Cotypist

Autocompletes Mac text privately in familiar style.

Writing & Content Writing AssistantsFree

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About Cotypist

Cotypist is a local AI autocomplete utility for Apple Silicon Macs that predicts your next words in almost any text field. It runs entirely on-device, shows inline suggestions as you type, and accepts them with Tab. The tool targets people who spend hours writing email, docs, support replies, and AI prompts. Cotypist adapts to each writer’s vocabulary and phrasing so completions sound familiar. It offers word-by-word acceptance, inline typo fixes, and emoji suggestions without extra pop-ups. Users often cut keystrokes significantly in email, support replies, and documentation. The tool has a strong privacy posture, as no prompts or documents leave the Mac, and password fields stay unread. Cotypist stays inside existing workflows, removing the need to switch to a chatbot or craft prompts to get help. However, it requires an Apple Silicon Mac running macOS 14 or later, excluding Intel, Windows, and Linux. Heavy writers may pay in money and memory, as subscriptions plus 1-2.5 GB RAM usage can feel costly to some users. Cotypist is suitable for marketing and content writers, customer support agents, technical and documentation writers, non-native English and accessibility-focused users, Neuralink implant testers, and power users who write prompts all day for AI agents.

Key features

System-wide inline autocomplete
Local-only processing on Apple Silicon
Style learning and personalization
Typing helpers built in
Word-by-word acceptance
Inline typo fixes
Emoji suggestions
Private on-device writing
Basic suggestions
Screen-aware suggestions

Use cases

Marketing and content writers: Draft campaigns, newsletters, and posts faster while keeping brand voice intact.
Customer support agents: Shorten repetitive ticket and email responses across help desks and inboxes.
Technical and documentation writers: Speed through release notes and internal docs where sentences repeat.

Pros

Runs entirely on-device on Apple Silicon Macs, ensuring no data leaves the user's device
Provides inline, real-time word predictions in any Mac text field without disrupting workflow
Adapts to the user's writing style, vocabulary, and phrasing over time for personalized suggestions
Offers word-by-word acceptance, inline typo fixes, and emoji suggestions without additional pop-ups
Supports accessibility needs, including non-native English writers and users with typing difficulties

Cons

Requires an Apple Silicon Mac running macOS 14 or later, excluding Intel, Windows, and Linux systems
May consume 1-2.5 GB of RAM during active use, which could impact performance on lower-memory devices

Frequently asked questions about Cotypist

What is Cotypist and how does it work?

Cotypist is a local AI autocomplete tool for Apple Silicon Macs that predicts your next words in any text field. It runs entirely on-device, showing inline suggestions as you type and accepting them with the Tab key. The tool adapts to your writing style, vocabulary, and phrasing over time.

Who is Cotypist designed for?

Cotypist is designed for heavy writers such as marketing and content creators, customer support agents, technical writers, non-native English speakers, and users with accessibility needs. It also suits power users who write prompts for AI agents.

Does Cotypist require an internet connection?

No, Cotypist operates entirely offline. All processing and data stay on your Apple Silicon Mac, ensuring privacy and no external data exposure.

What are the system requirements for Cotypist?

Cotypist requires an Apple Silicon Mac running macOS 14 or later. It does not support Intel-based Macs, Windows, or Linux systems.

How do I get started with Cotypist?

Download the app from the official website, open the installer, and drag Cotypist into your Applications folder. Open the app and follow the setup instructions to begin using it immediately.

Can Cotypist help with typos and emojis?

Yes, Cotypist detects typos as you type and suggests corrections inline. It also offers emoji suggestions by typing a colon followed by a shortcode, streamlining the process without additional pop-ups.