FinderAtlas
Sign in

ChatGPT vs Grammarly

Features, pricing, ratings, and pros and cons, side by side.

ChatGPT logo

ChatGPT

OpenAI's AI assistant for writing, research, coding, image generation and voice chat

4.0(1 review)Freemium
Visit websiteView details
Grammarly logo

Grammarly

AI writing assistant that corrects, rewrites and tone-checks your text across every app

Freemium
Visit websiteView details

Verdict

ChatGPT and Grammarly are both AI Assistants tools. ChatGPT scores higher in FinderAtlas's editorial review (8.9 vs 8.2 out of 10). Both have a free plan or trial. Only Grammarly is available on Chrome Extension and Firefox Extension and offers an API.

Best overall

ChatGPT

  • Students
  • Writers
  • Software Developers
  • Researchers

Choose ChatGPT if

  • You want a tool built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant.
  • One assistant covers text, voice, images, file analysis, search and coding.
  • Free tier lets users try the service without a card.

Choose Grammarly if

  • You want a tool built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team.
  • Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
  • Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.
Best for beginners
ChatGPT
Best for business
ChatGPT

Features

17 features compared.

  • Chat with web search
    ChatGPT
    Available
    Grammarly
    Not available
  • Voice mode
    ChatGPT
    Available
    Grammarly
    Not available
  • Image generation
    ChatGPT
    Available
    Grammarly
    Not available
  • File and image analysis
    ChatGPT
    Available
    Grammarly
    Not available
  • Projects
    ChatGPT
    Available
    Grammarly
    Not available
  • ChatGPT agent
    ChatGPT
    Available
    Grammarly
    Not available
  • Codex
    ChatGPT
    Available
    Grammarly
    Not available
  • Connectors and apps
    ChatGPT
    Available
    Grammarly
    Not available
  • Citation Tools
    ChatGPT
    Not available
    Grammarly
    Available
  • Style Guides and Brand Tones
    ChatGPT
    Not available
    Grammarly
    Available
  • Cross-App Availability
    ChatGPT
    Not available
    Grammarly
    Available
  • Enterprise Security Controls
    ChatGPT
    Not available
    Grammarly
    Available
  • Grammar and Mistake Correction
    ChatGPT
    Not available
    Grammarly
    Available
  • Tone Detection and Adjustment
    ChatGPT
    Not available
    Grammarly
    Available
  • Full-Sentence and Paragraph Rewrites
    ChatGPT
    Not available
    Grammarly
    Available
  • AI Detector and Humanizer
    ChatGPT
    Not available
    Grammarly
    Available
  • Plagiarism Checker
    ChatGPT
    Not available
    Grammarly
    Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

  • Pricing model
    ChatGPT
    Freemium
    Grammarly
    Freemium
  • Free plan
    ChatGPT
    Yes
    Grammarly
    Yes
  • Starting price
    ChatGPT
    $0
    Grammarly
    $0
  • Plans
    ChatGPT
    8 plans
    Grammarly
    3 plans

ChatGPT plans

  • Free

    $0

    Limited access to OpenAI's models for everyday use

    • Limited messages
    • Limited file uploads
    • Limited image generation
    • May show ads in some regions

  • Go

    $8/month

    Low-cost plan with more usage than Free

    • More messages than Free
    • More uploads and image generation
    • May show ads

  • Plus

    Most popular

    $20/month

    For individuals who want more capable models and higher limits

    • Access to more advanced models
    • Projects
    • Expanded Codex
    • Higher limits for research and voice

  • Pro 100

    $100/month

    High-volume use for research and coding

    • About 5x Plus usage
    • Everything in Plus

  • Pro 200

    $200/month

    Higher usage than Pro 100

    • About 20x Plus usage
    • Everything in Plus

  • Pro 500

    $500/month

    Highest usage tier

    • Highest usage limits
    • Ultrafast model variants
    • Everything in Plus

  • Business

    $25/user/mo

    For small teams, with a two-seat minimum

    • Shared workspace
    • Admin controls
    • Business data not used for training by default

  • Enterprise

    Custom/user/mo

    For large organizations, priced by contract

    • Single sign-on
    • Admin and security controls
    • Dedicated support

Grammarly plans

  • Free

    $0

    Basic writing help for individuals

    • Mistake correction
    • tone visibility
    • 100 AI prompts/month

  • Pro

    Most popular

    $30/month

    Individuals and eligible teams wanting advanced rewrites and detection

    • 2,000 AI prompts/member/month
    • tone adjustment
    • full-sentence rewrites
    • plagiarism detection
    • AI-generated text detection
    • style guide
    • brand tone
    • priority support

  • Enterprise

    Custom/custom

    Larger organizations with security and governance needs

    • Unlimited AI prompts
    • unlimited style guides and brand tones
    • SAML SSO
    • SCIM
    • audit logs API
    • data loss prevention
    • dedicated support

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.

ChatGPT
8.9overall
Grammarly
8.2overall

  • General Reasoning & Logic

    ChatGPT
    9.0
    Grammarly
    Not rated

  • Conversational Fluency

    ChatGPT
    9.2
    Grammarly
    Not rated

  • Coding & Data Analysis

    ChatGPT
    8.8
    Grammarly
    Not rated

  • Multimodal Processing

    ChatGPT
    9.0
    Grammarly
    Not rated

  • Ecosystem & Integrations

    ChatGPT
    8.7
    Grammarly
    Not rated

  • Ease of Use

    ChatGPT
    Not rated
    Grammarly
    9.1

  • Feature Depth

    ChatGPT
    Not rated
    Grammarly
    8.3

  • Value for Money

    ChatGPT
    Not rated
    Grammarly
    7.3

  • Performance & Speed

    ChatGPT
    Not rated
    Grammarly
    8.4

  • Documentation & Support

    ChatGPT
    Not rated
    Grammarly
    8.0

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

ChatGPT

Pros

  • One assistant covers text, voice, images, file analysis, search and coding
  • Free tier lets users try the service without a card
  • Apps for web, iOS, Android, macOS and Windows with synced history
  • Large ecosystem of connectors, projects and agent features
  • Plans range from $8 to $500 per month, so users can match spend to usage

Cons

  • Free and Go usage limits are low and may include ads
  • Pricing and model lineup change often, which makes limits hard to compare over time
  • Answers can be wrong and need checking, especially for facts and citations
  • The top Pro tiers cost $100 to $500 per month

Grammarly

Pros

  • Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
  • Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.
  • Pro adds tone adjustment, full-sentence rewrites, plagiarism and AI-text detection in a single subscription.
  • Team features include style guides, brand tones, analytics and user groups; Enterprise adds SSO, SCIM and audit logs.
  • Public REST APIs exist for analytics, licence management, writing score and detection.

Cons

  • Monthly billing for Pro is $30, versus $12 per month on annual billing, so month-to-month use costs 2.5 times as much.
  • Third-party tests of the AI Detector report notable false-positive rates (figures range from 14.2% to 34% across sources), so it is unreliable as proof.
  • An App Store reviewer criticizes the iOS keyboard setup for pushing users to grant broad access.
  • Experienced writers on forums report turning off many suggestions; advanced features are gated behind Pro.

Platforms

  • Web
    ChatGPT
    Supported
    Grammarly
    Supported
  • Windows
    ChatGPT
    Supported
    Grammarly
    Supported
  • macOS
    ChatGPT
    Supported
    Grammarly
    Supported
  • iOS
    ChatGPT
    Supported
    Grammarly
    Supported
  • Android
    ChatGPT
    Supported
    Grammarly
    Supported
  • API
    ChatGPT
    Not supported
    Grammarly
    Supported
  • Browser Extension
    ChatGPT
    Not supported
    Grammarly
    Not supported
  • Chrome Extension
    ChatGPT
    Not supported
    Grammarly
    Supported
  • Firefox Extension
    ChatGPT
    Not supported
    Grammarly
    Supported

Integrations

ChatGPT

2 integrations
  • Gmail
  • MCP connectors

Grammarly

7 integrations
  • Microsoft Office
  • Google Docs
  • Chrome
  • Safari
  • Firefox
  • Edge
  • Zendesk

Company

  • Company
    ChatGPT
    OpenAI
    Grammarly
    Superhuman
  • Founded
    ChatGPT
    2015
    Grammarly
    2009
  • Headquarters
    ChatGPT
    San Francisco, CA
    Grammarly
    San Francisco, CA
  • Monthly users
    ChatGPT
    Not listed
    Grammarly
    40 million people
  • Listing
    ChatGPT
    Claimed
    Grammarly
    Claimed

Frequently asked questions

Is ChatGPT better than Grammarly?

It depends on your workflow. ChatGPT is built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant. Grammarly is built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team.

What are the key feature differences between ChatGPT and Grammarly?

ChatGPT: OpenAI's AI assistant for writing, research, coding, image generation and voice chat. Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app. ChatGPT is rated 4.0/5 from 1 user review.

Does ChatGPT or Grammarly have a free plan?

Yes, both do. ChatGPT is freemium and Grammarly is freemium, and each has a free plan or trial.

Which is cheaper, ChatGPT or Grammarly?

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.