Grammarly

An AI writing assistant that fixes English grammar and sentences

Writing/Productivity

CurrencyUSDKRWEUR

Personal starting price$15+Official price in USD
Free tierFree plan available
Korean supportAverage

Price checked 2026-10-19, source: superhuman.com/plans. Prices and benefits may change. Check the official site before you pay.

Some information has not yet been verified against official sources. Please check the official site before you pay.

Pros

  • English proofreading anywhere in browsers and apps
  • Useful for business English

Cons

  • Advanced style and tone suggestions and paragraph rewriting are limited to 6 languages including English (Korean gets only spelling, basic grammar and translation)
  • Monthly billing is expensive

These are opinions compiled by Pickx from public sources.

At a glance

Grammarly is an AI writing assistant that corrects English grammar, spelling and style in real time almost everywhere you write, including browsers, email, Word and Slack. After its operator renamed the company Superhuman in October 2025, Grammarly is also sold in a bundled plan with Superhuman Go (AI assistant), Docs (formerly Coda) and Mail. It is especially useful for students and office workers who often write English emails/reports/papers. Korean is also a supported language, with spelling/basic grammar correction (red underlines) and inline translation, but advanced grammar/clarity/fluency/tone suggestions (blue underlines) and paragraph rewriting are supported only in 6 languages: English, Spanish, French, German, Portuguese and Italian.

Full model list

Grammarly does not disclose "models" you can choose. Below is the list of AI features and agents you can currently use.

Model/featureTypeFeaturesPlans that can use it
Real-time proofreading (Proofreader)Proofreading
  • Shows spelling/grammar/punctuation errors as you write
  • Automatic fixes
  • Free (limited)
  • Unlimited on Pro and above
  • Tone detection
  • Tone adjustment
Proofreading/style
  • Shows what tone your writing reads as (free)
  • Change to the tone you want (paid)
  • Detection: Free
  • Adjustment: Pro and above
  • Full sentence rewriting
  • Fluency suggestions
Proofreading/writing
  • Rewrites awkward sentences whole into natural English
  • Polishes non-native expressions
  • Free (limited)
  • Pro and above
Generative AI prompts (write/reply/summarize)Writing
  • Generates drafts/replies/summaries from instructions
  • Free 100 per month
  • Pro 2,000 per month
  • Enterprise unlimited
  • Free
  • Pro
  • Enterprise
  • Translation
  • Multilingual rewriting
Translation/proofreading
  • Paragraph translation and rewriting in several languages (unlimited on paid plans)
  • Korean gets real-time spelling/basic grammar correction and inline translation
  • Advanced grammar/style suggestions and paragraph rewriting only in supported languages (6 including English)
  • Free (limited)
  • Unlimited on Pro and above
AI Detector (detects AI-written text)Checking agentDetects parts of the text that look AI-writtenPro and above
Plagiarism CheckerChecking agent
  • Detects sentences that overlap with web/academic sources
  • The cell in the official price table is blank, so inclusion in Free is unverified
Pro and above (per the Grammarly price table)
  • AI Grader
  • Reader Reactions
  • Citation Finder
  • Paraphraser
  • Humanizer
Writing agents
  • Agents for assignments/writing: estimated grading
  • predicting reader reactions
  • finding citation sources
  • paraphrasing
  • reducing AI traces
  • Free (limited)
  • Pro and above (detailed limits per plan not disclosed officially)
Expert ReviewWriting agent
  • Former feature
  • Controversial for AI feedback attributed to the names of real writers/experts
  • Disabled in March 2026
Discontinued
AuthorshipWriting process record
  • Records whether text was typed, pasted or AI-generated and shows it as a report
  • For submitting student assignments
Not listed separately in the price table (needs checking)
  • Style guide
  • Brand tone
  • Snippets
Team writing managementApplies company style rules and brand tone across the whole team
  • Pro (1 each)
  • Enterprise (unlimited)
Superhuman GoAI assistant
  • AI assistant that connects apps such as mail/docs/calendar to help with work
  • Bundled in the same plans as Grammarly
  • Free (limited)
  • Pro and above (full chat is at trial level)

Plans

PlanPrice (monthly billing / per month when billed yearly)What you can doUsage limitsFeatures
Free$0
  • Basic proofreading
  • Tone detection
  • AI prompts
  • Translation/rewriting
  • Go/Docs
  • 100 AI prompts per month
  • Limited translation/rewriting
  • Limited use of Go/Docs
No tone adjustment/sentence rewriting/AI detection
  • Pro (Grammarly Pro
  • Superhuman Pro)
  • $15
  • $12
  • per user (per the Superhuman official price table)
  • Tone adjustment
  • Sentence rewriting
  • Translation/rewriting
  • AI detection/plagiarism check
  • Style guide/brand tone
  • Team analytics
  • Docs/Go included
  • 2,000 AI prompts per user per month
  • Unlimited translation/rewriting
  • 1 style guide/brand tone
  • 7-day free trial
  • Plan shared by individuals and teams
Business (Superhuman)
  • $40
  • $33
  • per user
  • Grammarly features of Pro
  • Superhuman Mail
  • Team connectors
  • Custom agent extensions
  • Docs automation
Unlimited Docs attachmentsTeam bundle that adds an email client to Grammarly
EnterpriseNegotiated separately
  • SAML SSO
  • SCIM
  • Data loss prevention (DLP)
  • BYOK encryption
  • Audit log API
  • Unlimited AI prompts
  • Unlimited style guides/brand tones
  • Provided through Superhuman Go
  • Data is not used for training by default
APINo public productNo public API for individuals/developersNot applicableCannot be confirmed
  • The official Grammarly pricing page (grammarly.com/plans) shows Pro only as $12 with no billing period, while the Superhuman official price table shows Pro at $15 for monthly billing and $12 for yearly billing. Some third-party sources, however, list Grammarly Pro bought on its own at $30 for monthly billing and $20 per month for quarterly billing, so it may differ by purchase route. Be sure to check the final price at checkout.
  • No official won price could be confirmed. The old Premium/Business plans were merged into Pro.

Which plan to choose

  • Free: People who only want to catch typos and basic grammar mistakes in English emails/assignments. Just installing the browser extension is quite useful.
  • Pro: Office workers and international students who often write English reports/papers/resumes. Whole-sentence natural rewriting and AI detection/plagiarism checks are the core, and yearly billing is much cheaper.
  • Business: Sales/CS teams that handle English email in bulk with Superhuman Mail in addition to Grammarly.
  • Enterprise: Large companies that need security policies (SSO, DLP, no data training) and want to unify the tone of company-wide documents.
  • API: There is no public API, so if you want to add proofreading to your own service, you need to look at other proofreading APIs.

Notes

Good for

#AI#Artificial Intelligence#Generative AI#Writing#Productivity#Document Writing#Summarization#Free

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Prices converted at 1 USD = ₩1,329.49 (2026-10-19). Original price shown in brackets. Taxes as listed by each provider.

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