Side by side
Pillar | App Copilot vs RewriteBar
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
Open source copilot turning requests into actions.
Rewrite. Refine. Accelerate. — AI productivity for every macOS app. 🚀
Primary task
App assistant
Writing
Pricing
Free Trial · Trial; then from $19/mo
Free Trial · Trial; then from $29
Pricing details
Free + from $19/mo
Free + from $29
Billing cycle
Monthly
One-time
API access
Listed as available
Listed as available
Platforms
Web
Web, macOS
Integrations
MCP
Slack
Source rating
5.0 / 5 · 1 ratings
4.8 / 5 · 6 ratings
Catalog views
658
39k
Estimated monthly traffic
—
—
Catalog imported
31 Aug 2026
30 Aug 2026
Listed strengths
- Open-source tool
- Turns requests into actions
- Performs client-side actions
- Eliminates need for proxy servers
- Performs local UI actions
- Fixes grammar and spelling errors instantly
- Works offline with local models like Ollama or LM Studio
- Works across all macOS applications — Mail, Slack, Notion, VS Code, Figma, etc.
- Lightweight (≈20MB), optimized for Apple Silicon
- Custom AI actions and reusable templates for advanced workflows
Listed limitations
- Only works in-browser
- Depends on user's session
- Has no standalone interface
- Limited to existing CSS
- No proxy servers supported
- macOS only — not available for Windows or web yet
- Learning curve for creating custom AI actions (advanced users benefit most)
- No built-in voice or speech input support (text only)
- Requires macOS Ventura (13.0) or newer
- Needs macOS accessibility permissions to function across apps