Grammarly
Real-time writing assistant for grammar, tone, and clarity, wherever you type
Grammarly is the most established AI writing assistant, working everywhere you type - email, Google Docs, Slack, social media, and more. Beyond grammar and spelling, Grammarly analyses tone, suggests clarity improvements, checks for plagiarism (Pro), and helps adjust writing for different audiences. The tool's "goal setting" feature lets you specify intent, audience, and formality, tailoring suggestions accordingly. For business users, Grammarly can maintain brand voice consistency across teams. Its owner, Superhuman, says its products are used by over 40 million people and 50,000 organisations (company figures, October 2025), and it has become the default writing quality tool for professionals who want real-time feedback without disrupting workflow.
For comms teams: professionals wanting writing quality assurance across all platforms.
Best for
- • Professionals wanting writing quality assurance across all platforms
- • Teams needing brand voice consistency
- • Non-native English speakers
Pricing
Free; Pro $30/member/month billed monthly, $60/member/quarter, or $144/member/year (an average of $12/member/month); Enterprise on application.
Verified October 2026. The quarterly price is listed on Grammarly's support page but not on its plans page. Premium and Business no longer exist as separate tiers, both were consolidated into a single Pro plan (up to 149 seats). Grammarly is now part of Superhuman, alongside Superhuman Go, Coda and Superhuman Mail. GBP pricing exists but is only revealed at checkout.
Pricing last verified Oct 2026 – check vendor site for current rates.
What works well
- + Works everywhere
- + Real-time suggestions
- + Plagiarism checking
- + Brand tone and style guide controls (one of each on Pro)
Watch out for
- - Pro required for the features most professionals actually want
- - Can be overly prescriptive, particularly on tone
- - Specialised industry terms may confuse it
- - Now part of Superhuman, so the roadmap is tied to a wider suite rather than the writing tool alone
When to choose this
Choose Grammarly when writing quality, consistency, and tone checking across all team communications matter. It integrates across browsers and apps better than any alternative.
Who should look elsewhere
Grammarly is first a writing quality layer. It now drafts and brainstorms too (100 AI prompts a month on Free, 2,000 per member on Pro), but if drafting from scratch or strategic communications is the main job, most teams will still want Claude or ChatGPT alongside it. It's also less valuable for communicators whose primary output is highly technical, legal, or highly stylised writing where its suggestions may clash with specialist conventions. Teams working mainly in other languages get less: grammar and spelling suggestions cover 24 languages beyond English on every plan, but paragraph rewrites cover six (Spanish, French, Italian, German, Portuguese and Ukrainian).
Key features
- • Real-time grammar and spelling correction across apps
- • Tone detection and adjustment
- • Clarity and conciseness suggestions
- • Plagiarism detection (Pro)
- • Style guides and brand tones (one of each on Pro, unlimited on Enterprise)
- • Generative AI drafting and rewriting (100 prompts a month on Free, 2,000 per member on Pro)
- • Goal-based writing suggestions
Governance & data
Governance information is based on publicly available vendor documentation. Verify with your vendor before procurement decisions.
Integrations
Available on
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