What Pydantic does
Pydantic (Pydantic Services Inc.) is a developer-tools company building a “type-safe” stack for the Python and AI ecosystem: (1) Pydantic Validation for runtime data validation based on Python type hints, (2) Pydantic AI for building agentic LLM applications with typed, validated tool inputs/outputs, (3) Pydantic AI Harness for composing longer-running agent workflows (workspace, planning, durable state, etc.), and (4) Pydantic Logfire, an AI-native observability platform built on OpenTelemetry that helps teams debug and operate LLM and agent systems using end-to-end traces, cost, and evaluation workflows. The company’s commercial strategy ties together open source credibility (the core SDKs are MIT-licensed) with paid observability and operational controls (Logfire plans; AI Gateway controls and integrations are managed through Logfire).