CompareStack/DeepSeek vs Grammarly
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Updated March 2026 · Independent Analysis

DeepSeekvsGrammarly

DeepSeek is free; Grammarly starts at $12/mo. Grammarly is rated higher at 4.7/5 vs DeepSeek's 4.5/5.

D
DeepSeek

Open-source AI model from China rivaling GPT-4 at a fraction of the cost — shook the AI world in 2025.

★ 4.5/5Founded 202350M+ users
Try DeepSeek Free →
G
Grammarly

AI writing assistant for grammar, clarity, and tone — works across all your apps.

★ 4.7/5Founded 200930M+ users
Try Grammarly Free →

⚡ Quick Stats

⭐
Avg Rating
DeepSeek4.5/5
Grammarly4.7/5
🏆 Grammarly wins
💰
Starting Price
DeepSeekFree
Grammarly$12/mo
🏆 DeepSeek wins
🔧
Features
DeepSeek8
Grammarly8
🏆 DeepSeek wins
🎁
Free Plan
DeepSeekYes ✓
GrammarlyYes ✓

📊 Ratings Breakdown

D

DeepSeek

4.5/5 avg
G2 Score4.5/5
Capterra Score4.6/5
Overall Avg4.55/5
G

Grammarly

4.7/5 avg
G2 Score4.7/5
Capterra Score4.7/5
Overall Avg4.7/5

⚡ Quick Verdict

Independent analysis based on features, pricing, and user ratings

Choose DeepSeek if you need:
  • ✓ Open source
  • ✓ Chain-of-thought reasoning
  • ✓ Code generation
  • ✓ Math solving
  • ✓ Multimodal
Try DeepSeek Free →
Choose Grammarly if you need:
  • ✓ Grammar checking
  • ✓ Plagiarism detection
  • ✓ Tone suggestions
  • ✓ Style improvements
  • ✓ Browser extension
Try Grammarly Free →

🔧 Feature Comparison

DeepSeek uniquely offers Open source, Chain-of-thought reasoning, Code generation. Grammarly uniquely offers Grammar checking, Plagiarism detection, Tone suggestions. Both share 0 features.

Feature
DeepSeek
Grammarly
Open source
✓
✗
Chain-of-thought reasoning
✓
✗
Code generation
✓
✗
Math solving
✓
✗
Multimodal
✓
✗
API access
✓
✗
Local deployment
✓
✗
Cost-efficient
✓
✗
Grammar checking
✗
✓
Plagiarism detection
✗
✓
Tone suggestions
✗
✓
Style improvements
✗
✓
Browser extension
✗
✓
MS Office plugin
✗
✓
Mobile app
✗
✓
Team style guide
✗
✓
Total Features
8
8

💰 Pricing Comparison

DeepSeek is free; Grammarly starts at $12/mo.

D

DeepSeek Plans

Free tier available

Free
Free
API
Custom
Full DeepSeek pricing breakdown →
G

Grammarly Plans

Free tier available

Free
Free
  • • Basic grammar
  • • Spelling
  • • Punctuation
PremiumBest Value
$12/month
  • • Style suggestions
  • • Tone detection
  • • Plagiarism checker
  • • Full rewrites
Business
$15/month
  • • Team features
  • • Style guide
  • • Analytics
  • • Priority support
Full Grammarly pricing breakdown →
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❓ Frequently Asked Questions

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