Yes, both Storydoc and Slidesai offer a Free Trial.
Pricing for Storydoc Starts at $30/month whereas for Slidesai Starts at $8.32/month.
Slidesai offers several advantages, including Create slides from text, Free installation from Google marketplace, Customizable look and feel, Pre-designed color and font presets, Multiple pricing plans and many more functionalities.
The cons of Slidesai may include a Limited language support, Only for Google Slides, Character limit per input, Restricted presentations in basic plan. and No document upload in basic
