Boost your throughput with AI understanding your task by fetching context from your active app.

Alter works everywhere and has special features for Finder, Apple Mail, and Keynote.

Summon Alter's contextual menu with a global shortcut like `alt+option`, and every action displayed is shortcut-enabled with a mnemonic system.

It provides 60+ AI actions suggested when you need them:

- Browsing YouTube? Get a nice summary from the transcript.

- Selected some emails on Apple Mail? Extract to-dos from the conversations.

- Opened Keynote? Generate a draft presentation with images fetched from the web.

- Selected some text? Translate, fix typos and grammar, or change the tone.

- Selected some text in LinkedIn? Extend it to a full post.

- Selected a research paper in Finder? Analyze it.

- Selected some files and folders? Ask anything or get a summary.

- Selected a git-commit in your code editor? Generate a commit message.

Besides, Alter has co-intelligences, from marketing and business to mental models and software engineering. Chat with them to brainstorm, solve issues, and get an expert view on a given topic.

Customization is a priority; you can create your own actions to perfectly fit your workflow. You can also choose your own shortcuts for every action and folder.

Alter provides AI models without the need for an API key. Get access to multiple models and providers: OpenAI, Claude, Gemini, Groq, and Together.

Have your own API key or want to use local models? We support OpenAI-compatible endpoints.

Want full privacy? Use Ollama and LM Studio for an offline experience.

For a full comparison with the official ChatGPT desktop app, see https://alterhq.com/vs/chatgpt-macos-desktop.