Sider Freemium

Sider is an AI assistant that lives in a browser sidebar and can read the page you are on. It summarizes articles, chats with PDFs and lets you switch between models like GPT, Claude and Gemini. There is a free tier with daily credits; paid plans start around $8.30/month.

What is Sider?

It is a Chrome, Edge and Safari extension plus a web app. Instead of copying text into a chatbot tab, you click the sidebar and it already knows the page. It also handles selected text — rewrite, translate, explain — without leaving the site.

Product Features

• Page chat: ask questions about the page you are viewing and get sourced answers.
• PDF and document chat: upload files and query them, with page references.
• Multi-model switch: pick between GPT, Claude and Gemini class models inside one UI.
• Selection tools: rewrite, translate, summarize or explain highlighted text in place.
• Image tools: reading text from screenshots and basic image understanding.
• Sidebar everywhere: works on most sites including YouTube and Google Docs.

Product Highlights

• Free tier is credit-limited; heavy daily use runs out fast and pushes you to pay.
• Annual plans work out to roughly $8.30/month, monthly is higher.
• Multi-model access is convenient, though you get a menu of models rather than fine-grained control.
• Accuracy on long PDFs is decent but it can miss tables, so verify numbers.

Who should use Sider?

Useful if you read a lot on the web and want summaries and rewriting without juggling tabs. Less useful if you already pay for a single strong model with a good app — you would be paying twice for overlapping ability. Privacy-minded users should note pages are sent to third-party model providers.

Use Cases

• Summarizing a long research paper before a meeting.
• Rewriting a paragraph in a friendlier tone while writing an email.
• Asking questions about a 40-page PDF contract.
• Translating a foreign-language page in place.
• Comparing how two models answer the same prompt.

Quick Summary

• Sider is a browser sidebar AI assistant for Chrome, Edge, Safari and the web.
• It summarizes pages and PDFs and switches between GPT, Claude and Gemini class models.
• Free tier is credit-limited; paid is about $8.30/month annually.
• Best for heavy web readers and writers; redundant if you already pay for one strong model.