Sider
Verified Oct 14, 2026 ActiveBrowser sidebar that puts GPT, Claude, Gemini, and other models next to any page you're reading.
Listed on EffectHub ·
Pricing
- Pricing model
- Freemium
The pricing page blocked automated fetches today (Cloudflare challenge), so no price is confirmed. Sider's help center, as indexed by search, says current plans are Lite, Pro and Max with monthly credits, older Basic/Plus/Unlimited plans are no longer sold, free users get 30 basic credits a day, and monthly Stripe payments are non-refundable.
Use tool ↗About Sider
Sider is a browser extension and app that adds an AI sidebar to any page, letting you summarize, translate, or ask questions about the content you're viewing without switching tabs. It sends one prompt to several model families, including GPT, Claude, Gemini, DeepSeek and Grok, from a single panel, and adds image generation, chat with PDFs and YouTube videos, deep research and a personal knowledge base. It ships as extensions for Chrome, Edge and Safari plus apps for iOS, Android, Windows and Mac. Usage is metered in credits, with a small daily allowance on the free plan.
- Platforms
- Web · Chrome extension · Windows · macOS · iOS · Android
- API
- Not confirmed
- Last verified
- Oct 14, 2026
Verified sources
- sider.ai and its pricing and help-center pages returned HTTP 403 behind a Cloudflare challenge to curl and WebFetch (15 October 2026)sider.ai ↗
- Help center, as indexed by web search on 15 October 2026: current plans are Lite, Pro and Max with monthly credits; legacy Plus, Unlimited, Professional, Basic and Starter plans are no longer on sale; monthly Stripe payments are non-refundablesider.ai ↗
- Credit FAQ, as indexed by web search on 15 October 2026: free users get 30 basic credits per day plus limited YouTube summaries, image generations and PDF chatssider.ai ↗
Is Sider legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- Domain registered
- Feb 14, 2023 (3 years ago)Registry record (RDAP), registrar GoDaddy.com, LLC, looked up Sep 15, 2026
- TLS certificate
- Issued by Google Trust Services, valid until Dec 29, 2026Seen in our own connection to the site on Oct 14, 2026
- Last checked
- Oct 14, 2026The site answered
- Operated by
- Sider, United StatesOur research, card verified Oct 15, 2026
Pros & cons of Sider
Sider puts a chat panel on top of whatever page you're on, so you can ask about an article or PDF without copying it into a separate tab. The catch is that heavier use beyond the free daily cap needs a paid tier, and pricing quoted across review sites is inconsistent, so the entry price is worth confirming before committing.
Pros
- Works as a sidebar on any web page rather than a separate chat tab
- Routes one prompt to several models (GPT, Claude, Gemini, DeepSeek, Grok)
- Ships native apps for iOS, Android, Windows, and Mac plus browser extensions
- Can chat with PDFs and YouTube videos, not just plain text
Cons
- Free tier is capped at a small number of daily uses
- Independent pricing write-ups disagree on exact plan costs depending on where you check
- No public API for developers
Best for
- Reading and summarizing long articles or PDFs without leaving the page
- Comparing answers from several models in one panel
- People who want one subscription instead of several separate chatbot logins
Not for
- Anyone who needs one authoritative source rather than model-hopping
- Teams needing an API or backend integration
Watch out: Sider replaced its plan line-up in 2026 — older Basic, Plus and Unlimited plans are no longer sold, and prices quoted on review sites mostly describe them — while monthly payments on current plans are non-refundable, so check the live pricing page and start with a single month.
Alternatives to Sider
Sider head-to-head
Side-by-side fact sheets against the competitors our research or their makers name — pricing, platforms, API and both verdicts on one page.