Grammarly vs Writesonic
- ✦ Grammar checking
- ✦ Plagiarism detection
- ✦ Tone suggestions
- ✦ AI article writer
- ✦ SEO optimizer
- ✦ Chatsonic
Grammarly and Writesonic are both AI Writing Tools tools. Grammarly starts at $30/mo, Writesonic at $49/mo. Compare features, pricing, and ratings below to find the best fit for your team.
When to Choose Grammarly vs Writesonic
The question that matters: “In what situation will I regret choosing A over B after 3 months?”
Tone suggestions catch aggressive or casual phrasing in the Browser extension, keeping outbound emails on-voice without review cycles that eat 4+ hours daily.
Email writer generates subject lines, body copy, and CTAs with A/B variants built in. automation platform exports segmented lists directly to Klaviyo or CRM for immediate deployment.
Plagiarism detection scans 16+ billion sources in under 3 seconds per document, catching unattributed language before it reaches external stakeholders.
Style improvements catch passive voice and unclear modifiers in spec documents, cutting engineering scope clarification requests by 35% and compressing feedback loops.
The Team style guide pushes real-time corrections into Google Docs, team chat, and email clients - cutting first-pass copy editing for 60-70% of contributor submissions.
Feed product data into the Product description feature. The SEO optimizer targets high-intent keywords per category; bulk output exports via API to Shopify or WooCommerce.
Ad copy generator produces Google Ads and Facebook variations with character-compliant CTAs built in. No manual formatting rework across platform specs.
Configure the AI article writer with tone guidelines. Chatsonic refines sections mid-generation interactively - one marketer ships 100+ articles yearly instead of 20.
Pricing Comparison & PlansHigh· Verified May 30, 2026
Grammarly Plans
Free tier available
Free
FreeBest for: Ideal for individuals needing basic grammar and spelling checks to improve their writing.
- ✓Basic grammar and spelling checks
- ✓Limited tone suggestions
- ✓Basic clarity feedback
- ✓100 AI prompts per month
Pro
$30/user/moBest for: individual users seeking advanced writing feedback, style suggestions, and plagiarism detection.
- ✓Advanced grammar and style suggestions
- ✓Tone detection
- ✓Plagiarism detection
- ✓Word choice recommendations
- ✓Formatting assistance
Business
$15/user/moBest for: Suitable for small to medium teams requiring centralized billing, admin controls, and team-specific style guides.
- ✓Centralized billing
- ✓Admin controls
- ✓Team analytics
- ✓Style guides
- ✓Brand tone profiles
Enterprise
Contact SalesBest for: Designed for large organizations needing advanced security, dedicated support, and custom integrations.
- ✓Customized pricing
- ✓Volume discounts
- ✓Negotiated pricing
Writesonic Plans
Free tier available
Free
FreeBest for: Ideal for individuals exploring AI writing capabilities without commitment
- ✓Limited access to Writesonic's tools
- ✓Access to GPT-4o mini and Claude Haiku models
- ✓70+ content templates
- ✓Test the interface and output quality
Lite
$49/moBest for: A good entry point for small businesses or freelancers needing regular AI content generation
- ✓70+ AI templates
- ✓Support for 25+ languages
- ✓Landing page generator
- ✓Integrations with SEMrush and Zapier
- ✓Plagiarism checker
Starter
$99/moBest for: Suitable for growing teams or content creators requiring more advanced features and higher usage limits
- ✓AI search visibility tracking
- ✓1 writing style
- ✓Standard email support
- ✓Agentic Workflows (trial basis)
- ✓GEO tracking for ChatGPT
Basic
$249/moBest for: Designed for larger content teams or agencies with substantial content demands
- ✓AI search visibility tracking across multiple platforms
- ✓5 writing styles
- ✓Standard email support
- ✓Expanded Agentic Workflows
- ✓Brand Presence Tracking
Growth
$499/moBest for: large enterprises or high-volume content operations needing maximum AI writing power
- ✓Advanced AI search visibility tracking
- ✓10 writing styles
- ✓Priority email support
- ✓Sentiment Analysis
- ✓Prompt Diversification
Enterprise
Contact SalesBest for: Tailored for organizations with unique requirements, custom integrations, and dedicated support
- ✓Custom AI model development
- ✓Personalized onboarding
- ✓Priority support
- ✓Dedicated account manager + strategist
- ✓White-glove onboarding
Capability Breakdown
6 differences found across 20 standardized features
- •Grammar checking
- •Plagiarism detection
- •Tone suggestions
- •Style improvements
- •Browser extension
- •MS Office plugin
- •Mobile app
- •Team style guide
- •AI article writer
- •SEO optimizer
- •Chatsonic
- •AI image generation
- •Landing page builder
- •Ad copy generator
- •Product description
- •Email writer
- •Paraphrasing tool
- •Summarizer
- •Browser extension
- •Shopify integration
Strengths & Limitations
Evaluative strengths and weaknesses: not feature lists
- +Integrates seamlessly across browsers, desktop apps, and mobile
- +Real-time tone detection adjusts writing for specific audiences
- +Comprehensive free version covers core grammar and spelling needs
- +Style guide feature ensures brand consistency for business teams
- +Plagiarism checker compares text against billions of web pages
- −Suggestions can be overly prescriptive, stifling creative or nuanced writing styles
- −Advanced features (plagiarism, style guides) are locked behind a pricey Pro plan
- −Can occasionally misinterpret context, offering grammatically correct but nonsensical changes
- −Offline functionality is limited; requires an internet connection for full analysis
- −Generative AI features lag behind dedicated tools like Jasper or Copy.ai
- +Chatsonic: AI chat with real-time Google data & image generation
- +Audiosonic: AI-powered text-to-speech audio file creation
- +Photosonic: Unique AI art and stock photo generator
- +Brand Voice: Trains the AI on your specific brand style and tone
- +Offers both GPT-3.5 and advanced GPT-4 models
- −Fact-checking is still required, especially for niche or technical topics
- −Free plan has very limited word credits and feature access
- −UI can feel cluttered with its extensive number of templates
- −Long-form content can sometimes lack narrative flow and require heavy editing
- −Credit system can be confusing to track across different tools and quality levels
At a Glance
Recent Price History
Grammarly removed the "Premium" plan
Plan removed · May 30, 2026
Grammarly updated "Business" from $15/mo to Custom
Price change · May 30, 2026
Grammarly added a new "Pro" plan at $30/user/mo
Plan added · May 30, 2026
Writesonic added a new "Starter" plan at $99/mo
Plan added · May 28, 2026
Writesonic added a new "Lite" plan at $49/mo
Plan added · May 28, 2026
Writesonic removed the "Professional" plan
Plan removed · May 28, 2026
Writesonic added a new "Basic" plan at $249/mo
Plan added · May 28, 2026
Writesonic removed the "Chatsonic" plan
Plan removed · May 28, 2026
Grammarly removed the "Pro" plan
Plan removed · May 21, 2026
Grammarly added a new "Business" plan at $15/mo
Plan added · May 21, 2026
Frequently Asked Questions
Related Comparisons
Sources & Data Trail · Grammarly
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-05-30)
- 2.Official Website·Official vendor website
- 3.G2·G2 verified reviews · 4.7/5 · 13,700 reviews
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Sources & Data Trail · Writesonic
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-05-28)
- 2.Official Website·Official vendor website
- 3.G2·G2 verified reviews · 4.7/5 · 2,232 reviews
- 4.Capterra·Capterra verified reviews · 4.7/5
- 5.TrustRadius·TrustRadius verified reviews
- 6.PeerSpot·PeerSpot enterprise peer reviews