Yes, both Speak4me and Narration Box offer a Free Trial.
Pricing for Speak4me Starts at $12.99/month whereas for Narration Box Starts at $12/month.
Narration Box offers several advantages, including Over 20 languages, Audiobooks from ebooks, Host audio pages, Audio widgets, Podcasting capabilities and many more functionalities.
The cons of Narration Box may include a Podcasting feature not available, Widgets still in development, API pending implementation, Analytics feature coming soon. and subscription model unclear