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Grammarly vs Runway

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

Grammarly logo

Grammarly

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

Freemium
Visit websiteView details

Verdict

Grammarly is listed under AI Assistants and Runway under Image & Visual AI. Both have a free plan or trial. Only Grammarly is available on Windows, macOS and Chrome Extension.

Best overall

Runway

  • Filmmakers
  • Video creators
  • Marketers and ad teams
  • Designers

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.

Choose Runway if

  • You want a tool built for Text-to-video and image-to-video generation.
  • Combines video, image and audio generation and editing in one workspace.
  • Offers Runway's own Gen-4.5 plus third-party models such as Seedance 2.0.
Best for beginners
Grammarly
Best for business
Grammarly

Features

18 features compared.

  • Citation Tools
    Grammarly
    Available
    Runway
    Not available
  • Style Guides and Brand Tones
    Grammarly
    Available
    Runway
    Not available
  • Cross-App Availability
    Grammarly
    Available
    Runway
    Not available
  • Enterprise Security Controls
    Grammarly
    Available
    Runway
    Not available
  • Grammar and Mistake Correction
    Grammarly
    Available
    Runway
    Not available
  • Tone Detection and Adjustment
    Grammarly
    Available
    Runway
    Not available
  • Full-Sentence and Paragraph Rewrites
    Grammarly
    Available
    Runway
    Not available
  • AI Detector and Humanizer
    Grammarly
    Available
    Runway
    Not available
  • Plagiarism Checker
    Grammarly
    Available
    Runway
    Not available
  • Gen-4.5 video model
    Grammarly
    Not available
    Runway
    Available
  • Creative Agent
    Grammarly
    Not available
    Runway
    Available
  • Multiple models
    Grammarly
    Not available
    Runway
    Available
  • Characters
    Grammarly
    Not available
    Runway
    Available
  • Aleph and Act-Two
    Grammarly
    Not available
    Runway
    Available
  • Audio tools
    Grammarly
    Not available
    Runway
    Available
  • Workflows and Recipes
    Grammarly
    Not available
    Runway
    Available
  • Runway Dev API
    Grammarly
    Not available
    Runway
    Available
  • Runway MCP
    Grammarly
    Not available
    Runway
    Available

Pricing

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

  • Pricing model
    Grammarly
    Freemium
    Runway
    Freemium
  • Free plan
    Grammarly
    Yes
    Runway
    Yes
  • Starting price
    Grammarly
    $0
    Runway
    $0
  • Plans
    Grammarly
    3 plans
    Runway
    4 plans

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

Runway plans

  • Free

    $0

    125 one-time credits that do not expire

    • A selection of generative models
    • 5GB storage

  • Standard

    $15/month

    625 credits per month; $12 per month billed annually

    • All video and image models
    • Creative Agent
    • 5 parallel generations
    • Music and voice and sound effects
    • Up to 3 projects
    • No watermarks
    • 4K upscaling
    • 20GB storage

  • Pro

    Most popular

    $35/month

    2,250 credits per month; $28 per month billed annually

    • Everything in Standard
    • 15 parallel generations
    • Up to 5 projects
    • 1 Brand Kit
    • 1 custom voice clone
    • Top-up credits
    • Runway MCP
    • Unlimited 4K video upscaling
    • 100GB storage

  • Max

    $95/month

    9,500 credits per month; $76 per month billed annually

    • Everything in Pro
    • Early access to new models
    • 20 parallel generations
    • Up to 10 projects
    • Up to 3 Brand Kits
    • Up to 3 custom voice clones
    • HDR and ProRes and image sequence outputs
    • 500GB storage

Our ratings

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

Grammarly
8.2overall
Runway
8.4overall

  • Ease of Use

    Grammarly
    9.1
    Runway
    Not rated

  • Feature Depth

    Grammarly
    8.3
    Runway
    Not rated

  • Value for Money

    Grammarly
    7.3
    Runway
    Not rated

  • Performance & Speed

    Grammarly
    8.4
    Runway
    Not rated

  • Documentation & Support

    Grammarly
    8.0
    Runway
    Not rated

  • Video Quality

    Grammarly
    Not rated
    Runway
    9.0

  • Camera & Motion Control

    Grammarly
    Not rated
    Runway
    8.8

  • Model Variety

    Grammarly
    Not rated
    Runway
    8.5

  • Editing Tools

    Grammarly
    Not rated
    Runway
    8.6

  • Pricing Clarity

    Grammarly
    Not rated
    Runway
    7.2

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

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.

Runway

Pros

  • Combines video, image and audio generation and editing in one workspace
  • Offers Runway's own Gen-4.5 plus third-party models such as Seedance 2.0
  • Creative Agent builds videos from a conversation
  • Runway Dev API with Node and Python SDKs
  • Free plan with 125 credits that do not expire
  • Native iOS and Android apps

Cons

  • Credit-based pricing: a 5-second Gen-4.5 clip costs 60 credits, so the 625 credits on Standard cover about 10 such clips
  • Standard and Pro credits do not roll over at the end of the month
  • Some App Store reviewers complain about the cost of failed or unusable generations
  • 4K upscaling is unlimited only on Pro and Max

Platforms

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

Integrations

Grammarly

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

Runway

5 integrations
  • Runway MCP
  • ChatGPT plugin
  • Meta Ads
  • Google Ads
  • TikTok Ads

Company

  • Company
    Grammarly
    Superhuman
    Runway
    Runway AI, Inc.
  • Founded
    Grammarly
    2009
    Runway
    2018
  • Headquarters
    Grammarly
    San Francisco, CA
    Runway
    New York, NY
  • Monthly users
    Grammarly
    40 million people
    Runway
    Not listed
  • Listing
    Grammarly
    Claimed
    Runway
    Claimed

Frequently asked questions

Is Grammarly better than Runway?

It depends on your workflow. Grammarly is built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team. Runway is built for Text-to-video and image-to-video generation.

What are the key feature differences between Grammarly and Runway?

Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app. Runway: AI video, image and audio creation suite with Gen-4.5, agents and an API.

Does Grammarly or Runway have a free plan?

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

Which is cheaper, Grammarly or Runway?

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