ShortlyAI is a fantastic blank canvas AI writing tool.
You can use it for all sorts of writing, I use it for mainly blog posts writing. If you take the time to learn the keyboard shortcuts, you can speed up your content creation.
ConversionAI (Jarvis) has purchased ShortlyAI but they will not change the format which is great as the blank canvas style is very unique.
You can write formal content, blog posts, ads, emails, Facebook posts even creative stories.