Sider
Your AI agent for the browser: one AI sidebar for everything you do in the browser.
Sider is an AI sidebar and browser agent, available as a Chrome extension and as apps. A free version is offered, and paid plans start at US$10 per month. It is built for people who want to summarize YouTube videos, summarize PDFs and web pages, and translate content without leaving the browser, using models such as GPT, Claude and Gemini.
What Sider does
Sider lives in a browser sidebar. Its chat side, Sider Chat, can summarize, explain or translate the page you are on, a PDF or a YouTube video, and lets you pick from models including GPT, Claude, Gemini and Grok. Translation also covers images. Other built-in tools include chatting with PDFs, AI Read Aloud, Audio to Text, Wisebase and Deep Research, plus generation of images, videos, slides and documents.
Two parts go beyond chat. Sider Hand is a browser agent that carries out multi-step tasks on real websites through the sessions you are already logged in to. Sider Code changes how a site looks or behaves from plain-language instructions and remembers those edits for next time.
You can add it to Chrome or Edge, and apps are listed for Mac, Windows, iOS and Android. The paid tiers, Nano, Lite, Pro and Max, are listed at US$10, US$25, US$50 and US$100 per month on its pricing page; yearly billing is up to 17% off, for example US$8.33 a month billed yearly at US$100 for Nano. Every plan includes every feature. What changes is the monthly credit allowance and the cloud computer: Nano gets a temporary one, while Lite and above get a dedicated machine.
Features
- AI sidebar chat with GPT, Claude, Gemini, Grok and more
- Summarize web pages, PDFs and YouTube videos
- Translate webpages, PDFs and images
- Browser agent that automates tasks across websites
- Customize any website with plain-language edits
- Generate images, videos, slides and documents
- ChatPDF
- AI Read Aloud
- Audio to Text
- Wisebase and Deep Research
Sider pricing
| Plan | Price | What's included (as stated) |
|---|---|---|
| Nano | $10/mobilled annually |
|
| Lite | $25/mobilled annually |
|
| Pro | $50/mobilled annually |
|
| Max | $100/mobilled annually |
|
Copied from Sider's pricing page on Nov 6, 2026. Prices change, so confirm before you buy.
Strengths and limits
Each point comes from the features and plan details above. No point is an opinion.
Strengths
- Summarizes web pages, PDFs and YouTube videos from one sidebar.
- Lets you choose among several AI models, including Claude and Gemini.
- All plans include all features; tiers differ by credits and cloud computer power.
- Yearly billing is up to 17% off the monthly price.
Limits
- Nano includes only a temporary cloud computer; a dedicated one starts on Lite.
- Paid usage is bounded by each plan's monthly credits.
Sider FAQ
Is Sider free?
Sider has a free version, and its paid plans start at US$10 per month for Nano.
What platforms is Sider on?
It is offered as a browser extension for Chrome and Edge, with apps listed for Mac, Windows, iOS and Android.
Where this listing comes from
Facts were read from these pages on Nov 6, 2026. The description was written from those facts. See the methodology.
Something out of date? Report a correction. Corrections are free.
Sider alternatives
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