Comet vs Harny
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Comet compared with Harny
| Detail | 
Comet | 
Harny |
|---|
| What it does | The AI Developer Platform
| Agent harness infrastructure that gives AI agents memory for each user, connected accounts, action limits and an audit record.
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| Stage | Not given
| Not given
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| Founded | 2017
| Not given
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| Based in | US
| CA
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| Pricing model | Not given
| Freemium
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| Pricing | Not given
| Free: first 500 monthly-active end users per month, free forever. Paid: $0.30 per monthly-active end user above 500, billed monthly.
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| Key features | - LLM trace logging with 40+ integrations
- Automatic error detection and diagnostics
- Ollie agent for code fix recommendations
- Test Suites and 40+ LLM-as-a-judge evaluation metrics
- Production dashboards and alerts for agents
- Prompt playground and optimization
- Agent Playground for local agent development
- Cost intelligence for Claude Code and Codex tracking
| - Timestamped memory ingestion with backdating capability
- Per-user data isolation and privacy scoping
- Ranked memory recall with dated evidence
- Connected accounts integration per user
- Long-running agent jobs with folder-level operations
- Configurable token ceiling per API call
- Enforced action limits on agent operations
- Complete action audit trail with hash chaining
- MCP server integration for Claude and other clients
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| What makes it different | - Truly open-source platform with enterprise-grade infrastructure
- Traces appear almost instantly even at high volumes
- Flexible hosting options including self-hosted, cloud, and custom deployments
- Easy integration with just a few lines of code
- Opik automatically turns trace data and eval results into code fixes
| - Highest published BEAM benchmark score at 128K tokens: 85.1, compared to competing memory systems
- 98% fewer tokens required than raw tool output, making responses 4× cheaper
- Works with 20+ agent frameworks including LangChain, LangGraph and LlamaIndex
- First 500 monthly-active end users free forever
- Per-person billing model scales with user growth, not API calls
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 74 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 28 | 0 |
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| Citation Flow (Majestic) | 51 | 0 |
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| Referring domains (Majestic) | 4448 | 1 |
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4 details filled in for both companies.
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