Private company

Mozilla Messaging

Logo: https://web.facebook.com/Thunderbird/, Non-free logo, via Wikipedia3

Software company in Canada

Mozilla Messaging (abbreviated MoMo and formerly known as MailCo) was a wholly owned, for-profit subsidiary of the non-profit Mozilla Foundation. It was broadly tasked with aspects of the Mozilla Project that focused on interpersonal communications, such as instant messaging and e-mail. Its main focus was developing version 3.0 of Mozilla Thunderbird, the e-mail client developed by the Mozilla Foundation.2 It was founded by Mozilla Corporation.1 It is headquartered in Mountain View.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

2008Founded1

Mozilla Messaging (abbreviated MoMo and formerly known as MailCo) was a wholly owned, for-profit subsidiary of the non-profit Mozilla Foundation. It was broadly tasked with aspects of the Mozilla Project that focused on interpersonal communications, such as instant messaging and e-mail. Its main focus was developing version 3.0 of Mozilla Thunderbird, the e-mail client developed by the Mozilla Foundation.2

The story

Founded by Mozilla Corporation in 2008.1

Products and brands

  • Mozilla Thunderbird

Listed on Wikidata.1

Subsidiaries and ownership

Parent company

  • Mozilla Foundation

Owners

  • Mozilla Foundation

From Wikidata.1

Timeline

  1. 2008Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3