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  "markdown": "Co-founder, Slack Technologies.\n\nStewart 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.\n\n## What Stewart builds\n\n- [Slack MCP Server (official)](https://www.anchorterminal.com/tools/slack-mcp.md), graded C, 59.7/100, in Work \u0026 productivity. Slack's hosted MCP server for searching, reading and posting workspace content, with OAuth authentication. Co-founder, Slack Technologies, researched 2026-10-28.\n\n## Works with\n\n- [Cal Henderson](https://www.anchorterminal.com/people/cal-henderson/), Co-founder, Slack Technologies\n- [Eric Costello](https://www.anchorterminal.com/people/eric-costello/), Co-founder, Slack Technologies\n- [Serguei Mourachov](https://www.anchorterminal.com/people/serguei-mourachov/), Co-founder, Slack Technologies\n\n## Questions\n\n### Who is Stewart Butterfield?\n\nStewart 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.\n\n### What does Slack (Salesforce) make?\n\nAnchor Terminal lists Slack MCP Server (official) from Slack (Salesforce). Slack's hosted MCP server for searching, reading and posting workspace content, with OAuth authentication.\n\n### How are Stewart's tools graded?\n\nSlack MCP Server (official) is graded C, 59.7 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.\n\n## Sources\n\n- https://slack.com/intl/en-gb/\n- https://slack.com/intl/en-gb/help\n- https://en.wikipedia.org/wiki/Slack_Technologies\n\nThese 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.\n",
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