Cotypist vs WunderType: Which AI Writing Tool Fits Your Mac?

There are two philosophies of AI writing help on the Mac right now. One says the AI should write with you, predicting your next words as you type so you can accept them with a tap of the Tab key. The other says the AI should stay out of the way until you ask for it, then fix or transform what you've already written in a single keystroke.

Cotypist is the best-known example of the first approach. WunderType is built entirely around the second. Because they look superficially similar — both are lightweight, native macOS apps that bring AI into every text field on your Mac — people regularly weigh one against the other. This Cotypist vs WunderType comparison goes through the concrete differences: how each one works, what each one costs, how much of your Mac they occupy, and which kind of writer each one actually suits. We'll also cover Typeahead and Cotabby, the two apps most often mentioned in the same breath as Cotypist.

One note before we start: if you're not really comparing but rather looking to replace Cotypist, we've covered the full landscape separately in our guide to the best Cotypist alternative for Mac. This post is the neutral head-to-head.

Cotypist and WunderType at a Glance

	Cotypist	WunderType
Approach	Autocomplete: predicts your next words as you type, Tab to accept	Transformation: select existing text, press a shortcut, it's rewritten in place
AI options	Local models only (larger model catalog on the Pro plan)	On-Device AI (Apple MLX local models), local via Ollama, or cloud via OpenAI or OpenRouter with your own API key
Pricing model	Subscription: free tier capped at 100 completed words/day, paid plans from $8/month	One-time purchase on the Mac App Store, no subscription
Memory usage	1–2 GB while active (a local model runs continuously)	Under 5 MB (calls the AI only when you trigger it)
Privacy	On-device processing, text never leaves your Mac	Zero analytics, no accounts, no clipboard monitoring, App Sandbox; local processing or direct-to-API cloud with no middleman server
Platform requirements	Apple Silicon only, macOS 14+	macOS 15+, native Swift/SwiftUI
Works in	Most Mac apps with standard text fields	Any Mac app where you can select text — Mail, Notes, Slack, Chrome, VS Code, and more

The single most important row is the first one. Everything else — pricing, memory, model choice — flows from the fact that Cotypist works while you type and WunderType works after you type.

How the Two Approaches Feel in Practice

Spec tables only get you so far. Here's how each app behaves in two everyday situations.

Drafting an email

With Cotypist, you start typing in Mail and grayed-out suggestions appear ahead of your cursor. When a suggestion matches what you were about to say, you hit Tab and jump forward half a sentence. On routine, formulaic email — scheduling, confirmations, polite boilerplate — this is genuinely fast. The trade-off is attention: you're constantly reading and judging suggestions while composing, which some people find energizing and others find distracting. Because a language model runs continuously in the background, this speed costs 1–2 GB of memory whether or not you accept a single suggestion.

With WunderType, nothing happens while you draft. You write the email in your own words, as messily as you like. Then you select the text, press your shortcut for Make Formal or Improve Writing, and the selection is replaced in place with the polished version. No copy, no paste, no switching to a chat window. The app idles at under 5 MB and only does work at the moment you invoke it.

Fixing a Slack message

You've typed a rushed reply with two typos and a run-on sentence. Cotypist can't help here — autocomplete predicts what comes next; it doesn't revise what's already written. You'd fix it by hand or retype it.

This is WunderType's home turf: select the message, hit the Correct Grammar shortcut, and the cleaned-up text lands right back in the Slack input box. The same works for shortening a rambling paragraph (Make Concise) or defusing a message that reads too blunt (Make Casual). Beyond the five built-in modes, you can add unlimited custom prompts — translate to German, turn bullets into prose, rewrite for a client — each with its own keyboard shortcut. If system-wide proofreading is your main use case, our guide to grammar checking on the Mac goes deeper.

The honest summary: Cotypist accelerates the typing itself; WunderType upgrades the result. Those are different problems, and which one you have determines which app wins for you.

Cotypist Pricing Explained

This is the question people search most often, and the answer changed recently: Cotypist has moved out of its free beta into paid plans. As of this writing, the lineup looks like this:

• Free — capped at 100 completed words per day (only suggestions you actually accept with Tab count against the cap), with a 30-day Pro trial included.
• Plus — $8/month, or $72/year (which works out to $6/month billed annually). Unlimited completions, full autocorrect, and custom writing instructions on one Mac.
• Pro — $12/month, or $108/year ($9/month billed annually). Adds the full model catalog, per-app instructions, clipboard awareness, and covers up to three Macs.

That's $72–$144 per year depending on plan and billing. Reaction to the subscription has been mixed — when the pricing page went live, a common objection in Mac communities was paying monthly for software that runs entirely on your own hardware, since there are no ongoing cloud costs for the developer to pass along. Others consider it fair for an app under active development. Both positions are reasonable; just go in knowing that meaningful daily use effectively requires a paid plan, because 100 accepted words is a very low daily ceiling.

WunderType's model is the opposite: a one-time purchase on the Mac App Store. There's no account, no tier system, and no completion counter. If you use the On-Device AI engine (Apple MLX local models, added in version 1.5) or a local model via Ollama, there are no ongoing costs at all. If you connect a cloud provider — OpenAI or OpenRouter — you pay them directly for API usage with your own key — stored in the macOS Keychain, sent straight to the API with no middleman server.

What About Typeahead and Cotabby?

Cotypist's success has spawned a small ecosystem of autocomplete rivals, and two names come up constantly: Typeahead and Cotabby. If you've decided you want the autocomplete style of assistance and are weighing Typeahead vs Cotypist or Cotabby vs Cotypist, here's the short, factual version.

Typeahead

Typeahead offers local AI sentence completions across your Mac, much like Cotypist, but with a one-time price: as of this writing it's $79 once, with unlimited usage, no caps, and lifetime updates. Notably, it also runs on Intel Macs (with a smaller optimized model), whereas Cotypist is Apple Silicon only. Typeahead's pitch is essentially "Cotypist's workflow without the subscription" — if the $8–$12 monthly pricing is your only objection to Cotypist, Typeahead is the closest like-for-like swap.

Cotabby

Cotabby is the free, open-source entry (AGPL-3.0, on GitHub). It does local AI autocomplete in macOS text fields using Apple's built-in models or downloadable local models, with Tab to accept, and adds extras like typo correction and snippet expansion. It requires macOS 14 or later, and there's no account, subscription, or telemetry. As a community project it's less polished than Cotypist, but for people who searched "Cotypist open source" — a surprisingly common query — Cotabby is the direct answer.

Note what all three of these apps have in common: they're variations on one idea, autocomplete-while-typing. WunderType isn't a fourth variation — it's the other philosophy entirely. That's why comparing Cotypist vs WunderType is less about feature checklists and more about which moment of the writing process you want help with.

Can You Use Both?

Yes — and this is the part most versus posts skip. Because Cotypist works during composition and WunderType works on selected text afterwards, they don't conflict. You could let Cotypist (or Typeahead, or Cotabby) accelerate your first draft, then select the result and run WunderType's Improve Writing pass before sending. The two apps never fight over the same keystroke, since one lives on Tab and the other on shortcuts you define yourself.

The practical caveats are cost and memory. Running both means budgeting for Cotypist's subscription alongside WunderType's one-time price, and keeping a 1–2 GB model resident in RAM for the autocomplete side. On a 16 GB or larger Apple Silicon Mac that's usually fine; on a base-spec machine you'll notice it. If you'd rather get lightweight rewriting from something already built into macOS, it's also worth reading how WunderType compares to Apple Intelligence Writing Tools before adding any third-party app at all.

Verdict: Which One Fits Your Mac?

Choose Cotypist if you type a high volume of routine, predictable text and want raw typing speed. Its suggestions are the most polished in the autocomplete category, and if the subscription fits your budget — and you're on Apple Silicon — it does what it promises. If you want that workflow without recurring fees, look at Typeahead; if you want it free and open source, look at Cotabby.

Choose WunderType if your problem isn't typing speed but text quality: grammar slips, wordy drafts, wrong tone for the audience. You get five built-in modes plus unlimited custom prompts in every Mac app, your choice of on-device, local, or cloud AI, a footprint under 5 MB, and a one-time price with no accounts or telemetry. It's the same select-and-fix philosophy that makes it a strong Grammarly alternative, but with full control over where your text is processed.

In the Cotypist vs WunderType decision, the real question is simple: do you want AI finishing your sentences, or improving them? If it's the latter, you can try the answer in about a minute.

Download WunderType from the Mac App Store — one purchase, every Mac app, your choice of AI.