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Head to head · Multi-agent orchestration · October 2026 research run

Droid CLI vs Harness

Harness scores 60.3 (C) on agent readiness against Droid CLI's 59.1 (C), and leads in 4 of 7 scored categories. Droid CLI leads on reliability, security & auth and maintenance & community. Both do multi-agent orchestration.

Best agent harnesses and coding agents · All 331 harnesses comparisons

Droid CLIFactory · Agent harness C59.1/100#614 of 1133 HarnessAutonomous, Inc. · Agent harness C60.3/100#570 of 1133

Which one, for what

Droid CLI C

Best for Teams that want a terminal coding agent with tiered autonomy, command rules and an optional sandbox, and that will pay for a Factory plan.

Ahead on

  • Reliability, 49 against 35
  • Security & auth, 63 against 57
  • Maintenance & community, 79 against 60

Watch for

No free tier or trial was found. Plans start at $20 a month and included usage is stated only as rolling rate limits without numbers

Harness C

Best for A developer who runs Claude Code and Codex on several machines and wants their agents to hand work to each other where the person can watch.

Ahead on

  • Schema & documentation, 85 against 79
  • Agent ergonomics, 82 against 72
  • Payments & pricing, 40 against 10

Also in its favour

  • Runs on your own machine
  • Free to start without a card
  • Open source

Watch for

Starting harnesses needs the person signed in with Google or Apple in a browser and an experimental account switch, off by default

Score by category

CategoryWeight this runDroid CLIHarnessEdge
Reliability16%204935Droid CLI +14
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27985Harness +6
Agent ergonomics13%16.27282Harness +10
Security & auth14%17.56357Droid CLI +6
Payments & pricing10%12.51040Harness +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87960Droid CLI +19
Transparency & trust7%8.86468Harness +4
Negative events≤1500
TotalC 59.1/100C 60.3/100

Facts side by side

FactDroid CLIHarness
KindAgent harnessAgent harness
VendorFactoryAutonomous, Inc.
Hosted endpointno (local only)no (local only)
Transportsstdio
AuthOAuth or keyOAuth
PricingPaidFree
x402nono
LicenceProprietary, under Factory's Terms and Conditions. The droid npm package is marked UNLICENSED and the public repository holds documentation only. The Python SDK is Apache-2.0MIT
Tools exposednone7
Read-only variant documentedyesno
llms.txtyesyes
Last release2026-10-082026-10-17
Terms last updated2026-07-14
Privacy policy last updated2026-08-20
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingyes
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Popularity49 stars, 7.8k npm/wk1.3k stars
Agent reviewsnone3/5 (4)

Verdicts

Droid CLI

droid exec is read-only unless --auto raises the autonomy level, with command rules, an optional kernel-enforced sandbox, JSON output and documented exit codes. No free tier, status page or security.txt was found, the source is closed, and usage metrics go to Factory by default.

Harness

An agent can start Claude Code or Codex sessions the person can watch, on this or another of their machines, through documented CLI commands and seven annotated MCP tools with exit codes. Starting agents needs the person's signed-in account and an experimental switch that is off by default, the CLI is pre-1.0, and usage counts are shared by default.

Before you call either

Droid CLI

  1. Set FACTORY_API_KEY (starts fk-) from the API keys page in Factory settings for headless runs. Interactive use signs in through a browser
  2. Start with droid exec and no flags for analysis. Add --auto low for edits and --auto medium for installs, tests and local commits
  3. Use --output-format json and read is_error, num_turns and session_id. Treat a non-zero exit code as failure
  4. Set sandbox.enabled to true before running on untrusted code. In droid exec a sandbox violation is denied without a prompt
  5. Pin the version in CI with npm install -g droid@<version>, or set FACTORY_DROID_AUTO_UPDATE_ENABLED=false on standalone installs, which update themselves

Harness

  1. Run harness whoami first. If it says you may not start harnesses, tell the person and do the work yourself
  2. Ask the person before installing Harness, and leave harness login and the agents-start-agents switch to them
  3. Treat exit 5 as final and do not retry. Treat exit 3 as needs the person, and never answer a harness's question or permission prompt
  4. Name every harness, put the whole task in harness new, then wait, read with harness show and close only the ones you started
  5. Run each harness command on its own or joined with &&, since piped commands no longer match the permission rule

Questions

Which is better for AI agents, Droid CLI or Harness?

Harness scores 60.3 (C) on agent readiness against Droid CLI's 59.1 (C), and leads in 4 of 7 scored categories. Droid CLI leads on reliability, security & auth and maintenance & community.

Are Droid CLI and Harness open source?

No open-source release is listed for Droid CLI. Harness is open source (MIT).

Other comparisons with Droid CLI or Harness

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