The best autocomplete apps for Mac in 2026

If you've ever watched a developer's editor finish their code before they typed it and thought "I want that, but for email" — 2026 is the year you can actually have it. Inline autocomplete has finally arrived for the rest of the Mac: the messages, the replies, the posts, the docs. Not a chatbot you visit, but ghost text that appears right where your cursor is and gets out of your way when it's wrong.

I build on-device language models for a living, and I make one of the apps on this list. I'll be upfront about that — and I'll try to be fair about the rest, because the honest truth is that the category is small, the good options are all genuinely good, and which one fits depends on how you write and what you care about.

Here's the lay of the land, what each tool actually does, what it costs, and how to choose.

First, what "autocomplete for Mac" even means now

The word "autocomplete" gets stretched across three different things. Before you pick a tool, it helps to know which one you actually want.

Inline AI prediction — a model that reads the sentence you're writing and offers the next word or the rest of the line, as faint ghost text, in any app. You press a key to accept. This is the new category, and it's what this article is about.
Text expanders — tools like TextExpander, aText, or the open-source Espanso. You type a short trigger (;addr) and it expands to canned text (your address). Brilliant for boilerplate, but it doesn't predict anything — you have to define every snippet yourself.
Cloud chatbots and grammar tools — ChatGPT, Claude, Grammarly. Powerful, but they live in another window or a sidebar. You stop, ask, wait, and paste. Different job, different rhythm — and your text goes to a server.

This guide is about the first category: prediction that happens inline, system-wide, while you type. If you want canned snippets, get a text expander. If you want to draft a whole essay from a prompt, open a chatbot. If you want your own sentences to finish themselves as you write them, read on.

What to look for

A few dimensions separate a tool you'll keep from one you'll uninstall in a week:

Does it work everywhere? A predictor that only fires in one app is a toy. You want one system-wide tool, no per-app setup.
Whole sentences or just next-word? Short next-word guesses are a nice nudge. Full-line and full-sentence completion is what actually saves you keystrokes.
On-device or cloud? If the model runs on your Mac, your words never leave it. If it's cloud, every keystroke is a network request — think about what that means for work email and private messages.
Does it learn your voice? Generic suggestions read like a robot. The good tools pick up your vocabulary, names, and tone so the words sound like you.
How do you pay? Subscription or one-time. Over a few years this is the difference between a coffee and a car payment — more on that below.
Does it need an account? Every account is another login, another email in someone's database, another thing to cancel.

Hold those six up against any tool and the choice gets clear fast.

The contenders

TypeTab — one-time license, fully on-device

I'll start with mine, then get out of the way. TypeTab finishes your sentences inline in every Mac app — Mail, Messages, Slack, Notion, your browser, docs. Suggestions appear as ghost text; press Tab for the next word or Ctrl+E to take the whole line. Keep typing and it quietly updates. It also catches typos inline.

Every prediction runs on the Apple Neural Engine, on your Mac. Nothing is uploaded, nothing trains a model, and it works on a plane with the Wi-Fi off. There's no account and no sign-in. It learns your vocabulary and style over time so the suggestions read like you.

Pricing is the part people notice: it's a one-time license, not a subscription. Free to try (your first 100 word completions and 20 full-line completions, no card), then $49 once — currently $24.50 during launch — for unlimited use on up to 3 Macs.

Best for: anyone who writes all day and would rather pay once; people who care about privacy; non-native English writers.
Watch out for: macOS 14+ and Apple Silicon only; 16 GB of memory recommended for the smoothest experience.

Cotypist — the subscription option

Cotypist is the most direct alternative, and it's a well-made app. It's also fully on-device on Apple Silicon, works across apps on macOS 14+, completes whole lines, learns your style, and accepts with Tab. If you've been looking at TypeTab, you've probably seen Cotypist too.

The differences are about the business model and a few details. Cotypist is a subscription: a free tier (100 completions a day, with an email sign-up to keep using it), Plus at $6/mo or $72/yr for one Mac, and Pro at $9/mo or $108/yr for up to three. Full autocorrect lives on the paid tiers; the free tier shows a typo indicator. (Pricing verified May 2026 — check their site for current numbers.)

Best for: people who prefer a monthly plan, or who want to pay only while they're actively using it.
Watch out for: the recurring bill, and the account requirement on the free tier.

I wrote a fuller, side-by-side breakdown in TypeTab vs Cotypist if you're deciding between the two.

macOS built-in predictive text — free, and fine for a little

Since Sonoma (macOS 14), Apple added inline predictive text to the system. It's free, on-device, and already on your Mac. For short, next-word predictions in Apple's own apps, it does the job.

The limits show up quickly, though. It only fires in apps updated for Apple's API — Mail, Notes, Messages, TextEdit and a handful of others — not everywhere you type. It offers short next-word or short-phrase predictions, not full sentences. It's English-keyboard only, and it doesn't learn your personal vocabulary the way a dedicated tool does.

Best for: people who only want a light nudge in Apple's apps and don't want to install anything.
Watch out for: the coverage gaps — the moment you're in Slack, Notion, or the browser, you're on your own.

The adjacent tools (and why they're not the same thing)

You'll see these recommended in "autocomplete" roundups, so it's worth saying plainly what they are:

Text expanders (TextExpander, aText, Espanso): great for repeated boilerplate, but they expand snippets you define — they don't predict your next sentence. Many people run one of these alongside a predictor.
Cloud writing tools (Grammarly, ChatGPT, Claude): excellent for drafting and editing, but they're not inline-everywhere prediction, and your text goes to a server. If you want to write faster without outsourcing your voice to a chatbot, that's a different workflow.

Useful tools, different jobs. Don't let a listicle talk you into a snippet manager when what you wanted was prediction.

How to choose

Strip away the marketing and it comes down to a few honest questions:

Want it free and you live in Apple's apps? Start with the built-in predictive text. If you keep wishing it worked in Slack or wrote full sentences, you've outgrown it.
Prefer a subscription, or only want to pay while you use it? Cotypist is the polished subscription pick.
Write all day and would rather pay once? Do the math: a subscription runs roughly $70–$110 every year, forever. A one-time license is, well, once. That's the case for TypeTab.
Privacy is non-negotiable? Choose anything that's genuinely on-device — and confirm it. "Private" in marketing copy should mean "your text never leaves the Mac," not "we encrypt it on the way to our server."

The quick version

The category is finally good. Apple's built-in option is a free taste; Cotypist and TypeTab are the two serious, fully on-device tools, and they're more alike than different on the core experience. The real fork in the road is how you want to pay — every month, or once.

If you want to feel it for yourself, TypeTab is free to try with no account and no card — 100 word completions and 20 full-line completions on the house. Type a few emails with it and you'll know within a day whether finishing your own sentences is the upgrade you've been missing.