H
HReadability editor that flags wordy, unclear writing and offers AI fixes
From $8.33/mo
Grammarly vs Superhuman
Pricing, features, platforms and who each one suits — side by side.
G
Choose Grammarly if…
- you work on Windows, macOS, iOS
- you're in its core audience: students, professionals
S
Choose Superhuman if…
- you're in its core audience: professionals with heavy email volume, sales teams
Side by side
Feature Grammarly Superhuman
Pricing modelFreemiumFreemium
Starting price—$12/mo
Free plan
Free trial
API
Open source
Trains AI on your contentYes, unless you opt outYes, unless you opt out
Data retentionSaved documents kept until you delete them or your accountKept as long as necessary; periods vary by data and settings
Security and complianceSOC 2 Type II—
AI rewrites—
Plagiarism checker—
AI text detection—
Non-English checking—
Word/Google Docs add-in—
Browser extension—
Custom style guide—
PlatformsWeb, Windows, macOS, iOS, Android, ChromeWeb
CategoryGrammar & ProofreadingEmail
CompanySuperhuman Platform Inc.Superhuman Platform Inc.
Based inUnited StatesUnited States
Founded20092009
Part ofSuperhuman—
Key features
G Grammarly
- Real-time spelling, grammar and clarity checks
- Paragraph and full-sentence rewrites
- Tone suggestions for different audiences
- Reader Reactions predicts how readers respond
- AI Detector and Humanizer agents
- Plagiarism checker and citation generator
- Works in MS Office, Google Docs and browsers
- Enterprise style guides, brand tones and DLP
S Superhuman
- AI-drafted email replies in your own voice
- Split inbox, auto labels and auto archiving
- Shareable availability links and calendar scheduling
- Inline writing suggestions in 20+ languages
- Daily Briefs summarizing deadlines and meetings
- Collaborative docs with tables, Kanban boards and forms
- Store of 100+ prebuilt AI agents
- CRM views from HubSpot, Salesforce and Pipedrive
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Grammarly
Free€0
Pro€12/member/mo billed annually (€30 billed monthly)
EnterpriseCustom
Superhuman
FreeFree
Pro$12/member/mo billed yearly ($15 billed monthly)
Business$33/member/mo billed yearly ($40 billed monthly)
EnterpriseCustom
Strengths and limitations
Grammarly
- Free plan includes grammar checks and 100 AI prompts a month
- Available on desktop, mobile, browser extensions, MS Office and Google Docs
- Pro includes plagiarism and AI-text detection
- Enterprise offers SSO, SCIM, BYOK and data loss prevention
- Pro costs €30 when billed monthly versus €12 billed annually
- Free plan is limited to 100 AI prompts per month
- Enterprise pricing is not published
Superhuman
- Free plan includes AI chat, writing help and collaborative docs
- Bundles email, Grammarly writing tools and docs in one suite
- Business plan connects HubSpot, Salesforce and Pipedrive
- Enterprise offers SAML SSO, DLP and BYOK encryption
- Superhuman Mail is only included from the Business plan
- No free trial of paid plans listed on the plans page
- CRM views in the inbox are read-only
More comparisons
Other options to consider
HH
From $8.33/mo
H
Readability editor that flags wordy, unclear writing and offers AI fixes
Grammar & Proofreading
L
LL
Freemium
L
Grammar, spelling and style checker for 30+ languages, with AI rephrasing
Grammar & ProofreadingFree planAPIOpen source
P
PP
Freemium
P
Grammar checking, line editing and story critique for fiction writers
Grammar & ProofreadingFree plan
G
GG
Freemium
G
AI grammar, spelling and rephrasing help for English writers on any device
Grammar & ProofreadingFree planAPI
G
GG
Freemium
G
AI text detector with plagiarism checks and writing replay for educators
AI Detection & HumanizersFree planAPI
O
OAI content detection, plagiarism and fact checking for publishers and educators
Free, from $12.95/mo
O
Free, from $12.95/mo
O
AI content detection, plagiarism and fact checking for publishers and educators
AI Detection & HumanizersFree planAPI
Built from each vendor's public website; we haven't tested them hands-on. Editorial policy