Sider
Your AI sidebar for smarter browsing, writing, and research.
Quick verdict
Sider is a freemium AI-powered browser extension that brings a versatile AI assistant sidebar directly into your web browser, allowing you to chat, summarize, translate, write, and analyze content without ever leaving your current tab. It is designed for professionals, students, and everyday users who want to boost productivity while browsing by integrating powerful AI models—including GPT-4, Claude, and Gemini—into a single, easy-to-access panel. What makes Sider stand out is its ability to work contextually alongside any webpage, letting you highlight text to instantly get explanations, translations, or rewrites, and ask follow-up questions about the content you are reading. The extension also supports document and PDF analysis, image understanding, and AI-powered writing assistance, making it a multipurpose tool rather than a single-function add-on. Whether you are a researcher pulling insights from articles, a marketer drafting copy, or a student studying complex material, Sider aims to be the AI co-pilot that lives permanently in your browser sidebar.
Key features
- ▸Multi-model AI chat supporting GPT-4, Claude, and Gemini in one sidebar
- ▸Instant webpage text selection for summaries, translations, and rewrites
- ▸PDF and document analysis with conversational Q&A
- ▸AI writing assistant for drafting, editing, and tone adjustment
Pros & cons
- +Access to multiple leading AI models in a single unified interface
- +Deeply integrated with the browser for seamless, context-aware assistance
- +Broad feature set covering writing, research, translation, and image analysis
- −Free tier has daily usage limits that may feel restrictive for power users
- −As a browser extension, it is not available as a standalone desktop or mobile app
Pricing
Free plan with limited daily queries and access to basic AI models
$4.20/month (billed annually)
Custom pricing available for teams and organizations
Who is it for
- →Summarizing long articles or research papers while reading them online
- →Translating foreign-language web content in real time
- →Drafting and refining marketing copy or emails directly in the browser
- →Asking contextual questions about any webpage without switching tabs
Frequently asked questions
Is Sider free?
Yes, Sider offers a free plan that includes a limited number of daily AI queries and access to basic AI models. For heavier usage or access to premium models like GPT-4 and Claude, a paid subscription is required.
What is Sider best used for?
Sider is best used for enhancing productivity while browsing the web. It excels at summarizing articles, translating content, assisting with writing tasks, and answering questions about any webpage or document you are currently viewing.
What are the best alternatives to Sider?
The top alternatives to Sider include Merlin, Monica, ChatGPT's browser extension, Copilot in Microsoft Edge, and MaxAI.me. Each offers a browser-integrated AI assistant with varying model support and feature sets.
Is Sider safe to use?
Sider is generally considered safe to use and has a published privacy policy. Like any browser extension, it requests certain permissions to function contextually on webpages. Users concerned about privacy should review its permissions and data handling practices before installing.
How much does Sider cost?
Sider's paid plans start at approximately $4.20 per month when billed annually. There is also a free tier with limited daily queries. Premium plans unlock higher usage limits, access to advanced AI models, and additional features.