Grammarly Review 2026: Still Worth It After the Superhuman Rebrand?

The question we get asked more than any other about Grammarly: “Why would I pay for it when ChatGPT can check my writing for free?”

It’s a fair question, and the honest answer is that the two tools do different jobs. But there’s a second question that matters more in 2026: what exactly are you buying now? Grammarly’s parent company renamed itself Superhuman in late 2025, Premium became Pro, a whole AI-agent layer called Superhuman Go got bolted on, and the cheap small-team Business plan quietly disappeared. The product you’d have researched a year ago isn’t the product you’d sign up for today.

This review is based on Grammarly’s published plans and documentation, third-party pricing trackers, and coverage of the rebrand — not on a hands-on trial. Where sources disagree on price, we say so.

What Changed in 2026

If you last looked at Grammarly in 2025, three things are different.

The company is now called Superhuman. In October 2025 Grammarly rebranded its parent company to Superhuman, taking the name from the AI email client it had acquired earlier that year. The Grammarly writing assistant itself keeps the Grammarly name — you are not being asked to learn a new product. But the company now sells a four-part suite: Grammarly (writing), Superhuman Mail (email), Coda (docs and workspace), and Superhuman Go (an AI agent layer that reads context across your apps).

Premium is now Pro. Same broad feature set, new name, and it now carries the Coda and Superhuman Go entitlements alongside the writing features.

Superhuman Go stopped being free. It was available at no extra cost to all users through 1 February 2026 as an introductory period. It’s now part of the paid tiers.

The practical upshot: if you only want a grammar checker, you are now buying a bundle that includes a workspace tool and an agent layer you may never open. Whether that’s added value or added noise depends on whether you’d have paid for Coda anyway.

What Grammarly Does (and What It Doesn’t)

Grammarly is a real-time writing assistant. It sits in your browser, your desktop apps and your phone keyboard, flagging errors, awkward phrasing and tone issues as you type.

That timing distinction is the whole product. Grammarly works while you write. ChatGPT and Claude work before or after. You paste text into a chatbot and ask it to improve your draft; you don’t paste anything into Grammarly, because it’s already there.

For the dozens of short pieces most professionals write daily — emails, Slack messages, quick posts, form responses — the real-time approach is far more practical than copying text into a chatbot. Nobody tab-switches to ChatGPT for their thirty-seventh email of the day.

Grammarly does not write content for you in any serious way. The generative features exist, but they aren’t competitive with ChatGPT or Claude for drafting. That’s fine — Grammarly’s value is in making the text you’ve already written cleaner, not in producing it.

The Browser Extension

The browser extension is Grammarly’s genuine moat. Install it once and it works across Gmail, Google Docs, LinkedIn, X, WordPress, Notion and effectively every other web-based tool with a text field, plus desktop apps and mobile keyboards.

Two known limitations worth flagging before you commit: canvas-based apps (Figma being the obvious example) don’t support text-input extensions at all, so Grammarly can’t reach them, and the extension can occasionally conflict with other extensions that modify text fields — password managers and some CMS plugins are the usual culprits. Grammarly supports per-domain disabling, which resolves this.

What the Free Plan Covers

Grammarly’s free tier remains one of the better free tools in any category. It covers:

• Spelling — including contextual misspellings (“their” vs “there”)
• Basic grammar — subject-verb agreement, punctuation, article usage
• Punctuation — comma splices, missing full stops, misused semicolons

For a lot of people this is genuinely enough. If your writing is mostly internal messages and you just want typos caught before you press send, the free plan does that job and you can stop reading here.

What Pro Adds

Pro adds three things that matter for professional writing:

Clarity and conciseness suggestions

This is the main reason to upgrade. Pro flags wordy phrasing, passive voice, unclear antecedents and over-complex sentences. It is a suggestion engine, not an authority — Grammarly has a documented bias toward shorter sentences, which is not always right for your context. Expect to ignore a meaningful share of what it proposes and to develop a feel for which categories are reliable.

Tone detection

Grammarly labels the overall tone of your writing — “formal”, “friendly”, “confident”, “concerned” and so on. It sounds gimmicky and it is legitimately useful, particularly for catching an email that reads as demanding when you meant direct. It needs roughly 50+ words of context to be reliable; on short messages it doesn’t have enough to work with.

Plagiarism checking

Pro includes a plagiarism checker that scans against web pages and academic papers. It’s a reasonable first pass. It is not in the same league as Turnitin or Copyscape — smaller database, less granular matching, weaker academic coverage. Treat it as a sanity check, not a clearance.

Superhuman Go and Coda

New for this cycle. Go is an agent layer that reads context across your connected apps and suggests actions; Coda is a full docs-and-workspace tool. Both now come with Pro. If you already pay for a Notion-style workspace, this is a real consideration — see our Notion AI review for the comparison point.

Pricing (checked August 2026)

Pricing checked August 2026. A caveat worth stating plainly: third-party pricing trackers disagree on the exact figures, particularly on the Business tier, and Grammarly runs frequent promotional discounts (20% off the annual plan is a recurring offer). Treat the table above as the shape of the pricing, and check the current rate on the plans page before you buy.

The gap between annual and monthly is the thing to actually pay attention to. At roughly £10/month annually versus roughly £30/month rolling, Grammarly is priced to push you onto a year’s commitment. If you’re not sure you’ll use it daily, run the free plan for a month first rather than paying the monthly premium to find out.

The Business plan change matters

The old structure had a Business tier at around £11/member/month with a three-seat minimum — steep, but reachable for a small team. That’s gone. The current Business tier bundles Superhuman Mail and prices accordingly, and Pro now supports large user counts on its own before you’re pushed to a custom Enterprise quote.

For a three-person UK agency, the practical answer in 2026 is usually three individual Pro seats rather than a Business plan, unless you specifically want Superhuman Mail or centralised style-guide enforcement.

Grammarly vs ProWritingAid

ProWritingAid remains the main alternative and it’s cheaper, with a lifetime purchase option that Grammarly doesn’t offer.

ProWritingAid is the stronger tool for long-form work. Its reports on sentence structure, pacing, dialogue and readability go deeper than anything Grammarly produces. If you’re writing books, academic papers or long-form journalism, it deserves serious consideration.

Grammarly wins on convenience for everyday professional writing. The browser extension is smoother, the interface is cleaner, and the real-time suggestions are faster and less intrusive. Most professionals aren’t writing novels, they’re writing emails — and Grammarly is built for that. Our full Grammarly vs ProWritingAid comparison goes through this in detail.

Who It’s For

Worth paying for if:

• You write client-facing content daily — emails, proposals, posts
• You want error-checking that follows you across every app without changing your workflow
• Tone and professionalism carry real commercial weight in your communication
• You’d get use out of Coda and would otherwise pay for a workspace tool

Skip it if:

• You mainly write long-form and want structural feedback — look at ProWritingAid
• You want an AI content generator — use ChatGPT or Claude
• You write almost entirely inside platforms with decent built-in checking
• The free plan already covers what you need, which for a lot of people it does

The AI Elephant in the Room

Yes, you can paste an email into ChatGPT and ask it to fix the errors. It works. But look at what that workflow actually involves: write, copy, switch tab, open ChatGPT, paste, prompt, wait, read, copy back, switch tab, paste.

For a blog post, fine. For routine daily correspondence, nobody does that. They press send and hope.

Grammarly removes the hoping. Corrections appear inline, before you send, with no tab-switching and no prompting. That’s the entire value proposition and it holds up perfectly well in a world full of capable chatbots. The two categories are complements, not competitors: draft and restructure in Claude or ChatGPT, catch errors everywhere else with Grammarly.

The Verdict

Grammarly is still the best real-time writing assistant available, and the free plan is still one of the best free tools in our recommended stack. At roughly £10/month on annual billing, Pro is straightforward value for anyone who writes professionally every day.

The reservations are commercial rather than technical. The Superhuman rebrand has bundled in products many buyers won’t use, the monthly rate is punitive enough to feel like a trap, and small teams have lost their cheap route in. None of that changes what the writing assistant does — it just means you should check the current price yourself and be honest about whether the free tier already solves your problem.

Start free, install the extension, and see how often you accept suggestions. If it’s daily, the upgrade will feel obvious. If it isn’t, you’ve lost nothing.