What is Inline AI used for?

Inline AI is a macOS app that offers AI writing help on selected text in any application, using your own OpenAI, Anthropic or Gemini API keys. It is a good fit for fixing grammar in any Mac app and summarizing selected text without leaving the page.

Yes. Inline AI has a free plan. Freemium with 3 prompts and no license; a one-time purchase unlocks the full app.

Is Inline AI open source?

No. Inline AI is proprietary (closed-source) software. In the AI Tools category, open-source options include ChatChat, Writely and Cherry Studio.

Can I self-host Inline AI?

Yes. Although Inline AI is closed source, it can be self-hosted on your own servers.

What are some alternatives to Inline AI?

Inline AI competes with Grammarly, Wordtune and QuillBot.

Inline AI: features, pricing and alternatives

About Inline AI

Inline AI appears wherever you write on a Mac. You select text in any app, pick an action from AI suggestions or search, and get results you can accept, modify or retry, using built-in or custom prompts for grammar and style correction, expansion, summarization and translation.

It uses your own API keys for OpenAI, Anthropic and Gemini, with switching between providers in one click, and the vendor states that your data never touches its servers. Prompts can be customized, on-the-fly prompts can be written for any app, and shortcuts and launch at login are configurable. A context-aware mode is marked as coming soon, and the product is in beta.

A freemium version needs no license and includes 3 AI prompts with built-in prompts only and email support. The site describes a one-time purchase for the full app, and it is aimed at writers, developers and professionals who want AI help without switching windows.

Key features

AI help on selected text in any Mac app
Bring your own API keys
OpenAI, Anthropic and Gemini support
Custom prompts and shortcuts
Grammar, expansion and translation actions
Free tier with limited prompts

Good fit for

Fixing grammar in any Mac app
Summarizing selected text without leaving the page

Tags: macos; ai-writing; byok; openai; anthropic; productivity

Inline AI: questions and answers

What is Inline AI used for?: Inline AI is a macOS app that offers AI writing help on selected text in any application, using your own OpenAI, Anthropic or Gemini API keys. It is a good fit for fixing grammar in any Mac app and summarizing selected text without leaving the page.
Is Inline AI free?: Yes. Inline AI has a free plan. Freemium with 3 prompts and no license; a one-time purchase unlocks the full app.
Is Inline AI open source?: No. Inline AI is proprietary (closed-source) software. In the AI Tools category, open-source options include ChatChat, Writely and Cherry Studio.
Can I self-host Inline AI?: Yes. Although Inline AI is closed source, it can be self-hosted on your own servers.
What are some alternatives to Inline AI?: Inline AI competes with Grammarly, Wordtune and QuillBot.