Grammarly vs Writesonic: Grammar Tool vs AI Writer (2026)

Overview

Grammarly and Writesonic serve fundamentally different purposes. Grammarly is a writing assistant that checks grammar, clarity, and tone — it makes your writing better. Writesonic is an AI content generator that creates content from scratch — it writes for you. Understanding this distinction is key to choosing the right tool.

Feature Comparison

Core Writing Capabilities

Grammarly polishes your writing:

• Grammar, spelling, and punctuation checking
• Clarity and conciseness suggestions
• Tone detection and adjustment
• Plagiarism detection
• Full-sentence rewrites
• Brand tone profiles (Business)
• Works everywhere (browser extension, desktop, mobile)

Writesonic generates content:

• AI article writer (full blog posts)
• Marketing copy templates (50+)
• AI chatbot (Chatsonic with web access)
• Paraphrasing and rewriting
• SEO content optimization
• Bulk content generation
• API access for automation

Winner: Different tools for different jobs. Grammarly for editing, Writesonic for generation.

Integration & Availability

Grammarly is everywhere:

• Browser extensions (Chrome, Firefox, Safari, Edge)
• Desktop apps (Mac, Windows)
• Mobile keyboard (iOS, Android)
• Microsoft Office integration
• Google Docs native support
• Slack, Notion, and 500+ apps
• Works passively in the background

Writesonic is web-focused:

• Web application
• Chrome extension (Chatsonic)
• API for custom integrations
• WordPress plugin
• Zapier integration

Winner: Grammarly for ubiquitous availability across all platforms.

Pricing

Grammarly Pricing (2026):

• Free: Basic grammar and spelling
• Premium: $30/month (advanced suggestions)
• Business: $25/user/month (team features)

Writesonic Pricing (2026):

• Free trial: 10,000 words
• Pro: $20/month (unlimited words, GPT-4o)
• Enterprise: Custom pricing

Winner: Writesonic is more affordable for content generation. Grammarly's free tier is excellent for basic editing.

Use Case Recommendations

Choose Grammarly if you: write your own content and want it polished — emails, reports, essays, social posts. Perfect for non-native English speakers.

Choose Writesonic if you: need AI to generate content from scratch — blog posts, ad copy, product descriptions, marketing content at scale.

Use both if you: generate content with Writesonic, then polish it with Grammarly for the best results.

FAQ

Can Grammarly generate content like Writesonic?

Grammarly has added GrammarlyGO, an AI assistant that can generate short-form content. However, it's not designed for long-form content generation like Writesonic.

Is Writesonic good for grammar checking?

Writesonic generates generally grammatically correct content, but it doesn't offer dedicated grammar-checking features. For polishing any text, Grammarly is superior.

Which is better for students?

Grammarly is better for students who write their own papers and need editing help. Writesonic could help with brainstorming and outlines, but using it to generate academic papers raises ethical concerns.

Can I use them together?

Absolutely — this is the recommended approach. Use Writesonic to generate first drafts, then run them through Grammarly for polish. The combination produces better content than either alone.

Which saves more time?

Writesonic saves more time on content creation (generates from scratch). Grammarly saves time on editing (catches errors you'd miss). For content marketers producing high volumes, Writesonic has the bigger time-saving impact.

Final Verdict

These tools complement rather than compete. Grammarly is essential for anyone who writes in English and wants error-free, clear communication. Writesonic is ideal for marketers and content creators who need to generate content at scale. For maximum impact, use Writesonic + Grammarly together.