#34 in Automation & WorkflowUpdated 2026-08

Leon

by Leon · Self-hosted open-source personal assistant built on Node.js and Python

30.8 — BenchRank score out of 100

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Overview

Leon is an open-source personal assistant that you host on your own server and ask to perform tasks. It is built with Node.js and Python and uses a modular architecture, so behaviour comes from skills you write or install. It supports text-to-speech and speech-to-text through cloud services including Google Cloud, AWS and IBM Watson, or offline engines.

Best for: Developers who want a self-hosted, open-source personal assistant they can extend with their own skills.
Pricing: No prices are shown; the software is released under the MIT licence and the site asks for GitHub sponsorship.
Runs on: CLI

Strengths and trade-offs

Strengths

MIT licensed and runs on a server you control
Modular skills architecture you can add to or build on
Several cloud and offline TTS and STT engines supported
Installed through a published CLI: npm i -g @leon-ai/cli

Trade-offs

You must supply and maintain the server it runs on
Setup is command line only; no hosted version is offered
Azure and Alibaba Cloud speech support are marked coming soon
Built largely by one maintainer in free time, funded by sponsorship

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
API quality: 20 out of 100
Documentation: 50 out of 100
Agent friendliness: 41 out of 100
Changelog: 55 out of 100
Marketing site structure: 65 out of 100
Operational trust: 0 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 85 out of 100
Maintenance: 100 out of 100

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