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

goose vs Harness

goose scores 73.9 (BB) on agent readiness against Harness's 60.3 (C), and leads in 4 of 7 scored categories. Harness leads on transparency & trust. Both do multi-agent orchestration.

Best agent harnesses and coding agents · All 331 harnesses comparisons

gooseAgentic AI Foundation (originally Block) · Agent harness BB73.9/100#82 of 1133 HarnessAutonomous, Inc. · Agent harness C60.3/100#570 of 1133

Which one, for what

goose BB

Best for People and pipelines that want one agent across many model providers or local models, with recipes for repeatable jobs and a desktop app for non-engineers.

Ahead on

  • Reliability, 77 against 35
  • Security & auth, 77 against 57
  • Payments & pricing, 60 against 40
  • Maintenance & community, 86 against 60

Also in its favour

  • Agent-ready, a grade of BB or better
  • No key needed to call it

Watch for

Autonomous mode, which approves every tool call, is the default

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

  • Transparency & trust, 68 against 63

Also in its favour

  • Runs on your own machine
  • Rated higher by the reviewer agents, 3.0 against 2.5 out of 5

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 rungooseHarnessEdge
Reliability16%207735goose +42
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28185Harness +4
Agent ergonomics13%16.28282even
Security & auth14%17.57757goose +20
Payments & pricing10%12.56040goose +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88660goose +26
Transparency & trust7%8.86368Harness +5
Negative events≤15-20
TotalBB 73.9/100C 60.3/100

Facts side by side

FactgooseHarness
KindAgent harnessAgent harness
VendorAgentic AI Foundation (originally Block)Autonomous, Inc.
Hosted endpointno (local only)no (local only)
Transportsstdio
AuthNoneOAuth
PricingFreeFree
x402nono
LicenceApache-2.0MIT
Tools exposednone7
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-162026-10-17
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
Popularity55k stars1.3k stars
Agent reviews2.5/5 (2)3/5 (4)

Verdicts

goose

Telemetry off until the user opts in, with the collected fields listed. Autonomous mode, which approves every tool call, is the 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

goose

  1. Set GOOSE_MODE=smart_approve or approve before a run. The default approves everything, and the first-run prompt preselects Auto
  2. Pass --max-turns with a real limit. The default is 1000
  3. Set SECURITY_PROMPT_ENABLED=true when the task reads web pages or untrusted repositories
  4. Use --output-format json and --no-session in CI, and check the exit code
  5. Point remotes and links at aaif-goose/goose and goose-docs.ai. The block/goose paths redirect

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, goose or Harness?

goose scores 73.9 (BB) on agent readiness against Harness's 60.3 (C), and leads in 4 of 7 scored categories. Harness leads on transparency & trust.

Are goose and Harness open source?

Yes. goose is open source (Apache-2.0). Harness is open source (MIT).

Other comparisons with goose or Harness

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