Dev tools · alternatives · 2026

24 alternatives to Thunderbird to Office 365 Converter

Convert Thunderbird mailbox to Office 365 with attachments

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Thunderbird to Office 365 Converter launched in 2023; newer entries below may have overtaken it.

1. 1
   Mozilla Thunderbird Backup Tool▲66

   Advanced solution to backup and migrate Thunderbird emails

   2022 · its alternatives →

2. 2
   BitData Migration Thunderbird Converter ▲5

   Directly convert batch thunderbird data to another formats

   2024 · its alternatives →

3. 3
   Thunderbird 115 Supernova▲175

   Make email easier

   2023 · its alternatives →

4. 4
   DRS Softech Microsoft 365 Backup Tool▲11

   One Click to Backup, Migrate, and Protect Office 365.

   2025 · drssoftech.com · its alternatives →

5. 5
   Office 365 Migration Tool▲64

   Backup tool for exporting Microsoft 365 mailbox data

   2022 · its alternatives →

6. 6
   Thunderbird Converter Tool▲2

   To Convert Thunderbird mailbox emails

   2022 · its alternatives →

7. 7
   Mailbird for Mac▲375

   Email the way you like it, now on Mac

   2024 · its alternatives →

8. 8
   Office 365 Export Tool▲2

   To export Office 365 emails to various file formats

   2023 · its alternatives →

9. 9
   O365 Tenant to Tenant Migration Tool▲92

   Sysinfo Office 365 tenant to tenant migration tool

   2023 · its alternatives →

10. 10
    MigrateEmails Thunderbird Backup Tool▲3

    Best Tool to Backup Thunderbird Emails to 15+ Formats Easily

    2023 · its alternatives →

11. 11
    4n6 Thunderbird Converter Software▲2

    Convert Thunderbird Emails to Different File Formats

    2022 · its alternatives →

12. 12
    Email Workflows by Salesflare 💌▲193

    Sequences, drips & onboarding emails from PH's favorite CRM

    2020 · its alternatives →

13. 13
    Office 365 Converter▲1

    Best Tool to Convert Office 365 Emails

    2022 · its alternatives →

14. 14
    SysInfo Thunderbird Email Backup Tool

    Secure Thunderbird backup and email migration tool

    Mar 2026 · sysinfotools.com · its alternatives →

15. 15
    CubexSoft Mailbird Converter▲2

    Export Mailbird DB Files to File Formats/Email Services

    2022 · its alternatives →

16. 16
    DRS Softech Zoho Email Migration Tool ▲11

    DRS Softech Zoho Migration Secure Easy Email Transfer

    2025 · drssoftech.com · its alternatives →

17. 17
    DRS Softech Zoho Mail to Office 365 ▲6

    Fast & Secure Zoho Mail to Office 365 Migration

    Sep 2025 · drssoftech.com · its alternatives →

18. 18
    Pop3.io▲4

    Thunderbird for the web. Your unified inbox.

    Jun 2026 · pop3.io · its alternatives →

19. 19
    MailDivert MBOX Converter▲9

    Convert MBOX Mailboxes to 20+ saving options with precision

    2025 · its alternatives →

20. 20
    Office 365 to Office 365 Migration Tool▲1

    Migrate emails from Office 365 account to O365 accounts

    2022 · its alternatives →

21. 21
    MacSonik OLM Converter▲3

    Advanced Mac OLM Converter Support More Than 10 File Formats

    Jul 2026 · macsonik.com · its alternatives →

22. 22
    OLM Converter▲55

    Optimum tool to convert OLM file without losing any data

    2022 · its alternatives →

23. 23
    EdbMails EML to PST Converter▲6

    Migrate EML emails to Outlook in just a few clicks

    2025 · its alternatives →

24. 24
    Mail Backup X▲9

    Mail Backup, Archiver, Viewer & Converter for macOS & PC

    2025 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →