Writing Review July 30, 2026 9 min read

Grammarly Review (2026): Features, Pricing, Pros & Cons

Grammarly is the browser-everywhere proofreader that catches what spellcheck misses. Here's what its AI features actually add, and whether Premium is worth it.

Grammarly by Grammarly Inc.

Overall Rating

4.3/5

Best For

Grammar, tone, and clarity checking across every app you write in

Difficulty

Beginner

Pricing

Free & Paid (Premium from $12/mo billed annually)

Quick summary: Grammarly is the browser extension and desktop app that quietly checks your grammar, tone, and clarity in Gmail, Slack, Docs, and pretty much anywhere else you type. Its AI generation features (rewrite, compose) are decent but not a reason to switch from ChatGPT or Claude. The real value is the always-on proofreading layer, and for teams, brand-voice consistency at scale.

Introduction

Grammarly has been the default grammar checker for over a decade, and its 2024-2026 push into 'agentic' AI writing has turned it from a red-squiggly-line tool into something closer to a full writing assistant — tone detection, full rewrites, and now Grammarly Authorship for tracking AI-assisted vs human writing.

We used it daily across Gmail, Google Docs, Slack, and LinkedIn to see how much value the AI layer adds on top of the core proofreading it's always done well, and where it still falls short of a dedicated writing model.

What is Grammarly?

Grammarly by Grammarly Inc.

Grammarly is a writing assistant that lives as a browser extension, desktop app, and Office/Google Docs plugin, checking your text in real time for grammar, spelling, punctuation, clarity, tone, and (on paid plans) style consistency against a set brand voice.

Beyond corrections, it now includes generative features: rewriting a paragraph in a different tone, drafting a reply from a few bullet points, and summarizing long threads or documents, all without leaving the app you're writing in.

For teams, Grammarly Business adds a shared style guide, brand tone settings, snippets, and analytics on writing quality across the organization — positioning it as a compliance and consistency layer as much as a proofreader.

PlatformsWebBrowser extensionmacOSWindowsiOSAndroidMicrosoft Office add-in

Key Features

What Grammarly actually does day to day.

Real-time grammar & spelling

Inline corrections as you type, across nearly any web app or desktop editor.

Tone detection

Flags how your message will likely land — confident, blunt, or too casual — before you send it.

Clarity rewrites

One-click suggestions to shorten wordy sentences and cut passive voice.

Generative AI prompts

Draft, reply, or rewrite text in-line using natural-language instructions.

Plagiarism checker

Cross-references your text against web and academic sources on Premium plans.

Brand tone & style guide

Business plans enforce a shared voice, terminology, and formatting across a team.

Grammarly Authorship

Tracks how much of a document was typed, pasted, or AI-generated.

Cross-platform coverage

Works in Gmail, Outlook, Slack, Docs, Word, and most text fields in the browser.

Ease of Use & Performance

Ease of use4.7

Performance4.2

Features4.2

Value for money4.0

Real-World Use Cases

Proofreading client emails before hitting send
Tightening a cover letter or LinkedIn post for clarity
Keeping a support team's tone consistent across tickets
Catching tone-deaf phrasing in a sensitive message
Cleaning up a college essay's grammar and structure
Enforcing brand terminology across a marketing team
Checking academic writing for accidental plagiarism
Rewriting a blunt Slack message before it causes a Slack war

Copy & Paste Prompts

Paste these straight into Grammarly and edit the bracketed parts.

Rewrite for a specific tone

Rewrite this message to sound more [confident/friendly/formal] without changing the facts.

Message:
[PASTE TEXT]

Tighten a wordy paragraph

Shorten this paragraph by at least 30% while keeping every key point. Cut hedging and filler words.

Paragraph:
[PASTE TEXT]

Draft a reply from bullet points

Turn these bullet points into a short, professional email reply:
- [POINT 1]
- [POINT 2]
- [POINT 3]

Tone: [friendly but direct]

Strengths & Weaknesses

Strengths

Works everywhere you type, with almost zero setup friction
Tone detection catches things a grammar checker alone would miss
Business plan's brand voice keeps large teams consistent
Genuinely improves grammar and clarity for non-native English writers
Low learning curve — it's invisible until it has a suggestion

Weaknesses

Generative rewrite quality lags dedicated tools like Claude or ChatGPT
Can be overzealous with suggestions on technical or creative writing
Browser extension occasionally conflicts with other web apps
Premium pricing feels steep for what's fundamentally a proofreader
Plagiarism checker is a Premium-only feature many expect for free

Pros & Cons

Pros

Excellent real-time grammar and clarity corrections
Tone detection is genuinely useful before sending sensitive messages
Works across almost every app via browser extension
Business tier enforces consistent brand voice at scale
Authorship feature is a smart answer to AI-content concerns
Free tier is usable for everyday writing, not just a trial

Cons

AI rewrite/compose features aren't as strong as a dedicated chat assistant
Higher price than many expect for proofreading alone
Can slow down or clutter some text editors
Plagiarism check and advanced style guide locked behind higher tiers

Pricing & Free Plan

Free

$0/ forever

Core grammar, spelling, and punctuation checks
Basic tone detection
Browser extension and desktop app
Limited AI prompts per month

Fine for everyday email and messages

Alternatives Compared

Tool	Best for	How it compares
ChatGPT	Drafting and generation	Better at writing from scratch; Grammarly is better at polishing what you already wrote.
Claude	Long-form editing	Stronger line-editing of full drafts; lacks Grammarly's everywhere-integration.
Notion AI	Writing inside your docs	Better if your writing already lives in Notion; weaker as a universal browser layer.
Jasper	Marketing content at scale	Built for brand-voice content generation rather than everyday proofreading.

Our Verdict

Still the best always-on proofreading layer, with AI bolted on

4.3/5

Grammarly's core strength hasn't changed: it catches grammar, clarity, and tone issues in the exact moment you're about to send something, across nearly every app you use. That everywhere-coverage is still hard to replicate with a chat-based assistant you have to copy-paste into.

The generative AI features are a useful bonus but not the reason to buy it — for genuine drafting and heavy rewriting, a dedicated model like Claude or ChatGPT does better work. Buy Grammarly for the proofreading net under everything you write; keep a chat AI open for the actual composing.

Frequently Asked Questions

Is Grammarly worth paying for?+

If you write professional emails, reports, or content regularly, Premium's clarity and tone rewrites plus plagiarism checking are worth $12/month. Casual users are well served by the free tier.

Does Grammarly use AI to generate text, not just correct it?+

Yes — Premium and Business plans include generative prompts for drafting, rewriting, and summarizing, though quality trails dedicated assistants like ChatGPT or Claude.

Is Grammarly free?+

Yes, there's a free tier covering core grammar and basic tone checks. Advanced features like plagiarism detection and full AI rewrites require Premium.

Does Grammarly work in Google Docs and Gmail?+

Yes, via browser extension it works in Gmail, Google Docs, Slack, LinkedIn, and most text fields, plus a dedicated Word add-in.

Can Grammarly detect AI-generated text?+

Grammarly Authorship tracks how much of a document was typed, pasted, or AI-generated, which is useful for schools and teams needing writing-process transparency, though it's not a foolproof AI detector.