Quick notes or personal knowledge management?
Google Keep is a capture tool for quick thoughts, checklists, reminders, images, labels, and short notes. Memos and itsnotes stay closest to that workflow. Joplin, Notesnook, and Standard Notes add a more traditional notebook structure. Logseq, Tolaria, Anytype, and AppFlowy are larger knowledge-management systems with a steeper learning curve.
Sticky notes or notebooks?
Memos replaces folders with a chronological timeline. itsnotes keeps the visual card model and adds folders, list views, timeline markers, and Google Keep import. Joplin and Notesnook use more conventional notebooks and tags for people who need stronger organization.
Privacy, encryption, and local data
Notesnook and Standard Notes make end-to-end encrypted sync central. Anytype is local-first, peer-to-peer, and encrypted, but its current client license is source available. Logseq and Tolaria keep notes in local files. Memos and itsnotes can run on your own infrastructure. OpenNotas is listed with an unverified license, so confirm its terms before adopting it.
Direct replacements and adjacent tools
Memos and itsnotes are the closest capture-focused options; Joplin, Notesnook, and Standard Notes are general note applications. Logseq, Tolaria, Anytype, and AppFlowy are more structured knowledge platforms. Ryot tracks media and fitness information rather than general notes, so treat it as an adjacent personal tracker rather than a Keep replacement.