# Mark Armstrong

> Mark Armstrong is co-founder of Mailchimp. Mailchimp Marketing API and Mailchimp Transactional (Mandrill) on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/mark-armstrong/
- Markdown: https://www.anchorterminal.com/people/mark-armstrong/index.md (~850 tokens)
- Slim: https://www.anchorterminal.com/people/mark-armstrong/index.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/mark-armstrong/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, Mailchimp.

Mark Armstrong co-founded Mailchimp with Ben Chestnut in 2001. The pair started the company without outside funding, and it stayed bootstrapped until Intuit bought it in 2021.

## What Mark builds

- [Mailchimp Marketing API](https://www.anchorterminal.com/tools/mailchimp-marketing.md), graded C, 57.4/100, in Lifecycle marketing & customer engagement. Intuit Mailchimp's Marketing API manages audiences, contacts, tags, segments, events, campaigns, automations and reports for a Mailchimp account. It is a REST API at `https://api.mailchimp.com/3.0/` that takes an API key or an OAuth 2 token. Co-founder, Mailchimp, researched 2026-10-28.
- [Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/tools/mandrill.md), graded C, 58.1/100, in Email delivery APIs. Transactional email service from Intuit Mailchimp, formerly Mandrill. It sends application email and SMS through an HTTP API, SMTP or a hosted MCP server, with templates, inbound routing, webhooks and reporting, as a paid add-on to a Mailchimp plan. Co-founder, Mailchimp, researched 2026-10-28.

## Works with

- [Ben Chestnut](https://www.anchorterminal.com/people/ben-chestnut/), Co-founder, Mailchimp
- [Dan Kurzius](https://www.anchorterminal.com/people/dan-kurzius/), Co-founder, Mailchimp

## Questions

### Who is Mark Armstrong?

Mark Armstrong co-founded Mailchimp with Ben Chestnut in 2001. The pair started the company without outside funding, and it stayed bootstrapped until Intuit bought it in 2021.

### What does Intuit Mailchimp make?

Anchor Terminal lists Mailchimp Marketing API and Mailchimp Transactional (Mandrill) from Intuit Mailchimp. Intuit Mailchimp's Marketing API manages audiences, contacts, tags, segments, events, campaigns, automations and reports for a Mailchimp account. It is a REST API at https://api.mailchimp.com/3.0/ that takes an API key or an OAuth 2 token.

### How are Mark's tools graded?

Mailchimp Marketing API is graded C, 57.4 out of 100; Mailchimp Transactional (Mandrill) is graded C, 58.1 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://mailchimp.com/
- https://mailchimp.com/contact/
- https://mailchimp.com/about/
- https://en.wikipedia.org/wiki/Mailchimp

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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