What LightNote for Windows is
AlternativeTo files LightNote for Windows under Note-taking, Text Editor. It is recorded as Free, Proprietary, from Brazil. It ships on Windows. The topics its entry raises are Markdown, chat and code.
That is our reading of the record. For AlternativeTo's own wording, see its page for LightNote for Windows — the facts above were read on 2026-08-16.
| Price | Free |
|---|---|
| Licence | Proprietary |
| Category | Note-taking, Text Editor |
| Origin | Brazil |
| Platforms | Windows |
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 | LightNote for Windows |
|---|---|---|
| Price | $1/month, one plan, 7-day trial without a card | Free |
| Licence | Proprietary | Proprietary |
| Platforms | macOS, Windows, iOS, Android | Windows |
| Category | Note-taking — AI chat into Markdown | Note-taking, Text Editor |
| 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 mentions AI |
| Origin | Poland, EU | Brazil |
Where they differ
- LightNote for Windows is a place to have the conversation. SumizAI is not a chatbot — the conversation is the input, not the product. What comes out of it is a
.mdfile with a title, a place inbase.mdand a duplicate check against the notes already in the vault. If you only want to talk to a model, you do not need SumizAI. - LightNote for Windows 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, LightNote for Windows wins that row outright.
- 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. - AlternativeTo lists no mobile version of LightNote for Windows. SumizAI runs on macOS, Windows, iOS and Android.
Which one to pick
Reasons to pick LightNote for Windows
- it costs nothing
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 LightNote for Windows: AlternativeTo, read 2026-08-16. SumizAI is not affiliated with LightNote for Windows, and the name is used only to identify the product being compared.
Taken from the AlternativeTo lists: Obsidian.