Prefactor
Prefactor is an AI agent evaluation and observability platform that scores every agent run in production the moment it happens, surfacing quality regressions, drift, and risk in real time so a failing agent is caught live rather than charted after an incident. It drops into your stack in minutes via TypeScript and Python SDKs and OpenTelemetry ingest, with native integrations for LangChain, Claude, Vercel AI, OpenClaw, and LiveKit, and turns every model call, tool, and decision into a span with cost and data-risk attached. Beyond scoring, it wires evaluations into runtime action, letting teams block, delete, escalate, or stop a run in milliseconds, and is built around least-privilege, full auditability, and your existing identity stack. Free for the first 25,000 spans a month, it targets engineering teams shipping agents to customers who need the gap between passing evals and production reliability closed. It is notable now because agent observability matured from a nice-to-have into a governance requirement for teams deploying autonomous workflows.
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