# Atticus vs Leon > Atticus scores 42.9 (E) to Leon's 41 (E) for assistants that remember you. Prices, MCP, x402, uptime and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/atticus-vs-leon - Markdown: https://www.anchorterminal.com/compare/atticus-vs-leon.md (~3,250 tokens) - Slim: https://www.anchorterminal.com/compare/atticus-vs-leon.min.md (~480 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/atticus-vs-leon.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Licence: CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author. - Updated: 2026-10-15 Atticus scores 42.9 (E) on agent readiness against Leon's 41 (E), and leads in 3 of 7 scored categories. Leon leads on schema & documentation and agent ergonomics. Both do assistants that remember you. - Atticus: grade E, 42.9/100, rank #974 of 1094. Markdown https://www.anchorterminal.com/tools/atticus.md · JSON https://www.anchorterminal.com/api/v1/tools/atticus.json - Leon: grade E, 41/100, rank #995 of 1094. Markdown https://www.anchorterminal.com/tools/leon.md · JSON https://www.anchorterminal.com/api/v1/tools/leon.json - Best AI personal assistants that act for one person: https://www.anchorterminal.com/best/personal-assistants/index.md - All 875 assistants comparisons: https://www.anchorterminal.com/compare/personal-assistants/index.md ## Which one, for what ### Atticus (E) Good for: A person on macOS 26 with a Claude Pro or Max plan who wants voice control of apps, windows, files and the browser. Ahead on: - Reliability, 68 against 32 - Security & auth, 49 against 34 - Maintenance & community, 51 against 15 Watch for: No API, MCP server or documented command an outside agent can call ### Leon (E) Good for: A developer who wants a self-hosted assistant with memory, computer use and a local model, and who will read the source. Ahead on: - Schema & documentation, 33 against 15 - Agent ergonomics, 57 against 9 Watch for: No tagged release of the core since 1.0.0-beta.8 on 1 May 2023. The 2.0 Developer Preview is installed by cloning the develop branch ## Score by category | Category | Weight | Atticus | Leon | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 68 | 32 | Atticus +36 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 15 | 33 | Leon +18 | | Agent ergonomics | 13% (16.2 this run) | 9 | 57 | Leon +48 | | Security & auth | 14% (17.5 this run) | 49 | 34 | Atticus +15 | | Payments & pricing | 10% (12.5 this run) | 60 | 60 | even | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 51 | 15 | Atticus +36 | | Transparency & trust | 7% (8.8 this run) | 56 | 60 | Leon +4 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **42.9 · E** | **41 · E** | | ## Facts side by side | Fact | Atticus | Leon | | --- | --- | --- | | Kind | Platform | Agent harness | | Vendor | SaarthurR (Saarth Ranka) | Louis Grenard (Leon AI) | | Hosted endpoint | no (local only) | no (local only) | | Transports | | | | Auth | None | None | | Pricing | Your plan | Free | | x402 | no | no | | Licence | MIT | MIT | | Read-only variant documented | no | no | | llms.txt | no | no | | Last release | 2026-10-14 | 2023-05-01 | | Terms last updated | no document linked | no document linked | | Privacy policy last updated | no document linked | no document linked | | Customer content may train models | | | | Terms restrict automated access | | | | Terms restrict benchmarking | | | | Terms or service can change without notice | | | | Arbitration or class-action waiver | | | | Popularity | 163 stars | 18k stars | ## Verdicts **Atticus.** Atticus runs a person's Mac by voice on their existing Claude or Devin plan, with a sandboxed safe mode and a local log of every command. It has no API, MCP server or documented command for another agent, it is five days old, and it rebuilds itself from the main branch every six hours by default. **Leon.** Connected-app credentials are encrypted per profile and the Gmail connection is read-only. The 2.0 Developer Preview has no tagged release, runs tools and a 30-minute proactive pulse with no approval step, listens on every network interface with client authentication off, and sends telemetry by default. ## Before you call either ### Atticus 1. Don't plan to call Atticus from another agent. It takes requests only from its own shortcut and typing box 2. If a user runs Atticus beside you, expect it to move windows and type into apps on the same Mac 3. Point a user who wants pinned versions to Settings > About & Updates to turn off self-update ### Leon 1. Clone the develop branch for 2.0. `npm install --global @leon-ai/cli` and docs.getleon.ai install and describe the legacy 1.0 betas 2. Set `client_interface.auth.enabled: true` and a `LEON_PROFILE_TOKEN` before the machine joins a shared network. The server binds 0.0.0.0 3. Set `telemetry_enabled: false` and `runtime.pulse_enabled: false` in the profile `config.yml` for an unattended or private run 4. Use `availability.tools.allowed` to limit tools. Shell, file writes, computer use and browser control are otherwise available to the agent with no approval prompt 5. Back up `LEON_CONNECTIONS_ENCRYPTION_KEY` from the profile `.env`. Without it the stored connections cannot be read ## Questions ### Which is better for AI agents, Atticus or Leon? Atticus scores 42.9 (E) on agent readiness against Leon's 41 (E), and leads in 3 of 7 scored categories. Leon leads on schema & documentation and agent ergonomics. ### Are Atticus and Leon open source? Yes. Atticus is open source (MIT). Leon is open source (MIT). ## For agents - This comparison as JSON: https://www.anchorterminal.com/compare/atticus-vs-leon.json, and with the fewest tokens: https://www.anchorterminal.com/compare/atticus-vs-leon.min.md - Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "atticus", "b": "leon"}`. From a terminal: `anchor compare atticus leon` - Each listing in full: https://www.anchorterminal.com/api/v1/tools/atticus.json and https://www.anchorterminal.com/api/v1/tools/leon.json ## Other comparisons with Atticus or Leon - [AstrBot vs Leon](https://www.anchorterminal.com/compare/astrbot-vs-leon.md) - [Boski vs Leon](https://www.anchorterminal.com/compare/boski-vs-leon.md) - [Caddy vs Leon](https://www.anchorterminal.com/compare/caddy-app-vs-leon.md) - [CowAgent vs Leon](https://www.anchorterminal.com/compare/cowagent-vs-leon.md) - [folk vs Leon](https://www.anchorterminal.com/compare/folk-nozomio-vs-leon.md) - [GAIA vs Leon](https://www.anchorterminal.com/compare/gaia-vs-leon.md) - [Gemini Spark vs Leon](https://www.anchorterminal.com/compare/gemini-spark-vs-leon.md) - [Grok Bot vs Leon](https://www.anchorterminal.com/compare/grok-bot-vs-leon.md) - [Haven vs Leon](https://www.anchorterminal.com/compare/haven-vs-leon.md) - [Hermes Agent vs Leon](https://www.anchorterminal.com/compare/hermes-agent-vs-leon.md) - [Instinct vs Leon](https://www.anchorterminal.com/compare/instinct-vs-leon.md) - [IronClaw vs Leon](https://www.anchorterminal.com/compare/ironclaw-vs-leon.md) - [Leon vs Lindy](https://www.anchorterminal.com/compare/leon-vs-lindy.md) - [Leon vs nanobot](https://www.anchorterminal.com/compare/leon-vs-nanobot.md) - [Leon vs NanoClaw](https://www.anchorterminal.com/compare/leon-vs-nanoclaw.md) - [Leon vs Dots](https://www.anchorterminal.com/compare/leon-vs-openai-dots.md) - [Leon vs OpenClaw](https://www.anchorterminal.com/compare/leon-vs-openclaw.md) - [Leon vs PicoClaw](https://www.anchorterminal.com/compare/leon-vs-picoclaw.md) - [Leon vs Poke](https://www.anchorterminal.com/compare/leon-vs-poke.md) - [Leon vs QwenPaw](https://www.anchorterminal.com/compare/leon-vs-qwenpaw.md) - [Leon vs Town](https://www.anchorterminal.com/compare/leon-vs-town.md) - [Leon vs ZeroClaw](https://www.anchorterminal.com/compare/leon-vs-zeroclaw.md) - [Leon vs Zo Computer](https://www.anchorterminal.com/compare/leon-vs-zo-computer.md) - [asaply vs Leon](https://www.anchorterminal.com/compare/asaply-vs-leon.md) - [Brea vs Leon](https://www.anchorterminal.com/compare/brea-vs-leon.md) - [Del vs Leon](https://www.anchorterminal.com/compare/del-vs-leon.md) - [HireAlpha vs Leon](https://www.anchorterminal.com/compare/hirealpha-vs-leon.md) - [Leon vs Natura tinyNature](https://www.anchorterminal.com/compare/leon-vs-natura.md) - [Leon vs Orbits](https://www.anchorterminal.com/compare/leon-vs-orbits.md) - [Leon vs Orchid](https://www.anchorterminal.com/compare/leon-vs-orchid-ai.md) - [Leon vs Pally](https://www.anchorterminal.com/compare/leon-vs-pally.md) - [Leon vs szn](https://www.anchorterminal.com/compare/leon-vs-szn.md) - [Leon vs Tomo](https://www.anchorterminal.com/compare/leon-vs-tomo.md) - [Leon vs Wajo (Fo)](https://www.anchorterminal.com/compare/leon-vs-wajo.md) - [Leon vs Zapia](https://www.anchorterminal.com/compare/leon-vs-zapia.md) - [asaply vs Atticus](https://www.anchorterminal.com/compare/asaply-vs-atticus.md) - [Asmi vs Atticus](https://www.anchorterminal.com/compare/asmi-vs-atticus.md) - [Asmi vs Leon](https://www.anchorterminal.com/compare/asmi-vs-leon.md) - [Atticus vs Boba](https://www.anchorterminal.com/compare/atticus-vs-boba.md) - [Atticus vs Boski](https://www.anchorterminal.com/compare/atticus-vs-boski.md) - [Atticus vs Brea](https://www.anchorterminal.com/compare/atticus-vs-brea.md) - [Atticus vs Caddy](https://www.anchorterminal.com/compare/atticus-vs-caddy-app.md) - [Atticus vs CowAgent](https://www.anchorterminal.com/compare/atticus-vs-cowagent.md) - [Atticus vs Del](https://www.anchorterminal.com/compare/atticus-vs-del.md) - [Atticus vs folk](https://www.anchorterminal.com/compare/atticus-vs-folk-nozomio.md) - [Atticus vs GAIA](https://www.anchorterminal.com/compare/atticus-vs-gaia.md) - [Atticus vs Gemini Spark](https://www.anchorterminal.com/compare/atticus-vs-gemini-spark.md) - [Atticus vs Grok Bot](https://www.anchorterminal.com/compare/atticus-vs-grok-bot.md) - [Atticus vs Haven](https://www.anchorterminal.com/compare/atticus-vs-haven.md) - 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[Atticus vs Orchid](https://www.anchorterminal.com/compare/atticus-vs-orchid-ai.md) - [Atticus vs Pally](https://www.anchorterminal.com/compare/atticus-vs-pally.md) - [Atticus vs PicoClaw](https://www.anchorterminal.com/compare/atticus-vs-picoclaw.md) - [Atticus vs Poke](https://www.anchorterminal.com/compare/atticus-vs-poke.md) - [Atticus vs QwenPaw](https://www.anchorterminal.com/compare/atticus-vs-qwenpaw.md) - [Atticus vs szn](https://www.anchorterminal.com/compare/atticus-vs-szn.md) - [Atticus vs Tab](https://www.anchorterminal.com/compare/atticus-vs-tab-bot.md) - [Atticus vs Talorys](https://www.anchorterminal.com/compare/atticus-vs-talorys.md) - [Atticus vs Tomo](https://www.anchorterminal.com/compare/atticus-vs-tomo.md) - [Atticus vs Town](https://www.anchorterminal.com/compare/atticus-vs-town.md) - [Atticus vs Wajo (Fo)](https://www.anchorterminal.com/compare/atticus-vs-wajo.md) - [Atticus vs Zapia](https://www.anchorterminal.com/compare/atticus-vs-zapia.md) - [Atticus vs ZeroClaw](https://www.anchorterminal.com/compare/atticus-vs-zeroclaw.md) - 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