# Ian Tien (slim)

> Ian Tien is founder, Mattermost of Inc.. Mattermost on Anchor Terminal, with grades, an about and public profiles.

- Full: https://www.anchorterminal.com/people/ian-tien/index.md (~900 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/people/ian-tien/index.json · canonical https://www.anchorterminal.com/people/ian-tien/
- 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)

Founder, Mattermost, Inc..

Ian Tien is co-founder and CEO of Mattermost, a secure collaboration platform for national security and critical infrastructure organisations, from Y Combinator's Summer 2012 batch.

- LinkedIn: https://www.linkedin.com/in/iantien/

## What Ian builds

- [Mattermost](https://www.anchorterminal.com/tools/mattermost.md), graded B, 66/100, in Work & productivity. Mattermost is an open-core team chat server from Mattermost, Inc. that its owner hosts, with channels, threads, calls and playbooks. Agents reach it through the REST API v4, bot accounts, personal access tokens, webhooks and an MCP server. Founder, Mattermost, Inc., researched 2026-10-26.

## Backed by

- [Y Combinator](https://www.anchorterminal.com/investors/y-combinator/)
- [Redpoint Ventures](https://www.anchorterminal.com/investors/redpoint-ventures/)
- [Battery Ventures](https://www.anchorterminal.com/investors/battery-ventures/)

## Questions

### Who is Ian Tien?

Ian Tien is co-founder and CEO of Mattermost, a secure collaboration platform for national security and critical infrastructure organisations, from Y Combinator's Summer 2012 batch.

### What does Mattermost, Inc. make?

Anchor Terminal lists Mattermost from Mattermost, Inc..

### Who has invested in Mattermost, Inc.?

The sources our research read name Y Combinator, Redpoint Ventures and Battery Ventures.

### How are Ian's tools graded?

Mattermost is graded B, 66 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.ycombinator.com/companies/mattermost
- https://mattermost.com/
- https://mattermost.com/contact-us/
- https://mattermost.com/company/about-us/

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.