Skip to content
A1Base logo

A1Base

A1Base is a YC Winter 2025 (W25) company. Based in San Francisco, CA, USA. Team of 2.

  • Developer Tools

About A1Base

GPAgent's own fund-neutral profile, written from public information. Updated Oct 5, 2026.

Summary

A1Base builds communication infrastructure for AI agents, giving them the ability to send and receive messages across email, SMS, WhatsApp, Slack, and other channels. It targets developers and AI product teams who need their agents to interact with end users through existing messaging platforms. The product replaces custom-built integrations for each channel.

Go-to-market

Developers and AI product builders are the primary buyers, reached through a self-serve model typical of developer infrastructure tools.

From the Y Combinator listing

How A1Base describes itself in Y Combinator's public directory. Original listing (opens in a new tab)

Twilio for AI Agents

Twilio for AI agents. We help AI products talk and work to their users through email, Slack, SMS, WhatsApp and more.

Facts

Industry
B2B / B2B -> Engineering, Product and Design
Location
San Francisco, CA, USA
Team size
2
Status
Active
Stage
Early

Founders (1)

Score every batch against your own thesis

GPAgent's sourcing agent reads every company in a batch, scores each one against your fund's thesis in a private workspace, and lines up the founders worth meeting before Demo Day. You decide who to contact. Your scores, notes, and pipeline never appear on these pages.

How Accelerator intelligence works