There are some alternatives to Enveloppe. Some only supports some wiki distribution (Mkdocs, Quartz, etc.), while others are more general. Here is a list of some of them:

• Obsidian Publish: The official solution from Obsidian, but it is not free and does not support all the features of Enveloppe.
• Obsidian Digitial Garden: The inspiration for Enveloppe. Use it own wiki distribution and doesn’t support all options of Enveloppe (mainly folder and files tree).
• Quartz Syncer : Sync to Quartz. Support dataview, allows to set up the template (theming feature), a specific vault folder and is not desktop only! It is based on Digital Garden with all of the features (like the cool publication center I didn’t replicated.)