# Cassidy Williams (slim)

> Cassidy Williams's investments in AI tools on Anchor Terminal, Cal.com, Daytona, Resend and Stytch (Twilio), with each listing's grade and the founders behind it.

- Full: https://www.anchorterminal.com/investors/cassidy-williams/index.md (~650 tokens) · this version ~530 tokens · JSON https://www.anchorterminal.com/investors/cassidy-williams/index.json · canonical https://www.anchorterminal.com/investors/cassidy-williams/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Angel investor.

## Companies on Anchor Terminal

- **Cal.com**, Seed
  - [Cal.com API v2 + MCP](https://www.anchorterminal.com/tools/cal-com.md), graded C, 57.2/100
  - Source: https://cal.com/blog/seed
- **Daytona**, Pre-seed, November 2023
  - [Daytona](https://www.anchorterminal.com/tools/daytona.md), graded B, 64.3/100
  - Source: https://www.daytona.io/dotfiles/daytona-raises-2m-in-pre-seed
- **Resend**
  - [Resend API + MCP](https://www.anchorterminal.com/tools/resend.md), graded BB, 77.1/100
  - Source: https://resend.com/about
- **Stytch (Twilio)**, Series A, July 2021
  - [Stytch Connected Apps](https://www.anchorterminal.com/tools/stytch-connected-apps.md), graded C, 60.8/100
  - Source: https://stytch.com/blog/announcing-our-30-million-series-a/

## Where they invest

- Calendars & scheduling, 1
- Code execution sandboxes, 1
- Email delivery APIs, 1
- Agent auth & delegated access, 1

## Founders they backed

- [Zeno Rocha](https://www.anchorterminal.com/people/zeno-rocha/), Resend
- [Bu Kinoshita](https://www.anchorterminal.com/people/bu-kinoshita/), Resend

## Questions

### Which AI tools has Cassidy Williams invested in?

Anchor Terminal lists Cal.com, Daytona, Resend and Stytch (Twilio) backed by Cassidy Williams.

### How are Cassidy Williams's companies graded?

On Anchor Terminal's benchmark, Cal.com API v2 + MCP (C, 57.2), Daytona (B, 64.3), Resend API + MCP (BB, 77.1) and Stytch Connected Apps (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.