First Impressions
Unlike Gamma (which generates decks), Beautiful.ai is for building decks. You can't break the design. If I add a 4th bullet point, the layout shifts to accommodate it perfectly. It enforces good design.
Best Feature: Smart Templates
The charts are incredible. You drag a slider to change a percentage, and the pie chart animates to match. It looks professionally animated with zero effort.
The Verdict
The corporate choice. If you need strictly branded, professional slides, this beats PowerPoint hands down.