Cotypist
Summary
Switching between Mail, Notion, Slack, and your IDE means your writing voice fragments across four different contexts — and no general-purpose AI assistant remembers which app gets formal prose versus terse code comments.
Cotypist sits in the macOS menu bar and surfaces word-completion suggestions as you type, accepted with a Tab keystroke, across whichever apps you have open. The differentiating mechanic is per-app instruction profiles: you teach it one voice for client emails, a different register for pull-request descriptions, and it holds those rules separately per application. On-device processing keeps your keystrokes off external servers. The free tier caps daily output at 100 words — a ceiling that arrives fast for anyone with real writing volume. No API, no Windows build, no self-hosting path exists.
Bottom line: Pick Cotypist if you write across several Mac apps daily and want per-app voice rules without your drafts leaving the machine — but if your team runs Windows or you need to script completions into a pipeline, there is no path forward here.
Pricing Plans
SubscriptionLast verified 2 days ago- Price
- $6/mo or $9/mo
- Free Tier
- 100 completed words a day
Free
For occasional writing. 100 completed words a day.
- 100 completed words/day
- Word-by-word acceptance
- Emoji suggestions
- Works across languages
- Typo indicator
- Screen-aware suggestions
- Learns from your voice
- Gentle personalization
- Curated set of models
- Clipboard awareness
- Configurable completion length
- Custom writing instructions
- Per-app instructions
- Early access to Labs features
- Mid-line completion
Plus
For people who write every day. Unlimited completions on one Mac, with full autocorrect and your own writing instructions.
- Unlimited completions
- 1 Mac
- Works in every Mac app
- Private and on-device
- 30-day Pro free trial
- Word-by-word acceptance
- Emoji suggestions
- Works across languages
- Full autocorrect
- Screen-aware suggestions
- Learns from your voice
- Balanced personalization
- Curated set of models
- Clipboard awareness
- Configurable completion length
- Custom writing instructions
- Per-app instructions
- Early access to Labs features
- Mid-line completion
Pro
For the power users who already think faster than they type. Unlimited writing on up to three of your own Macs, with the full model lineup and the deepest customization.
- Unlimited completions
- Up to 3 Macs
- Works in every Mac app
- Private and on-device
- 30-day Pro free trial
- Word-by-word acceptance
- Emoji suggestions
- Works across languages
- Full autocorrect
- Screen-aware suggestions
- Learns from your voice
- Strong personalization
- Full model catalog
- Clipboard awareness
- Configurable completion length
- Custom writing instructions
- Per-app instructions
- Early access to Labs features
- Mid-line completion
View full pricing on cotypist.app →
Pricing may have changed since last verified. Check the official site for current plans.
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Pros
Sign in to edit- Per-app instruction profiles let you maintain a different writing register for each application, so client emails, Slack messages, and code comments each get the voice you set without manual switching.
- On-device processing means your keystrokes and draft content are not transmitted to external servers, which matters for anyone working with confidential documents or under data-handling obligations.
- Tab-to-accept inline completions work inside whichever Mac app has focus, so you never break flow by switching to a separate chat window or sidebar.
- Multi-Mac profile sync at the paid tier means your per-app voice configuration carries across machines, avoiding the tedious work of reconfiguring from scratch on a second device.
Cons
Sign in to edit- The free tier's 100-words-per-day cap cuts off mid-session for anyone with real writing volume — a journalist drafting a single article, a developer writing commit messages all morning, or a support agent handling a ticket queue will exhaust it before noon and face a choice between upgrading or stopping.
- There is no Windows version, no Linux path, and no browser extension, so any team that runs a mixed OS environment cannot standardize on this tool — the realistic next step is a browser-based assistant like a Chrome extension that works across platforms.
- No API means completions cannot be scripted into a build pipeline, a CMS workflow, or any automated process — teams that want completion suggestions integrated into custom tooling have no integration surface and will need a provider that exposes one.
- The passive suggestion model offers no ability to run multi-step tasks, draft from a prompt, or trigger actions — writers who need to generate a full first draft rather than complete sentences in progress will find the interaction model too narrow and reach for a dedicated generation tool.
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About
- Platforms
- macOS
- API Available
- No
- Self-Hosted
- No
- Last Updated
- 2026-06-02T04:00:38.578Z
Best For
Who it's for
- macOS-only writers with daily writing volume
- Users who prioritize privacy and on-device processing
- Power users managing multiple Macs (Pro tier)
- Writers who need per-app voice customization
What it does well
- Accelerating email and message composition
- Code and technical writing with app-specific instructions
- Daily writing across multiple applications on one Mac
- Writers who need consistent voice and tone across tools
- Users prioritizing on-device privacy
Integrations
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Frequently Asked Questions
- Is Cotypist free?
- Cotypist is a paid tool ($6/mo or $9/mo). A 30-day free trial is available.
- Is Cotypist open source?
- No — Cotypist is a closed-source tool. Source code is not publicly available.
- What platforms does Cotypist support?
- Cotypist is available on: macOS.
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Curated lists that include this category
Cotypist operates as a macOS menu-bar assistant that watches your active application and offers inline word completions you accept with Tab. The core workflow is: open any supported Mac app, start typing, and Cotypist proposes the next words based on both the content in front of you and any per-app instruction profile you have configured. There is no copy-paste loop, no sidebar to switch to — the suggestion appears inside the document you are already editing.
The per-app instruction system is the feature that separates it from a generic autocomplete layer. You configure a distinct set of style rules for each application — verbose and formal for one, concise and technical for another — and Cotypist applies the matching profile automatically when focus shifts between apps. Writers managing multiple clients or contexts across a single Mac can maintain distinct voices without manually switching modes.
Cotypist fits a specific profile: a solo writer or small-team contributor who works exclusively on macOS, types enough each day to make Tab-completion meaningful, and treats on-device privacy as a non-negotiable. The 100-words-per-day free tier exposes the tool quickly; anyone with genuine daily writing volume will hit that ceiling before lunch. Teams on Windows, or anyone who needs to integrate completions into an automated workflow via API, will find no supported path — the vendor describes no API surface and no cross-platform roadmap on the product page.
The paid tiers remove the daily word cap and, at the higher tier, add support for managing the tool across multiple Macs — relevant for writers who split time between a desktop and a laptop and want their per-app profiles to follow them.