Notion, Standard Notes, Microsoft OneNote, Joplin, Simplenote, Evernote, Typora, Google Keep, CherryTree, Logseq, Anytype, Heptabase, RemNote, Nuclino, Microsoft Loop, Capacities, Notesnook, Zettlr, AppFlowy, Trilium Notes, Dendron, Supernotes, AFFiNE, SiYuan, QOwnNotes, Tangent Notes, Org-roam, Quillnote, Beaver Notes, Silverbullet, DeepNotes, Frontdoor, acreom are some alternatives to Obsidian.