Grammarly
AI writing assistant that checks grammar, tone, and style, and generates AI text across browsers, docs, email, and enterprise apps.
Last verified:
Grammarly, founded in 2009 by Max Lytvyn, Alex Shevchenko, and Dmytro Lider, is a widely used AI writing assistant offering spelling/grammar correction, tone detection, full-sentence rewriting, and generative AI prompts via browser extensions, a desktop app, and integrations across 1M+ apps and sites. In 2025 the company acquired Coda and Superhuman Mail and rebranded its parent organization as Superhuman, positioning Grammarly as one product within a broader AI-native productivity platform. Enterprise customers get SAML SSO, SCIM, BYOK encryption, custom style guides, and a developer REST API (Analytics, License Management, Writing Score, AI/plagiarism detection) authenticated via OAuth 2.0.
Pricing
| Tier | Price | Key features |
|---|---|---|
| Free | $0/monthly | Spelling/grammar/punctuation checks, Tone detection, 100 AI prompts per month, Browser extension & desktop app |
| Pro | $12/annual | Full-sentence rewrites, Tone adjustment, Plagiarism & AI detection, 2,000 AI prompts/month, For individuals or teams of 2-149 members |
| Enterprise | Custom | Proactive AI assistant/agents (via Superhuman Go), BYOK encryption, SAML SSO, SCIM, Custom roles & permissions, Data loss prevention, Audit logs API, Unlimited style guides/brand tones, ROI reporting |
Source: https://www.grammarly.com/plans
Agent-readiness
- Discoverability
- 70/100
- Machine-readable content
- 60/100
- Programmatic access
- 55/100
- MCP / agent support
- 10/100
- Self-serve transactability
- 65/100
- Transparency
- 60/100
Security & compliance
- SSO / SAML
- Yes
- Encryption at rest
- Yes
- Encryption in transit
- Yes
- Audit log
- Yes
- Pentest report
- Not publicly documented
"Not publicly documented" means Crail found no public evidence either way — not a confirmed absence. See our methodology. Trust center: https://www.grammarly.com/trust.
FAQ
Does Grammarly have a free tier?
Yes, Grammarly offers a free tier or free trial.
Can you buy Grammarly without talking to sales?
Yes, Grammarly can be purchased self-serve without a sales call.
Does Grammarly have an official MCP (Model Context Protocol) server?
Not as of 2026-07-27 — no official MCP server was found.
What compliance certifications does Grammarly hold?
Grammarly holds: SOC 2 Type II, SOC 3, ISO/IEC 27001:2022, ISO/IEC 27018:2019, ISO/IEC 27017:2015, ISO/IEC 27701:2019, ISO/IEC 42001:2023, PCI DSS.
Reviews
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Methodology & disclosure
Data verified via agent crawled, last checked 2026-07-27. Agent-readiness methodology version crail-ar-v0.1. No vendor payment influences these scores — see our methodology page.