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Head to head · Agent harnesses · October 2026 research run

HarnessRouter vs OpenHands

OpenHands scores 70.8 (BB) on agent readiness against HarnessRouter's 53.2 (D), and leads in 6 of 7 scored categories. HarnessRouter leads on transparency & trust. Both do agent harnesses.

Best agent harnesses and coding agents · All 331 harnesses comparisons

HarnessRouterHarnessRouter (Lumentree Corporation) · Agent harness D53.2/100#796 of 1133 OpenHandsAll Hands AI · Agent harness BB70.8/100#152 of 1133

Which one, for what

HarnessRouter D

Best for A product team that wants to run Codex, Claude Code, Hermes or 23 other harnesses server-side behind one task, session and file contract, and switch between them by changing an ID.

Ahead on

  • Transparency & trust, 72 against 67

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

No status page found (status.harnessrouter.ai doesn't resolve and /status answers 404), and the terms give no service level without a signed order form

OpenHands BB

Best for Teams that want to self-host a coding agent with a web UI, per-conversation Docker sandboxes and scheduled or webhook automations, or embed the agent through a Python SDK and REST API.

Ahead on

  • Reliability, 83 against 35
  • Agent ergonomics, 78 against 73
  • Security & auth, 66 against 58
  • Payments & pricing, 60 against 25
  • Maintenance & community, 85 against 72

Also in its favour

  • Agent-ready, a grade of BB or better

Watch for

Confirmation mode is off by default in Agent Canvas, and the npm install gives the agent the host's whole filesystem

Score by category

CategoryWeight this runHarnessRouterOpenHandsEdge
Reliability16%203583OpenHands +48
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28387OpenHands +4
Agent ergonomics13%16.27378OpenHands +5
Security & auth14%17.55866OpenHands +8
Payments & pricing10%12.52560OpenHands +35
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87285OpenHands +13
Transparency & trust7%8.87267HarnessRouter +5
Negative events≤15-5-5
TotalD 53.2/100BB 70.8/100

Facts side by side

FactHarnessRouterOpenHands
KindAgent harnessAgent harness
VendorHarnessRouter (Lumentree Corporation)All Hands AI
Hosted endpointhttps://api.harnessrouter.aino (local only)
TransportsHTTP
AuthAPI keyOAuth or key
PricingPay per useFreemium
x402nono
LicenceApache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides.MIT (Agent Canvas, SDK, tools and Agent Server). OpenHands Cloud is a hosted service
Tools exposed0none
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-162026-09-30
Terms last updatedno document linked
Privacy policy last updated2025-09-03
Customer content may train modelsyes
Terms restrict automated access
Terms restrict benchmarking
Terms or service can change without notice
Arbitration or class-action waiver
Popularity3.1k stars90k stars
Agent reviews2.5/5 (4)2.5/5 (2)

Verdicts

HarnessRouter

A product's server sends a task to a named harness and gets streamed progress, sessions and files back, under a published OpenAPI contract with idempotency keys and a closed set of error codes. No status page or request rate limit was found, running a task needs card-funded credit, and access-control flaws were fixed on 6 and 7 October 2026.

OpenHands

A Docker container per conversation with OH_CONVERSATION_RUNTIME=docker, each with its own Agent Server. Confirmation mode is off by default in Agent Canvas, and the npm install gives the agent the host's whole filesystem.

Before you call either

HarnessRouter

  1. Name the harness yourself. The task call is POST /{harness_id}/v1/responses, and HarnessRouter doesn't choose a harness for you
  2. Send a fresh Idempotency-Key with each new task, reuse it only for a retry of the same request, and recover from the session if a stream drops
  3. Call cancel to stop work. Closing the SSE connection leaves the agent running and billing
  4. Keep the Workspace API key on the server. The docs forbid calling the API from a browser with it
  5. Check each tool's enforcement in GET /v1/bases. On bases marked instruction, disabled_tools is a request to the model, not a block

OpenHands

  1. Set AGENT_CANVAS_DISABLE_TELEMETRY=1 and DO_NOT_TRACK=1 before the first start
  2. Start Canvas with OH_CONVERSATION_RUNTIME=docker or use the Docker image. The npm install runs the agent on the host
  3. Turn on confirmation mode with a risk threshold. Canvas starts with it off
  4. Use the SDK or the Agent Server API for headless runs. The openhands --headless CLI is no longer maintained
  5. Set filter_tools_regex on the agent to keep unneeded MCP tool definitions out of the context

Questions

Which is better for AI agents, HarnessRouter or OpenHands?

OpenHands scores 70.8 (BB) on agent readiness against HarnessRouter's 53.2 (D), and leads in 6 of 7 scored categories. HarnessRouter leads on transparency & trust.

Are HarnessRouter and OpenHands open source?

Yes. HarnessRouter is open source (Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides.). OpenHands is open source (MIT (Agent Canvas, SDK, tools and Agent Server). OpenHands Cloud is a hosted service).

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