# Ian Reither (slim)

> Ian Reither is co-founder of Telnyx. Telnyx API + MCP and Telnyx Voice API + MCP on Anchor Terminal, with grades, an about and public profiles.

- Full: https://www.anchorterminal.com/people/ian-reither/index.md (~950 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/people/ian-reither/index.json · canonical https://www.anchorterminal.com/people/ian-reither/
- 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)

Co-founder, Telnyx.

Ian Reither co-founded Telnyx with David Casem in Chicago in 2009. The company began as a call-centre consulting firm, moved into wholesale voice reselling and call-routing software, then became a licensed telecommunications carrier.

## What Ian builds

- [Telnyx API + MCP](https://www.anchorterminal.com/tools/telnyx.md), graded BB, 73.7/100, in Messaging APIs. Carrier-owned CPaaS with SMS, MMS, RCS and WhatsApp on one REST API, plus an official hosted MCP server at api.telnyx.com/v2/mcp and a stdio MCP package. Co-founder, Telnyx, researched 2026-10-28.
- [Telnyx Voice API + MCP](https://www.anchorterminal.com/tools/telnyx-voice.md), graded BB, 74.3/100, in Phone calling & voice transport. Carrier-owned Voice API (Call Control and TeXML) for calls, numbers, websocket media streaming, recording and transfers on Telnyx's own network. Co-founder, Telnyx, researched 2026-10-28.

## Works with

- [David Casem](https://www.anchorterminal.com/people/david-casem/), CEO

## Backed by

- [Techstars](https://www.anchorterminal.com/investors/techstars/)
- [Pritzker Group Venture Capital](https://www.anchorterminal.com/investors/pritzker-group-venture-capital/)
- [Chicago Ventures](https://www.anchorterminal.com/investors/chicago-ventures/)
- [Corazon Capital](https://www.anchorterminal.com/investors/corazon-capital/)
- [Math Venture Partners](https://www.anchorterminal.com/investors/math-venture-partners/)
- [Mike Gamson](https://www.anchorterminal.com/investors/mike-gamson/)

## Questions

### Who is Ian Reither?

Ian Reither co-founded Telnyx with David Casem in Chicago in 2009. The company began as a call-centre consulting firm, moved into wholesale voice reselling and call-routing software, then became a licensed telecommunications carrier.

### What does Telnyx make?

Anchor Terminal lists Telnyx API + MCP and Telnyx Voice API + MCP from Telnyx.

### Who has invested in Telnyx?

The sources our research read name Techstars, Pritzker Group Venture Capital, Chicago Ventures, Corazon Capital, Math Venture Partners and Mike Gamson.

### How are Ian's tools graded?

Telnyx API + MCP is graded BB, 73.7 out of 100; Telnyx Voice API + MCP is graded BB, 74.3 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.linkedin.com/in/dcasem/
- https://telnyx.com/
- https://en.wikipedia.org/wiki/Telnyx

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.