Day One alternatives: 8 open-source picks
Day One costs $4.17/mo — $50.04 a year. These 8 alternatives replace it for $0, led by moodiary, AppFlowy and AFFiNE. All 8 are open source. License, stars and last commit checked by hand on 2026-08-29. No trials, no crippled tiers.
A real diary app with media, maps and sync, not a notes app wearing a calendar.
AI-powered workspace with docs, wikis, and kanban boards built in Rust/Flutter
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Docs, whiteboards, and databases fused into one local-first workspace
licenseMIT (open core)
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Markdown note-taking app with E2E-encrypted sync across all platforms
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Privacy-first block-based personal knowledge management with bidirectional links
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Local-first outliner for networked thought with backlinks and daily journals
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Fast, collaborative team wiki and knowledge base with slick editor
licenseBSL-1.1
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
End-to-end encrypted note-taking with sync — open-source Evernote done right.
licenseGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
What each one is, in full: AppFlowy · AFFiNE · Joplin · SiYuan · Logseq
last updated 2026-08-29 · no votes, no pay-to-list · just what's real
how to choose a Day One alternative
Easiest to get running
moodiary — a one-click install, no server to maintain.
Most proven
AppFlowy, with 75,000 GitHub stars — the largest community of the 8, which usually means more answers when something breaks.
Works on your phone
moodiary has a mobile app on iOS and Android.
what you give up by leaving Day One
- conflict-safe multi-device sync
- mature importers and exporters
- collaborative editing and sharing
- native mobile clients
None of the picks above covers all of it. The full verdict says which gaps matter.
Day One alternatives at a glance
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| moodiary | open source | one-click install | macos, windows, linux, ios, android | 1,900 | 2026-07 |
| AppFlowy | AGPL-3.0 | docker to self-host | self-hosted, web | 75,000 | 2026-08 |
| AFFiNE | MIT (open core) | docker to self-host | self-hosted, web | 71,000 | 2026-08 |
| Joplin | AGPL-3.0 | one-click install | self-hosted, web | 56,000 | 2026-08 |
| SiYuan | AGPL-3.0 | one-click install | self-hosted, web | 46,000 | 2026-08 |
| Logseq | AGPL-3.0 | one-click install | self-hosted, web | 44,000 | 2026-08 |
| Outline | BSL-1.1 | docker to self-host | self-hosted, web | 40,000 | 2026-08 |
| Notesnook | GPL-3.0 | docker to self-host | self-hosted, web | 12,000 | 2026-08 |
why people still pay for Day One
Day One: People pay for a writing surface they trust for years, plus migration tools, sync, and tiny interaction details that disappear into habit. If none of that applies to you, any pick above saves $50.04 a year.
questions about switching from Day One
Is there an open-source alternative to Day One?
Yes: moodiary, AppFlowy, AFFiNE and 5 more. Every tool on this page is open source: no trials, no crippled tiers.
Can open source really replace Day One?
Our verdict is YES. AppFlowy (75k stars), AFFiNE (71k stars), Joplin (56k stars) are mature open-source replacements for Day One — self-host with docker and stop paying $4.17/mo. The full verdict, and what you give up by switching, is at caniopensourceit.online/day-one.
What is the easiest open-source Day One alternative to set up?
moodiary — a one-click install, no server to maintain.
What is the most popular open-source Day One alternative?
By GitHub stars, AppFlowy (75,000). AFFiNE is next with 71,000.
