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LeanWarp vs Harness Kit

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

LeanWarp compared with Harness Kit
DetailLeanWarp logo LeanWarpHarness Kit logo Harness Kit
What it doesHosted Lean 4 API for proof agents A harness-agnostic framework for AI coding tools
StageMVP Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelPaid Open source
PricingStarting at $0.000278 per second of worker time (including idle time, increasing with CPU and RAM usage). $10 minimum credit purchase. $10 free credit for new accounts with verified email while launch offer lasts. Not given
Key featuresNot given
  • 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
What makes it different
  • Mathlib preloaded in pinned environments
  • Multiple API interfaces (CLI, MCP, Python, HTTP)
  • Kernel-verified proofs with no axioms allowed
  • Draft checking for iterative development
  • 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
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)Not checked yet no change since last check16 no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)020
Referring domains (Majestic)011

3 details filled in for both companies.

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