Overview

Founded in 2009, Grammarly is now part of Superhuman. It pairs proofreading and style suggestions with tone detection, paragraph rewrites, a humanizer, and AI detector agents. Brand voice controls and team collaboration extend its use beyond individual editing.

Grammarly says it is trusted by over 40 million people and 50,000 organizations. Its content policy is a notable consideration for organizations: user content is not sold, monetized for advertising, or used to train third-party models. Its SOC 2 Type 2 report covers security, privacy, availability, and confidentiality controls.

For category comparisons, see our AI writing assistants, AI Writing Tools, Grammar checkers, AI Detection Software, and AI Grammar Checkers lists.

Key features

Proofreading, style suggestions, and tone detection address the editing stage: fixing text, refining its expression, and judging how it may sound. Paragraph rewrites and tone suggestions reach further into drafting, while the humanizer and AI detector agents serve distinct text-review needs. This breadth makes Grammarly more than a basic grammar checker, though the prompt allowance limits how often subscribers can lean on its AI tools.

Free includes 100 AI prompts per month; Plus raises that to 2,000 per member per month. That is a substantial increase for regular use, but teams should account for the per-member quota rather than treat it as a shared pool. English is the stated language support; a separate figure of 24 languages is also given, so buyers should confirm which functions apply across languages before relying on broad multilingual coverage.

Team collaboration and brand voice controls suit shared writing workflows. Enterprise adds confidential mode, roles and permissions, and data loss prevention, alongside cost center visibility and BYOK encryption. The SOC 2 Type 2 scope and content-use policy provide useful privacy and control context, but do not substitute for assessing an organization's own security requirements.

Pricing

Grammarly is freemium. Free costs ₹0 INR per month and is for individuals, with 100 AI prompts monthly. It is a sensible starting point for occasional editing, but the cap makes it a poor fit for frequent AI-assisted writing.

Pro costs 12.00 USD per month and includes 2,000 AI prompts per member per month. That larger allowance suits regular users, though teams need to account for each member's quota. Plus is for individuals or teams and is available only via local payment methods: ₹392 INR per member per month when billed annually, or ₹1,000 when billed monthly. The annual price is markedly lower per month, but requires an annual billing commitment; monthly billing costs more for flexibility. Plus also includes 2,000 AI prompts per member per month.

Enterprise uses custom pricing and is intended for larger organizations. It offers unlimited members, proactive AI across applications, dedicated support, BYOK encryption, custom roles and permissions, data loss prevention, and cost center visibility. It is the organizational option for buyers who need those controls, rather than a priced self-serve step up.

Support ranges from a help center and basic customer support to priority and dedicated support. Enterprise explicitly includes dedicated support; the other support levels are relevant to buyers weighing what kind of assistance they need.

Platforms

Grammarly has browser extension, desktop app, and mobile app access. The extension supports Chrome, Safari, Firefox, and Edge; mobile apps are available for iPhone, iPad, and Android. That coverage makes it a practical option for people who edit across devices, while Android and iOS are the named mobile platforms.

Who it's for

Choose Grammarly if you want proofreading and tone advice alongside rewriting tools, and expect to work across browser, desktop, and mobile. Free is appropriate for light use; regular users should compare Pro and Plus prompt limits and, for Plus, weigh local-payment availability and annual versus monthly billing. Teams can benefit from collaboration and brand voice controls, while larger organizations may find Enterprise's security controls and unlimited membership the more relevant fit.

It is less compelling if you only need occasional grammar checks and would rarely use more than the free prompt allowance, or if Plus's local-payment restriction rules it out. Buyers with specialized writing workflows should compare alternatives before choosing a broad general-purpose assistant.

Pros and cons

Broad editing-to-drafting toolkit: proofreading, style and tone suggestions, paragraph rewrites, a humanizer, and AI detector agents serve multiple writing stages.
Useful access coverage: browser, desktop, and mobile options include four named browsers and iPhone, iPad, and Android apps.
Privacy and organization controls: content-use commitments and SOC 2 Type 2 coverage are paired with Enterprise confidential mode, permissions, and data loss prevention.
Free AI use is capped: 100 prompts a month may run short for frequent users.
Plus payment terms narrow the choice: it is available only via local payment methods, and its lower monthly equivalent requires annual billing.
Enterprise requires a sales conversation: custom pricing makes it harder to compare costs directly with self-serve plans.

Alternatives

LanguageTool is worth comparing if you want a freemium grammar assistant with extension, iOS, macOS, and Windows support; its Basic plan has a 2,000-character per-text-field limit, while Premium Monthly allows 150,000 characters per field.

DeepL Write is an alternative with a free plan and Android, extension, iOS, macOS, and Windows support. Its Write Pro add-on costs 6.99 EUR per month when billed annually, with VAT included, and is available as an add-on to Individual or Team.

QuillBot may suit people seeking a freemium paraphrasing tool: its free plan covers paraphrasing up to 100 words, two modes, basic grammar, and limited humanizing and AI Detector use.

Wordtune is a freemium option with a free Basic tier allowing 10 rewrites and AI suggestions per day, three AI summarizations per month, and unlimited spelling corrections and grammar checks.

Trinka is another freemium writing tool to consider.

Paperpal is a freemium option with a Prime plan priced at 144.00 USD per year, billed annually, for regular research and writing needs.

ProWritingAid may fit writers comparing report-based editing limits: its free plan allows 500 words per report run, two report runs per day, 10 Rephrases per day, and three Sparks per day.

Sapling is a freemium alternative with a free plan that includes 2,000 AI detector characters per check, five AI detector files per batch, and 20 snippets.

Verdict

Grammarly is a strong choice for individuals and teams who want editing, tone guidance, and AI writing tools across devices, with meaningful privacy and organizational controls at the higher end. Its main drawback is that useful AI access depends on plan: Free is capped at 100 prompts a month, while Plus has restrictive local-payment availability and a costly monthly option. Choose it for the combined writing toolkit; look elsewhere if those limits or terms do not fit.

	Grammarly	Kerplexir
Free plan	Yes	No
Free trial		Yes
Paid from	$12/mo	$55/mo
Platforms	Android, iOS	api, Web
Free plan	Yes	No
Paid from	$12/user/mo
Brand voice controls	Yes	Yes
Language support	English
Team collaboration	Yes	Yes
Browser extension	Yes
Desktop app	Yes
Mobile app	Yes
Style suggestions	Yes
Tone detection	Yes
Languages supported	24
Long-form writing		Yes
SEO features		Yes

Grammarly vs Kerplexir

Grammarly

Kerplexir