Yes, both Nureply and Content Spark offer a Free Trial.
The starting price of Nureply begins at $99/month, while pricing details for Content Spark are unavailable.
Nureply offers several advantages, including Personalizes outbound sales emails, Optimizes email content, Efficient email scheduling, Automatically creates email campaigns, Optimizes for open and many more functionalities.
The cons of Nureply may include a No API available, No CRM integration offered, Limited to email campaigns, Trains only on public data. and Limited to one-week free trial