Grammarly

Grammarly — Cross-Surface AI Writing Assistant With Proofreader/Paraphraser Agents, Tone + Plagiarism/AI Detection (Active, Parent Renamed Superhuman Oct 2025)

Grammarly launched 2009; Oct 29 2025 parent company rebranded “Grammarly Inc.” → “Superhuman”​ (after acquiring Superhuman Mail + Coda, launching Superhuman Go), but the writing product keeps the name Grammarly, same login/plans/SLAs — per your Roam→Layla rule this is company-level rebrand, product not acquired-kept, not shutdown. Active 2026-08, 40M+ users, 50K+ orgs. Category ai-productivity-data; pipeline_stage none. Killer differentiator = real-time inline check across 1M+ surfaces (browser/Word/GDocs/Outlook/mobile keyboard/desktop) + 2026 AI agent stack (Proofreader/Paraphraser/Reader Reactions/Citation Finder/AI Grader/Fact Checker/Humanizer/AI Detector) + Authorship provenance + tone detection free + 100 AI prompts free / 2,000 Pro; not ProWritingAid (craft reports for long-form, weaker inline ubiquity), not QuillBot (paraphrase-first, no tone/plagiarism depth), not LanguageTool (30+ langs, English shallower), not Writer.com (enterprise brand-voice governance, no consumer grammar lead), not ChatGPT/Claude (open-gen, no inline passage correction). 2026 trap: Mar 2026 “Expert Review” agent impersonated real authors (Stephen King/bell hooks/Casey Newton) → disabled Mar 12, class action filed, trust hit remains, AI-detector failed Pangram RAID benchmark (0/9 caught), monthly $30 vs annual $12 is 2.5× gouge, rewrites existing text not originator of long drafts, English-only, cloud-egress (Enterprise/Biz/EDU can opt training off, individual free/pro train-on-default), Mar 2026 killed old Premium/Business naming → all folded to Pro (≤149 seats) then Enterprise.

1. One-line positioning

Grammarly = inline English writing co-pilot everywhere you type: keystroke → grammar/spelling/punctuation/clarity/conciseness/tone inline → Pro unlocks full-sentence rewrite, fluency, inclusive-language, citation consistency, plagiarism + AI-text detection, 2,000 AI prompts/mo → Docs editor + agent tray (Proofreader/Paraphraser/Reader Reactions/Citation Finder/Fact Checker/AI Grader/Humanizer) → Authorship panel logs writing provenance → Enterprise adds SAML/SCIM/DLP/BYOK/audit-logs/confidential-mode. Fits ai-productivity-data; pipeline_stage none (type→correct→rewrite→detect→export). For ESL writers, daily email/Slack/document drafters, students polishing essays, and teams wanting consistent tone without a styleguide workshop, it’s the lowest-friction default; for long-form novel drafting, multilingual, or brand-voice enforcement at scale, ProWritingAid/QuillBot/LanguageTool/Writer win.

2. Core features

3. Pricing (2026-08, USD)

pricing_type = freemium-per-seat-ai-prompt-metered; starting_price = $0; free_tier = "yes; real-time grammar/spell/punctuation/tone, 100 AI prompts/mo, Authorship, no rewrite-accept/no plagiarism/AI-detect/no style-guide"; pricing_note = "oct-29-2025-parent-grammarly-inc-renamed-superhuman-product-name-unchanged-not-shutdown; mar-2026-premium-and-business-folded-into-pro-149-seat-cap; pro-30-mo-or-144-yr-2.5x-monthly-gouge; quarterly-60-3mo-20-eff; student-unidays-20-25pct-off-pro-9-9.60; enterprise-custom-ssso-scim-dlp-byok; individual-pro-train-on-default-biz-ent-edd-opt-out-contract"

4. Access Type

access_type: browser-extension-plus-desktop-plus-office-plus-mobile-keyboard-plus-web-docs

access_display: 🌐 Chrome/Edge/Safari/Firefox ext · 🖥️ Win/Mac desktop · 📝 Word/Outlook add-in + GDocs · 📱 iOS/Android keyboard · 📝 Grammarly Docs web · no MCP, no public REST API for individuals (Enterprise audit-logs API only)

5. Reviews (2026)

Praise: invisible inline correction everywhere, tone detection free now (used to be Pro), 100 prompts/mo free covers casual users, Authorship provenance useful post-AI-detector era, Pro $12/yr cheap vs buying separate plagiarism+citation+paraphrase tools, Enterprise gov stack (BYOK/DLP/SCIM) beats rivals for regulated buyers.

Gripes: monthly $30 vs annual $12 = 2.5× gouge, AI detector unreliable (Pangram 0/9), Expert Review impersonation scandal Mar 2026 → class action, rewrites polish but won’t originate 2k-word drafts (Claude/ChatGPT better), English-only, style suggestions generic (can’t enforce house voice like Writer), false positives fight distinctive prose, individual plans train-on-default, no API for pipeline embedding, refund/auto-renew friction.

6. Best for / Not for

7. Competitors