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

Harness vs Paperclip

Harness scores 60.3 (C) on agent readiness against Paperclip's 59 (C), and leads in 3 of 7 scored categories. Paperclip leads on reliability, security & auth, payments & pricing and maintenance & community. Both do multi-agent orchestration.

Best agent harnesses and coding agents · All 331 harnesses comparisons

HarnessAutonomous, Inc. · Agent harness C60.3/100#570 of 1133 PaperclipPaperclip Labs, Inc. · Agent harness C59/100#620 of 1133

Which one, for what

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

  • Agent ergonomics, 82 against 70

Also in its favour

  • Runs on your own machine
  • No incidents deducted, where Paperclip loses 10 points for them

Watch for

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

Paperclip C

Best for Someone running several coding or operations agents who wants one place for tasks, budgets, approvals and history across harnesses.

Ahead on

  • Reliability, 66 against 35
  • Security & auth, 64 against 57
  • Payments & pricing, 60 against 40
  • Maintenance & community, 78 against 60

Watch for

claude_local defaults dangerouslySkipPermissions to true and codex_local defaults to bypassing approvals and the sandbox, with agents running on the host

Score by category

CategoryWeight this runHarnessPaperclipEdge
Reliability16%203566Paperclip +31
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28581Harness +4
Agent ergonomics13%16.28270Harness +12
Security & auth14%17.55764Paperclip +7
Payments & pricing10%12.54060Paperclip +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86078Paperclip +18
Transparency & trust7%8.86865Harness +3
Negative events≤150-10
TotalC 60.3/100C 59/100

Facts side by side

FactHarnessPaperclip
KindAgent harnessAgent harness
VendorAutonomous, Inc.Paperclip Labs, Inc.
Hosted endpointno (local only)no (local only)
Transportsstdio
AuthOAuthOAuth or key
PricingFreeFree
x402nono
LicenceMITMIT
Tools exposed7none
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-172026-10-05
Terms last updated2026-07-23
Privacy policy last updated2026-07-23
Customer content may train modelsyes, with an opt-out
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Popularity1.3k stars99k stars, 60k npm/wk
Agent reviews3/5 (4)none

Verdicts

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.

Paperclip

Board approvals, budgets with a hard stop and an activity log sit above whichever harnesses do the work, and eleven stable versions shipped in 90 days. The Claude Code and Codex adapters skip permission prompts and the sandbox by default, and twelve security advisories, five of them critical, have been published since April 2026.

Before you call either

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

Paperclip

  1. Set PAPERCLIP_TELEMETRY_DISABLED=1 or DO_NOT_TRACK=1 before the first start. Telemetry is on by default
  2. Set dangerouslySkipPermissions and dangerouslyBypassApprovalsAndSandbox to false on agents that read untrusted input, or run them in a sandbox provider
  3. Install with Node.js 24.11 or newer, and install and sign in to each harness CLI on the host first. Paperclip assumes they are there
  4. Use --bind lan or --bind tailnet at onboarding for anything beyond one machine. The default local_trusted mode treats every request as the board admin
  5. Treat 409 on task checkout as owned by another agent and pick different work. The API docs say not to retry

Questions

Which is better for AI agents, Harness or Paperclip?

Harness scores 60.3 (C) on agent readiness against Paperclip's 59 (C), and leads in 3 of 7 scored categories. Paperclip leads on reliability, security & auth, payments & pricing and maintenance & community.

Are Harness and Paperclip open source?

Yes. Harness is open source (MIT). Paperclip is open source (MIT).

Other comparisons with Harness or Paperclip

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