Sider
Sider is an AI sidebar and browser agent available on Android, iOS, macOS, Windows, the web, and as a browser extension.
What Sider is
Sider is an AI sidebar and browser agent available on Android, iOS, macOS, Windows, the web, and as a browser extension. Its Chat tool summarizes, explains, or translates webpages, PDFs, and YouTube content, then answers follow-up questions using models including GPT, Claude, and Gemini. Hand researches, compares, extracts, and organizes information across websites, including pages requiring a login, and can triage a Gmail inbox. Code changes webpages from plain-language instructions and remembers those changes for later visits. Create generates images and videos and produces slides and documents. Sider also supports web search, file uploads, mobile apps, and app integrations. Windows features include multi-model group chat, reusable prompts, real-time web access, file analysis, media creation, and translation. iOS ChatScreen discusses visible content and supports images plus more than 30 file types. Sider has a free plan; content for AI requests passes through its servers to the selected provider.
Good
- Free plan available
- Works across major platforms
- Webpage and PDF summarization
- Browser research and extraction
- Image, video, slide, and document creation
Watch out
- AI request content passes through Sider servers
- Services are not designed for HIPAA or FISMA compliance
- Higher plans use more credits for stronger cloud computers
Who it suits
Sider suits people who want AI help while browsing, working with files, or creating media. Its broad platform support fits users switching between desktop, mobile, and browser environments.
Verdict
Sider combines browser assistance, web automation, and content creation across desktop and mobile platforms. Its free plan provides an entry point, while privacy and compliance details deserve attention for sensitive work.
Plans and prices
From Sider's own pricing page, checked 21 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Sider Basic | — | — |
| Sider Professional | — | — |
| Sider Ultra | — | — |
The facts
Each one read from Sider's own pages, with the date it was checked.
Where it runs
- App integrations
- Yeschecked 21 Sep 2026
- Browser automation
- Sider Hand can research, compare, extract, and organize information across websites, including sites where the user is logged in.checked 11 Oct 2026
- Mobile apps
- Yeschecked 21 Sep 2026
- Platforms
- Sider lists a web app, browser extensions, iOS and Android apps, and Windows and macOS desktop apps.checked 11 Oct 2026
What it does
- Chat
- Sider Chat can summarize, explain, and translate webpage, PDF, and YouTube content, and answer follow-up questions using models including GPT, Claude, and Gemini.checked 11 Oct 2026
- Creation
- Sider Create supports generating images and videos and creating slides and documents.checked 11 Oct 2026
- Desktop features
- The Windows app page lists multi-model group chat, reusable prompts, real-time web access, file analysis, image and video creation, and translation.checked 11 Oct 2026
- File uploads
- Yeschecked 21 Sep 2026
- Image generation
- Yeschecked 21 Sep 2026
- Integrations
- Sider lists GPT, Claude, Gemini, and Grok among its chat models, and says Hand can triage a Gmail inbox.checked 11 Oct 2026
- Mobile features
- Sider’s iOS page describes ChatScreen for discussing on-screen content and support for images and more than 30 file types.checked 11 Oct 2026
- Privacy and AI processing
- Sider’s privacy policy says content needed for AI requests is sent through Sider’s servers to the selected third-party AI provider; the iOS app asks for explicit consent before sending it.checked 11 Oct 2026
- Product
- Sider describes itself as an AI sidebar and agent for browser tasks, with Chat, Hand, Code, and Create tools.checked 11 Oct 2026
- Security and compliance
- The privacy policy describes safeguards including firewalls, encryption, and access controls, while the terms say the services are not designed for HIPAA or FISMA compliance.checked 11 Oct 2026
- Support
- The Help Center offers searchable FAQs and says users can submit feedback to customer service for support.checked 11 Oct 2026
- Web customization
- Sider Code can change a webpage from plain-language instructions and remember those changes for future visits.checked 11 Oct 2026
- Web search
- Yeschecked 21 Sep 2026
The company
- Company
- Sider’s terms identify Vidline Inc. as the company operating the service and give an address in Medford, Massachusetts.checked 11 Oct 2026
- Headquarters
- Boston, Massachusetts, United Stateschecked 28 Sep 2026
Money
- Free plan
- Yeschecked 21 Sep 2026
- Plans
- The pricing page says all plans include all features and that higher plans provide more credits and a stronger cloud computer; it does not expose plan names or prices in the page text.checked 11 Oct 2026
Alternatives to Sider
- 1
Gemini
Free planAndroidiOSWebAPI9.2Free plan - 2
Microsoft Copilot
Free planAndroidiOSWebWindows9.0From $99.99 a year - 3
Perplexity
Free planAndroidiOSWebAPI9.0From $20 a month - 4
Amazon Q
Free planAndroidiOSWebAPI9.0Free plan - 5
Claude
Free planAndroidiOSWebAPI8.8Free plan - 6
Onyx
Free planOpen sourceWebAPIExtensionLinux8.6From $20 a month