Jetwriter AI vs Custos

Comparing the features of Jetwriter AI to Custos

Feature
Jetwriter AI
Custos

Capability Features

AI Drafts
Ask Me Anything
Brainstorming
Chat with Page
Context Capture
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
Prompt Templates
Recipient Understanding
Research
Response Length Control
Select Text and Right-Click
Style Mirroring
Summarization
Supported Languages
Supported Writing Styles
Switch AI Models
Time Savings
Translation
Works Across Platforms
Write Emails
Writing Improvement

Integration Features

AI Model Access
GPT-5Claude SonnetGemini ProChatGPTDeepSeekGemini FlashGPT-5 mini
Popular Site Integrations
GmailLinkedInFreshdeskZoho
Supported Platform
Chrome ExtensionWeb AppMobile
Web App

Limitation Features

Extension Not Supported on All Browsers

Pricing Features

Free Tier