Word Pro was based upon Ami Pro (originally published by Samna), but was substantially rewritten (including a new native document format). The predecessor to Ami Pro, Amí, was released in 1988, and was the first fully functional Windows word processor. (The Windows version of Microsoft Word would not debut until early 1989.) Shortly after the release of Amí, the development team added support for tables and renamed the product Ami Pro.
Lotus obtained Ami Pro to round out their office suite by acquiring Samna in 1990. Lotus continued to develop Ami Pro further with version 3 released in 1992. Version 3.1 is the last version of Ami Pro released (all versions were 16 bit). The Windows versions of Ami Pro were also bundled with Adobe Type Manager for Windows, as Windows had poor support for scalable fonts before the introduction of TrueType.
In 1994, Joe Guthridge was one of seven awarded the Windows Pioneer Award for feedback the Amí development team gave to Microsoft during the early development of Windows.