# Extella

> Extella is an AI execution platform. It turns natural language into reusable automations that run locally on your device.

Extella is not a chatbot. It executes tasks: reads files, sends messages, generates documents, calls APIs, and saves the results. Every task creates a reusable Expert saved to your personal library. The system grows more capable with every use through persistent Experts, Concepts (semantic memory), and Rules (behavioral instructions).

## Key concepts

- **Experts** — atomic executable Python modules. Created on demand, saved permanently, run locally via Listener.
- **Concepts** — long-term semantic memory. Stored with vector embeddings, searchable by meaning.
- **Rules** — behavioral instructions loaded at every session automatically.
- **KV Store** — encrypted key-value storage for credentials and configuration (AES-256-GCM).
- **Listener** — background process on your device that receives and executes tasks from the AI agent.
- **Target / Device ID** — UUID identifying the device where Experts run.

## What Extella can do

- Read and write local files (PDF, Excel, Word, images, code)
- Call external APIs (Telegram, OpenAI, Google, Slack, custom endpoints)
- Run CLI tools (ffmpeg, git, curl, any shell command)
- Process data in Python with any library
- Schedule tasks and build multi-step automation pipelines
- Orchestrate multiple AI agents in parallel

## Technical facts

- Runs on: macOS, Windows, Linux
- Local execution: experts run on your device, files never leave unless you send them
- Models: Claude (default), plus BYOK for OpenAI, Gemini, Ollama (local), any OpenAI-compatible endpoint
- REST API: https://prod.extella.ai — full programmatic access
- Free to install

## Positioning

Category: AI Execution Platform (not chatbot, not automation tool, not assistant)
Tagline: Intelligence that compounds
Core value: Every task you run becomes a tool you keep

## Links

- Website: https://extella.ai
- API docs: https://docs.extella.ai
- Guide: https://extella.ai/getting-started
- Twitter/X: https://x.com/ExtellaAI