Sider

The amount of time most of us spend switching between different AI tools—opening up ChatGPT in one browser tab, Claude in another, and then pasting in the same context to both—will frankly shock you if you think about it. Sider removes that all together. This browser extension (or application) sits on the right side of every webpage, PDF, and YouTube video that you browse, providing one place to call upon over 20 different AI models (including GPT-4o, Claude, Gemini, and DeepSeek) without ever actually leaving your content. Sider's group chat feature really does solve a big problem. You can throw a single prompt to multiple AI models at the same time and see what each one spits out next to each other. You will not find an easier way to get side-by-side comparisons without a lot of copy-pasting and frustration when you need to figure out which answer to trust. Finally, there is a helpful personal knowledge base function called "Wisebase," which organizes all your research, highlights, and notes from when you utilize other AI features so that you can recall that context later. The primary annoyance is its credit system; it is unclear exactly how quickly you will go through the available credit, and unused credit does not carry over from month to month. But for a little more than $8 per month and the ability to leverage so many different models simultaneously, it is tough to beat value for money here.

• Category: ChatGPT Extensions
• Pricing: Freemium
• Rating: 4.7 / 5 (0 reviews)
• Platforms: Chrome, Edge, Safari

Key features

• Persistent browser sidebar — AI assistant stays visible on every webpage, PDF, YouTube video, and document you open without switching tabs or losing context
• 20 plus AI models in one place — Access GPT-4o, Claude Sonnet, Gemini Pro, DeepSeek, Llama, and others from the same sidebar without separate subscriptions
• Group Chat — Send one prompt to multiple AI models simultaneously and compare their responses side by side to find the most reliable answer
• Deep Research Agent — Analyzes over 100 sources on any topic and compiles a structured research report far faster than manual searching
• Wisebase knowledge base — Automatically saves your research reports, web highlights, notes, and uploaded documents into a personal knowledge base you can chat with
• AI translation for 50 plus languages — Translates with contextual understanding that preserves tone, idioms, and nuance rather than word-for-word substitution
• YouTube and webpage summarization — Summarize any video or article in seconds directly from the sidebar without watching or reading in full
• Sider Fusion — Automatically selects the best AI model for each specific task based on cost, accuracy, and task type so you get better results without deciding yourself

Pros & Cons

Pros

• Over 10 million users and 40000 five-star Chrome reviews which is a meaningful signal of consistent reliability at scale
• Group Chat and side-by-side model comparison is a genuinely unique feature not available in any other browser extension
• At $8.30 per month for Basic it costs less than a single native subscription to most of the models it includes access to
• Wisebase knowledge base grows with your research over time which turns it into something more useful than a simple chat tool
• 4.9 star Chrome Web Store rating from over 40000 reviews is exceptionally high for a tool used this heavily

Cons

• Credit system is confusing and the site does not publish a clear breakdown of how many credits each task uses which makes budgeting difficult
• Unused credits do not roll over at the end of the month which feels punishing if your usage is uneven week to week
• Broad browser permissions required, Sider requests access to read and change data on all websites, which privacy-conscious users should review carefully before installing
• Free plan is limited to 30 basic credits per day which is not enough for regular daily use and pushes most users toward a paid plan quickly

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