| What it does | The agent observability and evaluation platform.
| One free key. Dozens of AI models.
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| Stage | Established
| Beta
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| Founded | Not given
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| Based in | Not given
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| Pricing model | freemium
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| Key features | - Trace observability with OpenTelemetry compliance
- Comprehensive evaluation framework for span, trace, and session evals
- Alyx AI engineering agent for debugging and fixing issues
- Agent-first debugging for coding agents
- ADB datastore for GenAI traces in open formats
- Phoenix open-source platform for local-first tracing and evaluation
- Online evaluations on production traces
- Integration with 40+ models, frameworks, and AI tools
- Built on OpenInference and OpenTelemetry standards
- Certified security and compliance including SOC 2, ISO, PCI, GDPR, HIPAA
| - OpenAI-compatible API
- Free models with call limits
- Browser chat interface
- Credit-based billing for premium models
- Integration with multiple tools
- Daily check-in credits
- No-expiry purchased credits
- Code examples for multiple languages
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| What makes it different | - Built by founders of OpenInference, the leading open standard for GenAI observability
- Signal surfaces what matters, uncovers root causes, and generates review-ready fixes automatically
- Processes 1 trillion spans and runs 1 billion evals per year at scale
- Flexible deployment with data staying under customer control
- Open-source-first approach with local-first option via Phoenix
| - One API key works with dozens of models
- No credit card required to start
- Credits never expire
- One-time purchase instead of subscription
- Compare responses from multiple models side-by-side
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 78 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 34 | 5 |
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| Citation Flow (Majestic) | 54 | 24 |
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| Referring domains (Majestic) | 5527 | 51 |
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