Fillable Document is a great add-on for Commercial, Educational as well as Non-Profit organisations for all your document automation needs.
You can choose from the below plans based on your profile and usage pattern.
Basic plan of "Fillable Document" is FREE with limited quota.
FREE Quota per month
10 Google Docs/ PDF generation per month
50 saves into Google Sheets per month
50 bulk document generation per month (Applicable only for Fillable Document For Sheets add-on)
The quota resets in the starting of every month (when users try using Fillable Document)
For professional features and additional quota, you can take a paid plan from one of the below
Note: Single license works for both Fillable Document and Fillable Document for Sheets add-on