Is Grammarly or Perplexity better?

Neither clearly leads. Grammarly starts at Free and Perplexity at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Grammarly or Perplexity?

Grammarly starts at Free and Perplexity at Free.

Does Grammarly or Perplexity run on more platforms?

Grammarly runs on Web, macOS, Windows, iOS, Android. Perplexity runs on Web, iOS, Android, Comet (AI browser).

Can I use Grammarly for free?

Both have a free tier, so you can try either at no cost before committing.

What is Grammarly best used for?

Grammarly is most often used for email writing, document editing, academic writing, business communication. Of those, email writing and document editing are not what Perplexity is typically brought in for.

What can Grammarly do that Perplexity cannot?

Grammarly covers Grammar checking, Spelling correction, Punctuation, Clarity suggestions. Perplexity covers Real-time web search, Source citations, Follow-up questions, File analysis.

All industries · head to head

Grammarly vs Perplexity

Grammarly

All industries

Great writing, simplified

From: Free
Rated: -

Full review Website

Perplexity

AI Tools

AI-powered answer engine with citations

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Grammarly occasional false positives and grammatically incorrect suggestions that can introduce errors; Perplexity context window has been stealthily reduced despite prior claims of 1-million-token capacity
They diverge on capability: Grammarly covers Grammar checking, Perplexity covers Real-time web search.

Where they differ

Only the attributes on which Grammarly and Perplexity actually diverge.

Attributes where Grammarly and Perplexity differ
Attribute	Grammarly	Perplexity
Platforms	Web, macOS, Windows, iOS, Android	Web, iOS, Android, Comet (AI browser)
Category	All industries	AI Tools
Founded	2009	2022

Identical on both: starting price (Free), pricing model (Unknown), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Grammarly

Grammar checking
Spelling correction
Punctuation
Clarity suggestions
Engagement feedback
Delivery insights
Plagiarism checker
Citation generator

Only in Perplexity

Real-time web search
Source citations
Follow-up questions
File analysis
Browser extension
API access
Mobile apps
Web support

What people use each for

The jobs each tool is most often brought in to do.

Grammarly

Email writingnot Perplexity
Document editingnot Perplexity
Academic writingnot Perplexity
Business communicationnot Perplexity
Content creationnot Perplexity

Perplexity

ai tools managementnot Grammarly
Workflow automationnot Grammarly
Reportingnot Grammarly

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Grammarly

Occasional false positives and grammatically incorrect suggestions that can introduce errors
Privacy concerns about sending text to Grammarly's servers for analysis
AI capabilities sometimes produce hallucinations and fabricated citations that appear grammatically correct

Perplexity

Context window has been stealthily reduced despite prior claims of 1-million-token capacity
Citations sometimes point to irrelevant or overly general articles that do not support the stated claims
Weak performance on complex multi-step reasoning and deep logic compared to dedicated reasoning LLMs
Web crawler ignores robots.txt directives and scrapes content from sites that explicitly opted out
Pro subscription quotas and feature access quietly reduced without user notification

Pricing, plan by plan

Grammarly

Free

FreeFree
- Basic grammar and spelling checks
- Tone visibility
- 100 AI prompts per month
Pro$12/month
- Sentence rewrites
- Tone adjustment
- Plagiarism and AI detection

Perplexity

Free

FreeFree
- Unlimited basic searches
- 3 Pro Searches per day
- 1 Research query per month
Pro$20/month
- Unlimited Pro Searches
- Advanced AI models
- All free features
Pro Annual$200/year
- Unlimited Pro Searches
- Advanced AI models
- All free features
Max$200/month
- Unlimited Pro Searches
- Labs multi-agent orchestration
- Perplexity Computer with 19 AI sub-agents

Which should you pick?

Choose Grammarly if

You need grammar checking.
You want to start without paying.
You work on Web, macOS, Windows, iOS, Android.
You also want spelling correction.

Grammarly review

Choose Perplexity if

You need real-time web search.
You want to start without paying.
You work on Web, iOS, Android, Comet (AI browser).
You also want source citations.

Perplexity review

Questions people ask

Is Grammarly or Perplexity better?: Neither clearly leads. Grammarly starts at Free and Perplexity at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Grammarly or Perplexity?: Grammarly starts at Free and Perplexity at Free.
Does Grammarly or Perplexity run on more platforms?: Grammarly runs on Web, macOS, Windows, iOS, Android. Perplexity runs on Web, iOS, Android, Comet (AI browser).
Can I use Grammarly for free?: Both have a free tier, so you can try either at no cost before committing.
What is Grammarly best used for?: Grammarly is most often used for email writing, document editing, academic writing, business communication. Of those, email writing and document editing are not what Perplexity is typically brought in for.
What can Grammarly do that Perplexity cannot?: Grammarly covers Grammar checking, Spelling correction, Punctuation, Clarity suggestions. Perplexity covers Real-time web search, Source citations, Follow-up questions, File analysis.

Answered from the vendors’ own pages

Grammarly: Does Grammarly have a free version?

Yes, Grammarly offers a free tier with basic spelling, grammar, and punctuation checks, tone visibility, and 100 AI prompts per month. The Pro plan ($12/month annual) adds sentence rewriting, plagiarism detection, and 2,000 AI prompts.

Source

Perplexity: Is Perplexity completely free?

Perplexity has a free tier with unlimited basic searches and 3 Pro Searches per day. Pro ($20/month or $200/year) and Max ($200/month) tiers unlock more advanced features like multi-model access and unrestricted queries.

Source

Grammarly: What platforms does Grammarly work with?

Grammarly works across 1 million+ apps including Google Docs, Microsoft Word, Outlook, Slack, Gmail, and web browsers. It also integrates with productivity tools like Asana, Jira, Monday.com, Confluence, and HubSpot.

Source

Perplexity: What is the difference between Pro and Max?

Pro provides access to advanced AI models like GPT-5.2, Claude Sonnet 4.5, and Gemini 3 Pro. Max adds Labs for multi-agent orchestration, Perplexity Computer with 19 specialized AI sub-agents, and 10,000 Computer credits per month.

Source

Grammarly: Can I use Grammarly offline?

Grammarly requires an internet connection to function, though the browser extension works with some offline text areas. For offline use, the desktop app and browser extensions sync when reconnected.

Source

Perplexity: Can I use Perplexity offline?

No. Perplexity requires an active internet connection for all searches. The full answer service is not available offline.

Source

Grammarly: What is included in the Enterprise plan?

The Enterprise plan includes unlimited team members, dedicated support, custom roles and permissions, data loss prevention, bring-your-own-key encryption, and unlimited AI prompts. Pricing is custom and available by contacting sales.

Source

Perplexity: What platforms does Perplexity support?

Perplexity is available as a web application, iOS app, Android app, and as Comet, a dedicated AI browser for mobile (Android available, iOS in development).

Source

Perplexity: How reliable are Perplexity's citations?

Citations are a key feature of Perplexity, but users report that citations sometimes point to irrelevant or overly general articles that don't directly support the claims made.

Source

Perplexity: Does Perplexity's context window match the advertised 1 million tokens?

Perplexity had promoted a 1-million-token context window, but users have reported stealth reductions in the actual context capacity without public announcement.

Source

Grammarly vs Perplexity

Grammarly

Perplexity

The short version

Where they differ

What each one covers

Only in Grammarly

Only in Perplexity

What people use each for

Grammarly

Perplexity

Where each one falls short

Grammarly

Perplexity

Pricing, plan by plan

Grammarly

Perplexity

Which should you pick?

Choose Grammarly if

Choose Perplexity if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Grammarly

More on Perplexity

Keep looking

Other head to heads