Grammarly
Catch grammar and clarity issues as you write, then let built-in AI agents draft, rewrite, and complete tasks across your apps. Grammarly's parent company rebranded to Superhuman in October 2025.
The verdict on Grammarly: Catching grammar and clarity issues in real time as you write anywhere online Grammarly is the baseline check, not the ceiling, on writing tools. Pricing: Free / $12/mo Pro (annual) / Enterprise custom. Last reviewed: August 2026.
Best For
Catching grammar and clarity issues in real time as you write anywhere online
Standout Feature
Built-in AI agents now draft and rewrite across your apps, not just proofread
TL;DR
The baseline writing check most people should already have running.
Alternatives
Overview
Grammarly is a widely deployed AI writing assistant for real-time clarity and correctness improvements, active across email clients, browsers, document editors, and development environments through browser extensions and native integrations. Its core product has evolved well beyond spell-check: the AI analyzes writing for clarity, conciseness, tone, engagement, and delivery effectiveness, offering specific rewrites rather than vague suggestions. The Tone Detector identifies how a piece is likely to land with readers, formal, friendly, apologetic, confident, enabling intentional adjustments before sending.
Grammarly Business adds a centralized Style Guide that enforces organization-specific vocabulary, banned phrases, and formatting rules across all team communications, ensuring consistency at scale. The premium tier ($12/month) adds the full suite of tone, clarity, and engagement suggestions beyond basic grammar correction. For professionals who write extensively, client-facing emails, reports, proposals, support communications, Grammarly's browser-level integration means these improvements apply everywhere you write without changing your workflow.
Its primary limitation is that it excels at polishing existing writing rather than generating new content, which keeps it complementary to rather than competitive with generation-focused AI tools.
Our Take
It runs everywhere you type, catches what a tired eye misses, and the generative rewrite features are a reasonable bonus rather than the main event. If you're comparing it head to head with ChatGPT for actual drafting, that's the wrong comparison, Grammarly's job is proofreading what you already wrote, and it does that job well.
Trust & Data
Verified 2026-08
- Training on your data
- Opt-out availableTraining is on by default for Free, Premium, and individually-purchased Pro accounts; Enterprise/Business accounts sold through Sales default to off; all users can toggle it in account settings.
- Compliance
- SOC 2 Type II, SOC 3, ISO/IEC 27001:2022, ISO/IEC 27017:2015, ISO/IEC 27018:2019, ISO/IEC 27701:2019, ISO/IEC 42001:2023
- Retention
- Content used for troubleshooting or improvement is retained up to one year then deleted or de-identified; documents saved in the Grammarly Editor persist until the user deletes them or closes the account.
- Export
- Full export
Sources: grammarly.com/trust, grammarly.com/security, support.grammarly.com
As published by the vendor. Verify independently before purchase decisions.
Fit Score
How this is scoredGrammarly scored 1 to 5 on five dimensions for specific use cases, not a single overall rating. Part of a narrow pilot, not full-catalog coverage.
Catching grammar and clarity issues in real time as you write anywhere online
4.6/5- Capability
- 5/5
- Reliability
- 5/5
- Value
- 4/5
- Ease
- 5/5
- Compatibility
- 4/5
Works everywhere you write and highly accurate suggestions are named pros that map directly onto this, the tool's own bestFor. Value is held at 4 rather than 5 only because the premium plan is noted as somewhat pricey.
Using built-in AI agents to draft and rewrite text
3.8/5- Capability
- 3/5
- Reliability
- 4/5
- Value
- 4/5
- Ease
- 4/5
- Compatibility
- 4/5
Our own take is explicit here: comparing Grammarly's generative features head to head with ChatGPT is the wrong comparison, and the documented con agrees (generative features are basic compared to ChatGPT), which is why Capability is markedly lower for this specific use case than for proofreading.
Editorial judgment grounded in this tool's own published pricing, features, and our existing pros and cons, not a certification or a measured benchmark.
Key Features
- Grammar and spelling checks
- Tone detection
- Plagiarism checker
- Generative AI co-creator
- Browser extension
- • Works everywhere you write
- • Highly accurate suggestions
- • Improves overall writing quality
- • Generative features are helpful
- • Premium plan is somewhat pricey
- • Can be overly pedantic
- • Generative features are basic compared to ChatGPT
People Also Use
Other Writing tools builders reach for alongside Grammarly.
QuillBot
Paraphrase text in unlimited style modes while checking it for grammar errors, plagiarism, and AI-detection risk in one pass. AI Detector and AI Humanizer are now bundled into every premium plan.
DeepL
Translate text and documents that actually read naturally, not like they came out of a machine.
Grok
Get real-time answers pulled from X posts, strong reasoning, and a direct tone that doesn't hedge. Grok 4.5 brings Opus-class coding and agentic performance at a lower price.
Claude
The model serious writers and researchers reach for when accuracy matters more than speed. Opus 5 is now the default, with voice mode expanded across every tier.
Wordtune
Rewrite an awkward sentence into multiple tone-adjusted alternatives instantly, and compress long documents into digestible summaries.
Hemingway App
Score the readability of your writing and flag wordy sentences, passive voice, and complex words, with an optional AI-assisted Plus tier for grammar fixes and rewrites.
Workflows Using This Tool
Step-by-step playbooks that put Grammarly to work.
From the Blog
Coverage and comparisons that mention Grammarly.