Grammarly vs ChatGPT Plus: Detailed Comparison for 2026

Last updated: January 2026 • 8 min read

Trying to decide between Grammarly and ChatGPT Plus? Both are popular tools in the writing assistant space, but they serve different needs. This comparison breaks down features, pricing, and use cases to help you make the right choice.

Quick Comparison

Feature Grammarly ChatGPT Plus
Category Writing Assistant AI Assistant
Starting Price $12/mo $20/mo
Best For Proofreading and grammar General AI assistance and ideation
Video Automation ❌ Manual ❌ Manual

Grammarly Overview

Grammarly

$12/mo

Proofreading and grammar.

✓ Pros

  • Grammar checking
  • Tone detection
  • Browser extension

✗ Cons

  • Editing only, no creation
  • No video
  • Limited AI generation

ChatGPT Plus Overview

ChatGPT Plus

$20/mo

General AI assistance and ideation.

✓ Pros

  • Versatile AI
  • Great for brainstorming
  • Constantly improving

✗ Cons

  • No video creation
  • No publishing
  • Manual copy-paste

Pricing Comparison

Grammarly starts at $12/mo, while ChatGPT Plus starts at $20/mo. Consider not just the sticker price but the total cost of ownership — including the time you'll spend using each tool.

If you value your time at $50/hour and spend 5 hours/week on content creation, that's $1,000/month in time cost alone — regardless of which tool you choose.

Which Should You Choose?

Our Verdict

Choose Grammarly if: You need proofreading and grammar and prefer grammar checking.

Choose ChatGPT Plus if: You need general ai assistance and ideation and value versatile ai.

Consider neither if: You want automated video content without ongoing manual effort. Both tools require continuous time investment.

The Alternative: zSellify for Automated Video Marketing

While Grammarly and ChatGPT Plus both require manual effort for each piece of content, there's a fundamentally different approach worth considering.

zSellify is Video Presence Infrastructure that automatically converts your existing website content into short-form videos and publishes them to YouTube Shorts and Bluesky — with zero ongoing effort after a 10-minute setup.

Why consider zSellify instead?

730 videos/year — 2 videos published daily, automatically

$129/month — flat pricing, no per-video costs

Zero manual effort — set up once, runs forever

Uses your existing content — no filming or scripting needed

Multi-platform publishing — YouTube + Bluesky automatically

If your goal is consistent video presence without the time investment that Grammarly or ChatGPT Plus require, check out zSellify's plans.

Related Comparisons

Still researching? Check out these related comparisons:

🎬 Skip the Manual Work Entirely

zSellify creates and publishes 2 videos/day from your existing website content. No filming. No editing. No scheduling.

See How It Works →