Based on our record, TOAST UI Editor seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If you need a WYSIWYG markdown editor you can try Toast UI Editor or simply use Markdown Live add-on for Visual Studio Code. Source: 11 months ago
https://github.com/nhn/tui.editor Might be close to what you are after. - Source: Hacker News / over 1 year ago
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