CustomGPT vs Grammarly
A detailed comparison to help you choose the right AI tool for your needs.
Our Pick
Grammarly
Grammarly edges out CustomGPT with superior overall performance and features that make it the better choice for most users.
Try GrammarlyFeature Comparison
Feature
CustomGPT
Grammarly
Ratings
Overall Rating
4.4
4.6
Coding
-
-
Writing
4.0
4.8
Reasoning
4.0
4.0
Speed
4.5
5.0
Value
4.3
4.5
Pricing
Monthly Price
$49
$12
Free Tier
Input (per 1M tokens)
-
-
Output (per 1M tokens)
-
-
Features
Context Window
100K
50K
Vision/Images
Audio
Video
Code Generation
AI Agents
CustomGPT
Pros
- No-code chatbot builder
- Train on your own data
- Great for customer service
- Easy to deploy on websites
- MIT case study validation
Cons
- Not for coding tasks
- Limited customization vs building from scratch
- Pricing can add up with usage
Grammarly
Pros
- Works everywhere (browser, desktop, mobile)
- Excellent grammar and spelling
- Tone detection
- Plagiarism checker
- GrammarlyGO AI assistant
Cons
- Not for creative writing
- Premium features require subscription
- Can be overly corrective
Choose CustomGPT if you need:
Business chatbots, customer service, knowledge bases
Choose Grammarly if you need:
Grammar checking, professional emails, academic writing
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.