# Tom Preston-Werner

> Tom Preston-Werner's investments in AI tools on Anchor Terminal, Inngest, PlanetScale, Railway Corporation, Supabase and 1 more, with each listing's grade and the founders behind it.

- Canonical: https://www.anchorterminal.com/investors/tom-preston-werner/
- Markdown: https://www.anchorterminal.com/investors/tom-preston-werner/index.md (~750 tokens)
- Slim: https://www.anchorterminal.com/investors/tom-preston-werner/index.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/investors/tom-preston-werner/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- 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

Angel investor.

## Companies on Anchor Terminal

- **Inngest**
  - [Inngest](https://www.anchorterminal.com/tools/inngest.md), graded B, 66.1/100
  - Source: https://www.inngest.com/about
- **PlanetScale**, Series C, November 2021
  - [PlanetScale MCP Server](https://www.anchorterminal.com/tools/planetscale-mcp.md), graded B, 66.6/100
  - Source: https://techcrunch.com/2021/11/16/planetscale-raises-50m-series-c-as-its-enterprise-database-service-hits-general-availability/
- **Railway Corporation**
  - [Railway MCP Server](https://www.anchorterminal.com/tools/railway-mcp-server.md), graded C, 56.7/100
  - Source: https://blog.railway.com/p/series-a
- **Supabase**, Series A, October 2021
  - [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), graded BB, 75.6/100
  - Source: https://supabase.com/blog/supabase-series-a
- **tldraw**, Seed, November 2022
  - [tldraw SDK + MCP](https://www.anchorterminal.com/tools/tldraw.md), graded C, 60.8/100
  - Source: https://tldraw.dev/blog/announcing-tldraws-seed-round

## Where they invest

- Databases & files, 2
- Human approval & handoff, 1
- Cloud & infrastructure, 1
- Diagramming, 1

## Founders they backed

- [Jake Cooper](https://www.anchorterminal.com/people/jake-cooper/), Railway Corporation
- [Paul Copplestone](https://www.anchorterminal.com/people/paul-copplestone/), Supabase
- [Ant Wilson](https://www.anchorterminal.com/people/ant-wilson/), Supabase

## Questions

### Which AI tools has Tom Preston-Werner invested in?

Anchor Terminal lists Inngest, PlanetScale, Railway Corporation, Supabase and tldraw backed by Tom Preston-Werner.

### How are Tom Preston-Werner's companies graded?

On Anchor Terminal's benchmark, Inngest (B, 66.1), PlanetScale MCP Server (B, 66.6), Railway MCP Server (C, 56.7), Supabase API + MCP (BB, 75.6) and tldraw SDK + MCP (C, 60.8).

Investors are named from the companies' own announcements, the investors' own pages, Y Combinator's company pages, public filings and news reports of a round, each with its source. An investor isn't a sign of quality, and nobody can pay to be listed or to change a grade. To correct something or have a page removed, write to privacy@anchorterminal.com.

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp