Meta-Prompt Optimizer offers Free Trial, but Prompts Royale does not.
Pricing details for both Prompts Royale and Meta-Prompt Optimizer are unavailable at this time. Contact the respective providers for more information.
Prompts Royale offers several advantages, including Generates and ranks prompts, API key integration, Open-source tool, Accessible via Github, Objective-setting feature and many more functionalities.
The cons of Prompts Royale may include a Battles feature not explained, Requires API key integration, No GUI, command line only. and No support for other transformers