The Wikipedia editors know, https://en.wikipedia.org/wiki/Zoom_Communications#Early_year... :

> In May 2012, the company changed its name to Zoom, influenced by Thacher Hurd's children's book Zoom City.

It cites https://vator.tv/2020-03-26-when-zoom-was-young-the-early-ye... where Jim Scheinman says:

> “I loved this fun little book as much as my kids, and hoped to use the name someday for the perfect company that embodied the same values of creativity, exploration, happiness, and trust. And the name works perfectly with a product that connects us visually to one another and that always works so fast and seamlessly.“

> In May 2012, the company changed its name to Zoom, influenced by Thacher Hurd's children's book Zoom City.

To save people the agony of visiting Wikipedia for themselves to check, changed from Saasbee. Which, good call.

The reference to "Zoom City" is from an article published in 2020. It seems like a remarkably fitting ret-conning of what is probably a very boring branding decision.