Yes, both Just Prompts and PromptPerfect offer a Free Trial.
The starting price of PromptPerfect begins at $16.67/month, while pricing details for Just Prompts are unavailable.
Just Prompts offers several advantages, including Additive Prompting feature, Enhances user-generated prompts, Allows for more context, Allows for nuanced inputs, Generates more accurate outputs and many more functionalities.
The cons of Just Prompts may include a Requires obtaining API key, Only two developers, Lacks specific model compatibility.
PromptPerfect offers several advantages, including Optimizes prompts for LLMs/LMs/LMOps, Supports ChatGPT, GPT-3.5, DALLE, StableDiffusion and many more functionalities.
The cons of PromptPerfect may include a Limited model compatibility, Targeted at specific users, Only optimizes language prompts, Non-obvious results comparison. and Requires prompt input
