Best Open Source Alternatives to Day One

Compare the best free and open-source alternatives to Day One — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 1 alternatives

Day One

Proprietary SaaS

PricingPaid

Platformsdesktop, web

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Day One alternatives compared

Open-source alternatives to Day One, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
RedNotebook	561	GPL-2.0	Linux	No	Oct 2026	Visit

Top open-source Day One alternatives

RedNotebook561GPL-2.0

RedNotebook is an open-source desktop journal replacing Day One with offline calendar entries, hashtag indexing, and plain text storage.

Linux

vs Day One: a free, open-source option you fully control, licensed GPL-2.0.

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Best Open Source Alternatives to Day One

Day One

Day One alternatives compared

Top open-source Day One alternatives

The modern standard for Protobuf workflows

Mentoring for backend developers. Consulting for startups.