Cindy

Cindy is an open-source AI agent from XD Inc. that aims to work out of the box: install the app, connect a model, and ask it to do real work in your files, browser and apps. Rather than shipping its own harness only, it runs Claude Code, Codex or the open-source Pi agent underneath and gives them a shared interface, so you can switch harness or model mid-project while the session stays in Cindy. One agent can lead others, splitting planning, parallel implementation and review against a shared goal.

Its distinctive idea is device linking. Your work computer, home desktop, laptop and phone sign in to one account; you can continue a session from another device, use model subscriptions configured on another machine, and operate a connected computer through built-in remote desktop on the phone, without renting a server. Answers can include charts, interactive controls and rich HTML, recurring work runs as automations, tasks can arrive through Slack or Telegram, and memory, reusable skills, plugins and MCP extend what it can do. You can also create named companions with their own role, instructions and recurring work.

The client is Apache-2.0 licensed and free on macOS, Windows, Linux, iOS and Android. Bring your own API key, a supported Claude Code or Codex plan, or a local model at no extra charge, or use Cindy's managed model credits: pay-as-you-go top-ups from $10, or Plus, Super and Ultra monthly plans at $20, $100 and $200 of credit.