# Stewart Butterfield

> Stewart Butterfield is co-founder of Slack Technologies. Slack MCP Server (official) on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/stewart-butterfield/
- Markdown: https://www.anchorterminal.com/people/stewart-butterfield/index.md (~700 tokens)
- Slim: https://www.anchorterminal.com/people/stewart-butterfield/index.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/stewart-butterfield/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

Co-founder, Slack Technologies.

Stewart Butterfield co-founded Slack Technologies, first named Tiny Speck, in 2009 after co-founding the photo-sharing site Flickr. Salesforce completed its acquisition of Slack in July 2021.

## What Stewart builds

- [Slack MCP Server (official)](https://www.anchorterminal.com/tools/slack-mcp.md), graded C, 59.7/100, in Work & productivity. Slack's hosted MCP server for searching, reading and posting workspace content, with OAuth authentication. Co-founder, Slack Technologies, researched 2026-10-28.

## Works with

- [Cal Henderson](https://www.anchorterminal.com/people/cal-henderson/), Co-founder, Slack Technologies
- [Eric Costello](https://www.anchorterminal.com/people/eric-costello/), Co-founder, Slack Technologies
- [Serguei Mourachov](https://www.anchorterminal.com/people/serguei-mourachov/), Co-founder, Slack Technologies

## Questions

### Who is Stewart Butterfield?

Stewart Butterfield co-founded Slack Technologies, first named Tiny Speck, in 2009 after co-founding the photo-sharing site Flickr. Salesforce completed its acquisition of Slack in July 2021.

### What does Slack (Salesforce) make?

Anchor Terminal lists Slack MCP Server (official) from Slack (Salesforce). Slack's hosted MCP server for searching, reading and posting workspace content, with OAuth authentication.

### How are Stewart's tools graded?

Slack MCP Server (official) is graded C, 59.7 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://slack.com/intl/en-gb/
- https://slack.com/intl/en-gb/help
- https://en.wikipedia.org/wiki/Slack_Technologies

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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