cmux (YC S24) — Open source applied AI lab building next-gen devtools
An open source native macOS terminal built on Ghostty. Vertical tabs, notification rings when agents need attention, split panes, and a CLI for programmability.
cmux is a Y Combinator company in the Summer 2024 batch. Its directory entry describes it as: Open source applied AI lab building next-gen devtools. The founders listed are Austin Wang (Founder), Lawrence Chen (Founder) (Y Combinator directory entry, May 18, 2024).
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Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
An open source native macOS terminal built on Ghostty. Vertical tabs, notification rings when agents need attention, split panes, and a CLI for programmability.
cmux lists 3 open roles on its directory entry.
Checked away from the directory entry. What is below does not come from the company's Y Combinator page.
Free and open source macOS terminal for AI coding agents. Works with Claude Code, Codex, OpenCode, Gemini CLI, Kiro, Aider, and any CLI tool.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Austin Wang
Founder
Building cmux.com, the open source terminal built for coding agents.
Co-founder & CEO @ cmux / Physics @ Yale / Prev @ NASA JPL, Chess.com
Lawrence Chen
Founder
Building cmux.com, the open source terminal built for coding agents
Co-founder of Manaflow / prev. Minion AI / Berkeley '24
Founders, titles and bios as the company published them. Photographs are our own copies of the ones on that record, so they do not break when the original link expires.
No investor is drawn from a Form D — the form states how many invested and never who. The one investor on this graph is named because a batch has exactly one.
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Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
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The Short Answer
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What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
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