
Grammarly

Side-by-side comparison based on pricing, features, and community data.
Grammarly and MarketMuse are both AI writing tools. Grammarly is Freemium; MarketMuse is Freemium. Grammarly and MarketMuse serve completely different buyers.
Grammarly and MarketMuse serve completely different buyers. Grammarly is for anyone writing anything—it's a lightweight, ubiquitous writing quality tool that catches grammar, tone, and plagiarism across 500+ apps. MarketMuse is for SEO and content teams at scale who need to plan topic-cluster strategies and audit entire content inventories. Pick Grammarly if you write emails, docs, or social posts and want real-time corrections everywhere. Pick MarketMuse if you manage a website's content strategy and need data-driven briefs, competitive gaps, and topical authority scoring. Price-wise: Grammarly is $12/mo for individuals; MarketMuse starts $149/mo and requires $399/mo to unlock full value. They don't compete—they complement different workflows.
Pick Grammarly if you write frequently across email, documents, and web platforms and want real-time grammar, tone, and plagiarism feedback integrated into your daily tools.
Pick MarketMuse if you manage SEO content strategy at scale and need AI-driven topic modeling, competitive gap analysis, and site-wide content audits to build topical authority.
| Feature | Grammarly | MarketMuse |
|---|---|---|
| Primary use case | Writing quality (grammar, tone, clarity) | Content strategy and SEO planning |
| Real-time integration | ✓ 500+ web apps via extension | Web-based dashboard + API only |
| Plagiarism detection | ✓ Premium tier | — |
| Content briefs and topic research | — | ✓ AI-powered with subtopics |
| Site-wide content audit | — | ✓ Inventory and gap analysis |
| Entry price | Free tier + $12/mo | Free tier + $149/mo |
| Mobile support | ✓ iOS/Android keyboard | Web only |
| Learning curve | Minimal | Steep (topical authority model) |
Synthesized by AI from verified tool data · cached per pair


Basic grammar and spell checking
All features including plagiarism detection, tone detection, advanced suggestions
Team collaboration, brand style guides, team analytics
~10 queries per month, limited features
100 queries/month, content briefs, optimization
Unlimited queries, full suite, multiple users
Custom, enterprise features, dedicated support