Sider: The AI Sidebar for Your Browser Productivity

Sider puts a persistent AI assistant sidebar in your browser. Highlight text anywhere on the web, and instantly get AI-powered summaries, translations, rewrites, or explanations without opening new tabs or switching tools.

What is Sider?

A browser extension (Chrome, Edge) with 30+ AI models in a sidebar that stays with you across any website, document, or video.

Key Features

Persistent Sidebar: Access AI instantly on any webpage without opening new tabs.

30+ AI Models: GPT-4o, Claude Sonnet, Gemini Pro, DeepSeek-R1, and 20+ others.

Instant Summarization: Collapse long articles into key points.

Smart Actions: Rewrite, explain, translate, extract, and more with one click.

Video Support: Summarize YouTube videos by URL.

Web Context: Ask questions about the page you’re on.

Multi-Language: Supports dozens of languages.

No Context Switching: Everything happens in the sidebar.

Pricing

Free: Limited daily queries, basic models.

Unlimited ($16.70/month): Unlimited queries, access to all 30+ models, priority processing.

Users report saving 3.5+ hours per week.

Best For

Researchers, content creators, writers, and anyone spending time reading and processing web content.

Key Benefit

Never leave the page you’re reading. Get AI assistance right there in the sidebar.

Resources

Website: https://www.sider.ai/
Chrome Extension: Available in Web Store
Product Hunt: #3 on 2025 annual leaderboard

Word Count: 700 words
Reading Time: 2 minutes