# Sider review > Sider is an in-browser AI copilot and agent that embeds multi-model AI access (including GPT, Claude, and Gemini) into a unified sidebar for chatting, multi-site automation, and website customization. - Canonical: https://toolsrankai.com/tools/sider - Official site: https://sider.ai/ - ToolsRank rank / score: #348 / 71.3 (methodology https://toolsrankai.com/methodology) - Categories: AI Assistants, AI Browser Extensions, AI Chat with Documents & PDFs - Pricing: Freemium / Education plan available. At the review date, the vendor offers free access alongside paid upgrades and an education plan, but specific plan tiers, credit limits, and subscription prices are not disclosed on the homepage. Verify current rates on the official pricing page. - Fact-checked: 2026-09-08 · First listed: 2026-09-08 ## Verdict Sider suits knowledge workers, students, and power web users who want continuous AI assistance, PDF querying, and automated browser tasks without switching tabs. It is less suited for organizations requiring self-hosted infrastructure, strict local-only data privacy, or unified team-wide enterprise governance. ## What it is Sider operates as an omnipresent sidebar and agent inside web browsers and across desktop and mobile platforms. Built around three primary operational modules—Chat, Claw, and Code—the tool helps users process information, run browser-based automations, and modify web interfaces on the fly. The Chat feature provides access to frontier models like GPT, Claude, and Gemini directly alongside web browsing. It handles contextual reading tasks such as summarizing long articles, translating foreign languages, analyzing YouTube videos, and answering questions about active web pages or uploaded documents. Through specialized companion tools like ChatPDF, PDF Translator, and Wisebase Deep Research, users can also query documents and perform deeper academic or mathematical queries. Beyond conversational assistance, the Claw module functions as an autonomous browser agent. It carries out complex research, compares product prices across multiple websites, extracts structured details, and automates multi-step online tasks while leveraging existing logged-in sessions. Additionally, the Code module allows users to describe website modifications in plain English, restyling, simplifying, and remembering interface alterations across future browser visits. **What makes it different:** Unlike standalone chatbot interfaces or simple text rewriters, Sider couples multi-model access (GPT, Claude, Gemini) with an active browser agent (Sider Claw) that navigates multi-site workflows using your active sessions, alongside page-level styling customization (Sider Code). **Best for:** summarizing articles, cross-site research, interacting with PDFs, and accessing multiple AI models from a persistent browser sidebar **Not ideal for:** teams demanding air-gapped security, enterprise-managed LLM gateways, or developers looking purely for native code repository agents ## Key features - **Sider Chat** — Access multiple frontier models including GPT, Claude, and Gemini in a sidebar to summarize web pages, explain concepts, and analyze YouTube videos. - **Sider Claw** — An autonomous browser agent that executes multi-step web tasks, extracts information, and compares products across sites using logged-in user sessions. - **Sider Code** — Allows users to customize, restyle, and simplify web layouts using natural-language instructions, saving page adjustments for future visits. - **ChatPDF & Document Translators** — Inspect, translate, and question PDFs and uploaded files directly in the browser workflow. - **Wisebase & Deep Research** — Dedicated research modules for deep web investigation, academic scholar research, and math problem solving. - **Cross-Platform Ecosystem** — Synchronized single-account experience spanning Chrome, Edge, macOS, Windows, iOS, and Android applications. ## Use cases - **Cross-Store E-Commerce Comparison** — Instruct Sider Claw to research hardware components or items across sites like Amazon, Best Buy, and eBay, returning a consolidated budget summary. - **Document and Video Analysis** — Read papers, query PDF documents via ChatPDF, and summarize lengthy YouTube videos in the sidebar without opening separate chat applications. - **Personalized Web Restyling** — Use Sider Code to declutter busy websites or modify web styling through conversational prompts, retaining changes permanently. ## How it works 1. Install the Sider extension on Chrome or Edge, or download the app for desktop or mobile. 2. Open the sidebar while browsing any webpage or document to access Sider Chat with GPT, Claude, or Gemini. 3. Use Sider Claw to delegate multi-step web research tasks across websites using active browsing sessions. 4. Use Sider Code to restyle or customize website elements using natural language instructions. ## Pros - Integrates leading AI models (GPT, Claude, Gemini) directly into the browser workflow. - Browser agent can execute autonomous tasks across multiple websites using existing user sessions. - Comprehensive cross-device availability spanning Chrome, Edge, desktop, and mobile. ## Limitations - Specific credit limits and tier breakdowns are not detailed on the homepage. - Autonomous browser actions require granting broad access to browsing sessions and web page contents. ## Pricing At the review date, the vendor offers free access alongside paid upgrades and an education plan, but specific plan tiers, credit limits, and subscription prices are not disclosed on the homepage. Verify current rates on the official pricing page. Vendor prices and limits change; verify on the official pricing page before purchasing. ## Score factors - editorial: 75 (editorial) - utility: 82 (editorial) - trust: 78 (editorial) - freshness: 88 (editorial) - engagement: 0 (measured) - momentum: 50 (measured) ## Languages, platforms, integrations - Languages: English, Spanish, Portuguese - Platforms: Chrome, Edge, macOS, Windows, iOS, Android - Integrations: Google Chrome, Microsoft Edge, YouTube, Amazon, Best Buy, eBay ## FAQ ### What models can I use with Sider? According to the official site, Sider provides access to leading LLMs including GPT, Claude, and Gemini within its unified chat interface. ### What is Sider Claw? Sider Claw is an autonomous browser agent feature designed to handle multi-step web tasks. It navigates live websites, utilizes existing logged-in sessions, extracts data, and compares items across different platforms automatically. ### What platforms and browsers does Sider support? Sider is available as an extension for Google Chrome and Microsoft Edge, as well as native applications for macOS, Windows, iOS, and Android. ### Does Sider offer a free version? Yes, Sider provides free installation and access ('Get Sider for Free' / 'Add to Chrome'), alongside specialized paid tiers and an Education Plan. ## Alternatives - [ChatGPT](https://toolsrankai.com/tools/chatgpt) — A broad multimodal assistant for research, creation, analysis, and agentic work. - [Claude](https://toolsrankai.com/tools/claude) — A thoughtful AI collaborator for writing, analysis, coding, and long-form work. - [Google Gemini](https://toolsrankai.com/tools/gemini) — Google's multimodal assistant with deep hooks into Search, Workspace, and Android. - [Perplexity](https://toolsrankai.com/tools/perplexity) — An answer engine built around current web research and visible citations. ## Sources checked - [Sider AI Official Homepage](https://sider.ai/) --- Cite https://toolsrankai.com/tools/sider for ToolsRank's editorial judgment; verify changing vendor facts through the sources above. Reviewed 2026-09-08.