST, PDF, EML, MSG, HTML, and more.
MailsDaddy MBOX to PST Converter is a software tool that allows users to convert MBOX files to PST format for Outlook.
BitRecover Thunderbird Converter Wizard is a Windows utility for exporting Thunderbird MBOX mailboxes into formats such as PST, EML, MSG, PDF, and...
Pros
- Supports several output formats beyond PST
- Preserves mailbox folder structure during conversion
- Designed specifically for Thunderbird MBOX data
Cons
- Windows-focused compared with cross-platform alternatives
- Less established brand recognition than Stellar or Aid4Mail
- Commercial licensing is less transparent than free tools
Stellar Converter for MBOX is a popular tool to convert MBOX files to PST format.
Pros
- Fast conversion speed
- Preview feature available
Cons
- Does not support as many output formats as SysTools MBOX Converter
- Interface can be overwhelming for beginners
6
Kernel for MBOX
Kernel Data Recovery
Kernel for MBOX converts MBOX files from clients such as Thunderbird and Apple Mail into PST, EML, MSG, and other formats. It...
Pros
- Provides direct MBOX-to-PST migration for Outlook users
- Supports selective mailbox and folder conversion
- Includes preview functionality before export
Cons
- Windows-focused and less flexible than Aid4Mail
- Commercial pricing may not suit one-time personal use
- The product range and licensing structure can be confusing
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