Sider is an AI assistant platform available as a browser extension and standalone application. It aggregates multiple AI models — including ChatGPT, Claude, Gemini, and others — allowing users to switch between them within a single interface. Core capabilities include contextual chat alongside web pages and PDFs, text summarization, translation, writing assistance, grammar checking, and image analysis. Users can highlight text on any webpage to trigger AI-powered actions such as explanation, rewriting, or translation. Sider also supports document reading, where users can upload files and ask questions about their content. The product targets individuals and teams seeking to enhance productivity through AI assistance embedded directly into their browsing and reading workflows. It is accessible via a Chrome or Edge browser extension, as well as dedicated desktop and mobile applications.
Target audience and deployment
- Solo / Freelancer
- Startup
- SMB
- Browser extension
- Cloud
Key features
Use cases
- Summarize web pages and documents
- Translate text across languages
- Assist with writing and editing
- Chat with multiple AI models
- Analyze and query PDF documents
- Explain and define selected text
Best for
- Researchers who need to quickly summarize and extract insights from web content and documents
- Writers and editors who need AI-assisted drafting, rewriting, and grammar support in their browser
- Professionals who need to compare outputs from multiple AI models in a single workflow
- Non-native speakers who need real-time translation and language assistance while browsing
Integrations
AI models included
ChatGPT, Claude, Gemini