
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. UI Copilot (Design Copilot) records 0 monthly visits with — growth and Free pricing.
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | sider.ai | chromewebstore.google.com |
| Pricing Model | Freemium | Free |
| Monthly Visits | 2.64M (2,644,740) | 0 (0) |
| MoM Traffic Delta |
|---|
| -314.2K (-10.6%) |
| 0 (—) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🌐 Global (—) |
|---|
| Direct Visits / mo | 1.7M | 0 |
|---|
| User Rating | 4.5 | 4 |
|---|
| Supported Platforms | Website | Browser Extension |
|---|
AI sidebar and browser agent for reading, writing and research
A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.
Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.

AI design feedback on any website, right from your Chrome toolbar
Click, drag, and release over any region of a webpage to capture exactly the area you want reviewed.
Captured regions are analyzed by Google Gemini models and returned as a concrete list of design suggestions in seconds.
Because it reviews what is rendered on screen, it functions on production sites, staging environments, and local development builds alike.
Your Gemini key stays in browser sync storage, accessible only to the extension, and is used solely for Gemini API calls.

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.

All-in-one AI assistant across web, browser, desktop and mobile
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.

Free / Open-sourceGive your coding agent real design judgment

SpecialistFrom idea or sketch to editable wireframes, hi-fi UI and code in minutes
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.

Free / Open-sourceOpen-source frontend stack for building AI agents and copilots inside your own product


Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.

SpecialistAI coding agent for VS Code, JetBrains and Visual Studio with bring-your-own-key model freedom
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
All-in-one AI assistant across web, browser, desktop and mobile
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Free / Open-sourceGive your coding agent real design judgment
SpecialistFrom idea or sketch to editable wireframes, hi-fi UI and code in minutes
Free / Open-sourceOpen-source frontend stack for building AI agents and copilots inside your own product
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.