# Alex Luis (slim)

> Alex Luis is co-founder, Round One of Inc.. Sendblue on Anchor Terminal, with grades, an about and public profiles.

- Full: https://www.anchorterminal.com/people/alex-luis/index.md (~750 tokens) · this version ~480 tokens · JSON https://www.anchorterminal.com/people/alex-luis/index.json · canonical https://www.anchorterminal.com/people/alex-luis/
- 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, Round One, Inc..

Alex Luis is a co-founder of Sendblue, an iMessage platform for sales teams from Y Combinator's Summer 2023 batch.

- LinkedIn: https://linkedin.com/in/alex-luis

## What Alex builds

- [Sendblue](https://www.anchorterminal.com/tools/sendblue.md), graded C, 61.7/100, in Messaging APIs. Sendblue is a hosted API from Round One, Inc. for sending and receiving iMessage, RCS, SMS and MMS from dedicated or shared phone numbers. Agents use a REST API, TypeScript and Python SDKs, a CLI and an MCP server. Co-founder, Round One, Inc., researched 2026-10-26.

## Works with

- [Rob Haber](https://www.anchorterminal.com/people/rob-haber/), Co-founder, Round One, Inc.

## Backed by

- [Y Combinator](https://www.anchorterminal.com/investors/y-combinator/)

## Questions

### Who is Alex Luis?

Alex Luis is a co-founder of Sendblue, an iMessage platform for sales teams from Y Combinator's Summer 2023 batch.

### What does Round One, Inc. make?

Anchor Terminal lists Sendblue from Round One, Inc..

### Who has invested in Round One, Inc.?

The sources our research read name Y Combinator.

### How are Alex's tools graded?

Sendblue is graded C, 61.7 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.ycombinator.com/companies/sendblue
- https://www.sendblue.com/

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.