cmux
AI Agents · Developer Tools
3open roles
2backers · Y Combinator, Scribble Ventures
50+team · employees, estimated range
17stories in the press
Overview
Free and open source macOS terminal for AI coding agents. Works with Claude Code, Codex, OpenCode, Gemini CLI, Kiro, Aider, and any CLI tool.
Funding and backers
Team
51-200
employees, estimated range
Hiring now
3
open roles
Backers
2
Y Combinator, Scribble Ventures
Momentum
15/100
rising traction
Last sign of life
1 mo ago
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Jun 2024
Went through Y Combinator
Tractionpublic signals, read monthly
Web presence
top 2%
of 133.2M domains by links, Common Crawl
Hacker News stories
2
best: 2 points
Backed byfrom the funds' portfolios and accelerator catalogs
Investors in similar startupsfunds that back the companies most like this one
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Jobs
$130k – $170k per year · Equity 0.5–1.5% · In office · Full-Time · San Francisco
Rust
C++
Zig
Ghostty
AI/ML
AI Agents
DevOps
GitHub
Linux
Windows
Apply
$130k – $170k per year · Equity 0.5–1.5% · In office · Full-Time · San Francisco
Zig
Ghostty
AI/ML
AI Agents
DevOps
GitHub
Linux
Windows
Apply
$130k – $170k per year · Equity 0.5–1.5% · In office · Full-Time · San Francisco
Rust
C++
Swift
Zig
Ghostty
AI/ML
AI Agents
DevOps
GitHub
Linux
Windows
Apply
Growth
Hiring Momentum
28/100
Slowing
Open positions
3
0 opened / 0 closed in 30 days
ATS activity
Every ~5 hours
Today
Hiring Dynamics
0%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Backend
67% ▼
Design
33% ▼
Tech stack
Technologies named in job postings at cmux over the last 12 months, by layer, with the share of postings for each.
Technologies in use
9
Postings analysed
3
Stack modernity
80/100
Languages
Zig
C++
Rust
Swift
Cloud & platforms
GitHub
Linux
Windows
Sign in to see how your skills match this stack
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Full cmux tech stack
9 technologies · by team · pay by technology · changes · similar stacks
Connections
List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors
Scribble VenturesVia a fund
Y CombinatorVia a fund
6310 portfolio companies
Click a company to open it. Dashed lines are likely connections. The second step of the network is part of the Pro plan.
Owner
Same company
Same group
Likely
News
How I used 367 billion tokens in 30 days
My cmux loop is Cmd+Shift+U, review the next finished agent, reply, repeat, then start another task when the notification queue is empty.
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Report
Superrepos and Why Claude Code Is the Best Worktree Manager
A lot of people have asked why cmux doesn't have a worktree manager yet. The best manager can choose a worktree, second checkout, sandbox, VM, or GPU cluster.
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Introducing cmux Fork
Branch an agent conversation into a new split, tab, or workspace without losing its context.
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Unread workspace shortcuts in cmux
Cmd+Control+U cycles through unread workspaces while keeping them unread, and Cmd+Option+U toggles read state.
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A better markdown viewer in cmux
Open README.md with cmux open or drag markdown files from the right sidebar.
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Task Manager in cmux
Use cmux top or Task Manager from the command palette to see CPU and RAM usage for your coding agents.
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Passkey auth in the cmux browser
cmux's embedded browser supports passkey authentication and can import cookies from other browsers with cmux browser import.
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Session restore in cmux
How cmux restores layouts and resumes Claude Code, Codex, OpenCode, Gemini CLI, Antigravity CLI, Grok Build CLI, and other agent sessions.
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oh-my-openagent subagents as native cmux panes
oh-my-openagent orchestrates specialist Claude, GPT, and Gemini agents in parallel. cmux omo turns each tmux pane into a native split.
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Claude Code teammate agents as native cmux panes
Claude Code's teammate mode requires tmux. cmux fakes it so teammates become native splits with sidebar metadata and notifications.
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Show more news
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
1
Countries
1
Busiest office
San Francisco
San Francisco
United States
HQ
3 open roles 3 posted in 90 days 67% engineering 50-200 est. staff $170k Avg Salary
hires for Backend, Design