Sider
AI sidebar for the browser with many models and mobile apps
What is Sider?
Sider is an AI assistant from Vidline Inc. built around a browser sidebar for Chrome, Edge and Safari, with apps for iOS, Android, Windows and Mac under the same account. It gives access to GPT, Claude, Gemini, Grok, DeepSeek and other models for chatting, searching, reading, writing and translating in the context of the page you are on, and adds a knowledge base called Wisebase. It is free to install, and paid plans are sold as subscriptions.
Sider has a free plan. Paid plans start at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year. See every plan
Good for
- People who want an AI side panel on every browser tab
- Comparing answers from several models in a single chat
- Summarizing and translating pages, PDFs and YouTube videos
Worth knowing
- Sider's website answers automated readers with a security check, so the prices here are US App Store in-app prices and web prices may differ.
- The store listings do not say how much usage the free tier includes or what each paid plan adds.
- Sider told an App Store reviewer that the Pocket Plan is for mobile use and that its credits cannot be spent in the desktop browser.
- The App Store also lists legacy Basic subscriptions and a $40.00 Plus plan without describing them, and Google Play shows items from $9.99 to $999.99.
Key features
- Sidebar with many models
- The extension opens a side panel on any tab for chatting with GPT, Claude, Gemini, Grok, DeepSeek and other models. A Fusion model picks a model for each request automatically.
- AI group chat
- Put the same question to several models in one chat by @-mentioning them, then compare their answers as they arrive.
- Chat with files and pages
- Ask questions about PDFs, images, audio files, a web page or several open tabs. The mobile app accepts more than 30 file formats as well as images and URLs.
- Reading and video summaries
- Summarizes articles, web pages and PDFs, and condenses YouTube videos into highlights, with bilingual subtitles available while watching.
- Writing and translation
- Offers writing help in any input box, rewording and tone changes, a grammar checker, and translation of selected text, full pages, PDFs and images into 50+ languages.
- Wisebase and Sider Claw
- Wisebase is a knowledge base for uploaded files and saved websites. Claw, in the mobile app, takes a request and researches, compares, extracts and compiles the results.
Sider pricing
- Starts at
- $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year
- Free plan
- The iOS app is free to download and the Chrome extension lists free multi-chatbot support. Neither store listing says how much usage the free tier includes.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | The apps and the browser extension are free to install. The store listings do not state how much usage is included without a plan. |
| Pocket Plan | $49.99per year (US App Store in-app purchase) | A plan for mobile use. Sider's reply to an App Store review says Pocket credits cannot be used in the desktop browser. |
| Basic | $9.99per month (US App Store in-app purchase) | Listed as Sider Basic Plan Monthly. The App Store listing does not describe what the plan includes. |
| Pro | $19.99per month (US App Store in-app purchase) | Listed as Sider Pro Plan Monthly. The App Store listing does not describe what the plan includes. |
| Unlimited | $39.99per month, or $299.99 per year (US App Store) | Listed as Sider Unlimited Plan, monthly or yearly. The App Store listing does not describe what the plan includes. |
Read from apps.apple.com on Oct 5, 2026. Prices change, so confirm with Sider before you buy.
Ways to pay less
- Annual discountUnlimited costs less when paid yearly
The US App Store lists the Unlimited plan at $39.99 a month or $299.99 a year. Twelve monthly payments come to $479.88, so the yearly price is about 37% lower.
Stated on apps.apple.com
How people rate the Sider app
4.7
out of 5 for the iPhone and iPad app
4,298 ratings on the App Store in the United States, read Oct 5, 2026. It rates the app, not everything the product does. See the listing
Works with
Sider alternatives
- Sider vs Monica
Free plan · from $8.3/mo
- Sider vs Merlin
Free plan
- Sider vs ChatHub
Free plan · from $14.99/mo
- Sider vs Poe
Free plan · from $4.99/mo
- Sider vs ChatGPT
Free plan · from $8/mo
Common questions
Is Sider free?
Sider has a free plan. The iOS app is free to download and the Chrome extension lists free multi-chatbot support. Neither store listing says how much usage the free tier includes. Paid plans start at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
How much does Sider cost?
Sider lists 5 plans. Free: $0. Pocket Plan: $49.99 per year (US App Store in-app purchase). Basic: $9.99 per month (US App Store in-app purchase). Pro: $19.99 per month (US App Store in-app purchase). Unlimited: $39.99 per month, or $299.99 per year (US App Store). Prices were read from apps.apple.com on Oct 5, 2026.
What platforms does Sider work on?
Sider is available on macOS, Windows, iOS and Android. It also has a browser extension.
Does Sider offer any discounts?
Sider publicly lists the following: Unlimited costs less when paid yearly.
How is Sider rated?
Sider's iPhone and iPad app averages 4.7 out of 5 from 4,298 ratings on the App Store in the United States, as read on Oct 5, 2026. That is the store's rating of the app, not a score from us.
Does Sider have a Linux app?
No Linux app was listed when its pages were read on Oct 5, 2026. Sider is listed for macOS, Windows, iOS and Android.
Is Sider open source?
Sider is not described as open source on its own site, as read on Oct 5, 2026.
What does Sider integrate with?
Sider's listing names Gmail, YouTube, Google Search, Bing, DuckDuckGo, Quora, Stack Overflow and LinkedIn. A listing names up to eight integrations, so it may connect to more.
Who makes Sider?
Sider is made by Vidline Inc.
What are the alternatives to Sider?
The closest alternatives to Sider in our directory are Monica, Merlin, ChatHub, Poe and ChatGPT. Each one has a side-by-side comparison with Sider.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 5, 2026. What people say is linked where it appears.