SumizAI vs Secure Notes Vault

What Secure Notes Vault is

What Secure Notes Vault is

Secure Notes Vault is a notes app built around one principle: privacy first, no exceptions. The app runs on a zero-knowledge model, meaning note content is encrypted client-side with AES-256-GCM before it ever leaves the user's device — even the app's creator has no technical way to read anyone's journals or sketches. That approach makes Secure Notes Vault an answer to an increasingly common question: who do I actually trust with my most personal writing.

Key features

Client-side encryption means the encryption key never leaves the user's device in plain form, so intercepting data on the server reveals nothing about note content. Support for journals, text notes, and sketches in one app lets users keep different forms of personal expression in one encrypted place instead of spreading them across several tools with varying levels of security. The zero-knowledge model also means that in the event of a server data leak, an attacker only gets an unreadable, encrypted string of characters. A simple, content-focused online interface removes the distracting elements typical of notes apps bundled with social features or ads.

Who it's for

Secure Notes Vault appeals to people keeping a personal journal who don't want their most intimate thoughts sitting on servers accessible to company staff or potentially exposed in readable form in a breach. Journalists and activists working in contexts where the confidentiality of their notes has real safety implications find a tool built specifically to protect content. People jotting down quick idea sketches they'd rather keep entirely their own are also a natural audience.

Use cases

In practice, Secure Notes Vault works well for keeping a daily personal journal, where honesty in the writing depends on being certain no one but the author will ever read it. Someone going through a difficult period can write therapeutic thoughts knowing the content is protected by strong encryption from the very start. A creator jotting down ideas for future projects, before they're ready to share with anyone, uses the app as a safe, private sketchpad.

Pricing and business model

Secure Notes Vault is available for free as a closed-source, online-only app. The absence of a subscription model means users don't have to weigh whether privacy is worth paying for — it's part of the core free offering, not a paid add-on reserved for higher tiers.

Limitations and what to watch for

Being online-only, with no native mobile app and no offline mode, means access to notes requires a constant internet connection — a real limitation for a journal written while traveling without signal. Zero-knowledge also means that if a password is forgotten, the app's creators have no way to recover it or restore access to the notes — full privacy comes with full user responsibility for login credentials.

AI notes and an encrypted space

Secure Notes Vault has no built-in AI model integration, but anyone wanting to keep an ai notes entry from a conversation with an assistant can paste it in manually as a new entry, benefiting from the same encryption as the rest of the journal. For someone who wants ai notes from sensitive, personal AI conversations protected just as rigorously as an intimate journal, that trade-off — manual copying instead of automatic saving — makes sense.

Trust without having to trust

The zero-knowledge model changes the fundamental question a notes-app user asks themselves — instead of "do I trust this company not to read my notes," the question becomes "does the encryption math work the way it's claimed to." That's a subtle but important difference: even if the company behind Secure Notes Vault changed its privacy policy or was acquired by another entity, notes written earlier remain unreadable without the key known only to the user.

Simplicity as a security feature

The app deliberately avoids elaborate social features, external cloud integrations, or third-party plugins — every extra piece of a system is a potential attack surface. That simplicity, while limiting compared to more elaborate notes apps, is a deliberate trade-off in favor of security rather than a lack of product ambition. For many users, that trade-off of convenience for security is exactly what they were looking for after a string of high-profile data leaks from popular but closed cloud notebooks in recent years.

A daily ritual of writing in a safe place

Knowing that no one else will ever read a given entry changes how people write — research on journaling shows that authors write more honestly and more deeply when they know the text is genuinely private, not just theoretically protected by a password the service provider could bypass. Secure Notes Vault builds on that observation, offering a place where the first draft of a difficult thought doesn't need to be edited with an eye toward who might accidentally see it. That's the difference between writing "for yourself" and writing "for yourself, but politely just in case" — and those two modes produce very different results.

What's worth checking before choosing

Before starting a journal in Secure Notes Vault, save the password in a secure password manager — without it, recovering encrypted notes isn't possible. It's also worth checking whether working online-only, with no offline mode, fits your note-taking style.

Bottom line

Secure Notes Vault is a consistently designed, free notes app for people whose privacy is a hard requirement, not a nice-to-have. Anyone who wants ai notes from AI conversations to land automatically in an encrypted archive without manual pasting should consider a tool built around that specific workflow.

Comparison with SumizAI

Secure Notes Vault and SumizAI take different approaches to privacy and content source. Secure Notes Vault encrypts notes the user writes by hand, with a zero-knowledge model that protects even against the service provider itself. SumizAI generates ai notes directly from a conversation with an AI model, saving them as Markdown files in a vault the user owns, locally, rather than on a third-party server. Anyone looking for an encrypted online journal for hand-written entries will pick Secure Notes Vault; anyone who wants ai notes from AI conversations to land straight in their own local files will find SumizAI the better-fitting tool.

What SumizAI is

A note-taking application built around a conversation with an AI model. You ask a question, the answer streams back, and the answers worth keeping become Markdown notes — filed into a vault that is a folder on your own disk.

A vault is a directory holding base.md, a generated table of contents up to six levels deep, and a notes/ folder with one .md file per note. Before a note is written it is checked against the ones already there, so the fourth note about the same idea gets merged instead of added. Links between notes are ordinary Markdown links to files that exist.

The model is never ours: you bring your own API key to one of seven providers — Anthropic, OpenAI, Gemini, Groq, OpenRouter, a local Ollama or your own server — and pay that provider directly. A question sends the table of contents plus at most five relevant notes within a 24,000-character budget, and the app shows you which five it used.

Every answer kept this way becomes one of these ai notes, ready to search again months later without hunting back through old chats.

Side by side

Where they differ

• AlternativeTo's description of Secure Notes Vault does not mention an AI model. That is the whole starting point in SumizAI: you have a conversation with a model on your own API key, and the answers worth keeping become notes without you filing them.
• Secure Notes Vault is free and SumizAI costs a dollar a month after a seven-day trial that takes no card. A dollar is what it costs to run accounts and licences without reselling the model; if free is the requirement, Secure Notes Vault wins that row outright.
• AlternativeTo's description of Secure Notes Vault does not mention Markdown, so check what format your notes end up in before you fill it up. SumizAI writes standard .md files to a folder you picked, and an unpaid account can still export all of them.
• Secure Notes Vault advertises encryption. SumizAI answers the same worry a different way: on the desktop the notes never leave your disk, and the material a question sends to the model is capped at the table of contents plus at most five notes — and the app shows you which five it used.
• Secure Notes Vault supports handwriting or drawing. SumizAI is typed text only.
• Secure Notes Vault runs in the browser. SumizAI is a desktop and mobile application, and on the desktop the vault is a folder on your own disk rather than a document in someone's cloud.

Which one to pick