---
title: "Prefactor — An observability platform for evaluating the performance of production AI agents."
source: https://listmaro.com/tools/prefactor
description: "Prefactor is an observability and evaluation platform specifically designed for production AI agents. It continuously scores every agent based on…"
updated: 2026-08-10
---

# Prefactor

> An observability platform for evaluating the performance of production AI agents.

- **Website:** https://prefactor.tech/
- **Pricing:** Freemium
- **Categories:** [AI Tools](https://listmaro.com/categories/ai-tools), [Developer Tools](https://listmaro.com/categories/developer-tools)
- **Tags:** [ai](https://listmaro.com/tags/ai), [risk-management](https://listmaro.com/tags/risk-management), [observability](https://listmaro.com/tags/observability), [monitoring](https://listmaro.com/tags/monitoring), [agent-evaluation](https://listmaro.com/tags/agent-evaluation)
- **Upvotes:** 0
- **Listed:** 2026-08-09
- **Last updated:** 2026-08-10
- **Placement:** Editorial listing — not paid for

## About Prefactor

Prefactor is an observability and evaluation platform specifically designed for production AI agents. It continuously scores every agent based on quality, drift, and risk, ensuring that developers and AI teams can monitor and improve their agents in real time. This platform targets developers, product managers, and AI governance heads who are responsible for ensuring the reliability and security of AI systems. Unlike traditional monitoring tools that rely on post-event analysis, Prefactor enables proactive management by wiring evaluations directly into actionable responses. This means that if an agent's performance drops or if it crosses risk thresholds, necessary actions can be taken immediately—either by pausing the agent or requiring human approval through its SDK or API integration. Prefactor is built for environments where understanding agent behaviors and outcomes is critical, offering integrations with popular AI frameworks and tools. With a model that supports freemium access for the first 25,000 spans a month, it serves small teams and enterprise-level implementations alike.

## What Prefactor does

- **Real-time agent evaluation** — Prefactor continuously evaluates AI agents in production as they operate, scoring each run for quality, drift, and risk in real time.
- **Runtime enforcement** — The platform not only observes and evaluates but also allows for immediate actions to be taken on agents, such as blocking or requiring approval for risky actions.
- **Custom spans integration** — Users can bring context from any datasource into agent runs, allowing for detailed evaluations grounded in actual performance and conditions.
- **Versioning and schema management** — Prefactor supports versioning for agents, enabling users to promote or roll back to previous versions based on evaluation scores and schema compliance.
- **Human-in-the-loop control** — High-risk actions can be paused and routed to a human for approval before execution, ensuring oversight on sensitive operations.

## Who it’s for

This product is designed for teams managing AI agents in production, specifically benefiting those in roles such as Developers, Heads of AI, and Security & Governance. It may not be suitable for smaller teams with limited or no AI operations.

## What it costs

Prefactor offers usage-based pricing starting with a free tier that includes 25,000 spans per month. Paid plans begin at $250 per month for 100,000 spans, scaling with higher usage options available.

## Works with

LangChain, Claude, Vercel AI, OpenClaw, LiveKit, GitHub

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## About this data

List Maro is an early-stage, human-reviewed directory of SaaS products — nothing is published automatically. Numbered category rankings appear only after the published evidence thresholds are met; promoted placements are labelled and kept separate from organic ordering.

- **Canonical page:** https://listmaro.com/tools/prefactor
- **Publisher:** List Maro (https://listmaro.com/)
- **Machine index:** https://listmaro.com/llms.txt
- **JSON API:** https://listmaro.com/api/public/openapi.json
- **Methodology:** https://listmaro.com/methodology