Linzumi

aid: linzumi
name: Linzumi
description: Linzumi is a Y Combinator (Spring 2026) company in San Francisco building a Slack-shaped team chat that runs
  a fleet of AI coding agents inside every channel. Engineering teams kick off work, watch agent activity in real time, review
  output, and ship code without leaving the thread. Unlike sandboxed cloud agent products, Linzumi runs agents on the developer's
  own machine through a local "Commander" runner installed from the @linzumi/cli npm package, so agents work against real
  environment variables, dotfiles, and branches inside explicitly trusted folders. The product adds a decision inbox that
  surfaces only the choices needing a human, continuously compiled team context, git safety snapshots taken before each agent
  turn, and a bundled local MCP server that lets coding agents read scoped Linzumi message, thread, and channel context. It
  supports OpenAI Codex today with Claude Code announced as coming soon. The service is in beta via a macOS desktop app and
  a web workspace; there is no public developer API program, documentation portal, or published OpenAPI at this time.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://storage.googleapis.com/ployai/d195dfe3-6a0f-4051-8d67-1a4376685f60/user/3e1aeaf5-og-home-en.jpg
url: https://raw.githubusercontent.com/api-evangelist/linzumi/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: enriched-from-public-sources
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Artificial Intelligence
- Developer Tools
- Coding Agents
- Team Chat
- Collaboration
- MCP
- Command Line Interface
- Y Combinator
apis:
- aid: linzumi:runner-api
  name: Linzumi Runner API
  description: The private product API behind the Linzumi web workspace and the local Commander runner, served from serve.linzumi.com
    under a /api/v2 URI-versioned path. It is not a published developer API — there is no portal, reference, or OpenAPI —
    but it is partially observable through the publicly published @linzumi/cli client, which documents the device-authorization
    endpoint and speaks WebSocket to wss://serve.linzumi.com for runner traffic. Captured here as an observed surface, not
    a supported public contract.
  humanURL: https://www.npmjs.com/package/@linzumi/cli
  baseURL: https://serve.linzumi.com/api/v2
  tags:
  - Coding Agents
  - Team Chat
  properties:
  - type: Authentication
    url: authentication/linzumi-authentication.yml
  - type: Conventions
    url: conventions/linzumi-conventions.yml
  - type: ErrorCatalog
    url: errors/linzumi-problem-types.yml
common:
- type: Website
  url: https://linzumi.com/
- type: Login
  url: https://serve.linzumi.com/
- type: Support
  url: mailto:hello@linzumi.com
- type: Download
  url: https://downloads.linzumi.com/macos-beta/linzumi_macos_latest.dmg
- type: Profile
  url: https://www.ycombinator.com/companies/linzumi
- type: Packages
  url: packages/linzumi-packages.yml
- type: CLI
  url: cli/linzumi-cli.yml
- type: MCPServer
  url: mcp/linzumi-mcp.yml
- type: Authentication
  url: authentication/linzumi-authentication.yml
- type: Conventions
  url: conventions/linzumi-conventions.yml
- type: ErrorCatalog
  url: errors/linzumi-problem-types.yml
- type: Lifecycle
  url: lifecycle/linzumi-lifecycle.yml
- type: ChangeLog
  url: changelog/linzumi-changelog.yml
- type: DomainSecurity
  url: security/linzumi-domain-security.yml
- type: LLMsTxt
  url: llms/linzumi-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence