Meet Mustang
Mustang is a second interface for Mustang that looks and works like Outlook. What it is, what it isn't, and why we built it.
Mustang
Blog
What Mustang is, how we build it, and how to leave Microsoft without leaving your people behind.
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Leave Microsoft one step at a time
Digital sovereignty projects stall at the desk, not in the data center. A plan in three steps that people barely notice.
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Who writes Mustang?
The core of Mustang was written by people over five years. The Mustang interface was written mostly by AI, under their direction. How that works.
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Who we are and why we do it
The people behind Mustang have built mail software for a long time, from the mail core of Thunderbird to Owl for Exchange. Why we started again with Mustang.