Sider: Adds a versatile AI sidebar to your existing browser, but lacks dedicated built-in privacy protection and mobile optimization. Quetta Browser records 226,049 monthly visits with +54.2% month-over-month growth and Free pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Privacy-first mobile browser with built-in ad blocking and video downloads
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | quetta.net | sider.ai |
| Pricing Model | Free | Freemium |
| Monthly Visits | 226.05K (226,049) | 2.64M (2,644,740) |
| MoM Traffic Delta | +79.5K (+54.2%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇨🇳 China (21.5%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 63.9K | 1.7M |
| User Rating | 4.1 | 4.5 |
| Supported Platforms | Website | Website |
Privacy-first mobile browser with built-in ad blocking and video downloads
Quetta checks pages for supported ad, pop-up and tracking patterns and blocks matching requests or elements, with the option to review activity and adjust protection when a site misbehaves.
When compatible media is detected, you can save MP4 or WebM files and supported M3U8/HLS streams directly from the page without switching to a separate downloader.
Picture-in-picture, background audio, playback speed, captions and casting help adapt supported videos to how you actually watch on mobile.
Install, enable, disable or remove many extensions from the Chrome Web Store and Edge Add-ons inside the Android browser, giving mobile users desktop-style customization.
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.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
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.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Synthesizes context across desktop tabs and documents with AI, whereas Quetta targets privacy-first mobile web browsing.
Synthesizes context across desktop tabs and documents with AI, whereas Quetta targets privacy-first mobile web browsing.
The agentic AI browser that reads your tabs, files, and screenshots as context
The agentic AI browser that reads your tabs, files, and screenshots as context
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
Integrates local offline LLMs and AI web agents, but operates primarily as a desktop browser rather than mobile.
Integrates local offline LLMs and AI web agents, but operates primarily as a desktop browser rather than mobile.
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
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.
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.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
An agentic browser built to act on your behalf
