Yes, both Semanticscholar and Epsilon offer a Free Trial.
The starting price of Epsilon begins at $4.08/month, while pricing details for Semanticscholar are unavailable.
Semanticscholar offers several advantages, including Aggregates scientific literature, Covers various science fields, Archives over 211 million papers, Includes Semantic Reader for augmented reading, Improved API for developers and many more functionalities.
The cons of Semanticscholar may include a Limited to scientific literature, No offline access, No language translation options, Requires sign up for alerts. and No mobile application