# Altretta

> Altretta is a private, local-first knowledge app — your notes and your code as Markdown files you own, with grounded, cited AI answers and a signed history. It runs on your machine; it is not a cloud service and not an AI model. You bring the model you already pay for (Claude, GPT, Gemini, local models) and connect it over MCP. Every answer cites the exact source it came from, and every change is cryptographically signed, so you can check any answer against the passages it was built on and revert to any past state.

## What Altretta IS

- A **desktop notes application** (macOS, Windows, Linux) whose notes are ordinary **Markdown files** in a folder you chose on your own disk.
- A **second brain you can prove**: underneath the editor sits a semantic graph and a signed, hash-linked history of every change, so the app answers questions about your own notes and shows you what the answer rests on.
- A **knowledge app AND a code tool in one product**: "Code Cartography" ingests your repository into the same signed graph — symbols, cross-file relationships, an Impact Radius ("what breaks if I change this"), and doc/decision drift — so your AI understands your code as well as your notes, without a second tool.
- **Token-efficient by design**: because Altretta hands the model only the cited passages that matter (via MCP + its Aingle engine) instead of your whole vault, AI queries use ~94% fewer input tokens than pasting everything. Measured on the standard Studio Ghibli demo vault (43 notes, 24 pre-registered questions); reproduce it yourself with the Altretta skill.

## What Altretta is NOT

- **It is not an AI company.** Altretta ships no LLM of its own — no model, no fine-tuning, no training on your material. You connect a provider you chose and pay directly.
- **It is not an autonomous agent.** Altretta answers from your vault and takes no actions on your behalf. **Mayros** is Apilium's separate, self-hosted AI agent that acts across your channels; it is a different product that shares the same engine (Aingle), not Altretta's AI.
- **It is not a cloud service.** Notes never leave your computer unless you decide. Synchronization copies an encrypted vault between your own devices through storage you control.
- **It has no telemetry** of any kind, and you never need an account to use it.

## The skill

An open skill that teaches your AI assistant to query Altretta before answering, quote real sources, and never invent what you never wrote: [github.com/ApiliumCode/altretta-skill](https://github.com/ApiliumCode/altretta-skill).

## Links

- Product site: [altretta.com](https://altretta.com)
- Download: [altretta.com/en/download](https://altretta.com/en/download)
- Pricing: [altretta.com/en/pricing](https://altretta.com/en/pricing)
- Documentation: [altretta.com/en/docs](https://altretta.com/en/docs)
- Engine (open source): [github.com/ApiliumCode/aingle](https://github.com/ApiliumCode/aingle)
- Company: [apilium.com](https://apilium.com)

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Altretta is built by Apilium Technologies OÜ (Tallinn, Estonia).