Short answer: Standard Notes encrypts entries and syncs the encrypted vault to a server. Mini Diarium encrypts entries and keeps them on your device only, with no sync service, no server, and no network code in the binary. If sync is not a requirement, the two apps make different architectural trade-offs for private journaling.
If you are looking for a Standard Notes alternative for journaling, you are probably not questioning whether encryption matters. Standard Notes gets that right. The more likely question is whether end-to-end encrypted sync to a server matches what you actually want, or whether a tool designed specifically for diary writing would be a better fit than a general-purpose encrypted notes vault.
Those are two different questions, and they lead to different answers.
What Standard Notes is built for
Standard Notes is a capable encrypted notes tool. It stores your vault with end-to-end encryption, syncs across devices through a managed service, and supports a broad plugin ecosystem including code notes, spreadsheets, and extended Markdown editors. The source code is public under an MIT license. On the privacy spectrum for notes apps, it sits meaningfully above cloud tools that store plaintext on their servers.
The sync service follows a freemium model. A free tier is available, but some editors and advanced features require a paid subscription. Without a paid plan, the writing experience is limited to the base editor.
That is worth acknowledging directly. Standard Notes made encryption a core design constraint rather than an optional extra. This post is not about dismissing that. It is about what the architecture means in practice for people who want diary writing specifically, and why some of those users end up looking elsewhere.
The difference the architecture makes
Standard Notes encrypts your vault before sending it to their servers. The server stores ciphertext it cannot decrypt. This is how end-to-end encryption works and it is a real guarantee: the service operator cannot read your entries.
The encrypted files still live on a server, though. Your account and login activity generates metadata. Access depends on a working account and a running service. Whether those facts matter depends on your threat model. If the primary concern is a service reading your writing, Standard Notes addresses that. If the concern extends to server-side metadata, service continuity, or what happens if the pricing model changes, those questions are harder to answer when a server holds a copy of your vault.
Mini Diarium is built around a different boundary. There is no HTTP client in the binary, no sync service, and no account to create. Journal entries are encrypted with AES-256-GCM before being written to a local SQLite database, and they go nowhere else. The encrypted journal is a file on your disk, accessible only with your key, and independent of any service staying online.
That architecture is not the right fit for every use case. It means no cross-device sync and no managed remote backup. It is a deliberate trade-off that makes the privacy guarantee simpler to reason about over time.
Journaling versus a general notes vault
Standard Notes is designed for general-purpose private notes. It supports multiple content types: plain text, Markdown, code snippets, spreadsheets. This breadth makes it useful well beyond journaling, as a full encrypted workspace for personal writing and organization.
Mini Diarium is built around diary writing as the primary use case. The interface organizes entries by date. A calendar view lets you navigate to any day in your journal history. Writing statistics track word counts and streaks. The TipTap editor handles rich text formatting including images. Import is supported directly from Mini Diary JSON, Day One JSON and TXT, and jrnl JSON, which are all diary and journal formats.
If you use Standard Notes primarily as a daily journal, you are using a general tool for a more specific job. The encryption foundation is solid, but the journaling workflow is not what the product was designed around. For the specific decision of how to choose a private journal app, the criteria differ from evaluating a general encrypted notes tool, and a purpose-built app handles the day-to-day writing experience differently.
Where Mini Diarium fits
Mini Diarium is a desktop journal for Windows, macOS, and Linux. It is fully free and released under the MIT license. Each entry is encrypted with AES-256-GCM before it is written to a local SQLite database. The app has no network client and no telemetry.
Authentication supports both password and key-file unlock. The key-file option uses X25519 and works like an SSH private key: the file is the credential, and a password can be required as a second factor. A passwordless option also exists for journals locked to the device with a device-bound key.
Exports cover JSON and Markdown. Imports work from Mini Diary, Day One, and jrnl formats. The comparison page has a full feature matrix against Day One, Notion, Obsidian, Standard Notes, and others.
The main limitation is that Mini Diarium is currently desktop-only. Standard Notes has mobile apps and sync across devices. If writing across phone and computer is a requirement, Mini Diarium does not currently support that.
The practical takeaway
Standard Notes and Mini Diarium both use strong encryption and neither stores plaintext on a server. The difference is where entries live after encryption. Standard Notes keeps an encrypted copy on a server to enable sync. Mini Diarium keeps entries on your device only, with no server involved.
If sync across devices is important, Standard Notes is a well-built option with a real privacy story. If sync is not a requirement and you want a private journal where entries stay on your machine, Mini Diarium is built around that constraint from the start.
For background on what encryption at rest actually means compared to a password screen, that post covers the distinction clearly. If you want the broader checklist for evaluating local-only journal apps, the journal app without cloud guide is a practical place to start.