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Harness Kit vs modelmile

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Harness Kit compared with modelmile
DetailHarness Kit logo Harness Kitmodelmile logo modelmile
What it doesA harness-agnostic framework for AI coding tools Claude Code plugin that automatically selects the optimal model and effort level for each message to reduce costs
StageNot given Not given
FoundedNot given Not given
Based inNot given MA
Pricing modelOpen source Freemium
PricingNot given Free plan: 22 messages. Starter: $6/month for 150 messages (4¢ per message). Pro: $19/month for 1,200 messages (1.58¢ per message). Team Finance: $49/month for 3,500 messages (1.40¢ per message). Max XL: $99/month for 8,000 messages (1.24¢ per message). Top-ups: $0.01 per message with subscription (
Key features
  • Configure plugins, skills, MCP servers, and hooks in a single harness.yaml file
  • Observatory: monitor every session, tool call, and minute of activity
  • Memory: persistent knowledge graph for AI orientation
  • Comparator: run prompts across Claude Code, Cursor, and Copilot side by side
  • Import existing configs from multiple AI coding tools automatically
  • Share complete setup via single file with teammates
  • Harness Parity: verify all connected AI tools end up with identical configuration
  • Cross-harness compatibility table showing actual tool capabilities
  • Automatic model and effort selection based on task type
  • Local analysis with no data sent to servers
  • Local log showing all decisions with reasons
  • Pause and resume commands for manual control
  • View plugin state and decision history with commands
What makes it different
  • Import-first approach: reads existing configs from all your tools and converges them before you write YAML
  • No marketing gloss: capability table generated at build time from actual adapter code, not hand-maintained
  • Portable across tools: single harness.yaml travels with you to every machine and tool
  • Open source and free: no cost beyond existing Claude subscription
  • Based on open specification: Harness Protocol is vendor-neutral and JSON Schema validated
  • Reduces Claude Code bill by 65% without changing how you work
  • Haiku costs forty times less than Opus for the same quality
  • Every decision is recorded and auditable in a local log
  • Respects manual model choices and gives full user control
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)16 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)200
Referring domains (Majestic)110

4 details filled in for both companies.

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