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Head to head · Assistant proactive · October 2026 research run

Leon vs Lindy

Leon scores 41 (E) on agent readiness against Lindy's 32.3 (F), and leads in 6 of 7 scored categories. Lindy leads on security & auth. Both do assistant proactive.

Best AI personal assistants that act for one person · All 190 assistants comparisons

LeonLouis Grenard (Leon AI) · Agent harness E41/100#934 of 986 LindyCrivello Corp (doing business as Lindy) · Platform F32.3/100#968 of 986

Which one, for what

Leon E

Best 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 24
  • Agent ergonomics, 57 against 43
  • Payments & pricing, 60 against 35
  • Maintenance & community, 15 against 9
  • Transparency & trust, 60 against 52

Also in its favour

  • No key needed to call it
  • Open source
  • No incidents deducted, where Lindy loses 3 points for them

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

Lindy F

Best for Lindy suits a person or small team that lives in Slack and Google or Microsoft mail and wants briefs, drafts, scheduling and meeting notes done on a schedule.

Ahead on

  • Security & auth, 49 against 34

Watch for

The integrations page says approval settings apply in shared Slack threads only. Web chat, Slack direct messages, iMessage and SMS are not covered, and reads are never covered.

Score by category

CategoryWeight this runLeonLindyEdge
Reliability16%203224Leon +8
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.23332Leon +1
Agent ergonomics13%16.25743Leon +14
Security & auth14%17.53449Lindy +15
Payments & pricing10%12.56035Leon +25
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8159Leon +6
Transparency & trust7%8.86052Leon +8
Negative events≤150-3
TotalE 41/100F 32.3/100

Facts side by side

FactLeonLindy
KindAgent harnessPlatform
VendorLouis Grenard (Leon AI)Crivello Corp (doing business as Lindy)
Hosted endpointno (local only)no (local only)
Transports
AuthNoneOAuth
PricingFreePaid
x402nono
LicenceMITProprietary service under Lindy's Terms of Service. No source is published
Read-only variant documentednono
llms.txtnoyes
Last release2023-05-012025-10-21
Terms last updatedno document linked2026-09-24
Privacy policy last updatedno document linked2026-09-28
Customer content may train modelsnot found in the text
Terms restrict automated accessyes
Terms restrict benchmarkingyes
Terms or service can change without noticeyes
Arbitration or class-action waiveryes
Popularity18k starsnone

Verdicts

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.

Lindy

Lindy keeps what it remembers in files the owner can read and edit, and publishes credit prices. Its approval setting applies in shared Slack threads only, so writes asked for by direct message, text or web chat run unasked, which its pricing page does not say. It has no status page, and its changelog stops in October 2025.

Before you call either

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

Lindy

  1. Treat a request sent by direct message, text or web chat as unguarded. Approval prompts appear in shared Slack threads only.
  2. Run a routine as a dry run before turning it on. A dry run reads real data and sends, posts and writes nothing.
  3. Turn off unused tools after adding an MCP server. Every supported tool arrives switched on, and a large server adds more than a hundred.
  4. Expect a billed seat for anyone who mentions Lindy in Slack. A teammate who joins that way has seven free days first.
  5. Connect only hosted MCP servers on public HTTPS with streamable HTTP, the one kind the docs describe.

Questions

Which is better for AI agents, Leon or Lindy?

Leon scores 41 (E) on agent readiness against Lindy's 32.3 (F), and leads in 6 of 7 scored categories. Lindy leads on security & auth.

Are Leon and Lindy open source?

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

Other comparisons with Leon or Lindy

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