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Sider AI Review

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Browser-based AI sidebar that summarises web pages, supports multi-model chat (GPT-4, Claude, Gemini), and assists with reading and writing across any site.

Chat Frontends & ClientsGeneral-Purpose Assistants

Verdict

Sider AI is a feature-rich browser extension competing with Monica and Merlin, distinguishing itself by letting users switch between leading AI models — GPT-4, Claude, and Gemini — within a single sidebar interface. This model-agnostic approach is its primary strength, giving power users flexibility without tab-switching. The tradeoff is that the breadth of features can feel overwhelming, and the free tier is limited compared to dedicated single-model tools.

What it does

Research faster with Sider AI—summarize web pages, take notes, generate reports, and chat with leading AI models. Powered by ChatGPT, Gemini, Claude, Grok, Deepseek, etc. Try the best AI sidebar now!

Best for

Researchers and students looking for an AI-powered research assistant.

At a glance

Free planYes
Login requiredYes
MemoryNo
VoiceNo
Image generationNo
Group chatNo
Mobile appNo
NSFW policyRestricted
PricingFree + paid — Pro plan unlocks higher usage limits and premium models

Pros & cons

Pros
  • Access GPT-4, Claude, and Gemini in one sidebar
  • Works across any webpage for summarisation and writing help
  • Large user base with active development
Cons
  • Free tier has strict usage caps
  • Feature sprawl can overwhelm new users

Related tools

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Frequently asked

Is Sider AI free to use?
Yes. Sider AI has a free plan — Pro plan unlocks higher usage limits and premium models
Does Sider AI have memory?
No persistent memory — sessions don't carry over by default.
Can Sider AI do voice or images?
Voice: no. Image generation: no.
What are the best alternatives to Sider AI?
Browse the AI Tools Directory for related tools.

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Notes from users

Concrete observations only — pricing changes, real-world feature behavior, what didn't work for you. Vague hot-takes get filtered out by automated review. No links allowed.

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