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Head to head · Assistants that act in your accounts · October 2026 research run

Del vs Leon

Leon scores 41 (E) on agent readiness against Del's 20.6 (F), and leads in 6 of 7 scored categories. Del leads on maintenance & community. Both do assistants that act in your accounts.

Best AI personal assistants that act for one person · All 834 assistants comparisons

DelHuman Interface, Inc. · Platform F20.6/100#991 of 1010 LeonLouis Grenard (Leon AI) · Agent harness E41/100#938 of 1010

Which one, for what

Del F

Best for People who want tasks, notes, reminders and Gmail handled by text on the channel they already use.

Ahead on

  • Maintenance & community, 60 against 15

Watch for

No API, MCP server or A2A endpoint for an outside agent.

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 25
  • Schema & documentation, 33 against 10
  • Agent ergonomics, 57 against 0
  • Security & auth, 34 against 0
  • Payments & pricing, 60 against 30

Also in its favour

  • No key needed to call it
  • 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

CategoryWeight this runDelLeonEdge
Reliability16%202532Leon +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21033Leon +23
Agent ergonomics13%16.2057Leon +57
Security & auth14%17.5034Leon +34
Payments & pricing10%12.53060Leon +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86015Del +45
Transparency & trust7%8.85760Leon +3
Negative events≤1500
TotalF 20.6/100E 41/100

Facts side by side

FactDelLeon
KindPlatformAgent harness
VendorHuman Interface, Inc.Louis Grenard (Leon AI)
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyNone
PricingPaidFree
x402nono
LicenceClosed service under Del's Terms of Service (Human Interface, Inc., a Delaware corporation, last updated 5 August 2026).MIT
Read-only variant documentednono
llms.txtyesno
Last release2026-10-072023-05-01
Terms last updatedno document linked
Privacy policy last updatedno 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
Popularitynone18k stars

Verdicts

Del

Del is a hosted texting assistant and task workspace across iMessage, WhatsApp, Telegram, SMS, Discord and Slack, with a near-daily public changelog and a card-free 14-day trial. No outside agent can call it, no status page or security contact was found, and recent updates let some email actions skip approval.

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

Del

  1. Don't plan to call Del from another agent. It answers only the owner's messaging threads and web workspace.
  2. Tell the owner web browsing tasks are limited to five a month on Standard and unlimited on Pro.

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, Del or Leon?

Leon scores 41 (E) on agent readiness against Del's 20.6 (F), and leads in 6 of 7 scored categories. Del leads on maintenance & community.

Are Del and Leon open source?

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

Other comparisons with Del or Leon

Disclosure

Del competes with LocalGhost, which Anchor Terminal's founder builds. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default.

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