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Sider AI Review 2026
AI browser sidebar assistant that provides ChatGPT, Claude, and Gemini access alongside any webpage for reading, writing, and research tasks.
4.4 / 5.0
Freemium40,000 ReviewsOur Verdict
Best for: Best for professionals, students, and knowledge workers who want instant access to multiple AI models in a browser sidebar for contextual reading assistance, writing help, and research without switching tabs.
Sider AI has become one of the most popular browser AI extensions by solving a genuine friction point: the constant tab switching between AI chat interfaces and the content you are actually working with. The sidebar format is inherently more efficient than standalone AI tools, and the multi-model access eliminates the need to choose a single AI provider. The comprehensive tool suite, custom prompt capabilities, and contextual page awareness make it a genuinely productive companion for anyone who spends significant time in the browser. The free tier is limited enough to require upgrading for regular use, but the paid plans offer excellent value given the multi-model access and breadth of features.
Reviewed by AiBestHub Editorial Team
Key Features
Multi-Model Sidebar: Access ChatGPT, Claude, Gemini, and other AI models in a persistent browser sidebar, switching between models instantly for different tasks or comparison.
Contextual Page Awareness: The AI automatically understands the content of the current webpage, enabling you to ask questions, request summaries, or extract information without copy-pasting.
Writing Assistant: Compose, rewrite, translate, and edit text in multiple tones and languages directly within the sidebar, with output ready to paste into any web form or document.
YouTube and PDF Tools: Summarize YouTube videos via transcript analysis and read, summarize, and ask questions about PDF documents opened in the browser.
Custom Prompt Library: Save and organize reusable prompts for common tasks, creating one-click workflows for repetitive AI interactions tailored to your specific needs.
Image Generation and Analysis: Generate images from text prompts and analyze images encountered while browsing, asking questions about visual content directly in the sidebar.
Pros
- The sidebar integration provides instant AI access alongside any webpage without tab switching, making it significantly more efficient than copying content to separate AI chat interfaces.
- Multi-model support with GPT-4, Claude, and Gemini in a single interface allows users to leverage each model's strengths and compare responses without managing multiple subscriptions or browser tabs.
- The comprehensive tool suite including image generation, PDF summarization, YouTube transcript analysis, and custom prompts extends the sidebar well beyond basic chat into a full productivity toolkit.
- Custom prompt libraries enable power users to create reusable workflows tailored to their specific tasks, turning repetitive AI interactions into one-click operations.
Cons
- The free tier provides limited daily queries across all models, which can be exhausted quickly by active users, requiring a paid subscription for meaningful regular usage.
- Running a persistent sidebar extension can consume additional browser memory and occasionally impact page loading performance, particularly on resource-heavy websites.
- The quality and speed of responses depend on the selected AI model's current performance and API availability, meaning occasional latency or degraded responses during high-demand periods.
Interface Preview
Pricing Details
Sider AI uses a freemium model with usage-based tiers that provide increasing levels of AI query capacity. The Free plan includes a limited number of daily queries, typically around 30 across all AI models, basic sidebar functionality, and access to the core chat, summarization, and translation features. The free tier is designed for casual users who want to experience the sidebar workflow before committing to a subscription. The Basic plan at $10 per month (or $8 per month billed annually) provides significantly more daily queries, access to all AI models including GPT-4 and Claude, the full writing assistant toolkit, YouTube and PDF summarization tools, and the custom prompt library. Basic users receive enough query capacity for moderate daily usage across reading, writing, and research tasks. The Pro plan at $20 per month (or $15 per month billed annually) offers substantially higher query limits approaching unlimited usage for most users, priority processing for faster response times, advanced features like image generation and analysis, early access to new models and tools, and the ability to use the most capable versions of each AI model without restrictions. The Ultimate plan at $30 per month (or $25 per month billed annually) provides truly unlimited queries across all models, maximum priority processing, team sharing features for custom prompts, and dedicated support. This tier is designed for power users who rely on Sider throughout their entire workday. Sider also offers a Team plan with centralized billing, admin controls, and shared prompt libraries starting at $15 per user per month. All paid plans include a free trial period, and the company frequently offers promotional pricing for annual subscriptions. Compared to subscribing separately to ChatGPT Plus ($20/month), Claude Pro ($20/month), and Gemini Advanced ($20/month), Sider's multi-model access represents significant cost savings for users who want access to multiple AI models.
Use Cases
1
Professionals reading industry articles and reports use the Sider sidebar to instantly ask clarifying questions about complex passages, request summaries of lengthy sections, and translate foreign-language content without leaving the page.
2
Writers and marketers use the writing assistant to draft and refine content across multiple platforms, composing emails in Gmail, social posts on LinkedIn, and blog drafts in their CMS, all with AI assistance available in the sidebar.
3
Students researching assignments open multiple source articles and use Sider to summarize each one, compare perspectives across sources by switching between AI models, and generate outline drafts based on their research.
4
Software developers browse documentation and Stack Overflow with the Sider sidebar open, asking the AI to explain code snippets, suggest alternatives, debug error messages, and translate between programming languages.
5
Customer support agents use Sider alongside their helpdesk platform to quickly draft professional responses, translate customer messages from different languages, and look up product information with AI assistance while managing tickets.
About Sider AI
Sider AI is a versatile browser sidebar assistant that brings the power of multiple AI models directly into your browsing experience without requiring you to switch tabs or leave the webpage you are working on. The extension places a persistent, resizable sidebar alongside any webpage, giving you instant access to ChatGPT, Claude, Gemini, and other leading AI models for reading assistance, writing help, research, translation, and general question-answering while maintaining full context of the page you are viewing. The core value proposition is contextual AI assistance. When you open the Sider sidebar on any webpage, the AI is immediately aware of the page content and can answer questions about it, summarize it, translate it, explain complex passages, or extract specific information without requiring you to copy and paste text into a separate AI chat window. This seamless integration means you can read a technical article and ask for clarification on a specific paragraph, browse a product page and ask the AI to compare it with competitors, or review a document and get instant feedback on its content. Sider's multi-model approach is a key differentiator. Rather than locking users into a single AI provider, Sider provides access to multiple models including GPT-4, Claude, Gemini, and others through a unified interface. Users can switch between models mid-conversation to compare responses, use different models for different types of tasks based on their strengths, or default to their preferred model for all interactions. This flexibility ensures users always have access to the best available AI for their specific need. The writing assistance features are comprehensive. Sider can help compose emails, draft social media posts, rewrite text in different tones, translate content between languages, fix grammar and spelling, and generate content based on prompts, all within the sidebar without leaving the current page. For professionals who write frequently across different platforms, having an AI writing assistant permanently available in the browser sidebar significantly streamlines the composition process. Sider also includes a suite of utility tools beyond conversational AI. The built-in tools include image generation, PDF reading and summarization, YouTube video summarization via transcript analysis, webpage screenshot annotation, and a chat-with-image feature that can analyze and answer questions about images you encounter while browsing. These tools transform the sidebar from a simple chat interface into a comprehensive AI productivity toolkit. The extension supports custom prompts and workflows that users can save and reuse. Power users create libraries of custom prompts tailored to their specific tasks, such as standardized review templates, research question frameworks, or content generation workflows that can be triggered with a single click from the sidebar.
4.4
Based on 40,000 reviews
App Details
- Categories
- Productivity, Chat
- Platforms
- Web
- Pricing
- Freemium
- Last Updated
- 2026-03-03
Tags
browser-extensionsidebarmulti-model
