Grammarly vs ProWritingAid on Mac

The short answer, and almost every reviewer agrees on it: pick ProWritingAid if you are editing a manuscript or a long report, and pick Grammarly if you mostly write email, messages and everyday documents. ProWritingAid goes deep with more than twenty writing reports and a real Scrivener integration. Grammarly is faster, lighter and better at catching mistakes while you type. The 2026 price rise at ProWritingAid makes that choice sharper than it was a year ago. A third option is worth knowing before you subscribe to either: Charm, our own Mac app, corrects mechanics inline as you type, runs on-device, and costs $9.99 once.

What is the core difference between them?

ProWritingAid is an editing workshop; Grammarly is a proofreader that follows you around. ProWritingAid wants you to stop, open a document, and work through reports on pacing, sentence variety, repeated words, sticky sentences, readability and dialogue tags. It is analysis you sit down for, not background help.

Grammarly wants you to keep typing. It watches the field you are in, underlines errors as they appear, and offers a rewrite when a sentence is tangled. Both catch the obvious spelling and grammar mistakes competently, so the real question is not accuracy, it is how much of your attention each one expects in return. Reviewers at Zapier land in the same place.

Which is better for a novel or long manuscript?

ProWritingAid, comfortably. It was built for book-length work and it shows in three concrete ways. It opens Scrivener projects directly on macOS, so you are not copying chapters in and out of a web editor. It handles long documents without nagging you to split them. And its reports surface the problems that only appear at length: an overused verb, a chapter of near-identical sentence rhythms, dialogue tags that all read the same.

Grammarly can proofread a novel, but it treats each sentence as a local problem. It will not tell you that you have written "just" four hundred times. That is why Kindlepreneur, a site aimed at self-publishing authors, recommends ProWritingAid for manuscripts. Our roundup of Mac writing tools for authors agrees.

Is ProWritingAid worth the 2026 price?

It depends on whether you use the reports. ProWritingAid raised its prices in 2026: Premium now starts at roughly $120 a year, up from the long-standing $79 or so, with Premium Pro around $144 a year and monthly billing considerably higher. Lifetime licences still exist, which no longer have an equivalent at Grammarly.

If you are an author who runs every chapter through the reports, the maths still works, and the lifetime option remains the best long-run value in this category. If you bought ProWritingAid years ago mainly as a cheaper Grammarly, the rise removes that reason. Check the live page before you commit.

Put the numbers side by side: Grammarly Pro is around $144 a year, ProWritingAid starts around $120 a year with lifetime licences in the hundreds, and Charm is $9.99 once for three Macs. The gap only matters if the cheaper tool does what you need, and Charm has no reports and no rewriting.

How much does Grammarly cost, and what is Superhuman?

Grammarly has a free tier that covers spelling, grammar, punctuation and a monthly allowance of AI prompts, and a Pro tier at around $12 a month billed annually. The free plan is genuinely usable, so many people never need to pay. Pro adds rewriting, tone adjustment, plagiarism detection and unlimited suggestions.

One piece of naming confusion is worth clearing up. Grammarly's parent company rebranded to Superhuman in October 2025 after acquiring the email client of the same name. The Grammarly product still exists under its own name and nothing changed for existing subscribers, so if you see Superhuman on an invoice, it is the same company.

Which works better across Mac apps?

Grammarly has the wider everyday reach on macOS. Its desktop app and browser extension cover Mail, Slack, Google Docs, most web forms and many native apps. That breadth is why it suits people whose writing is scattered across a dozen places a day.

ProWritingAid also offers a desktop app, browser extension and integrations with Word, Scrivener and Google Docs, but its centre of gravity is its own editor, where the reports live. Neither runs on your Mac alone: both send text to their servers to analyse it, which matters if you handle confidential material. We covered that in detail in is Grammarly safe on a Mac.

So which should you pick?

Choose ProWritingAid if your writing arrives in long pieces, if you use Scrivener, or if you want to understand your habits rather than just fix errors. The lifetime licence is its strongest argument now that annual pricing has climbed.

Choose Grammarly if your writing is short, frequent and spread across apps. Start free and upgrade only if you want the rewrite and tone tools. If you are still weighing up the wider field, our guide to the best grammar checker for Mac puts both in context alongside the alternatives.

A third option if you only want the mechanics fixed

Both tools above are editors: they show suggestions and wait for you to accept them. If what you want is typos corrected inline as you type, with no panel and no review step, that is a different kind of tool. Charm is our Mac app for exactly that: it fixes spelling and grammar mechanics in place in native Mac apps, runs entirely on-device, and costs $9.99 once. In browsers and Electron apps it works differently, you select the text and press Option-Command-V. It never rewords your sentences, and it produces no reports, so it is not a replacement for ProWritingAid if manuscript analysis is what you came for. For the head-to-heads, see Charm vs Grammarly and Charm vs ProWritingAid.

Frequently asked questions

Can I use Grammarly and ProWritingAid at the same time?

You can install both on a Mac, but running both live in the same text field is a poor experience. The two panels compete for the same underline space and the same sidebar, and their suggestions often contradict each other. A better pattern is to keep Grammarly enabled for everyday typing and open ProWritingAid only when you sit down to edit a manuscript or a long report inside its own editor.

Which one is better for academic writing?

ProWritingAid usually suits academic work better. Its reports on sticky sentences, passive voice, transitions and readability map closely onto the things supervisors mark down, and it handles long documents without asking you to work in chunks. Grammarly is still useful for a final pass on clarity and punctuation, and both offer plagiarism checking on paid tiers, though Grammarly's is the more established of the two.

Does ProWritingAid work with Scrivener on Mac?

Yes. ProWritingAid has long offered Scrivener support on macOS, which is one of the main reasons novelists choose it. You open a Scrivener project through ProWritingAid, edit with the reports available, and save the changes back. Grammarly has no Scrivener integration, so Scrivener users typically copy text into the Grammarly editor instead, which is slower for book-length work.

Is Grammarly's free plan good enough?

For everyday email, messages and short documents, the free plan covers a lot. It catches spelling, basic grammar and punctuation across the browser and the Mac app, and it includes a limited monthly allowance of AI prompts. The paid tier is mainly about rewriting, tone adjustment, plagiarism detection and unlimited suggestions, so it earns its keep only if you write at volume or need those specific tools.

Did Grammarly change its name?

The parent company rebranded to Superhuman in October 2025, after acquiring the Superhuman email client. The Grammarly product name still exists and the writing assistant continues under it, so nothing about installation or your subscription changed. If you see Superhuman branding on invoices or in company news, it refers to the same organisation behind Grammarly.