Castly vs Jetwriter AI

Comparing the features of Castly to Jetwriter AI

Feature
Castly
Jetwriter AI

Capability Features

Ask Me Anything
Brainstorming
Chat with Page
Content Sharing
Data Encrypted In-Transit
Data Not Shared
Fix Grammar
Grammer Correction
High Quality Responses
Launch by Selecting Text
Launch from Extension Icon
Launch via Shortcut
Lightweight Extension
< 1MB
No Data Used for AI Training
Personalized AI Profile
Pro Tier PDF Uploads
Unlimited
Pro Tier Published Posts
Unlimited
Prompt Templates
Question Answering over Audio
Question Answering over YouTube
Research
Response Length Control
Select Text and Right-Click
Summarization
Supported Languages
Supported Writing Styles
Switch AI Models
Text Editor Interface
Translation
Unlimited Chats
Write Emails
Writing Improvement

Integration Features

Active Discord Community
AI Model Access
GPT-5Claude SonnetGemini ProChatGPTDeepSeekGemini FlashGPT-5 mini
PDF File Support
Popular Site Integrations
GmailLinkedInFreshdeskZoho
Supported Platform
Chrome ExtensionWeb AppMobile
Web App

Limitation Features

Extension Not Supported on All Browsers
Free Tier PDF Size Limit
10
Free Tier Published Posts
5
Pro Tier PDF Size Limit
50

Pricing Features

Free Tier
Free Tier PDF Uploads
5
Pro Plan Price
$12/month