Castly vs Kerlig™ AI Writing App for Mac

Comparing the features of Castly to Kerlig™ AI Writing App for Mac

Feature
Castly
Kerlig™ AI Writing App for Mac

Capability Features

Built-in Actions
ProofreadWrite Slack repliesChat with documentsFix spelling and grammarImprove writingSummarizeMake shorterConvert to TypeScript interfaceYouTube Script CreatorCareer coachSimplify
Chat History Availability
Chat Interface
Citations in Output
Content Sharing
Custom Actions
Custom Tone of Voice
Document Attachments
Edit Messages
Headless Mode
Multi-step Research
Native macOS App
On-device Data Storage
Preset Customization
Pro Tier PDF Uploads
Unlimited
Pro Tier Published Posts
Unlimited
Question Answering over Audio
Question Answering over YouTube
Reasoning Models
Regenerate Responses
Shortcuts & Hotkeys
Team Deployment via CLI
Text Editor Interface
Unlimited Chats

Integration Features

Active Discord Community
Attachment Types
DocumentsEbooksImages
Local Model Operation
Apple Foundation ModelsOllamaLM Studio
Multiple AI Provider Integration
Apple Foundation ModelsOpenAIAnthropicGoogle GeminiGroq CloudOllamaOpenRouterx AIPerplexityLM StudioMistralAmazon Bedrock
Number of Supported Models
350
PDF File Support
Third Party App Support
SlackJiraEmail (generic)

Limitation Features

API Key Support
Free Tier PDF Size Limit
10
Free Tier Published Posts
5
Limited to Mac Platform
macOS Support
Apple Silicon & Intel, macOS 12+
Pro Tier PDF Size Limit
50
Token Costs Not Included

Other Features

Support Response Time
24h email support
Support Response Time Team
Priority Zoom & email support

Pricing Features

App Updates Period
Lifetime (October Deal) or 1 year
Basic License Price
$49 (October Deal, reg. $247)
Basic License Seats
1
Free Tier
Free Tier PDF Uploads
5
Lifetime Updates
No Subscription Required
Pro License Price
$79 (October Deal, reg. $467)
Pro License Seats
2
Pro Plan Price
$12/month
Refund Policy Duration
14-day money back guarantee
Team License
$297/once
Team License Seats
10