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Proliferate

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Manage a team of agents from your desktop

Summer 2025Founded 2025San Francisco, CA, USA

About

Manage a fleet of agents locally or in the cloud. 100% open source and free to use. Built to help you do your life's work.

Founders ยท 1

Pablo Hansen
Pablo HansenFounder

I finished my master's degree in AI at 19 and was then hire #1 at Onyx (YC W24) for a year before starting Proliferate (fka. Keystone).

Launch

Launched on Y Combinator ยท Feb 2026
View launch post โ†—

Build yourself an AI coworker that actually takes work off your plate

Proliferate opens sources a self-hostable platform for building company-specific background agents that run in isolated sandboxes with access to internal services, triggered by events, and surfaced via live, multiplayer previews for team verification. It targets engineering teams needing end-to-end automated work beyond local agents, with MIT licensing and self-hosting.

Formerly โ€œKeystoneโ€

B2BEngineering, Product and DesignDeveloper ToolsSaaSB2BAI

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