Yes, both SecondBrain.fyi and Feyn offer a Free Trial.
The starting price of SecondBrain.fyi begins at $19/month, while pricing details for Feyn are unavailable.
Feyn offers several advantages, including Named after Richard Feynman, Accessible through Twitter, Acts as personal assistant, Interactive through chat, NLP capabilities and many more functionalities.
The cons of Feyn may include a Only accessible through Twitter, No offline mode, May misunderstand user instructions, Reliant on user's internet connection. and Not specifically targeted for professional use
