Sider

What is Sider?

Sider is an AI sidebar that puts several chat models beside whatever you are doing in the browser. Its site calls it “one AI sidebar for everything you do in the browser”, and its Chrome listing names Vidline Inc. as the developer.

It works as a browser extension. You open the panel on any page and ask a model such as ChatGPT, Claude, Gemini, Grok or DeepSeek to summarise, explain or translate what is on screen. Newer tools automate research across sites and restyle pages. Mobile and desktop apps extend it beyond the browser.

Key Features

Sider’s key features are a multi-model chat sidebar, page, PDF and YouTube summaries and translation, group chat between models, the Hand browser agent, Code for restyling websites and Create for images, videos and slides.

• Multi-model chat: Puts ChatGPT, Claude, Gemini, Grok and DeepSeek in one panel beside the page, and the Chrome listing also names Llama. You switch model per question.
• Page tools: Summarises, explains and translates web pages, PDFs and YouTube videos. The Chrome listing cites translation in more than 50 languages and bilingual video subtitles.
• Group chat: Sends one question to several models and shows the answers side by side, which makes it easy to compare them.
• Hand: Automates research, comparison, form filling and data extraction across real websites, including sites you are logged in to. Lite plans and above add a dedicated cloud computer that runs Hand 24/7.
• Code: Edits and restyles any website and saves the change, so your preferred version loads on later visits.
• Create: Generates images, videos, slides and documents from a prompt, with editing tools such as a background remover and image upscaler.
• Wisebase: Groups study and research tools, including Deep Research, Scholar Research, Math Solver, Audio To Text and ChatPDF.
• Writing and Gmail help: Drafts, rewords and adjusts tone in text boxes, and the Chrome listing includes an AI assistant for Gmail.

Pros

Sider’s main advantages are that several AI models sit beside the page you are reading, every plan includes every feature, it runs on browsers, desktop and mobile, and its Chrome extension is widely used.

• No tab switching: The AI panel opens beside the page you are reading, so summaries, translations and drafts happen without leaving the tab.
• Model choice: You can pick the model that suits each task, or ask several at once, without holding a separate subscription for each provider.
• All features on every plan: The official pricing page states that all plans include all features. Plans differ only by monthly credits and cloud computer power.
• Wide device support: Sider offers browser extensions, macOS and Windows apps and iOS and Android apps.
• Large user base: The Chrome listing shows more than 5,000,000 users and a 4.9 rating from about 114,500 ratings.
• Actively updated: The Chrome listing showed version 5.34.1, updated on 1 October 2026, when we checked.
• Commercial use allowed: The pricing page lists commercial use among the plan features, and the terms say users keep the rights to generated content.

Cons

Sider’s main drawbacks are its credit-based plans, yearly prices that run from $100 to $1,000, non-refundable fees and the broad access to page content that a browser sidebar requires.

• Credit system: Plans differ by monthly credits, and the credit allowance for each plan did not display on the public pricing page without logging in when we checked.
• Yearly billing for the best price: Nano costs $8.33 a month only when billed yearly at $100. Monthly billing costs more, because the yearly price carries a 17% discount.
• Top plans are costly: Pro is billed at $500 a year and Max at $1,000 a year, which is more than several single-model subscriptions.
• Fees are non-refundable: Sider’s terms of use state that fees are non-refundable unless otherwise stated, so test the free tier before paying for a year.
• Broad page access: The Chrome listing discloses that the extension handles personally identifiable information and website content, and Hand can act inside logged-in sessions.
• Free tier limits unpublished: The pricing page lists paid plans only. Review sites report a small daily free allowance, which Sider does not confirm there.

Who is Using Sider?

• Researchers and students: Summarise papers, PDFs and videos.
• Writers and marketers: Draft and rewrite text in place.
• Multilingual readers: Translate pages and subtitles.
• AI power users: Compare several models on one question.

Pricing

Sider has a free tier and four individual paid plans. Its official pricing page lists the prices below on yearly billing, which is 17% cheaper than monthly billing (checked 6 October 2026).

All plans include all features and differ by monthly credits and cloud computer power. Team plans are listed separately, and fees are non-refundable unless stated.

Disclaimer: Pricing can change. Check the official Sider website.

What Makes Sider Unique?

Sider stands out for gathering many AI models in one sidebar. You can ask several models the same question and compare replies without separate subscriptions or tabs. The newer automation and page-editing tools push it beyond a simple chat panel.

Compatibilities and Integrations

• Browsers: Chrome, Edge and Firefox extensions.
• Desktop: macOS and Windows apps.
• Mobile: iOS and Android apps.
• API: No public API confirmed.

Sider Tutorials

You can learn how to use Sider in just a few minutes:

1. Install the Sider extension from your browser’s store.
2. Sign in and open the sidebar on any page.
3. Choose a model and ask for a summary or translation.
4. Try group chat to compare two models on one question.

How We Rated It

Summary

Sider is a capable AI sidebar for people who use several models every day. Start on the free tier, confirm the current price on the official page and review the extension’s permissions before using it on sensitive sites. Casual users may find the free allowance enough for occasional summaries.