Grammarly
Free AI Writing Assistance
VS
Perplexity AI
AI-powered answer engine for real-time, cited information and advanced research.
Detailed comparison
Criteria
Grammarly
Perplexity AI
Pricing
Freemium
Freemium
Plans & pricing
Free: Free, Enterprise: Custom
Free Plan: Free, Perplexity Pro: $16.67/mo, Education Pro: $10/mo, Perplexity Max: $166.67/mo, Perplexity Enterprise Pro: $33.33/mo, Perplexity Enterprise Max: $270.83/mo, API Pricing: Custom
Free trial
No
No
Audience
b2c
b2c
Platforms
Web, Ios, Android, Desktop
Web
API
No
No
Open Source
Proprietary
Proprietary
Categories
Security, information technology & services, Grammar checking
Specialized Technologies, information technology & services, Search engine
Popularity
Very High
Very High
Description
Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website. It helps individuals and ...
Perplexity AI is a research-oriented answer engine that integrates large language models with live web search, transparent citations, document analysi...
Pricing
Grammarly
Freemium
Perplexity AI
Freemium
Plans & pricing
Grammarly
Free: Free, Enterprise: Custom
Perplexity AI
Free Plan: Free, Perplexity Pro: $16.67/mo, Education Pro: $10/mo, Perplexity Max: $166.67/mo, Perplexity Enterprise Pro: $33.33/mo, Perplexity Enterprise Max: $270.83/mo, API Pricing: Custom
Free trial
Grammarly
No
Perplexity AI
No
Audience
Grammarly
b2c
Perplexity AI
b2c
Platforms
Grammarly
Web, Ios, Android, Desktop
Perplexity AI
Web
API
Grammarly
No
Perplexity AI
No
Open Source
Grammarly
Proprietary
Perplexity AI
Proprietary
Categories
Grammarly
Security, information technology & services, Grammar checking
Perplexity AI
Specialized Technologies, information technology & services, Search engine
Popularity
Grammarly
Very High
Perplexity AI
Very High
Description
Grammarly
Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website. It helps individuals and ...
Perplexity AI
Perplexity AI is a research-oriented answer engine that integrates large language models with live web search, transparent citations, document analysi...
Features
Grammarly
Personalized AI guidance
AI text generation
Tone detection
Mistake-free writing support
Cross-platform availability
Trust & security
Perplexity AI
Real-time answers with cited sources
Perplexity Computer for autonomous, multi-model AI workflows
Access to advanced AI models (GPT-5.1, Claude Opus 4.5, o3-pro, etc.)
File upload and analysis (PDFs, spreadsheets, reports)
Comet AI-native browser for integrated web assistance
Focus Modes for targeted searches (Web, Academic, Social, Health, Finance)
Key differentiators
Grammarly
- Personalized AI writing guidance
- Cross-platform AI assistant
- Advanced mistake-free writing
Perplexity AI
- Real-time answers with cited sources
- Agentic AI workflows (Perplexity Computer)
- Document analysis & specialized focus modes
Other comparisons
FAQ: Grammarly vs Perplexity AI
Grammarly: Free AI Writing Assistance. Perplexity AI: AI-powered answer engine for real-time, cited information and advanced research.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. Grammarly is freemium and Perplexity AI is freemium.
The best choice between Grammarly and Perplexity AI depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Both are primarily designed for individuals. The choice depends on which specific features you need.
Grammarly offers: Personalized AI guidance, AI text generation, Tone detection, Mistake-free writing support. Perplexity AI offers: Real-time answers with cited sources, Perplexity Computer for autonomous, multi-model AI workflows, Access to advanced AI models (GPT-5.1, Claude Opus 4.5, o3-pro, etc.), File upload and analysis (PDFs, spreadsheets, reports).
Based on our data, Perplexity AI currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.