Sidebar AI assistant for instant page Q&A
Introduction
Sider is a veteran page-side AI assistant with millions of Chrome installs: selection explanations, full-page summaries, PDF chat and AI search as a browsing companion. Multi-model switching (GPT/Claude/Gemini/DeepSeek) adds AI efficiency to every web scenario.
Key Features
- Page-side sidebar chat
- Selection explain and translate
- PDF/page full summaries
- Multi-model switching
- OCR and screenshot Q&A
Pros
- Huge install base, mature ecosystem
- Covers all web scenarios
Cons
- Few free uses
Pricing
Free allowance plus subscription.（See official site for current pricing）
FAQ
Sider or Monica?
Similar — trial both free tiers first.
Includes GPT quota?
Subscriptions include usage; own keys also supported.
Edge support?
Yes, Chrome/Edge/Safari.
Related Sites
Collected on lucifer.city · Reviewed by the founder