SumizAI vs Euria

What Euria is

AlternativeTo files Euria under AI Chatbot, AI Writing. It is recorded as Free, Open Source — GPL-3.0, from Switzerland. It ships on Online, Android, iPhone, Android Tablet, iPad, Software as a Service (SaaS). The topics its entry raises are voice, chat and search.

That is our reading of the record. For AlternativeTo's own wording, see its page for Euria — the facts above were read on 2026-08-16.

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

Where they differ

• Euria 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 .md file with a title, a place in base.md and a duplicate check against the notes already in the vault. If you only want to talk to a model, you do not need SumizAI.
• Euria is open source (GPL-3.0), and SumizAI is not. If reading the source is what decides it for you, that is a real argument for Euria. The guarantee SumizAI offers instead is structural rather than legal: the notes are Markdown files in a folder you chose, so they open in any editor whether or not the application is running.
• AlternativeTo's description of Euria 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.
• Euria's description mentions voice. SumizAI has no voice input and no transcription — the input is a typed conversation.
• Euria 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.
• Both search. SumizAI's search reads the whole note — title, summary, body and the original question and answer — rather than titles alone.

Which one to pick