Hosted Service
Observability & Evaluation
Parea AI
1Traces 2evaluates 3and 4optimizes 5LLM 6prompts
the six Ws · specification
W1
Who
YC-backed startup serving developers testing and monitoring LLM powered apps.
W2
What
Parea AI is an experimentation, evaluation and tracing platform for LLM applications with a Python SDK.
W3
Where
Hosted SaaS platform with an Apache 2.0 licensed open source SDK on GitHub.
W4
When
Founded in 2023 as a Y Combinator S23 company, SDK actively developed with over a thousand commits.
W5
Why
Lets teams run offline evaluations, compare prompts and trace nested LLM calls before shipping changes.
W6
With
Auto instruments OpenAI and Anthropic SDK calls and requires a Parea API key for cloud logging.
W7
Watch
SDK is Apache 2.0 open source and self-installable, but the collaborative dashboard and hosted trace storage are a commercial cloud product.
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