Yes, both PaperBrain and First Principles offer a Free Trial.
PaperBrain is designed for Academic Researchers, Academics, Uncommon Use Cases and University Students.
Pricing details for both PaperBrain and First Principles are unavailable at this time. Contact the respective providers for more information.
PaperBrain offers several advantages, including Enhanced Productivity, User-Centric Design, Academic Networking, Cross-Platform Access and many more functionalities.
The cons of PaperBrain may include a Learning Curve, Limited File Formats.