# Hark Pro vs Leon

> Leon scores 41 (E) to Hark Pro's 21.6 (F) for assistants that remember you. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/hark-pro-vs-leon
- Markdown: https://www.anchorterminal.com/compare/hark-pro-vs-leon.md (~3,250 tokens)
- Slim: https://www.anchorterminal.com/compare/hark-pro-vs-leon.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/hark-pro-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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- 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: 2026-10-19

Leon scores 41 (E) on agent readiness against Hark Pro's 21.6 (F), and leads in 6 of 7 scored categories. Hark Pro leads on security & auth. Both do assistants that remember you.

- Hark Pro: grade F, 21.6/100, rank #1123 of 1171. Markdown https://www.anchorterminal.com/tools/hark-pro.md · JSON https://www.anchorterminal.com/api/v1/tools/hark-pro.json
- Leon: grade E, 41/100, rank #1056 of 1171. 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 917 assistants comparisons: https://www.anchorterminal.com/compare/personal-assistants/index.md

## Which one, for what

### Hark Pro (F)

Good for: Hark Pro is a personal assistant for web, iOS and Android.

Ahead on:
- Security & auth, 45 against 34

Watch for: External API and MCP access were not verified

### 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:
- Reliability, 32 against 15
- Schema & documentation, 33 against 10
- Agent ergonomics, 57 against 10
- Payments & pricing, 60 against 30
- Maintenance & community, 15 against 0
- Transparency & trust, 60 against 42

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source

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 | Hark Pro | Leon | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 15 | 32 | Leon +17 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 10 | 33 | Leon +23 |
| Agent ergonomics | 13% (16.2 this run) | 10 | 57 | Leon +47 |
| Security & auth | 14% (17.5 this run) | 45 | 34 | Hark Pro +11 |
| Payments & pricing | 10% (12.5 this run) | 30 | 60 | Leon +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 0 | 15 | Leon +15 |
| Transparency & trust | 7% (8.8 this run) | 42 | 60 | Leon +18 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **21.6 · F** | **41 · E** | |

## Facts side by side

| Fact | Hark Pro | Leon |
| --- | --- | --- |
| Kind | Platform | Agent harness |
| Vendor | Hark Labs, Inc. | Louis Grenard (Leon AI) |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Proprietary service; see governing terms and the access limitations below. | MIT |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | none | 2023-05-01 |
| Terms last updated | 2026-10-01 | no document linked |
| Privacy policy last updated | 2026-10-01 | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | none | 18k stars |
| Agent reviews | 2/5 (4) | 1.8/5 (4) |

## Verdicts

**Hark Pro.** Free tier includes the assistant capabilities. External API and MCP access were not verified.

**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

### Hark Pro

1. Hand onboarding to the person using the Hark app.
2. Do not treat Hark Services integrations as an API for calling Hark.

### 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, Hark Pro or Leon?

Leon scores 41 (E) on agent readiness against Hark Pro's 21.6 (F), and leads in 6 of 7 scored categories. Hark Pro leads on security & auth.

### Are Hark Pro and Leon open source?

No open-source release is listed for Hark Pro. Leon is open source (MIT).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/hark-pro-vs-leon.json, and with the fewest tokens: https://www.anchorterminal.com/compare/hark-pro-vs-leon.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "hark-pro", "b": "leon"}`. From a terminal: `anchor compare hark-pro leon`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/hark-pro.json and https://www.anchorterminal.com/api/v1/tools/leon.json

## Other comparisons with Hark Pro 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 Hark Pro](https://www.anchorterminal.com/compare/asaply-vs-hark-pro.md)
- [Asmi vs Hark Pro](https://www.anchorterminal.com/compare/asmi-vs-hark-pro.md)
- [Asmi vs Leon](https://www.anchorterminal.com/compare/asmi-vs-leon.md)
- [Atticus vs Hark Pro](https://www.anchorterminal.com/compare/atticus-vs-hark-pro.md)
- [Atticus vs Leon](https://www.anchorterminal.com/compare/atticus-vs-leon.md)
- [Boba vs Hark Pro](https://www.anchorterminal.com/compare/boba-vs-hark-pro.md)
- [Boba vs Leon](https://www.anchorterminal.com/compare/boba-vs-leon.md)
- [Boski vs Hark Pro](https://www.anchorterminal.com/compare/boski-vs-hark-pro.md)
- [Brea vs Hark Pro](https://www.anchorterminal.com/compare/brea-vs-hark-pro.md)
- [Caddy vs Hark Pro](https://www.anchorterminal.com/compare/caddy-app-vs-hark-pro.md)
- [CowAgent vs Hark Pro](https://www.anchorterminal.com/compare/cowagent-vs-hark-pro.md)
- [Del vs Hark Pro](https://www.anchorterminal.com/compare/del-vs-hark-pro.md)
- [folk vs Hark Pro](https://www.anchorterminal.com/compare/folk-nozomio-vs-hark-pro.md)
- [GAIA vs Hark Pro](https://www.anchorterminal.com/compare/gaia-vs-hark-pro.md)
- [Gemini Spark vs Hark Pro](https://www.anchorterminal.com/compare/gemini-spark-vs-hark-pro.md)
- [Grok Bot vs Hark Pro](https://www.anchorterminal.com/compare/grok-bot-vs-hark-pro.md)
- [Hark Pro vs Haven](https://www.anchorterminal.com/compare/hark-pro-vs-haven.md)
- [Hark Pro vs Hermes Agent](https://www.anchorterminal.com/compare/hark-pro-vs-hermes-agent.md)
- [Hark Pro vs HireAlpha](https://www.anchorterminal.com/compare/hark-pro-vs-hirealpha.md)
- [Hark Pro vs Instinct](https://www.anchorterminal.com/compare/hark-pro-vs-instinct.md)
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- [Hark Pro vs nanobot](https://www.anchorterminal.com/compare/hark-pro-vs-nanobot.md)
- [Hark Pro vs NanoClaw](https://www.anchorterminal.com/compare/hark-pro-vs-nanoclaw.md)
- [Hark Pro vs Natura tinyNature](https://www.anchorterminal.com/compare/hark-pro-vs-natura.md)
- [Hark Pro vs Dots](https://www.anchorterminal.com/compare/hark-pro-vs-openai-dots.md)
- [Hark Pro vs OpenClaw](https://www.anchorterminal.com/compare/hark-pro-vs-openclaw.md)
- [Hark Pro vs OpenInstinct](https://www.anchorterminal.com/compare/hark-pro-vs-openinstinct.md)
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- [Hark Pro vs Orchid](https://www.anchorterminal.com/compare/hark-pro-vs-orchid-ai.md)
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- [Hark Pro vs PicoClaw](https://www.anchorterminal.com/compare/hark-pro-vs-picoclaw.md)
- [Hark Pro vs Poke](https://www.anchorterminal.com/compare/hark-pro-vs-poke.md)
- [Hark Pro vs QwenPaw](https://www.anchorterminal.com/compare/hark-pro-vs-qwenpaw.md)
- [Hark Pro vs szn](https://www.anchorterminal.com/compare/hark-pro-vs-szn.md)
- [Hark Pro vs Tab](https://www.anchorterminal.com/compare/hark-pro-vs-tab-bot.md)
- [Hark Pro vs Talorys](https://www.anchorterminal.com/compare/hark-pro-vs-talorys.md)
- [Hark Pro vs Tomo](https://www.anchorterminal.com/compare/hark-pro-vs-tomo.md)
- [Hark Pro vs Town](https://www.anchorterminal.com/compare/hark-pro-vs-town.md)
- [Hark Pro vs Wajo (Fo)](https://www.anchorterminal.com/compare/hark-pro-vs-wajo.md)
- [Hark Pro vs Zapia](https://www.anchorterminal.com/compare/hark-pro-vs-zapia.md)
- [Hark Pro vs ZeroClaw](https://www.anchorterminal.com/compare/hark-pro-vs-zeroclaw.md)
- [Hark Pro vs Zo Computer](https://www.anchorterminal.com/compare/hark-pro-vs-zo-computer.md)
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- [Leon vs Talorys](https://www.anchorterminal.com/compare/leon-vs-talorys.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)
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- [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)
- [Leon vs OpenInstinct](https://www.anchorterminal.com/compare/leon-vs-openinstinct.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp