Yes, both Big Speak and Narration Box offer a Free Trial.
Pricing for Big Speak Starts at $49/month whereas for Narration Box Starts at $12/month.
Big Speak offers several advantages, including Multi-lingual voiceovers, Customization available, Voice cloning feature, Realistic audio generation, Text-to-speech capability and many more functionalities.
The cons of Big Speak may include a Character limit for non-registered, Character limit for registered, Voice cloning limited to English, Audio transcription limited languages. and Voice quality unspecified
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