What OwnSync Note is
AlternativeTo files OwnSync Note under Note-taking. It is recorded as Paid, Proprietary. It ships on Software as a Service (SaaS). The topics its entry raises are Markdown, offline use, local files, privacy and sync.
That is our reading of the record. For AlternativeTo's own wording, see its page for OwnSync Note — the facts above were read on 2026-08-16.
| Price | Paid |
|---|---|
| Licence | Proprietary |
| Category | Note-taking |
| Origin | AlternativeTo does not say |
| Platforms | Software as a Service (SaaS) |
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.
Side by side
| Side by side | SumizAI | OwnSync Note |
|---|---|---|
| Price | $1/month, one plan, 7-day trial without a card | Paid |
| Licence | Proprietary | Proprietary |
| Platforms | macOS, Windows, iOS, Android | Software as a Service (SaaS) |
| Category | Note-taking — AI chat into Markdown | Note-taking |
| Where notes live | Standard .md files in a folder you choose | Its description mentions Markdown |
| AI model | Seven providers, always on your own API key | Its description does not mention AI |
| Origin | Poland, EU | AlternativeTo does not say |
Where they differ
- AlternativeTo's description of OwnSync Note 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.
- OwnSync Note is paid software. Compare the two numbers directly: SumizAI is one dollar a month, one plan, and your AI provider bills you separately for the model you chose.
- Both keep Markdown, which makes moving between them mostly a matter of copying files. In SumizAI a vault is a directory holding
base.md— a generated table of contents — and anotes/folder with one.mdfile per note. - OwnSync Note 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
Reasons to pick OwnSync Note
- you need it to run in a browser
Reasons to pick SumizAI
- the notes you want already exist inside conversations with an AI model
- you want the filing — title, chapter, duplicate check — to happen without you
- you want the result as plain
.mdfiles in a folder you picked - you would rather pay your AI provider directly than have a note app resell the model
Facts about OwnSync Note: AlternativeTo, read 2026-08-16. SumizAI is not affiliated with OwnSync Note, and the name is used only to identify the product being compared.
Taken from the AlternativeTo lists: Obsidian.