Neither Zotero nor Obsidian offers a free trial.
Zotero is designed for Individuals, Medium Business and Small Business.
Obsidian is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Obsidian begins at $25One-time fee, while pricing details for Zotero are unavailable.
Some top alternatives to Zotero includes Qualified, Workvivo, JabRef, Citavi, Paperpile, EndNote, Obsidian, ReadCube Papers, Citationsy, RefWorks, EasyBib and IFTTT.
Some top alternatives to Obsidian includes CoderNotes, Contexted, Knote, Joplin, Note Garden, Notabase, NotesHub, Qualified, Notion Second Brain, Workvivo, IFTTT and Noties.