# Simon Russell

> Simon Russell is co-founder and CTO of Prefactor. Prefactor on Anchor Terminal, with grades, an about and public profiles.

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- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Co-founder and CTO, Prefactor.

Simon Russell co-founded Prefactor and is its CTO. He has held founder, CTO and engineering leadership roles at Antler, Overspecific, Tokio, iflix and Greensync.

- LinkedIn: https://www.linkedin.com/in/simonrussell

## What Simon builds

- [Prefactor](https://www.anchorterminal.com/tools/prefactor.md), graded B, 66/100, in Agent observability & evals. Prefactor is a hosted service that records AI agent runs as spans, classifies each run's data risk and stores quality evaluations. Agents and scripts reach it through an HTTP and WebSocket API, TypeScript and Python SDKs and a CLI. Co-founder and CTO, Prefactor, researched 2026-10-27.

## Works with

- [Matt Doughty](https://www.anchorterminal.com/people/matt-doughty/), Co-founder and CEO, Prefactor

## Backed by

- [Antler](https://www.anchorterminal.com/investors/antler/)
- [Black Nova Venture Capital](https://www.anchorterminal.com/investors/black-nova-venture-capital/)
- [Func Ventures](https://www.anchorterminal.com/investors/func-ventures/)

## Questions

### Who is Simon Russell?

Simon Russell co-founded Prefactor and is its CTO. He has held founder, CTO and engineering leadership roles at Antler, Overspecific, Tokio, iflix and Greensync.

### What does Prefactor Pty Ltd make?

Anchor Terminal lists Prefactor from Prefactor Pty Ltd. Prefactor is a hosted service that records AI agent runs as spans, classifies each run's data risk and stores quality evaluations. Agents and scripts reach it through an HTTP and WebSocket API, TypeScript and Python SDKs and a CLI.

### Who has invested in Prefactor Pty Ltd?

The sources our research read name Antler, Black Nova Venture Capital and Func Ventures.

### How are Simon's tools graded?

Prefactor is graded B, 66 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://prefactor.tech/about-us
- https://prefactor.tech/contact
- https://prefactor.tech/
- https://docs.prefactor.ai

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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